multipurpose brake - · pdf filethis prevents excess motor heating. the multipurpose brake,...

Multipurpose Brake

Installation & Operating Manual

7/02 MN802

Table of Contents

Table of Contents iMN802

Section 1General Information 1-1. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Multipurpose Brake Operation 1-1. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Additional Information 1-2. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Selection of Operating Mode 1-2. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Safety Notice 1-4. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Limited Warranty 1-5. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Section 2Receiving & Installation 2-1. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Receiving, Inspection and Storage 2-1. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Quick Reference Chart 2-1. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Installation 2-2. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Considerations 2-2. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Checklist 2-2. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Procedure 2-3. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Control Wiring Diagrams 2-4. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Basic Mode 2-4. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Master Mode 2-6. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Pre-Stop Mode 2-8. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Section 3Startup and Maintenance 3-1. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Overview 3-1. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Initial Adjustments 3-1. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Operation Checks 3-1. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Maintenance 3-1. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Section 4Troubleshooting 4-1. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Preliminary Checks 4-1. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Control Board Checks 4-2. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Power Cell Checks 4-3. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Section 5Specifications and Product Data 5-1. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Identification 5-1. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . General Specifications 5-2. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Control Wiring Diagrams 5-4. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Size 16A-80A 5-4. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Size 135A - 600A 5-5. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Torque and Wire Specifications 5-6. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Mounting Dimensions 5-6. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Dimensions / Panel Layout 5-7. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Size 16A to 30A 5-7. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Size 55A and 80A 5-8. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Size 135A and 250A 5-9. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Size 420A and 600A 5-10. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

ii Table of Contents MN802

Section 1General Information

General Information 1-1MN802

Multipurpose Brake OperationThe Baldor Multipurpose brake provides smooth frictionless braking to standard threephase AC induction motors. The brake can be used with a standard magnetic starter orwith a solid state reduced voltage starter and contactor. Braking is accomplished byapplying an adjustable DC current to the motor windings. This current sets up a stationarymagnetic field in the motor. The magnetic field causes the motor to come to a smoothfrictionless stop. The brake electronically senses when the motor has stopped andremoves the DC current (disengages the brake). (See Figure 1-1).

AC motors, when turned off, have residual magnetism that causes voltage to be presentinside the motor. Large surge currents could occur if DC is applied to the motor beforethe voltage in the motor reaches a safe level. The traditional method of a fixed time delaydoes not allow for the variations of motors or changes in a motor under different loadconditions. Baldor’s dynamic brake monitors the voltage in the motor and waits for themotor voltage to drop to a safe level before applying DC braking.

The Multipurpose Brake verifies that the DC contactor has opened before allowing the ACcontactor (starter) to close. Zero speed sensing will quickly shut off the DC brake whenthe motor stops. This prevents excess motor heating.

The multipurpose Brake, with its three operating modes and zero speed sensing, makesit flexible for many applications. Sensing motor voltage and checking for the DCcontactor opening eliminates the most common failures of solid state brakes caused byhigh surge currents resulting in blown AC starter fuses and welded contacts of the ACcontactor.

Figure 1-1 Typical Operation

A B C D E t

Motor VoltageSafe Level

MotorVoltage

Motor Speed

Motor Speed

Motor Voltage VACRMS

DC Voltage

Legend

A - Motor AC contactor opens.B - Motor voltage decreases and motor begins to slow down.C - DC braking begins after a safe motor voltage level is reached.D - The control senses the motor has stopped.E - DC braking is turned off.


1-2 General Information MN802

Additional Information Stopping TimeDepending on the load, the Baldor dynamic brake can stop the motor faster than themotor will start (at 460VAC). However, this can cause damage to the motor or the drivenmachinery.

Motor SizingEach stop (with the dynamic brake) should be treated as a start for calculating duty cycleand for sizing the motor. The brake does not have a duty cycle limit.

Holding BrakeA solid state brake is not a substitute for a mechanical holding brake.

Brake SizingUse the motor FLA and operating voltage to size the brake. All Baldor MultipurposeBrakes can be used on high inertia loads.

Selection of Operating ModeThree operating modes are available in the Multipurpose Dynamic Brake control. Theseoperating modes define sequence of braking cycle, connections of control and powerdevices, setting and adjustments. Selection of Operating Mode is done by setting Dipswitch (S1) on the Brake Control Board. Available operating modes include:

� Basic Mode

� Master Mode

� Pre-stop Mode

Basic ModeBasic Mode features automatic sensing of motor terminal line voltage. Brake activatesautomatically when voltage on the motor terminal decreases to a save level. Separatemotor starter controls govern start and stop cycle. Brake release function providesimmediate means of opening the brake contactor. This feature adds operational flexibilityand a safety factor as well.

Figure 1-2 Functional Diagram – Basic Mode

Full Voltage Non-Reversing

Controller

Start/StopPush Buttons

Motor

Brake

Optional Emergency Stop Push Button

and Brake Release Switch



Master ModeIn Master mode, the Brake controls the motor starter operation through the MotorInterlock. Motor Start and Stop pushbuttons are wired to the Brake Control Board.Master Mode initiates the brake cycle when the Stop or Emergency Stop push buttonsare pressed. Extended brake times allows the motor to come to a controlled full stopbefore the brake shuts off, thus avoiding uncontrolled coasting. Also, Master Modeallows the Jog function. Jog allows conventional jogging push button control of the motorstarter contactor with motor coasting with brake action disabled. Brake release functionprovides immediate means of opening the brake contactor. This feature adds operationalflexibility and a safety factor as well.

