mpr2000 - home - p&b -- p&b · pdf fileissue i mpr2000 digital motor protection relay...

Issue I

MPR2000 Digital Motor Protection Relay

P&B EngineeringBelle Vue WorksBoundary StreetManchesterM12 5NG

Tel: 0161 230 6363Fax:0161 230 6464

E-mail [email protected]

Contents

CONTENTS ...................................................................................................................................................................... 1

1. INTRODUCTION...................................................................................................................................................... 1

2. SUMMARY OF MPR2000 FEATURES.................................................................................................................. 1

2.1 PROTECTIVE FUNCTIONS ........................................................................................................................................ 12.2 DISPLAYED DATA................................................................................................................................................... 22.3 FEATURES .............................................................................................................................................................. 2

3. TECHNICAL SPECIFICATION ............................................................................................................................. 3

3.1 TECHNICAL DATA .................................................................................................................................................. 33.1.1 AUXILIARY POWER SUPPLY................................................................................................................................. 33.1.2 PHASE CURRENT INPUTS ..................................................................................................................................... 33.1.3 EARTH FAULT CURRENT INPUTS ......................................................................................................................... 33.1.4 LINE VOLTAGE INPUTS ........................................................................................................................................ 33.1.5 THERMISTOR/RTD INPUTS (3 OR 5 CHANNEL) ................................................................................................... 33.1.6 OVERLOAD ALARM AND TRIP CURVES................................................................................................................ 33.1.7 CURRENT UNBALANCE ALARM AND TRIP ........................................................................................................... 33.1.8 FAULT TIME DELAYS .......................................................................................................................................... 43.1.9 RELAY CONTACTS ............................................................................................................................................... 43.1.10 DIELECTRIC STRENGTH ..................................................................................................................................... 43.2 MPR2000 IMMUNITY AND EMISSIONS TESTS ............................................................................................ 4

4. MPR2000 SCHEMATIC DIAGRAM ...................................................................................................................... 4

5. MPR2000 MEASURED INPUTS ............................................................................................................................. 6

5.1 POWER SUPPLY ...................................................................................................................................................... 65.2 VT INPUTS ............................................................................................................................................................. 65.3 CT PHASE INPUTS .................................................................................................................................................. 65.4 EARTH FAULT CT INPUTS ...................................................................................................................................... 65.5 TEMPERATURE INPUTS ........................................................................................................................................... 65.6. POWER. ................................................................................................................................................................. 6

6. MPR2000 CONTROL INPUTS/OUTPUTS ............................................................................................................ 7

6.1 OUTPUT RELAYS .................................................................................................................................................... 76.2 CONTROL INPUTS ................................................................................................................................................... 76.3 AUTHORISE KEY .................................................................................................................................................... 76.4 SERIAL PORT .......................................................................................................................................................... 76.5 SPEED SWITCH ....................................................................................................................................................... 76.6 EXTERNAL FAULT 2................................................................................................................................................ 76.7 EXTERNAL FAULT 3................................................................................................................................................ 76.8 EMERGENCY STOP.................................................................................................................................................. 7

7. MPR2000 FACEPLATE FUNCTIONS ................................................................................................................... 8

7.1. LED STATUS PANEL ............................................................................................................................................. 8

8. MPR2000 FUNCTIONAL KEYPAD & DISPLAY................................................................................................. 9

9. MPR2000 SETTING AND DATA PAGES ............................................................................................................ 11

9.1 MPR2000 COMMUNICATION SETTINGS ............................................................................................................... 119.2 SYSTEM SETTINGS................................................................................................................................................ 119.3 VOLTAGE SETTINGS ............................................................................................................................................. 129.4 CURRENT SETTINGS ............................................................................................................................................. 139.5 TEMPERATURE SETTINGS ..................................................................................................................................... 169.6 TRIPPING/ALARM OPTIONS................................................................................................................................... 169.7 MPR2000 SETTING PAGES SUMMARY ................................................................................................................. 179.8 MPR2000 DATA PAGES SUMMARY ..................................................................................................................... 19

10. MPR2000 COMMUNICATIONS......................................................................................................................... 19

11. MPRSET SOFTWARE ......................................................................................................................................... 20

12. MPR2000 FLASH/CONSTANT MESSAGES..................................................................................................... 20

13. MPR2000 INTERNAL TEST ROUTINES.......................................................................................................... 20

14. MPR2000 FAULT FINDING................................................................................................................................ 21

15. MPR2000 THERMAL OVERLOAD PROTECTION........................................................................................ 22

16. MPR2000 INSTALLATION ................................................................................................................................. 26

16.1 CASING............................................................................................................................................................... 2616.2 MPR2000 TERMINATIONS ................................................................................................................................. 27

17. FAST SCAN ANALOGUE DATA........................................................................................................................ 28

18. CHANGES TO THE MANUAL. .......................................................................................................................... 28

Issue I 29/08/03 Page 1 MPR2000

1. Introduction

The MPR2000 Motor Protection Relay is a highly sophisticated microprocessor based motor protection relayspecifically designed to be used on motors with full load currents up to 2000 Amps, at any voltage and as an integralpart of any type or manufacture of Motor Control Centre. All of the latest features are included in the MPR2000 toallow total protection and monitoring of motor starters.

The MPR2000 can be used to protect Direct on Line, Star Delta, Reversing and Two speed motor starters. TheMPR2000 can be used in conjunction with A.C. Variable Speed Drives or Soft Starters without any affect on theprotection performance.

The MPR2000 monitors current, voltage and temperature inputs to provide the most comprehensive motor protectionpackage ever produced by P & B Engineering. This combined with it's monitoring functions and a high speedcommunications facility make the MPR2000 the most attractive Motor Protection device available today.

All MPR2000 setting parameters are programmed independently for each unit via the integral keypad and liquid crystaldisplay on the front plate or via the RS485 communications port and the IBM PC based MPCSET software packageavailable with the MPR2000.

During operational conditions the LCD also gives access to accurate running, statistical and fault data such as; PhaseVolts, Phase Amps, Thermal capacity, Time to Trip, Phase unbalance, Motor hours run, No. of starts and many more.

Light Emitting Diodes mounted on the front plate give visual indication of the motor status such as Motor Running,Motor Stopped, Alarm or Trip conditions etc.

Flexible high speed communications to PLC or DCS systems is obtained through the MPR2000's RS485communications port, allowing computer access to full monitoring of motor data,including : running data, motor statistical data and input status.

All MPR2000 protective functions can be individually configured to enable or disable tripping and alarm functions,enabling protection to be simplified for the very lowest motor ratings. In addition each protective function can be setto allow self or manual reset after alarm or trip and manual reset can be set to allow resets after an alarm or trip to bemade locally, or remotely via the RS485 port, or by authorised personnel only.

The MPR2000 has Power Indication. This gives Power (Watts and VA) and Power Factor read-outs in the measureddata page. It requires a 3 phase voltage input.

2. Summary of MPR2000 Features

2.1 Protective Functions

Voltage Based:3 Phase Undervoltage Protection3 Phase Overvoltage ProtectionPhase Sequence ProtectionPhase Loss Protection

Current Based:Motor Starts LimitationThermal Overload ProtectionLoad increase AlarmThermal Capacity Pre-AlarmLocked Rotor/Stall Protection2 Stage Undercurrent ProtectionHigh Set Overcurrent ProtectionLow Set Overcurrent Protection2 Stage Current Unbalance Protection2 Stage Earth Fault ProtectionExcess Starting Time ProtectionExcess No. of Starts Protection


RTD/Thermistor Based:3 Channel RTD/Thermistor Temperature Protection5 Channel RTD/Thermistor Temperature Protection (Optional)

2.2 Displayed Data

Measured DataBoth Phase Volts and Line VoltsEarth Fault Phase CurrentTotal Real PowerTotal VA PowerPower FactorRTD/Thermistor Channel resistance

Calculated DataMotor Load - Percentage FLCThermal Capacity UsedTime to TripTime to StartUnbalance Current

Logical Input StatusMotor Available IndicationIndividual Status of all Input Contacts

Statistical DataMotor Hours RunNumber of Motor StartsNo.of Motor TripsLast Start TimeLast Peak Starting Current