Figure 1-3 Functional Diagram – Master Mode


Controller

Start/Stop/JogPush Buttons

Motor

Brake

Emergency Stop Push Buttonand Brake Release Switch

Pre-stop ModeIn Pre-stop mode, the Brake controls the motor starter operation through the MotorInterlock. Motor Start and Stop pushbuttons are wired to the Brake Control Board.Pre-stop Mode initiates the brake cycle when the Start push button is pressed. TheBrake cycle includes opening of a motor starter contactor, sensing the safe voltage level,closing the brake contactor, injecting DC current into motor winding (brake action), thensensing zero speed and opening the brake contactor. The sequence ensures that themotor is first stopped before starting the motor. Stop push button open the motor startercontactor and motor coast to stop. Zero speed sensing followed by brake shut offeliminates unnecessary heat in the motor winding.

Figure 1-4 Functional Diagram – Pre-stop Mode


Controller

Start/StopPush Buttons

Motor

Brake

Emergency Stop Push Buttonand Brake Release Switch


Safety Notice This equipment contains voltages that may be as high as 600 volts! Electrical shock cancause serious or fatal injury. Only qualified personnel should attempt the start-upprocedure or troubleshoot this equipment.

This equipment may be connected to other machines that have rotating parts or partsthat are driven by this equipment. Improper use can cause serious or fatal injury. Onlyqualified personnel should attempt the start-up procedure or troubleshoot this equipment.

PRECAUTIONS

WARNING: A solid state Multipurpose brake is not suitable for use as amechanical holding brake. Because the solid state Multipurposebrake requires AC power for braking, if power is interrupted nobraking is provided. This can be hazardous to personnel orequipment.

WARNING: Do not touch any circuit board, power device or electricalconnection before you first ensure that power has beendisconnected and there is no high voltage present from thisequipment or other equipment to which it is connected. Electrical shock can cause serious or fatal injury.

WARNING: Be sure that you are completely familiar with the safe operation ofthis equipment. This equipment may be connected to othermachines that have rotating parts or parts that are controlled bythis equipment. Improper use can cause serious or fatal injury.Only qualified personnel should attempt the start-up procedure ortroubleshoot this equipment.

WARNING: Be sure the system is properly grounded before applying power.Do not apply AC power before you ensure that all groundinginstructions have been followed. Electrical shock can causeserious or fatal injury.

Caution: To prevent equipment damage, be certain that the electrical serviceis not capable of delivering more than the maximum line shortcircuit current amperes listed for the control rating.

Caution: Do not “Megger” test the motor while it is connected to the brake.Failure to disconnect motor will result in extensive damage to thebrake. The brake is tested at the factory for high voltage / leakageresistance as part of Underwriter Laboratory requirements.

Caution: Do not connect power factor correction capacitors to motorterminals or brake output terminals.


Limited Warranty

For a period of two (2) years from the date of original purchase, BALDOR willrepair or replace without charge controls and accessories which ourexamination proves to be defective in material or workmanship. Thiswarranty is valid if the unit has not been tampered with by unauthorizedpersons, misused, abused, or improperly installed and has been used inaccordance with the instructions and/or ratings supplied. This warranty is inlieu of any other warranty or guarantee expressed or implied. BALDORshall not be held responsible for any expense (including installation andremoval), inconvenience, or consequential damage, including injury to anyperson or property caused by items of our manufacture or sale. (Somestates do not allow exclusion or limitation of incidental or consequentialdamages, so the above exclusion may not apply.) In any event, BALDOR’stotal liability, under all circumstances, shall not exceed the full purchaseprice of the control. Claims for purchase price refunds, repairs, orreplacements must be referred to BALDOR with all pertinent data as to thedefect, the date purchased, the task performed by the control, and theproblem encountered. No liability is assumed for expendable items such asfuses.

Goods may be returned only with written notification including a BALDORReturn Authorization Number and any return shipments must be prepaid.

Section 2Receiving & Installation

Receiving & Installation 2-1MN802

Receiving, Inspection and StorageWhen you receive your control, there are several things you should do immediately.

1. Observe the condition of the shipping container and report any damageimmediately to the commercial carrier that delivered your control.

2. Verify that the part number of the control you received is the same as the partnumber listed on your purchase order.

3. If the control is to be stored for several weeks before use, be sure that it isstored in a location that is clean, dry and free from corrosives andcontaminants. Storage temperatures must not exceed 140°F (60°C).

Quick Reference Chart

� � � � � �

��

��

MAG1 MAG2 TIME

��

Bra

ke O

N

Mot

or R

un

Bra

ke R

eady

Bra

ke L

ogic

Pow

er O

N��

1 2 3 4 5 6 7 8 9 10��

��

Brake Control Board (BRDT-B2)LED Indicators:

PWR On indicates 115VAC input is present

RDY On indicates Brake ready. Flashing indicates error detected.2 flashes- Improper line voltage3 flashes- Motor contactor (M) failed to open4 flashes- Brake contactor (BC) failed to open5 flashes- Improper line frequency

RUN On indicates M contactor is closed or enabled(TB1 terminals 7 and 8 closed).

BRK ON indicates brake contactor (BC) is closed.

Switch (S1):

S1-1 S1-2 Brake Timer Range

OFF OFF 1 to 17 secondsOFF ON 15 to 32 secondsON OFF 30 to 47 secondsON ON 45 to 62 seconds

S1-3 S1-4 Brake Operating Mode

OFF ON Master Brake ModeON OFF Pre-Stop Brake ModeON ON Basic Brake Mode

S1-5 Zero Speed Sensor Disable

OFF Brake zero speed sensor ONON Brake zero speed sensor OFF

S1-6 Brake Status and Reset

OFF Brake is operationalON Brake is disabled and reset

Adjustments:

Brake Magnitude Adjustment (0-100%)Adjustment for brake torque with a motor stop pushbutton. See operation chart (in Section 1) for moreinformation.

��

� ��

MAG1(P1)

Emergency Brake Magnitude (0-100%)Adjustment for brake torque for emergency stoppush button. See operation chart (in Section 1) formore information.

��

� ��

MAG2(P3)

Brake Timer Adjustment (0-100%)Adjusts the maximum amount of Brake Time. When zero speed sensing is ON, timer must beset to the longest stopping time.

��

� ��

Time(P2)

2-2 Receiving & Installation MN802

Installation Installation, troubleshooting and repair of this equipment should only be performed byqualified personnel familiar with the safe operation of this device.

Considerations It should be installed in an area that is protected from direct sunlight, corrosives, harmfulgases or liquids, dust, metallic particles, and vibration. Exposure to these elements canreduce the operating life and degrade performance of the control. When installing aMultipurpose Brake, several factors should be considered:

Checklist

1. Verify horsepower, line voltage, and current rating of control and motor matchthe ratings of the brake panel.

2. Verify environmental conditions are compatible with the brake panel.

3. Examine the associated motor combination controller and verify that controllerrating and type is compatible with DC single winding injection braking for athree phase induction motor.

4. Verify that the power source has good line voltage regulation and that DCinjection braking will not reduce the line-to-line voltage to less than 75% ofnominal value. Line voltages less than 75% of nominal may cause brakecontactor chatter which may also result in SCR or diode damage.

5. Determine which operating mode will be used (Basic, Master or Pre-Stop).Refer to the Control Wiring Diagrams on the following pages to determine whichmode is right for your configuration. The existing motor control wiring and theadditional connections required for the brake panel are shown in Figures 2-5,2-6 and 2-7.

Table 2-1 Branch-Circuit Short-Circuit and Ground-Fault Protective Device RatingsFuse Instantaneous TripBrake Size

(Amperes) Size(Amperes) Class

Instantaneous TripBreaker Size(Amperes)

16A 60A J 20A25 100A J 20A30 110A J 50A55 175A J 100A80 175A J 100A

135 400A J 300A160 400A RK1 or RK5 300A250 400A RK1 or RK5 300A420 800A J or L600 800A J or L


Procedure

1. Mount the panel in vertical position. Refer to Section 5 for mountingdimensions.

2. Verify that associated combination controller is a full voltage nonreversing typewith control coil operation at 115V, 50/60Hz. Connect the line and loadterminals with proper size wire to line and load side terminals of associatedcontroller. Refer to schematic and torque and wire specifications in Section 5.Do not change phase rotation. See Figure 2-5, 2-6 or 2-7.

3. Verify that the maximum rating or setting of the motor Branch-CircuitShort-Circuit and Ground-Fault protective devices meets the ratings shown inTable 2-1.

Note: The M contactor must have a surge suppressor installed across its coil.

4. Refer to Operating Chart choose the operating mode and wire remote controlswitches or pushbuttons as shown on wiring diagrams (Figures 2-5, 2-6 and2-7) for each selected specific operating mode. Route control wiring separatefrom power wiring.

5. Verify line voltage and adjust jumper on control power transformer (CPT)primary taps.

6. Verify correct phasing of all power connections.

7. Apply power with motor leads disconnected and verify that motor startercontactor and brake contactor do not close at the same time and confirm thatthere is no phase to phase short circuit condition.

8. Refer to Operation Chart; confirm chosen operating mode is set, select and setbrake time range.

9. Set brake magnitude MAG1 adjustment potentiometer P1 to 0% (full CCW).

10. If Emergency braking is required and emergency Stop Push Button is wired, setemergency brake magnitude MAG2 adjustment potentiometer P2 to 0% (full CCW).

11. Set brake time potentiometer P3 to 100% (full CW).

12. Energize the motor without load and confirm that brake operates properly.

13. Energize motor at full load and stop with brake. Observe deceleration andadjust brake magnitude and stopping time to the required sequence.


Control Wiring DiagramsBasic Mode Basic Mode features automatic sensing of motor terminal line voltage. Brake activates

automatically when voltage on the motor terminal decreases to a save level. Separatemotor starter controls govern start and stop cycle. Brake release function providesimmediate means of opening the brake contactor. This feature adds operational flexibilityand a safety factor as well.

Figure 2-5 shows the Basic mode connections into an existing motor combinationcontroller and motor.

Use MAG1 potentiometer P1 to adjust braking magnitude for stop.

Description of Control Board Connections (Refer to Figure 2-5)

Terminal Description

TB1-4 OPEN initiates emergency stop braking with magnitude MAG2(P3). (Open M contactor, close brakecontactor, apply DC to motor (T1, T2) with MAG2(P3), and open brake contactor at zero speed or end ofbrake timer).CLOSED allows normal operation.

TB1-6 OPEN Brake enabled (closes brake contactor).CLOSED releases Brake (opens brake contactor).

TB1-7 & 8 Motor interlock is rated 5A at 125VAC. Motor Interlock is energized when 115VAC is applied to BrakeControl Board.

Note: For brake panels that have a higher current rating, relay R2 is installed to provide a 10 Amp rating for the M contactor. The relay is shown but is not installed in all brake panels.

If R2 is installed, connect the Start switch and M contactor outputs to R2 terminals 1 and 3 (10 Amp, 240VAC rating).

If R2 is not installed, connect the Start switch and M contactor outputs to TB1 terminals 7 and 8 (10 Amp, 125VAC rating).

Adjustments

Brake Magnitude Adjustment (0-100%)Adjusts brake torque for normal motor stop.

��

� ��

MAG1(P1)

Emergency Brake Magnitude (0-100%)Adjusts brake torque for emergency motor stop.