Fault DataLast FaultLast AlarmPhase Currents at Time of TripEarth Fault Current at Time to TripPhase Volts at Time of Trip

2.3 Features

• LCD Display for Setting Parameters and Displayed Data• Functional Keypad enables settings to be made independent of communications.• IBM PC based MPCSET software enables Setting Parameters to be configured via RS485 Port.• All functions operate fully independently of communications• Non Volatile Memory for all setting parameters calculated, statistical and fault data• Full self diagnostics and internal watchdog facility• RS485 port enables full monitoring by remote DCS/PLC systems


3. Technical Specification3.1 Technical Data3.1.1 Auxiliary Power Supply

AC Nominal: 110V AC, Range: 80 - 135V AC 240V AC, Range: 160 - 270V ACDC Optional 30v DC, 110v DC (other values on request)Frequency: 45/65 HzMaximum Power Consumption: 6 - 8VA

3.1.2 Phase Current InputsMethod: True RMS, Sample time 0.5mSRange: 0.05 to 12 x Phase CT Primary AmpsFull Scale 12 x Phase CT Primary Amps settingAccuracy: +/- 1.5% for 0.9 to 1.5 x CT Primary +/- 5% above 1.5 x CT Primary +/- 3% + 0.02 below 0.9 x CT Primary

3.1.3 Earth Fault Current InputsMethod: True RMS, sample time 0.5mSRange: 0.05 to 1.0 x E/F CT PrimaryFull Scale: 1.0 x E/F CT Primary Amps SettingAccuracy: +/- 1.5% of Full Scale

3.1.4 Line Voltage InputsMethod: True RMS, sample time 0.5mSWithout VT Transformer

Range: 90 - 660V ACAccuracy: +/- 1.0% of Full Scale

With VT TransformerRange: 90 - 660V x (VT Primary/VT Secondary) Limited to 25kVAccuracy: +/- 1.0% of Full Scale

3.1.5 Thermistor/RTD Inputs (3 or 5 Channel)Time Delay: 0.5 +/- 0.2 secondsThermistor Range: 0.1 - 30 Kilo-OhmsAccuracy: +/- 0.1 Kilo-Ohm up to 5 Kilo-Ohm +/- 3% above 5 Kilo-OhmRTD Range: 100 to 240 OhmsAccuracy: +/- 3%Max. Wire Resistance: 25 Ohms

3.1.6 Overload Alarm and Trip CurvesFault Time Accuracy: +/- 1 second up to 10 seconds +/- 1 second +/- 2% above 10 secondsThreshold Current Level: Overload Setting +/- 1.5%

3.1.7 Current Unbalance Alarm and TripMethod: Unbalance = 100 x (Imax - Imin) / Ir % Where Imax = max. of 3 phase currents Imin = min. of 3 phase currents Ir = Larger of Imax or Motor FLCAlarmThreshold Unbalance Level: 50% of Unbalance current +/- 2%Fixed Time Delay Accuracy: 1.0 +/- 0.5 secondsTrip CurvesThreshold Unbalance Level: Unbalance Current Setting +/- 2%Trip Time Accuracy: +/- 1 second up to 10 seconds +/- 1 second +/- 2% above 10 sec.


3.1.8 Fault Time DelaysAccuracy: +/- 0.5 seconds or +/- 2% of timeExceptionsHigh Set Over-current: -0.1 to +0.2 sec. up to 1 secondEarth Fault Trip: -0.1 to +0.2 sec. for less than 1 second delay Total Run TimeAccuracy: +/- 2%

3.1.9 Relay ContactsRated Load: 8A @ 250V AC/8A @ 30V DC (Resistive) 6A @ 250V AC/3A @ 30V DC (Inductive)Maximum Operating Voltage: 280V AC, 125V DCMaximum Operating Current: 8 AmpsMinimum Permissible Load: 5V DC, 100mANote: AC Inductive load PF = 0.4 DC Inductive Load L/R = 7mS

3.1.10 Dielectric Strength2000V AC for 1 minute, between ground and: * Current Inputs * Voltage Inputs * Auxiliary Power Supply, with 1000pF Suppression Capacitors removed * Control Terminals, with 1000pF Suppression Capacitors removed.

3.2 MPR2000 IMMUNITY AND EMISSIONS TESTS

The MPR2000 was successfully tested at the ERA Technology Centre in Leatherhead on the 7th April 1992 to complywith the European Standards on Emissions (EN50081-1) and Immunity (EN50082-2).

4. MPR2000 Schematic Diagram

The following diagram shows a typical installation schematic diagram of the MPR2000 unit. The following pointsshould be noted:

Although not shown on the diagram it is recommended that the 3 phase input voltage should be fused after the take offpoint from the system voltage or in the case of HV systems where a voltage transformer is used the secondary shouldbe also be fused.

When using the residually connected Earth Fault scheme it may be necessary to fit a swamping resistor between thecommon connection and the earth connection. It is generally advisable to use Core balance ct's whenever possible.

If an externally mounted Emergency Stop push-button isfitted to the motor starter it may be beneficial, so that theMPR2000 reads Emergency Stop as a trip, to connect acontact from the button to the External Emergency Stopterminals shown on the diagram.

The case earth must be externally grounded to earth. Theterminals 11, 12 and 54 are internally connected and one ofthem should be connected to either the case earth or separateearth if a separate instrument earthing is required. This canbe done as shown in the diagram.

Issue H 1/5/98 Page 5 MPR2000

�

��

��

��

�

��

� ��

� ��

� �� ! " # $ "% & "' " ( # " ) # * +

,-,.,/

,0

- 1/ 2/ ,/ 3/ -/ // ./ 0/ 4/ 5/ 1. 2. .. 0. /

� 6 -6 36 ,

78 9:; <=>

?@AB

ACAD

EF G HI I I JK G K L M N K O M G O E

P QR S T T T

UVWXWYWZW UW[W\W WW]UVWXWYW ZW UW [

\X^_` a

bc

de fde gde hde ih i h h h g h f hj hk hl hm

NOTE:

SWAMPINGRESISTOR

AUTHORISE KEY (CLOSED = AUTHORISED)

EXTERNAL FAULT 2 (NO)

EXTERNAL FAULT 3 (NO)

SPEED SWITCH (OPEN = HIGH)

ALTERNATIVE RESIDUAL EARTH FAULT CONNECTION

110/240V AC[80-265V DCOPTIONAL]

INTERNAL

POWER SUPPLY ON

LOGIC SUPPLY

ALT. AUX POWER SUPPLY

3 RTD OR 3 THERMISTORS

DIP SWITCH SETTINGS

ON [THERMISTOR]

OFF [RTD]

CT1 CT2 CT3 CT4

MOTOR

RS485 SERIAL PORT

SHIELD

MEASURMENTVOLTAGES

AUX 2 RELAY [TRIP]

AUX 1 RELAY [ALARM]

GND

THERMISTOR

[0.1K-30K] [100-240 OHMS]

CONTACT SHOWN INDE-ENERGISED STATE

NOTE TERMINALS 11,12 & 54 ARE INTERNALLYCONNECTED.

njo p n fm p n fq pnj g p nj i p nj h p

CHANNEL 1

CHANNEL 3

CHANNEL 2

j ij hj g CHANNEL 5

CHANNEL 4

SCREENr rts ru

v w rxE/F TRIPy z {OVERLOAD TRIP

EXTERNAL EMERGENCY STOP (NC)

INDICATION ONLY

| |

RTD.

RELAY SUPPLIED AS 1 AMPOR 5 AMP AS REQUIRED.

OPTIONAL 2 RTD INPUTSFOR CHANNELS 1,2&3

[0-200 deg C]

FOR SEPERATE INSTRUMENTEARTHING TERMINAL 11MUST BE CONNECTED TOA SEPERATE EARTH FROMTHE CASE.OTHERWISE CONNECT TOTHE CASE. (SEE SECTION 4.0)

FOR MOTOR APPLICATIONS WITHOUT THE USE OF THE RTD INPUTS:

P&B ADVISE THAT A SHORTINGLINK BE APPLIED ACROSS THEINPUT TERMINALS OF EACHCHANNEL TO PRODUCE A ZERO

} {~u ~y~x ~} ~v

CHANNELNOT IN USE

THE CHANNEL INPUTS AREFAIL-SAFE i.e, WHEN 'OPEN' THE READING WILL BE 'HIGH'

READING.

Issue H 1/5/98 Page 6 MPR2000

5. MPR2000 Measured Inputs

5.1 Power SupplyThe MPR2000 requires a 110v or 240v A.C. voltage to supply the unit and provide the A.C. voltage to the externalinputs.

A DC version (80-265V DC) can also be supplied as an optional extra.

5.2 VT InputsThe MPR2000 monitors single or three phase voltage, which can be directly connected for voltages up to 660v and viaa suitable voltage transformer for system voltages above 660v . In order that the MPR2000 can measure and displayactual volts, the system volts and VT primary and secondary volts must be set in the 'System Settings' page.

If single phase voltage reference only is available this is connected to L1 and N with L1,L2,L3 commoned. The SystemVoltage setting in the 'System Settings' page must then be set to 1.732 x the line voltage. In addition the PhaseSequence and Phase Loss protective functions must be disabled

5.3 CT Phase InputsThe MPR2000 can be supplied for use with either 5A or 1A CT secondaries.(To be specified.)

5.4 Earth Fault CT InputsThe MPR2000 can detect earth faults using either a separate core balance CT or by connecting the 3 phase CT'sresidually. Either 5A or 1A CT secondaries must be specified. When residually connected phase CT's are used aswamping resistor may have to be fitted across the common connection. Please note that the Earth Fault value is notdisplayed on the MPR2000 till it reaches a value greater than 50% of the lowest Earth Fault Trip value.Refer to P & BEngineering for further information.

5.5 Temperature InputsThermistors of either positive or negative temperature coefficients can be directly connected to the MPR2000 byselecting either PTC or NTC in the default menu. The alarm and tripping range can be adjusted between 100 ohms and30,000 ohms.

RTD's can also be directly connected to the MPR2000 and selecting between the two inputs is via the front platekeypad. As the resistance of RTD's is relatively low, the MPR2000 use a three wire measurement system for eachRTD, the third wire is required to compensate for the wire resistances. The alarm and tripping range of the RTD's canbe adjusted between 100 ohms and 240 ohms. Default setting is for RTD inputs.

In addition to selection of Thermistor or RTD temperature inputs via the Temperature setting page, dip switcheslocated behind the rear cover of the MPR2000 require setting. This can be carried out on site, however it is advisableto specify the type being used, at the time of order such that the change can be made prior to the unit being despatched.

The earth for the RTD’s are on terminals 11, 12 and 54. These are internally connected so only terminal 11 need bewired to an external earth if requested. See Section 4. For further details.

As an optional extra a 5 channel version is available, with this version 3 channels have common alarm and tripsettings and 2 channels have individual alarm and trip settings. The 2 channels are always RTD’s but the 3channels are RTD’s (default) or Thermistors (Optional).

5.6. Power.The Power applied to a motor is displayed on the MPR2000 and is calculated from the Current and Voltage inputs tothe relay. Please note that due to this calculation the Power and Power Factor is less accurate for Motors with a CTPrimary of less than 10 Amps.


6. MPR2000 Control Inputs/Outputs6.1 Output Relays

The MPR2000 has 4 output relays which can be assigned as follows:Pins 5,7,9 - Overload Trip (Indication)Pins 6,8,10 - Earth Fault Trip (Indication)Pin 33,35,37 - Aux. Relay 1 = Alarm con A con B start/runPins 34,36,38 - Aux. Relay 2 = Trip (Trip fail safe) cont A Cont B

6.2 Control Inputs

The MPR2000 provides several inputs to provide full protection for the motor. The supply to these terminals is derivedfrom the Power Supply to the relay. The live side of each inputs is commoned to enable simplified wiring to the unit,however it should be noted that the common terminals are always live when power is connected to the MPR2000 andthe should always be isolated prior to working on the wiring at the rear of the unit.

The condition of all these inputs can be viewed at any time via the Logic Inputs/Contacts Data page which enablescomplete wire checking without the need to disconnect or even gain access to wiring.

6.3 Authorise KeyWhen this input is open it prevents unauthorised access to alter the parameter settings of the MPR2000. All settingscan be viewed via the LCD display irrespective of the state of this input. However with the input open, an attempt toadjust a setting will result in the " Unauthorised Access" message being displayed. In addition this input can be used torestrict fault and alarm reset, if the Auto and Panel reset options of protective functions are disabled a fault can only bereset from the panel if the authorised input is closed.

6.4 Serial PortThe Serial Port utilises a half duplex RS485 protocol allowing up to 32 MPR2000's to be daisy-chained together with asingle shielded twisted pair cable . Refer to P&B for details on communications.

6.5 Speed SwitchThis input is used when the safe stall time of the motor is less than or equal to the normal run up time of the motor, inwhich case the thermal overload feature will not provide adequate protection against stalling. Connection of a motorspeed switch, open when at high speed and closed when at low speed or standstill enables the MPR2000 to enable ordisable the locked rotor characteristic which is given under the Stall Time Factor setting.

6.6 External Fault 2This inputs allows for tripping or alarming of external protective devices or interlocks. When closed the fault ishealthy and when opened a trip and/or alarm occurs depending on the Tripping/Alarm settings. Auto-Reset whenenabled, occurs when the input contact closes.

6.7 External Fault 3This inputs allows for tripping or alarming of external protective devices or interlocks. When closed the fault ishealthy when opened a trip and/or alarm occurs depending on the Tripping/Alarm settings. Auto-Reset when enabled,occurs when the input contact closes.

6.8 Emergency StopThis input allows the MPR2000 to monitor the status and provide indication of the state of any of the externalEmergency Stop buttons which are normally directly wired to the contactor closing circuit. Opening of the input causesa trip or alarm depending on the Tripping/Alarms Settings.


7. MPR2000 Faceplate Functions

The MPR2000 Faceplate has been designed to provide all of the required information to the operator for the drive forwhich the unit is being used. This is achieved by using a LED Status Panel and a Functional Keypad with a LCDdisplay.

This eliminates the need for additional indication devices on the front of the motor starter panel such as Lamps,Ammeter, Voltmeter, Hours Run Indicator, Operations Counter, etc. which helps reduce the cost of the motor starterpanel and gives improved reliability by reduction of separate components.

The following section details the function of the Frontplate devices.

7.1. LED Status Panel

This panel incorporates 9 LED indicators whichprovide the main status indications for the MotorStarter panel

The LED's operate as follows:

MPR2000 POWER ON This green LEDilluminates when the auxiliary supply voltage to theMPR2000 unit is connected.

MOTOR STOPPED This green LEDilluminates on power up and also when the motorcurrent is less than 12% of FLC and also when a stopor fault signal is present.

MOTOR STARTING This amber LED isilluminated only when the motor is starting andremains illuminated providing the average motorcurrent is 110% or above of the Overload Setting.

MOTOR RUNNING This red LED illuminates after a motor has started providing the average motor current hasdecreased to below 110% of the Overload Setting and is above 12% of FLC

OVERLOAD This red LED illuminates when a Thermal Overload trip has occurred.

EARTH FAULTThis red LED illuminates when an earth fault trip has occurred.

MOTOR ALARM This red LED indicates that one of the MPR2000 Alarm functions has operated and remainslit until the condition no longer exists and a reset has been performed.

MOTOR FAULT This red LED illuminates when one or more of the MPR2000 Fault functions has operatedand stopped the motor. It remains lit until the condition no longer exists and a reset has been performed.

INTERNAL FAULT This red LED illuminates when an internal fault has been detected by the MPR2000watchdog feature and remains lit until the fault condition is no longer present and if required by the Alarm/Trippingsettings, a reset has been performed.

MPR POWER ON

STOPPED

STARTING

RUNNING

OVERLOAD

EARTH FAULT

ALARM

FAULT

INT. RELAY FAULT


8. MPR2000 Functional Keypad & Display

The MPR2000 is fitted with a functional keypad and a 32character Alpha-Numeric LCD (Liquid Crystal Display).This enables all settings to be viewed and configured oneach individual unit and enables the display of any of theMPR2000 drive data.