��

� ��

MAG2(P3)

Brake Timer Adjustment (0-100%)Adjusts the maximum amount of Brake Time.When zero speed sensing is ON, timer must beset to the longest stopping time.

��

� ��

Time(P2)

Switch (S1):



S1-5 Zero Speed Sensor

S1-6 Brake Status


ON ON Basic Mode




Control Wiring Diagrams Continued

Figure 2-5 Basic Mode Diagram

Notes:� Refer to the operation chart for the use of inputs and switches.

� All switches and contacts wired to TB1 terminals 1 - 6 must be dry isolated contact type.

� All control wiring must be installed in a separate conduit and routed away from the linevoltage and motor lead conduits for noise reduction.

� In Basic mode, braking is activated when the voltage at the motor terminals decreasesto a safe level (80% of nominal Line voltage). P1 adjusts brake magnitude. Braking timeis controlled by timer or zero speed sensing.

� If the emergency stop switch is not used, place jumper wire from TB1-4 to TB1-1.

1

2345678

��

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Common

Emergency Stop

Brake Control Board(BRDT-B2)

Brake Release

Motor Interlock

��

��

��

Phase A

Brake Connection Diagram – Basic Mode

Brake Assembly

1 47 8

Phase BL2

Phase C

L1 T1

T2

T3

CircuitBreakers

orFused Inputs

Motor

Fuse

Stop Start

M

Noise Suppressor

M

6

�

�

�

�

M

M

M

Control Board��

J5

3 1 4 6 8 5

��ExistingSite Wiring CPT

460V

230V

208V

L2

L1F1

F2

�

�

TB1Notes:

� Relay R2 is only installed onlarge brake assemblies toprovide 10A contact forconnection to M contactor.

� If Relay R2 is installed,connections should be madeto R2 pins 1 and 3.If Relay R2 is not installed,connections should be madeto Control Board pins 7 and 8.

� Add surge suppressor if notincluded in contactor coil.

�

BC

Operating ModesOperation Basic Mode

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Master Mode Master Mode initiates the brake cycle when the Stop or Emergency Stop push buttonsare pressed. Extended brake times allows the motor to come to a controlled full stopbefore the brake shuts off, thus avoiding uncontrolled coasting. Also, Master Modeallows the Jog function. Jog allows conventional jogging push button control of the motorstarter contactor with motor coasting with brake action disabled. Brake release functionprovides immediate means of opening the brake contactor. This feature adds operationalflexibility and a safety factor as well.

Figure 2-6 shows the Master mode connections into an existing motor combinationcontroller and motor.

Description of Control Board Connections (Refer to Figure 2-6)

Terminal Description

TB1-2 OPEN allows normal operation.CLOSED starts motor (closes M contactor).

TB1-3 Momentary OPEN stops motor (open the M contactor, closes brake contactor, apply DC to motor (T1, T2)with MAG1 (P1), and open brake contactor at zero speed or end of brake timer).

TB1-4 OPEN initiates emergency stop braking with magnitude MAG2(P3). (Open M contactor, close brakecontactor, apply DC to motor (T1, T2) with MAG2(P3), and open brake contactor at zero speed or end ofbrake timer).CLOSED allows normal operation.

TB1-5 Momentary CLOSED starts motor (closes M contactor) while switch is closed. When switch is released, M contactor opens without braking (motor coasts to stop).



Note: For brake panels that have a higher current rating, relay R2 is installed to provide a 10 Amp rating for the M contactor. The relay is shown but is not installed in all brake panels.

If R2 is installed, connect the Start switch and M contactor outputs to R2 terminals 1 and 3 (10 Amp rating).

If R2 is not installed, connect the Start switch and M contactor outputs to TB1 terminals 7 and 8 (5 Amp rating).

Adjustments


��

� ��

MAG1(P1)


��

� ��

MAG2(P3)


��

� ��

Time(P2)

Switch (S1):




OFF ON Master Mode



S1-6 Brake Status




Control Wiring Diagrams ContinuedFigure 2-6 Master Mode Diagram

� Refer to the operation chart for the use of inputs and switches.


� All control wiring must be installed in a separate conduit and routed away from the linevoltage and motor lead conduits. This will reduce the electromagnetic noise inductionthat will cause erratic operation.

� If non-momentary 2 wire control is used, place jumper wire from TB1-3 to TB1-2.


Notes:

1

2345678

��

��

��

��

��

CommonStartStopEmergency Stop


JogBrake Release

Motor Interlock

��

��

��

Phase A

Brake Connection Diagram – Master Mode

Brake Assembly

1 27 8

Phase BL2

Phase C

L1 T1

T2

T3

CircuitBreakers

orFused Inputs

Motor

Fuse

Noise Suppressor

M

6

�

�

�

�

M

M

M

Control Board��

J5

3 1 4 6 8 5


460V

230V

208V

L2

L1F1

F2

�

�

TB1Notes:




543

StartStop

Emergency StopJog

Brake Release

�

BC

Operation Master Mode�&-!&�)��*�+ �,��.'/ ��'&'!�$'#&-$&'!

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Pre-Stop Mode Pre-stop Mode initiates the brake cycle when the Start push button is pressed. The Brake cycleincludes opening of a motor starter contactor, sensing the safe voltage level, closing the brakecontactor, injecting DC current into motor winding (brake action), then sensing zero speed andopening the brake contactor. The sequence ensures that the motor is first stopped before startingthe motor. Stop push button open the motor starter contactor and motor coast to stop. Zerospeed sensing followed by brake shut off eliminates unnecessary heat in the motor winding.

Figure 2-7 shows the Pre-Stop mode connections into an existing motor combination controllerand motor.

Description of Control Board Connections (Refer to Figure 2-7)Terminal DescriptionTB1-2 OPEN allows normal operation.

CLOSED starts motor (close brake contactor, apply DC to motor (T1, T2), open brake contactor andcloses M contactor).

TB1-3 Momentary OPEN stops motor (open the M contactor, motor coasts to stop).TB1-4 OPEN initiates emergency stop braking with magnitude MAG2(P3). (Open M contactor, close brake

contactor, apply DC to motor (T1, T2) with MAG2(P3), and open brake contactor at zero speed or end ofbrake timer).CLOSED allows normal operation.



TB1-9 & 10 115VAC input is factory wired from control power transformer.Note: For brake panels that have a higher current rating, relay R2 is installed to provide a 10 Amp rating for the

M contactor. The relay is shown but is not installed in all brake panels.

If R2 is installed, connect the Start switch and M contactor outputs to R2 terminals 1 and 3 (10 Amp rating).

If R2 is not installed, connect the Start switch and M contactor outputs to TB1 terminals 7 and 8 (5 Amp rating).

Adjustments


��

� ��

MAG2(P3)


��

� ��

Time(P2)

Switch (S1):




ON OFF Pre-Stop Mode



S1-6 Brake Status



��

� ��

MAG1(P1)



Figure 2-7 Pre-Stop Mode Diagram

� Refer to the operation chart for the use of inputs and switches.


� All control wiring must be installed in a separate conduit and routed away from the linevoltage and motor lead conduits. This will reduce the electromagnetic noise inductionthat will cause erratic operation.


Notes:

1

2345678

��

��

��

��

��

CommonStartStopEmergency Stop


Brake Release

Motor Interlock

��

��

��

Phase A

Brake Connection Diagram – Pre-Stop Mode

Brake Assembly

1 27 8

Phase BL2

Phase C

L1 T1

T2

T3Circuit

Breakersor

Fused Inputs

Motor

Fuse

Noise Suppressor

M

6

�

�

�

�

M

M

M

Control Board��

J5

3 1 4 6 8 5


460V

230V

208V

L2

L1F1

F2

�

�

TB1Notes:




543

StartStop

Emergency Stop

Brake Release

�

BC

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Section 3Startup and Maintenance

Startup and Maintenance 3-1MN802

Overview Before the Multipurpose Brake is placed into service, adjustment of its operatingcharacteristics is required. None of the adjustments are preset at the factory. Be carefulnot to damage the potentiometers during adjustment. They have a maximum rotationspan of 270 degrees. Use the adjustment wand provided and do not force theadjustments beyond the stops. Two tools are needed for these adjustments.

� Volt ohm meter (VOM) - at least 20k� per volt.

� Adjustment wand provided with the Multipurpose Brake.

Initial Adjustments Use this procedure as a guideline to match the braking characteristics to the motor load.

1. Confirm operating mode, time range switch settings and external pushbuttonand selector switch connections.

2. Set MAG1 potentiometer P1 to 0 (full CCW).

3. Set brake TIME potentiometer P2 to 100% (full CW).

4. Adjust MAG1 and TIME as needed to obtain correct stop sequence.

Operation Checks After the initial adjustments are complete, these operation checks should be performed toensure optimum operation of the control.

1. Measure the line voltage at the control L1 and L2 terminals during acceleration.The line voltage should never be less than the minimum operating voltage.

2. Measure the voltage at TB1-9 and TB1-10 of the Brake Control Board. It should be 120VAC (±10%).

Maintenance The control should be checked at regular intervals.

Disconnect all input power before any maintenance checks are performed.

� Check all connections for tightness and signs of overheating.

� Check for cracked or damaged insulators and terminal blocks.

� Inspect heat sinks for cleanliness. Be sure to remove dust or dirt buildup and tomaintain proper ventilation.

� Remove dust and dirt by vacuuming. Do not wash or use solvents.


3-2 Startup and Maintenance MN802

Section 4Troubleshooting

Troubleshooting 4-1MN802

Preliminary Checks In the event of trouble disconnect all input power to the control and perform thesepreliminary checks.

� Check all electrical connections to verify they are proper for the operating modeselected. (Refer to Installation Section 2 and Control Wiring Diagrams inSections 2 and 5 of this manual.)

� Verify that DIP switches are correctly set for the operating mode selected.(Refer to Installation Section 2 of this manual.)

� Verify that the Motor Interlock (TB1-7 and TB1-8) are properly connected inseries with the Motor Contractor coil.

� Verify TIME (P2) is fully CCW, 0% braking time.

� Verify MAG1 (P1) is fully CCW, 0% braking magnitude.

� Verify MAG2 (P3) is fully CW, 100% braking.

� Check all connections for tightness and signs of overheating.

� Check for cracked or damaged insulators and terminal blocks.

� Check all motor connections from the control to the motor.

� Verify transformer primary line connections are proper for line voltage. (See transformer nameplate).

LED Indicators (Brake Control Board)RDY- Ready LED should be continuously on. If the RDY LED is flashing, it is signaling anerror condition. The number of flashes indicates one of the following:2 flashes - Improper line voltage.3 flashes - Motor contactor (M) failed to open.4 flashes - Brake contactor (BC) failed to open.5 flashes - Improper line frequency.

Resistance checks:Be sure that all power to the control is still disconnected. Use a VOM (at least 20k� pervolt) and check the resistance at the following terminals. The measured resistanceshould be greater than 10k� for each measurement on the power cell.

KS to AA (SCR cathode to common anode)AA to KD (common anode to diode cathode)

If the measured resistance is less than 10k� for any measurement, a power cell (SCRand Diode pair) is defective. If a shorted SCR is found, be sure to check for shortedconnections, system grounds, or any other condition that may cause the short.Replacement of an SCR without determining the cause of failure may result in repeatfailures.