The following pages explain the function of the LCDdisplay and the function of each key:

Liquid Crystal Display

The MPR2000 has been equipped with a 2 line, 16character per line liquid crystal display. The display is usedfor the following functions:

Viewing and Changing of Setting ParametersViewing Data ParametersFlash and Constant Messages

Any Data parameter can be selected as the default displayby pressing the STORE key whilst displaying the desiredparameter. The MPR2000 will always return to display thisparameter if no key is pressed or no Flash/ConstantMessage is displayed for 5 minutes.

Set Page Key

This key when pressed enables the operator to select a page of the MPR2000 Setting parameters, for convenience thesetting parameters are grouped into logical pages. Each time the key is pressed the LCD display will show one of thepages titles as follows:

Communication SettingsSystem Parameter Settings

Voltage SettingsCurrent Settings

Temperature SettingsTripping/Alarm Options

Pressing the SET PAGE key again after the Tripping/Alarms Options title has been displayed will result in the displayreturning to the Communications Settings title and so on.

Data Page Key

This key when pressed enables the operator to select a page of the MPR2000 Displayable Data. For convenience thedata are grouped into logical pages. Each time the key titles as follows:

Measured DataCalculated Data

Logical Inputs - Contacts StatusStatistical Data

Fault Data

Pressing the DATA PAGE key again after the Fault Data title has been displayed will result in the display returning tothe Measured Data title and so on.

TIME TO TRIPNO TRIP EXPECTED

MOTOR PROTECTION RELAY

SETPAGE

LINEDOWN

LINEBACK

DATAPAGE

VALUE

VALUE

RESET STORETEST


Line Down Key

Pressing the LINE DOWN key enables the operator to scroll forward or down the particular page. The display willmove down one item at a time unless the button is held for over half a second in which case the scroll speed willincrease.

Line Back Key

Pressing the LINE BACK key enables the operator to scroll backwards or up the particular page of Settings or Data.The display will move back one item at a time unless the button is held for over half a second in which case the scrollspeed will increase.

VALUE Key

Pressing this key enable the operator to increase the value of the parameter displayed. The value will be increased byone increment every time the key is pressed unless the key is held down for half a second in which case the rate ofchange will increase.If the Authorise input is open and the key is pressed the flash message ' Unauthorised Access' will be displayed and thesetting parameter will not be changed.

VALUE

Key

Pressing this key enable the operator to decrease the value of the parameter displayed. The value will be decreased byone increment every time the key is pressed unless the key is held down for half a second in which case the rate ofchange will increase.If the Authorise input is open and the key is pressed the flash message ' Unauthorised Access' will be displayed and thesetting parameter will not be changed.

Store Key

This key is used to store a setting parameter to the non-volatile EEPROM memory after a change has been made usingthe above mentioned keys. After the key has been pressed the flash message ' DATA SAVED OK' will be displayed. Iffor any reason the change has not been correctly stored the message ' WRONG PARAMETER SAVED' will bedisplayed

If the STORE key is pressed whilst the display shows a Data parameter then the parameter currently being displayedwill be set as the default display which the MPR2000 will always revert to if no key is pressed for 5 minutes andprovided a flash or constant message is not being displayed.

If the value of a parameter is changed but not stored and the display is scrolled to another page the parameter valuewill be returned to the value stored in the EEPROM memory.

Note: It is possible to adjust and store setting parameters at any time , even whilst the motor is running. Changing thevalue of a displayed parameter has no effect on the operation of the units until the STORE key is pressed.After setting parameters have been stored to the EEPROM memory they are kept indefinitely, this feature does not relyon a battery backup system.

Reset KeyThis key enables the operator to reset MPR2000 Fault or Alarm conditions. Pressing of this key can only perform areset if the following conditions are met:

1 The Tripping/ Alarm Options for the specific fault or alarm re set to allow panel resets.2. The condition that caused the Fault or Alarm to occur no longer exists

Providing condition 2 is met an operator can override the settings in the Tripping/Alarm Options by closing theAuthorise input and pressing the reset button. Note if the reset key is pressed and the Authorised input is closed a flashmessage 'RESET THERMAL CAPACITY' is displayed and if the RESET button is pressed again whilst the message isdisplayed the level of Thermal Capacity will be reset to zero.


Test Key

The pressing of this key will cause the unit to display the Test/Maintenance menu. Using the LINE DOWN/LINEBACK keys the following options are displayed

Run Self TestProgram VersionStore Enable Default SettingsReset Statistical Data

For instructions on the use of these options refer to the Test Maintenance Options section later in this manual

9. MPR2000 Setting And Data Pages

9.1 MPR2000 Communication Settings

Drive NumberThis setting range 0-320 with a default setting of 0, identifies the MPR2000 by an overall system number . This doesnot affect the communications which uses the Serial Link Number.

Baud RateThis setting range 110,300,1200,4800,9600 Bits/Second with a default setting of 9600, determines the speed ofcommunications between the PCX or when directly connected the Host system and the MPR2000. This is normallyset to the highest speed 9600 Bits/Second.

Serial Link No.This setting range 1-33 with a default setting of 33, identifies the MPR2000 unit to the PCX unit to which the RS485Data Highway is connected, and is also required to be set if the MPRSET software is to be used .

Fast Scan Anal 1,2 & 3This setting range 0-201 determines the data that is sent to the PCX regardless of whether it asks for it. The settingsrefer to the address's of the data in the software of the relay.

Fast Scan Update.This setting range 0-30 s, in steps of 1 sec, determines the Fast Scan Update Time, i.e. the timeframe that the PCX asksfor the Fast Scan Data from the MPR2000.

To see the data that can be assigned to the Fast Scan Analogues please refer to section 17.

9.2 System Settings

Line VoltageThis setting range 0-660V in steps of 5v, or 1-22kv in steps of 100v, with a default setting of 415v, enables theMPR2000 to display the measured voltages in exact volts. When only single phase voltage reference is available thissetting must be set to root 3 times the system voltage in order for the under and over voltage protective functions tooperate correctly.

Primary VT VoltageThis setting, range ‘Not Connected’ or 100V - 22kv in steps of 10v upto 1000v and 100v above 110v, with a defaultsetting of ‘Not Connected’, allows for systems with voltages above 660V , where the voltage reference to theMPR2000 must be via a voltage transformer and the VT primary voltage is set with this function.

VT Secondary VoltageThis setti ng, range ‘Not Connected’ or 95V-660V in steps of 5v, with a default setting of ‘Not Conneted’,allows forsystems with voltages above 660V , where the voltage reference to the MPR2000 must be via a voltage transformerand the VT secondary voltage is set with this function.


Motor Full Load CurrentThis setting, range 1-2500 Ams in steps of 1 Amp upto 100 Amps and 5 Amps above, with a default setting of 100Amps, determines the normal running full load current of the motor and enables protective functions to be set in termsof percentage FLC and enables the MPR2000 to display running current in terms of percentage FLC.

CT PrimaryThis setting, range 1-2500 Amps in steps of 1Amp upto 100 Amps and 5 Amps above, determines the primary ratio forthe phase current transformers. When using motors with FLC up to 5 Amps which are direct connected (i.e. withoutCT's this setting should be set to 5 Amps).

E/F PrimaryThis setting, range 1-2500 Amps in steps of 1 Amp upto 100 Amps and 5 Amps above, determines the primary ratio ofthe core balance earth fault CT if used. If a residual connection of phase CT's is used this setting must be the same asfor the phase CT primary setting.

Earth Fault AlarmThis setting range 1-100% Inom in steps of 1%, with a default setting of 5%, specifies the level of earth fault currentbefore an alarm occurs.

Earth Fault Alarm DelayThis setting is used to select the time between an earth fault being registered and an alarm signal being activated.Range1-60 seconds in steps of 1s with a default setting of 10s.

Earth Fault TripThis setting range 1-100% Inom in steps of 1% , with a default setting of 10% specifies the level of earth fault currentbefore an trip occurs.