4-2 Troubleshooting MN802

Control Board Checks Several steps need to be performed before testing the control board.

1. Disconnect all input power.

2. Disconnect all motor leads.

3. Disconnect wires to the control board terminals TB1-7 and TB1-10.

Figure 4-1 Control Board (BRDT-B2) Resistance Measurements

CS

AA KS

SC

RKD

Dio

de

RS

Brake Power Cell(BPC)

SC

R

GK

KD

KS

AA

Measurement Rating016-080

Resistance

Gate to Cathode (SCR) J8 - J3 5 to 30 ohms

Gate to Anode (SCR) J8 - J4 Greater than 10 K ohms

Cathode to Anode (SCR) J3 - J4 Greater than 10 K ohms

Anode to Cathode (SCR) J4 - J3 Greater than 10 K ohms

Anode to Cathode (Diode) J4 - J2 Greater than 10 K ohms

Cathode to Anode (Diode) J2 - J4 Greater than 10 K ohms

� � � � � � � �

��

MAG1 MAG2 TIME

��

��

1 2 3 4 5 6 7 8 9 10��

Brake Control Board (BRDT-B2)

Rating135-250

J8 - J3

J8 - AA

J3 - AA

AA - J3

AA - J2

J2 - AA

Circuit

BRDT-B2 to KD J2 - KD Less than 5 ohms

BRDT-B2 to KS J3 - KS Less than 5 ohms

BRDT-B2 to AA J4 - AA Less than 5 ohms

BRDT-B2 to GK J8 - GK Less than 5 ohms

Motor Interlock TB1-7 to TB1-8 Greater than 10 K ohms

Power Supply XFMR TB1-9 to TB1-10 350 to 450 ohms

J2 - KD

J3 - KS

NA

J8 - GK

Troubleshooting 4-3MN802

Power Cell Checks Several steps need to be performed before testing the power cell.

1. Disconnect all input power.

2. Disconnect all motor leads.

3. Inspect all connections for tightness and indications of overheating.

4. Snubber capacitors should be replaced if there is any sign of leakage.Brakes size 16A to 80A have snubber capacitors on the control board. Larger brakes have capacitors installed on power cells.

5. SCR clamps should be inspected for cracks and tightened evenly using a clampgauge. A clamp gauge is available from Baldor or shipped with the replacementSCR/Diode kit.

6. Heat sinks and insulated surfaces must be clean and free of debris. Air flowmust not be obstructed.

Figure 4-2 Power Cell (BPC) -SCR Resistance Measurements

CS

AA KS

SC

R

KD

Dio

de

RS

BPC

SC

R

GK

KD

KS

AA

Measurement Circuit Resistance

Gate to Cathode (SCR) GK - KS 5 to 30 ohms

Gate to Anode (SCR) GK - AA Greater than 10 K ohms

Cathode to Anode (SCR) KS - AA Greater than 10 K ohms

Anode to Cathode (SCR) AA - KS Greater than 10 K ohms

Anode to Cathode (Diode) AA - KD Greater than 10 K ohms

Cathode to Anode (Diode) KD - AA Greater than 10 K ohms


4-4 Troubleshooting MN802

Section 5Specifications and Product Data

Specifications and Product Data 5-1MN802

Identification

Control TypeB- Dynamic Brake

B Q

Brake TypeQ- 3 Operating ModesInput Voltage Code �7- 208/230/460VAC (50/60Hz)8- 220/230/460/575VAC (50/60Hz)9- 380/415VAC (50/60Hz)

7

� The brake must have a separate 115VAC input. The inpur voltage code is the range of voltages over which thebrake will operate. For example, voltage code “7” will operate between 208 - 460VAC.

� Use rated motor full load current (FLA) to select the proper size brake.

� Stocked multi-purpose dynamic brakes are shipped with control power transformer included. Be sure to set theprimary voltage tap jumper to match the applied line voltage.

– 030 –

Ampere Rating �016- 16 Amp030- 30 Amp055- 55 Amp080- 80 Amp135- 135 Amp160- 160 Amp250- 250 Amp420- 420 Amp600- 600 Amp

C B – * * *

Custom Product Part Number

EnclosureB- NEMA1C- NEMA12P- Panel / OpenD- NEMA4

ConfigurationC- Includes control power

transformer �

5-2 Specifications and Product Data MN802

General Specifications

Output Ratings

Output Horsepower and Current by Model NumberInput <=*��*�� <=*��*�� <=*��*�� <=*��*�� <=*��*�� <=*��*�� <=*��*�� <=*��*�� <=*��*��

VoltageVAC

<

<=*��*��

<

<=*��*��

<

<=*��*��

<

<=*��*��

<

<=*��*��

<

<=*��*��

<

<=*��*��

<

<=*��*��

<

<=*��*��VACHP A HP A HP A HP A HP A HP A HP A HP A HP A

208 4 16 10 30 20 55 25 80 40 135 50 160 75 250 150 420 200 600

230 5 16 10 30 20 55 30 80 50 135 60 160 100 250 150 420 250 600

460 10 16 20 30 40 55 60 80 100 135 125 160 200 250 350 420 500 600

575 10 16 25 30 50 55 75 80 125 135 150 160 250 250 400 420 600 600

Input Ratings

Input Frequency 50/60 HZ ± 5%

Input Voltage ± 10% of Input Voltage Rating (208, 230, 460 or 575 VAC)

Input Current 16, 30, 55, 80,135, 160, 250, 420 or 600 Amperes (see OutputRatings table)Note: Use rated motor full load current (FLA) to select the proper

Multi-Purpose Brake model number for your application.

Phase Three (3) Phase

Service Factor 1.0

Duty Continuous

Operating Conditions

Ambient Operating Temperature: 30-113°F (0 to +45 °C) enclosed30-122°F (0 to +50 °C) open panelDerate Output 1.5% per 1°C over maximum ambient

Rated Storage Temperature: – 30 °C to +65 °C

Humidity: 90% RH Non-Condensing

Altitude: Sea level to 3300 Feet (1000 Meters)Derate 1% per 330 Feet (100 Meters) above 3300 Feet

Enclosure: Open Panel (Indoor)NEMA 1 (Industrial indoor, general purpose)NEMA 12 (Industrial indoor, dust proof)NEMA 4 (Outdoor)

Heat Loss 1 Watt per running ampere of input current while braking.


Control Specifications

Control Method Common Anode SCR and Diode to achieve DC

Peak Inverse Voltage 1200V - for 460VAC controls; 1600V - for 575VAC controls

Brake Magnitude Two (2) adjustable brake magnitudes

Brake Timer Ranges 1-17 seconds; 15-32 seconds; 30-47 seconds; 45-62 seconds

Zero Speed Sensor Selectable (Brake disengages when motor stops rotating)

Motor Interlock Contact Rating 10 Amperes at 125VAC

Status LED’s Power, Ready, Run and Braking

Error Indications Improper line voltage; Improper line frequency; Motor contact failed to open; Brake contactor failed to open;

Listings UL and cUL


Control Wiring DiagramsSize 16A-80A

1

23456789

10

��

��

��

��

��CommonStartStopEmergency Stop

BrakeControl Board

JogBrake Release

Motor Interlock

115VAC Input

��

��

��

F3 F1

F2

115VAC

J2J1J4

J3J8

J5

��

� >

� >

��

��

��

�

�

��

��

��

�4# ��#(3&

�'&'!

�

31

LEGEND

AA- Anode (Diode & SCR)BC- Brake ContactorBCB- Brake Control BoardCBC- Motor Circuit BreakerCPT- Control Power TransformerCS- Snubber CapacitorF1,2- Transformer Primary FusesF3- Transformer Secondary FuseKD- Diode (Cathode)KS- SCR (Cathode)M- Motor ContactorMOV- Metal Oxide VaristorOL- Motor OverloadP1, P2, P3- PotentiometerRS- Snubber ResistorS1- SwitchSCR- Brake SCR/Diode AssemblyTB1- Brake Control TerminalsTB2- Brake Output Terminals

Caution: Do not connect power factor correction capacitors to the brake output terminals.

�

J7

J6

Note: Refer to Section 2 of this manual for TB1 wiring andmotor contactor coil connection information.

TB2X2

X1

H1-460V

H2-230V

H3-208V

Note: F1 is connected to H1 for 460VAC operation. For 230VAC remove the wire from H1 and connect it to H2. For 208VAC operation remove the wire from H1 and connect it to H3.

CPT

�

�

�

Multipurpose Brake

CS

RS

RS

CS

��

�

�

�

� Power wiring between motor controller and motor conduit box. Refer to local codes and NEC for required wire sizing and wire practice.

� Power wiring between brake and motor controller or between brake andmotor conduit box. Refer to the Torque and Wire Specifications table inthis manual for load wire sizing.

� Zero Speed sensing and low voltage sensing input conductor. When motoris located more than 50 feet from brake and zero speed sensing is used tostop braking action, use #14 AWG or larger wire for this connection. If itdoes not violate local electrical code, run this control wire in a separateconduit from T1 and T2 DC Brake power wires.



Size 135A - 600A

1

23456789

10

��

��

��

��

��CommonStartStopEmergency Stop

BrakeControl Board

JogBrake Release

Motor Interlock

115VAC Input

��

��

��

1

3

5

8

6

R2

R2

4

Relay R2 Terminals

R2

R2

J6 J7

�

� �

��

� �

J2J1J4

J3J8

J5

�

BPC ��

� >

� >

��

�

�

��

��

�4'5

��

�4# ��#(3&

�'&'!

�

31

LEGEND

AA- Anode (Diode & SCR)BC- Brake ContactorBCB- Brake Control BoardBCP- Brake Power CellCB- Motor Circuit BreakerCPT- Control Power TransformerCS- Snubber CapacitorF1,2- Transformer Primary FusesF3- Transformer Secondary FuseGK- Gate (SCR)KD- Diode CathodeKS- SCR CathodeL1,2- AC Power InputM- Motor ContactorMOV- Metal Oxide VaristorOL- Motor OverloadP1, P2, P3- PotentiometerR1- Brake Contactor RelayR2- Motor Interlock RelayRS- Snubber ResistorS1- SwitchSCR- Brake SCR/Diode AssemblyT1,2,3- Motor LeadsTB1- Brake Control TerminalsTB2- Brake Output Terminals

Caution: Do not connect power factor correction capacitors to the brake output terminals.

��

��

Note: Refer to Section 2 of this manual for TB1 wiring andmotor contactor coil connection information.

F3 F1

F2

115VAC

X2

X1

H1-460V

H2-230V

H3-208V

Note: Connect F1 to H1 for 460VAC operation or remove the wire from H1and connect it to H2 for 230VAC or to H3 for 208VAC operation.

�

�� TB2

�

�

RS

CS

��

��

CPT

CS

RS

BC

��

Multipurpose Brake

�

�

�

� Power wiring between motor controller and motor conduit box. Refer to local codes and NEC for required wire sizing and wire practice.

� Power wiring between brake and motor controller or between brake andmotor conduit box. Refer to the Torque and Wire Specifications table inthis manual for load wire sizing.