Earth Fault Trip DelayThis setting is used to select the time between an earth fault being registered and an trip signal being activated. Range0-2 Seconds in steps of 0.1 Seconds with a default setting of 0.5 seconds.

Current InhibitThis setting , range Off, or 400-1000% FLC in steps of 10%, with a default setting of ‘off’, determines the level atwhich the Earth Fault feature will be inhibited from operating.

Starting Method Not applicable to this “protection only” relay.

Notes The setting options for Aux 1 and Aux 2 output relays should always be set to alarm and Trip respectively.

9.3 Voltage Settings

Undervoltage SettingThis setting range 50-95% in steps of 1% with default setting of 80% of line voltage determines the pick up level of theUndervoltage protection. When the measured voltages reaches this level for the period equal to the UndervoltageDelay period a trip will be performed, unless the Undervoltage Restart feature is selected.

Undervoltage DelayThis setting range 0.2 - 10 seconds in steps of 0.1s with a default setting of 5s determines how long an Undervoltagecondition must be, before a trip occurs.

Overvoltage AlarmThis setting range 100-120% in steps of 1%, with a default setting of 115% of line voltage determines the pick upvoltage for the Overvoltage alarm function. When the measured voltage reaches this level and remains for 1 second analarm will occur.

Overvoltage TripThis setting range 100-120% in steps of 1%, with a default setting of 120% of line voltage determines the pick up levelfor the Overvoltage trip function. When the measured voltage reaches this level and is maintained for the OvervoltageTrip Delay a trip will occur.


Overvoltage Trip DelayThis setting range 1-100 seconds in steps of 1 second, with a default setting of 1 second determines how long anOvervoltage must be present before a trip will occur.

9.4 Current Settings

Maximum Start TimeThis setting with a range of 1 to 250 seconds in steps of 1 s with a default setting 10 seconds determines the time thatthe motor is allowed to take to complete it's starting sequence.

Number of StartsThe number of starts the motor will make can be limited by the MPR2000 from anywhere between the range 1 to 10 insteps of 1, with a default setting of 10.

Start PeriodThis specifies the time, within which the number of motor starts will be allowed to occur. Should the number of startsselected be exceeded the motor will be inhibited from starting for a pre-selected time specified by the Start InhibitTime value. The start period can be between the range of 1 to 60 minutes in steps of 1 minute, with a default setting of15 minutes.

Start Inhibit TimeThis details the time that must elapse before the motor can be restarted after previously exceeding the number of startsset within the start period. This is adjustable between the range of 1 to 60 minutes in steps of 1 minuts, with a defaultsetting of 15 minutes.

Undercurrent AlarmIf current falls the MPR2000 will sense this and an alarm will be signalled at a set percentage of FLC. This setting hasa range 10 - 90% in steps of 1% of FLC, with a default setting of 50%.

Undercurrent Alarm DelayLinked to the undercurrent alarm this function can be pre-set to determine how long an undercurrent below the settingcan occur before an alarm will be signalled. It may be set between the range of 1 and 60 seconds in steps of 1s, with adefault value of 2 seconds.

Undercurrent TripThis setting specifies below what undercurrent level the unit will trip. It is adjustable between the range of 10 and 90%of FLC in steps of 1%, with a default value of 40% of FLC.

Undercurrent Trip DelayThis sets a time between the unit registering an undercurrent level and the actual tripping of the unit. Adjustable by theuser between the range of 1 and 60 seconds in steps of 1s, with a default setting of 5 seconds.

Load Increase AlarmShould the load on the motor increase during operation the MPR2000 can sense this and signal an alarm. The pick uplevel is adjustable between the range of 60 and 150% of FLC and has a default setting of 120% of FLC, with a fixedtime delay of 5 seconds.

Low Set OvercurrentThis setting is not in service during starting. It can be set between the range of 100 and 500% in steps of 10% of FLCto afford the user a faster tripping time for overcurrent conditions than that available from the overload curve. Thedefault for this etting is 400% of FLC. This feature can also used to provide a fast operating definite time stallprotection after the motor is running.

Low Set DelayThis setting determines the time of the delay between the unit registering a low set overcurrent to it's alarm or trippoint. The setting is adjustable between the range of 0.5 and 10 seconds in steps of 0.5s, with a default setting of 2.0seconds.


High Set OvercurrentThis feature is normally enabled when the motor is being controlled by a circuit breaker rather than a fuse contactor.The High Set Overcurrent unit can be set between the range of 400 and 1200% in steps of 10% of FLC, with a defaultvalue of 800%.

High Set DelayUser set from the keypad, this setting determines the time between registering a High Set Overcurrent and an alarm ortrip being signalled. Adjustable between the range of instantaneous to 4 seconds in steps of 0.1s with a default settingof 'Instantaneous'.

Overload SettingPre-settable overload setting range 60 to 130% in steps of 1% of FLC, with a default and P&B Engineering'srecommended setting of 105% of FLC. For further information refer to section 'MPR2000 Thermal OverloadProtection'

Thermal Capacity AlarmUser settable to specify a thermal capacity alarm value between the range of 50 and 99% in steps of 1% of capacity,with a default setting of 80%.

t6x TimeThis setting specifies the time the MPC2000 will take to trip at 6 times FLC and determine the basic thermalcharacteristic. This time range 0.5 and 120 seconds, with a default setting of 10 seconds. For further information referto section 'MPR2000 Thermal Overload Protection'

Hot/Cold RatioAdjustable between 20 and 100% in steps of 1%, with a default setting of 50%. For further information refer to section'MPR2000 Thermal Overload Protection'

Cool Time FactorThis setting specifies the time factor at which the running motor will cool down once it has been stopped. Adjustablebetween the range of 1 to 15 in steps of 1 times the heating constant with a default setting of 5. For further informationrefer to section 'MPR2000 Thermal Overload Protection'.

Stall Time FactorTo cater for stalling on starting particularly when the motor locked rotor characteristic is close to that normally seenduring a start. To achieve adequate protection the thermal characteristic may be switched to a lower value. The featureis activated by connecting a speed switch between terminals 32 and 9 which enables or disables the stallingcharacteristic which is adjustable between the range of 20 and 100% in steps of 1% of the thermal trip times, with adefault setting of 50%.

Overload Reset MethodWith the exception of the Thermal Overload Protection all of the MPR2000 protective functions can be disabled.When set to Auto the Overload trip will be self-reset when the thermal capacity has cooled to below 50% of the motorcapacity without the need for an operator reset. When set to Hand the fault will not reset until an operator reset isperformed but only if the thermal capacity used has reduced to 50%.

Aux 1 Designate, Alam, Contactor A, Contactor B, Run.

Aux 2 Designate Trip, Trip Fail Safe, Contactor A, Contactor B.


Unbalance CurrentThis user adjustable setting allows the specifying of the amount of current unbalance that the motor can tolerate. Thiscan be set between the range of 10 and 40% in steps of 1% of FLC, with a default setting of 15%.

Current Unbalance Time ConstantThis setting determines the time that the current may be unbalanced before a trip is initiated. The setting is adjustablevia the keypad. The value To has the range 20 - 120 seconds in steps of 1 second, the default value being 30 seconds,and it refers to the inverse slope of the time verses %unbalance characteristic which has a reference pointcorresponding to an Unbalance of 10%.

The unbalance trip function is an inverse-time characteristic of the form

T = 100 To where To = time constant setting (uB)2 uB = The unbalance in %.

However the minimum trip time is 1 second and the minimum pick up is the same as the setting “unbalance Current”above.

5 %5 % 20 %20 %

0.10.1

11

1010

40%40%

55 1010 2020 3030 4040 5050 100100 200200

% UNBALANCE% UNBALANCE

LOWERLOWER UPPERUPPERLIMITLIMIT LIMITLIMIT

EXAMPLEEXAMPLE

To=120To=120

To=20To=20 To=70To=70

2020

7070

120120


9.5 Temperature Settings

RTD/ThermistorThis determines whether Resistance Temperature Detectors or Thermistor are being used for temperature monitoring.In addition to this setting a change in the setting of an internal group of dip switches is required, refer to notes given inthe MPR Measured Inputs section.

Thermistor TypeThis setting, range PTC or NTC is only applicable if Thermistor is set above. It determines whether positive ornegative coefficient Thermistor are being used.

Channel 1 Alarm This determines the resistance level at which an alarm will occur.



Channel 1 Trip This determines the resistance level at which an trip will occur.



9.6 Tripping/Alarm Options

This page contains the following settings for each protective function incorporated in the MPR2000.

TripThis determines whether operation of the protective function cause a trip to the motor or not. This can be applied toan alarm such that an alarm can be made to trip.

AlarmThe option, whether the protective functions cause an alarm to occur and is applicable to both alarm and trip protectivefunctions.

Auto ResetThis allows self resetting of a fault or alarm once the fault is no longer present. In the case of Thermal Overload or TooMany Starts faults the self reset will not occur until the capacity has cooled to 50% or the Starts inhibit period haspassed.

Panel ResetThis allows reset of a latched fault by pressing the reset button on the MPR2000 functional keypad, irrespective of thestate of the Authorise input. If this feature and the Auto Reset functions are disabled the only way to reset the faultlocally is by use of the Reset button when the Authorise input is closed.

The above options are provided individually for all of the MPR2000 protective functions:


9.7 MPR2000 Setting Pages Summary

The diagrams that follow summarise all of the MPR2000 Setting and Data pages and gives the factory default settingfor all settings.COMMUNICATION SETTINGS SETTING RANGE DEFAULT

Drive Number 1 - 320 0Baud Rate 110,300,1200,2400,4800,9600 9600Serial Link No. 1 - 33 33Fast Scan Anal 1 0 - 201 0Fast Scan Anal 2 0 - 201 1Fast Scan Anal 3 0 - 201 2Fast Scan Update 0-30s 0

SYSTEM PARAMETER SETTINGS

Line Voltage 100v-22kv 415vVT Primary Not Connected, 100v-22kv Not ConnectedVT Secondary " " , 95-660v " "Motor FLC 1-2500A 100ACT Primary 1-2500A 100AE/F CT Primary 1-2500A 100AEarth fault Alarm 1-100% Inom 5% Inom " " " Delay 1-60 Sec 10 secEarth Fault Trip 1-100% Inom 10% Inom " " " Delay 0-2 Sec 0.5 SecCurrent Inhibit off, 400-1000% FLC offStart/Stop Signal Momentary, Maintained MomentaryStarting Method DOLNR,Star/Delta,Reversing DOLNR

2 Speed,Valve ControlMax Time in Star 1-60 Sec 10 SecTransition Time 0.05-2.0 Sec 0.2 SecStar to Delta at 75-200% FLC 150% FLCLow Speed FLC 1-2500A 10ALow Speed t6X 0.5-120Sec 10 SecDesignate Aux 1 Alarm,Contactor A, Contactor B, Run AlarmAux 1 Delay 0-120 Sec 0Designate Aux 2 Trip, Trip Fail Safe, Contactor A, Trip

Contactor BAux 2 Delay 0-120 Sec 0Protection Only Yes Yes

VOLTAGE SETTINGS

Undervoltage Setting 50-95% 80%Undervoltage Delay 0.2-10 Sec 5 SecUndervoltage Restart Yes,No NoUndervoltage Restart Delay 0.2-120 SecondsOvervoltage Alarm 100-120% 115%Overvoltage Trip 100-120% 120%Overvoltage Trip Delay 1-100 Sec 1 Sec


CURRENT SETTINGS

Maximum Start Time 1-250 Sec 10 SecNumber of starts 1-10 10Start Period 1-60 Min 30 MinStart Inhibit Time 1-60 Min 30 MinUndercurrent Alarm 10-90% FLC 50%Undercurrent Alarm Delay 1-60 Sec 2 SecUndercurrent Trip 10-90% FLC 40$Undercurrent Trip Delay 1-60 Sec 5 SecLoad Increase Alarm 60-150% FLC 120%Low Set Overcurrent 100-500% FLC 400$Low Set Overcurrent Delay 0.5-10 Sec 2.0 SecHigh Set Overcurrent 400-1200% FLC 800%High Set Overcurrent Delay Inst-4 Sec InstOverload Setting 60-130% FLC 105%Thermal Capacity Alarm 50-99% 80%t6x Time 0.5-120 Sec 10 SecHot/Cold Ratio 20-100% 50%Cool Time Factor 1-15 5Stall Time Factor 20-100% 50Overload reset Method Auto,Hand HandUnbalance Current 5-40 15%Current Unbalance Time Constant 20-120 Sec 30 Sec

TEMPERATURE SETTINGS SETTING RANGE DEFAULT

RTD/Thermistor RTD/Thermistor RTDThermistor Type PTC,NTCChannel 1 Alarm 0-200 deg C or 100-240 or 100-30,000 ohm 140 deg CChannel 2 Alarm 0-200 deg C or 100-240 or 100-30,000 ohm 140 deg CChannel 3 Alarm 0-200 deg C or 100-240 or 100-30,000 ohm 140 deg CChannel 1 Trip 0-200 deg C or 100-240 or 100-30,000 ohm 150 deg CChannel 2 Trip 0-200 deg C or 100-240 or 100-30,000 ohm 150 deg CChannel 3 Trip 0-200 deg C or 100-240 or 100-30,000 ohm 150 deg C

TRIPPING/ALARM OPTIONSFunction T A AR PR R

Maximum Start Time D E D E EToo Many Starts D D D E EUndercurrent Pre-Alarm D E D E EUndercurrent Trip D D D E ELoad Increase Alarm D E D E ELow Set Overcurrent E E D E EHigh Set Overcurrent D D D E EThermal Pre-Alarm D E D E EThermal Trip E E D E EUnbalance Alarm D E D E EUnbalance Trip E E D E EUndervoltage Trip D E D E EOvervoltage Pre-Alarm D E D E EOvervoltage Trip E E D E EPhase Loss E E D E EPhase Sequence E E E E ETemp 1 Channel Pre-Alarm D D D E ETemp 1 Channel Trip D D D E ETemp 2 Channel Pre-Alarm D D D E ETemp 2 Channel Trip D D D E ETemp 3 Channel Pre-Alarm D D D E ETemp 3 Channel Trip D D D E EEarth Fault Pre-Alarm D E D E EEarth Fault Trip E E D D DSerial Port Failure D D E E EInternal Relay Failure D E D D DEmergency Stop D D D E EControl Circuit Open D D D E EWelded Contactor D D D E EExternal Fault 2 D D D E EExternal Fault 3 D D D E EE=Enabled D=Disabled, T=Trip, A=Alarm, AR=Auto-Reset, PR=Panel Reset, R=Remote Reset


9.8 MPR2000 Data Pages Summary

The following menus can be displayed by the Data Page Key. Under each menu title is data displayed on the MPR2000on that data page. These are seen by pressing the Line Up and Line Down Keys.

MEASURED DATA

VP1, VP2, VP3 Volts Total Real Power WattsVL1, VL2, VL3 Volts Total VA Power VAI1, I2, I3 Amps Power Factor %E/F Current AmpsR1, R2, R3 OhmsT1, T2, T3 RTD

CALCULATED DATA

Motor Load %Thermal Capacity %Time to Trip Min then SecTime to start Min then SecUnbalance Current %

LOGICAL INPUTS

Drive Status Available/Unavailable/RunningSpeed Switch Open=high speed/closed=low speedAuthorise Key Open=locked/closed=unlockedEmergency Stop Closed=run enable/open=stopExternal Fault 2 " " " " "External Fault 3 " " " " "

STATISTICAL DATA

Total Run Time HoursTotal # of startsTotal # of TripsLast ST. Period SecsLast ST. Peak I Amps

FAULT DATA

LAST TRIP DescriptionLAST ALARM DescriptionFAULT I1,I2,I3 AmpsFault IO AmpsFault V1,V2,V3 Volts

10. MPR2000 Communications

The MPR2000 in addition to its very comprehensive protection has been equipped with a very powerful datacommunications system. The relay provides high speed data acquisition to supervisory computers to form a completemotor management system. Each MPR2000 can be connected to an isolated data highway using RS485communications. Up to 32 MPR2000 units can be connected to each data highway.