� Zero Speed sensing and low voltage sensing input conductor. When motoris located more than 50 feet from brake and zero speed sensing is used tostop braking action, use #14 AWG or larger wire for this connection. If itdoes not violate local electrical code, run this control wire in a separateconduit from T1 and T2 DC Brake power wires.


Torque and Wire Specifications

Ampere TB1 Line LoadRating Torque Wire Size Torque Wire Size Torque Wire Size

Lb-in Nm AWG mm2 Lb-in Nm AWG mm2 Lb-in Nm AWG mm2

16 9 1 12-22 3.31-0.326 10 5.26 10 5.2630 9 1 12-22 3.31-0.326 6 13.3 6 13.355 9 1 12-22 3.31-0.326 4 21.3 4 21.380 9 1 12-22 3.31-0.326 Refer to tightening 3 26.7 Refer to tightening 3 26.7135 9 1 12-22 3.31-0.326

Refer to tighteningtorque specified on 3/0 85.0

Refer to tighteningtorque specified on 3/0 85.0

160 9 1 12-22 3.31-0.326torque specified on

terminal label. 3/0 85.0torque specified on

terminal label. 3/0 85.0250 9 1 12-22 3.31-0.326 350MCM 177 350MCM 177420 9 1 12-22 3.31-0.326 (2) 300MCM (2) 152 (2) 300MCM (2) 152600 9 1 12-22 3.31-0.326 (2) 300MCM (2) 152 (2) 300MCM (2) 152

Mounting Dimensions

Ampere Panel / Open NEMA 12AmpereRating H W D a b dia. H W D a b dia.

16 14.75 12.88 5.0 14.25 12.26 0.25 16.0 14.0 6.3 16.75 12.0 0.3130 14.75 12.88 5.0 14.25 12.26 0.25 16.0 14.0 6.3 16.75 12.0 .03155 14.75 12.88 6.0 14.25 12.26 0.25 16.0 14.0 6.3 16.75 12.0 0.3180 14.75 12.88 6.0 14.25 12.26 0.25 16.0 14.0 6.3 16.75 12.0 0.31135 21.0 21.0 8.0 19.24 19.24 0.25 24.0 24.0 10.0 25.24 18.0 0.44160 21.0 21.0 8.0 19.24 19.24 0.25 24.0 24.0 10.0 25.24 18.0 0.44250 21.0 21.0 8.0 19.24 19.24 0.25 24.0 24.0 10.0 25.24 18.0 0.44420 33.0 33.0 9.75 31.24 31.24 0.50 36.0 36.0 12.0 37.24 30.0 0.44600 33.0 33.0 9.75 31.24 31.24 0.50 36.0 36.0 12.0 37.24 30.0 0.44

H

b

a

dia.

D

H

b

a

dia.

D

W W

Panel / Open NEMA 12 Enclosure


Dimensions / Panel LayoutSize 16A to 30A

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GND

TB2

T1 T2 T3

Depth = 5″

L1 L2

BC

KD KS AA

SCR

GK

BCB

12.26

12.88

14.2

5

14.7

5

0.25″Holes

F1

F2

F3

CPT

Legend:AA Anode (Diode & SCR)BC Brake Contactor

BCB Brake Control BoardBPC Brake Power CellCPT Control Power Transformer

F1,2,3 Fuses F1, F2 F3GK Gate (SCR)

GND Earth (Ground)KD Cathode (Diode)KS Cathode (SCR)

L1,2 AC Power linesR1 Brake Contactor RelayR2 Motor Interlock Relay

SCR Silicon Controlled RectifierT1,2,3 Motor LeadsTB2 Terminal Strip for motor leads


Dimensions / Panel Layout Continued

Size 55A and 80A

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GND

F1

F2

F3

TB2

T1 T2 T3

Depth = 6″

L1 L2

BC

KD KS AA

SCR

GK

BCB

12.26

12.88

14.2

5

14.7

5

0.25″Holes

CPT



F1,2,3 Fuses F1, F2 F3GK Gate (SCR)

GND Earth (Ground)KD Cathode (Diode)KS Cathode (SCR)

L1,2 AC Power linesR1 Brake Contactor RelayR2 Motor Interlock Relay




Size 135A and 250A

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GND

F1F2

F3

TB2

T1 T2 T3

Depth =8″

L1 L2

BC

BCB

21

19.2

4

21

0.25″Holes

R2R1

CS

AA KS

SC

R

KD

Dio

de

RS

BPC

BALDOR

CPT

KS G

19.24



F1,2,3 Fuses F1, F2 F3G

GK Gate (SCR)GND Earth (Ground)KD Cathode (Diode)KS Cathode (SCR)

L1,2 AC Power linesR1 Brake Contactor RelayR2 Motor Interlock RelayRS Snubber Resistor




Size 420A and 600A

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GND

F1F2

F3

TB2

T1 T2 T3

Depth =9.75″

L1 L2

BC

BCB

33.00

31.2

4

33.0

0

0.50″Holes

R2

R1

SC

R

BPC

CPT

31.24

TGTSA

SB

GLL

RS

CS

S

SC

R

A B



F1,2,3 Fuses F1, F2 F3G

GK Gate (SCR)GND Earth (Ground)KD Cathode (Diode)KS Cathode (SCR)

L1,2 AC Power linesR1 Brake Contactor RelayR2 Motor Interlock RelayRS Snubber Resistor


BALDOR ELECTRIC COMPANYP.O. Box 2400

Ft. Smith, AR 72902–2400(479) 646–4711

Fax (479) 648–5792

Baldor Electric CompanyMN802

Printed in USA7/02 C&J 1000

multipurpose brake - · pdf filethis prevents excess motor heating. the multipurpose brake,...

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