For further information on the communication of the MPR2000 phone us for our booklet atManchester 0161-230-6363.


11. MPRSET Software.

All of the MPR2000 setting parameters mentioned above can be viewed and changed through the use of the MPRSETSoftware offered by P & B Engineering. It is designed to configure large numbers of units quickly as well as storingand printing the MPR2000 setting parameters.

For further information on the communication of the MPR2000 phone us for our booklet atManchester 0161-230-6363.

12. MPR2000 Flash/Constant Messages

The following Flash and Constant messages are displayed by the MPR2000 LCD :

DATA SAVED OK This Flash message is displayed after a setting parameter has been correctly storedto the EEPROM memory

UNAUTHORISED ACCESS If an attempt is made to change or store a setting parameter whilst the Authoriseinput is open this Flash message is displayed. This message will also be displayed if an attempt is made to reset a faultfor which the panel reset has been disabled.

RESET THERMAL CAPACITY ??? This Flash message is displayed when the reset key is pressed if theAuthorised input is closed and if the reset button is pressed whilst the message is displayed the Thermal Capacity willbe set to Zero.

THERMAL CAPACITY RESET PERFORMED This Flash message is displayed after the aboveoperation has been successfully performed.

SELF TEST PASSED This Flash message is displayed if the 'Run Self Test' function of the Test/MaintenanceOptions is successfully performed.

SELF TEST FAILED ERROR CODE 32 This Flash message is displayed if an error has been foundduring the operation of the 'Run Self Test' function in the Test/Maintenance Options.

ALARM 'XXXX' This is a constant message which identifies which Alarm has operated and is displayedwhen the Alarm LED is illuminated.

Fault 'XXXX' This is a constant message which is identifies which Fault has operated and is displayedwhen the Fault LED is illuminated.

13. MPR2000 Internal Test Routines

In addition to conventional hardware and software watchdog routines, the MPR2000 has been designed to include itsown internal test routines and watchdog. When the Test key is pressed the Test/Maintenance Menu will be displayed:-

Run Self TestProgram VersionStore Enable Default SettingsReset & Store Statistical Data

These functions can only be performed if the Authorise input is closed, and operate as follows:Run Self Test This option checks all the monitored hardware and software routines displaying the message "SELFTEST PASSED" when completed successfully. Should this check fail then the message "SELF TEST FAILED" willbe displayed including an error code. The Internal Error LED will be illuminated and if enabled in the Tripping/AlarmOptions the unit will trip or alarm. The error code should be noted down and reported to P&B Engineering beforereturning the unit for repair. A minimum period of 20 seconds should be allowed after aux power is applied beforecarrying out a self test.


Program Version This gives the version of the software employed in your unit and should be quoted in allcorrespondence.

Store Enable Default Settings This will allow the user to reset the unit to the original factory set default settingsbefore any customer changes were made. This option should be used with care as all previous data will be lost.Pressing of the STORE and SET PAGE keys simultaneously will affect this procedure.

Reset & Store Statistical Data This allows the user to reset all statistical data and store at the reset value. Caremust also be taken when using this option, as all previous statistical data will be lost when reset. Pressing of the DATAPAGE and RESET keys simultaneously will affect this procedure.

14. MPR2000 Fault Finding

This procedure details some of the more common faults which may cause the MPR2000 to not operate as required.This is usually due to incorrect settings or logic and will hopefully assist to rectify the situation.

Check all connections at the rear of the unit have been made correctly.

Switch on the MPR2000 and ensure that the 'Power On' LED is illuminated. If not check the customer system.

If the motor starts but the MPR2000 alarms immediately, check the following:-

Ensure 'System Parameter Settings' and 'Tripping/Alarm Options' are correct.Ensure correct temperature measurement device has been selected, i.e. Thermistor or RTD.Ensure that the RTD inputs have been earthed. These are terminals 11, 12 and 54.(See Section 4.)

When selecting RTD PT100 the 100 Ohm resistance refers to the resistance at zero temperature. Ensure thenormal working temperature figure is added to this value. Usual setting approximately 140 Ohm.

•If selecting Thermistor set correct type, i.e. +ve or -ve.

•Check that the unit passes the 'Self Test Program'.

•When using the MPR2000 with a single phase input; special care needs to be given to the System Parameter Settingsto obtain correct results. In particular the Line Voltage parameter should be set at 1.732 times the expected linevoltage, e.g.

11KV system; set line voltage at 11Kv x 1.732 = 19KVThe VT Primary and VT Secondary values are set normally, i.e. VT Primary = 11KV VT Secondary =110VFor Low Voltage systems, using for example a 240V phase to neutral input, the line voltage should be set to415V.

If the unit still will not operate or still keeps alarming and has passed its self test, then seek further assistance from ourapplication help desks at Manchester 0161- 230-6363.


15. MPR2000 Thermal Overload Protection

MPR2000 Thermal Operating Curves

The curves shown are the time/current operatingcharacteristics for the MPR2000 Thermal Overloadprotection.

Curve 1 :Cold CurveOverload Setting =105%

Curve 2 :Hot CurveOverload Setting =105%Running From 100% FLCHot/Cold Ratio = 80%

Curve 3 : Hot CurveOverload Setting:=105%Running From 100% FLCHot/Cold Ratio = 50%

Curve 4 : Hot CurveOverload Setting:=105%Running From 100% FLCHot/Cold Ratio = 20%

Explanation

The MPR2000 simulates the thermal condition of themotor by means of a thermal register. The heating of theregister is related to the square of the largest of the threeline currents. The rate of cooling of the thermal registeris directly related to the rate of heating. The value ofthe thermal register is called thermal capacity and it isused to simulate motor temperature.

100 percent thermal capacity means the motortemperature has reached the maximum allowed and isthe level at which an overload trip will occur.

When the motor is stopped for a long period of time thethermal capacity used is zero, this is known as the 'coldcondition', and the motor has 100 percent of it's thermalcapacity available for heating before a trip will occur.

When a motor starts and is running it's temperatureincreases, after running at normal FLC for a period of time the motor will have reached a hot condition and alower value of thermal capacity will be available.

The Hot/Cold Ratio setting determines the amount of available thermal capacity for a motor running at FLC i.e. hotcondition, this is set as a percentage ratio of the amount of thermal capacity available at the cold condition which isalways 100%.

The thermal capacity available for a motor running at normal FLC i.e. Hot condition is the Hot/Cold Ratio setting. Forexample if the Hot/Cold ratio setting is 60% and the motor has been running at normal FLC for some time the amountof thermal capacity available is 60% then the amount displayed by the MPR2000 is the amount used which is 100 - 60= 40%.

Providing the motor running current does not exceed the overload setting ( 105% FLC default) the thermal capacityused will never reach 100% and therefore will never trip on overload

1 2 3 4 5 6 7 8 9 10 15

Multiples of FLC

200

100

t

10

0.01

0.1

0.2

1

2

20

0.02


When the running current exceeds the overload setting the thermal capacity will eventually reach 100% and trip themotor. The time taken depends on the present value of thermal capacity used and the t6x setting, which is set as thetime to trip for a motor in a cold condition when the current is at 6 times the motor rated FLC. The heating constant isequal to t6x setting x 32 seconds.

The expected 'Time To Trip' is the time it will take to reach 100% thermal capacity at the present running current levelis calculated and can be displayed by the MPR2000.

If a motor speed switch is installed and connected to the MPR2000 it is then possible to decrease the thermal trip timein the range of 20-100% of the set hot & cold curve operating times when the motor stops rotating, i.e. stalled.

After a thermal overload trip it is not possible to reset the fault and restart the motor until the amount of thermalcapacity available has reduced to 50%.

The cooling time constant of a motor, i.e. the time taken for its temperature to drop is usually much longer than theheating constant. The Cool Time Factor setting determines the rate of cooling and is set as a ratio of the heating timefactor between 1 and 15 times the heating factor. The higher the value of this setting the longer it will take for thethermal capacity to reduce to the 50% level required to enable a restart.

The MPR2000 calculates the expected 'Time To Restart' and displays this value within the 'Calculated Data' page.

For testing purposes the resetting of the thermal capacity register to 0% can be manually performed only if the'Authorise Key' input is enabled, and by pressing the Reset key which will cause the display to show 'Reset ThermalCapacity ???'. If the Reset key is pressed again whilst this message is displayed i.e. within 1 second the register will bereset to 0%.

The settings for 'Thermal Overload', 't6x', 'Hot/Cold Ratio' and 'Cool time Factor' should be established from dataobtained from the motor manufacturer however should it not be possible then the default settings for these are typicalsettings for normal induction motors and may be used at the users own risk. The t6x setting can be set to 10% abovethe normal run up time, which can be established after the unit is installed by starting the motor and noting the 'LastStart Time' available in the MPR2000 'Statistical Data page.

The present value of thermal capacity is stored in the EEPROM non-volatile memory during a failure or disconnectionof the auxiliary supply. Upon restoration of the supply the former value will be maintained.

Referring to the MPR2000 Thermal Operating curves shown, the operating time at a certain multiple of motor FLC canbe calculated for a particular motor by multiplying the corresponding time taken from the vertical scales by the settingof t6x.

Example ApplicationAs an example of applying the MPR2000 Thermal Overload protection to a motor let us establish the settings for aparticular motor having the following characteristics:

Rating: 100KwSystem Volts 415 VoltsFLC: 180 AmpsCT ratio 200/5 AmpsStarting DOLStart Time 8 sec @ 6xFLCCold Withstand 22 SecondsHot Withstand 11 Seconds

The figures for Line Voltage, Motor FLC and CT Primary should be entered. For the Overload setting we will use thedefault setting of 105%.

The t6x setting must now be calculated. This is set as the time taken to trip at 6 x FLC for the Cold Starting conditionand is set in conjunction with the Hot/Cold Ratio setting.

For the above typical motor the Hot Withstand time is 11 seconds, the Cold Withstand is 22 seconds, therefore theHot/Cold ratio is calculated as 11/22 x 100 = 50%.


As a general rule the relay should be set to trip at no closer than 80% of the Thermal withstand Time, which in thiscase is 80% x 22 sec = 17.6 secs. Therefore set t6x = 17 secs and set Hot/Cold Ratio = 50%

From the standard MPR2000 Thermal Operating Curves the Cold curve trip times can be calculated by multiplying thesetting t6x and the factor 't' for various multiples of FLC i.e.:

Multiple of FLC 1.5 2.0 3.0 4.0 5.0 6.0Trip time (secs) 366 175 71 39 24 17

From the Hot Curve for Hot/Cold Ratio =50% trip times can be calculated as follows:

Multiple of FLC 1.5 2.0 3.0 4.0 5.0 6.0Trip Time (secs) 230 102 40 22 14 9.5

The curves shown on the right are theactual curves for the calculated figuresand show that the setting has beenchosen to provide close protection totake advantage of the motors capabilityand allow the possibility of animmediate restart from the Hotcondition. However alternative settingscan be made to provide faster trippinglimited by the conditions of ensuringthe motor can run up speed underhealthy conditions without tripping.

If the Hot to Cold ratio is set to a figureother than the 3 standard curves drawn,then either the formula quoted belowcan be used or an approximation of theHot curve can be drawn to calculate triptimes.

(Starting/Cold Condition)

tc = 32.a.loge ( p2 ) -------- p2 - s2

where 'p' is multiple of motor FLC (perunit value)

's' is overload setting in perunit value e.g. 105%

'a' is setting of t6x in seconds 'tc is the operating time in seconds

(Running/Pre-load Condition)

tc = 32.a.loge ( p2 - (1-H/C)(IL)2 ) --------------------

p2 - s2

where 'IL' is the steady state load prior to overload condition divided by motor FLC, e.g. if motor is running at FLC,IL=1.

'H/C' is the hot/cold ratio in per unit value e.g. 40% hot to cold ratio = 0.40.


The cool Time Factor is factory set at 5 unless specific information is available from the motor manufacturer tocalculate the actual setting it is recommended that the default setting is used.

With regard to current unbalance protection the pick up time default setting is 15% and trip time is 30 seconds. Thisfigure should be set to the motor requirements if the Negative Phase Sequence withstand can be obtained. Formula forcalculating the unbalance setting can be obtained from P & B Engineering on request.

Further help on the application of thermal overload protection by ringing P & B Engineering at Manchester on 061 2306363.


16. MPR2000 Installation16.1 Casing

The MPR2000 is supplied in a UK manufactured industry standard drawout case for flush mounting on the front of themotor starter or circuit breaker cubicles.

Clearance

25 min166.2540

155.5

PUSH BUTTONPROJECTION 10mm

208

178.5

9645

10

102

NOT SHOWN TO SCALE

178Required to open case

M4 STUDS

2

23

PANEL CUT OUT FLUSHMOUNTING FIXING DETAILS

4 HOLES 4.3mm DIAMETER

168 158

156

202Min28 NOTE Minimum gap between vertical

spacing is required in order to

withdraw relay from the case above.


16.2 MPR2000 Terminations

All terminations to the MPR2000 are situated to the rear of the unit, and are suitable for use with standard crimpedconnectors.

The rear terminal block accepts both pre-insulated screw and push-on blade type connectors. Each terminal has 1screw type and 2 blade type connectors.

Screw: Each connection uses a 4mm (M4) screw outlet and accepts standard L-shaped ringtype connectors designed for 4mm screws.

Blade: Each connection facilitates 2 pre-insulated push-on blades 4.8mm wide 0.8mm thickcomplying with BS5057.

Combinations: Each terminal will accept either;2 ring type connectors

or 2 push-on blade type connectorsor 1 ring type connector & 1 push-on blade type connector

The following diagram shows the position of the terminals.

1

3

5

7

9

11

13

15

17

19

21

23

25

27

2

4

6

8

10

12

14

16

18

20

22

24

26

28

Earth

Rear terminal block connections.

Each terminal

1 screw &2 spade29

31

33

35

37

39

41

43

45

47

49

51

53

55

30

32

34

36

38

40

42

44

46

48

50

52

54

56

All information subject to change without notice

Publication number MPR2000 Issue H


17. Fast Scan Analogue Data

The Fast Scan Analogue 1,2 and 3 can have the following data assigned to them to be read back to the PCX:-

Address Data Represented. Address Data Represented.0 Current in I1 27 Hardwire Command1 Current in I2 32 Total run time2 Current in I3 33 Total starts3 Current in I0 34 Total trips4 Voltage in VP1 35 Thermal capacity5 Voltage in VP2 36 Trip fault number6 Voltage in VP3 37 Logic status7 Voltage in VL12 38 Pre trip I18 Voltage in VL23 39 Pre trip I29 Voltage in VL31 40 Pre trip I3

10 Drive Status 41 Pre trip I011 Trips 42 Pre trip VP112 Alarms 43 Pre trip VP213 Time to trip 44 Pre trip VP314 Time to start 45 Last start period15 Average RMS current 46 Last start peak current16 Motor load 47 Pre trip Power17 Unbalance 48 Fault status18 Alarm fault number 70 RTD419 Frequency 71 RTD520 Resistance(4) 86 Dip Switch23 Phase Sequence 92 Average Power24 Control Input 1 93 Power Factor25 Control Input 2 94 Power VA26 Control Input 3

18. Changes To The Manual.

From Issue G.Undercurrent is clarified, a new lower limit of 5%.

From Issue F.Earth Fault Display lower range is noted. (Section 5.4.)Accuracy of Power for small motors is noted. (Section 5.6.)Fast Scan Update Time Added. (Section 9.1.)

From Issue EClarification of the external instrumental earthing inputs on pins 11,12,54. Notes are changed in section 4., 5., and 14.

From Issue DFLC changed to Inom with respect to Earth Fault Trip and AlarmPower Indication is now no longer an option.5th RTD channels Pin Out Numbers changed from 52, 53 and 51 to 53,51 and 52.

mpr2000 - home - p&b -- p&b · pdf fileissue i mpr2000 digital motor protection relay...

Documents