s. power engineering, plot no. 552, industrial area, phase ... · pdf filepower engineering,...

Electrical Panel Selection

Prepared in collaboration with:

M/s. Power Engineering,

Plot No. 552, Industrial Area, Phase- IX, Mohali

Contact Person: Sh. B.S. Verma, 9417233527

Typical Power System

Types of Power Connections

• LT < 50KW.

• HT > 50KW.

• Independent feeders 11KV.

• High Voltage Transmission/ Distribution is Preferred • High Voltage Transmission/ Distribution is Preferred

because of Low losses & Reduced size of Conductors

during transmission.

• The power is transmitted at high voltage and low

current.

• The heat generated during transmission is

proportional to current transmission.

� Power (KW/KVA/HP)

� Rated Current.

� System Voltage

� Breaking Capacity

Making Capacity

Selection of Circuit Breaker

� Making Capacity

� Category A or B

� Suitability to site Condition (Indian Condition)

� Maintenance Definitions

� Effect of harmonics

Calculation Formulas

System for HT/ LT connection

• HVPN Supply

• GO Switch

• HT Metering

• VCB

• Transformer

• LT Panel ( Power control centre, Power factor panel,

AMF)

• Distribution Panel

• Sub Distribution panel

Selection Of GO Switch

Gang Operated Switch

Comprises of :- Lightning

Arresters, GO (gang

operated) switch, Drop off operated) switch, Drop off

Fuse(DO), Plate Earthings

two Nos.

for LA (lightening arrestor)

& GO switch.

Selected at 11KV Only.

Selection of CT & PT

• CT (Current Transformer /5A)

Selected as per the full load

current of Transformer.

• PT ( Potential Transformer) As per

the system

Voltage.(11Kv/220v/110v/24V)ACVoltage.(11Kv/220v/110v/24V)AC

• Calculation of HT Current for CT

KVA/11KV/1.732

• Example:- Transformer rating ( HT

current for CT/PT selection)

500Kva/11KV/1.732 = 26.24

• Tri vector Meter selected as per

HT Current.

VCB Panel• Vacuum Circuit Breaker

• For Switching carrying

Normal Current and

Breaking abnormal current

at High Voltage.at High Voltage.

• 630A ( Short circuit current)

and Above.

• Over Load, Short Circuit &

E/F protections.

• Measurement of current,

Voltage etc.

Transformer

• 11KV( input)/433V ( Output)

• Selection of Transformer as

per Total load.

• Buckle relay and winding

temperature for safety of temperature for safety of

Transfer. These help to trip

VCB.

• Silica gel to check moisture

content. If blue- Ok, If white

or light pink- replace it.

LT Panels

�PCC--- Power Control Center.

�MCC- Motor Control Center.Center.

�AMF- Auto Mains Failure Panel

�APFC- Automatic Power Factor Correction

�Distribution Panels.

STARTER FOR THREE PHASE

INDUCTION MOTOR

�Starting is a process in which a motor’s rotor is brought from zero speed to rated speed.

�The force to rotate in angular movement is called Torque.called Torque.

�Direct On Line Starters used upto 10 HP

�Star Delta Starterso Manual Star Delta Starters ( not used)

o Automatic Start Delta Starters

o Soft Starters

o VFD

1. Contactors + Over Load + MCCB / MPCB

2. Motor Protection Relay

Starter Panel for Induction Motors

2. Motor Protection Relay

3. On delay Timer + Capacitor Duty Contactor + Capacitors

4. Under Voltage & Over Voltage Relay

5. Hour Meter

6. Time Switch

Components To Be used In Starters

� DOL– MPCB-1No,Contactor- 1No, Push Button 2Nos. On Indication 1 No., single phase preventer 1 No Up to 10HP,

� Star Delta Starter– MCCB 1no, Contactors 3nos,MPR-1no, star-delta Timer 1No, Ammeter with CT 1 No, Push Button 2no, on Indication 1no., single phase preventer 1 Button 2no, on Indication 1no., single phase preventer 1 No.

� Soft Starter- MCCB 1 No, Semiconductor fuses 3 Nos., Line Contactor 1 No, Soft Starter 1 No. ( with built in bye-pass contactor & soft starter selected as per duty or application), Push Button 2 Nos.

� VFD- MCCB 1 No, Semiconductor fuses 3 Nos, VFD1 No.

Push Button 2 Nos. Input/ Out put Chokes.

REDUCTION IN KVA DEMAND DUE TO

POWER FACTOR

LOAD - 900 KW

EXISTING P.F. (COS - 0.6

DESIRED P.F. (COS ) - 0.92 Ø.

Ø 1)

Ø2

KW

KVA 1 = 900 / 0.6 = 1500

KVA2 = 900 / 0.92 = 978

kW

kVACOS =

KVA =

Ø.

kW

cosØ.Reduction in KVA

1500 - 978 = 522

REDUCTION IN LINE

CURRENT

KVA =

I =

I1 =

√3 V I

1000

KVA x 1000

√3 x 415

1500 x 1000

KVA1 - 1500

KVA2 - 978

I1 =

=

I2 =

=

1500 x 1000

√3 x 415

2087 Amp

978 x 1000

√3 x 415

1361 Amp

Reduction in Current

2087 - 1361 = 726

Selection of Capacitor

• Configuration of capacitors1. Individual Compensation2. Group Compensation3. Central Compensation

• KVAR required ( Capacitor)= KVA X √(1- PF ²) - KVA X √(1- PF ²) = KVA X √(1- PF(E)²) - KVA X √(1- PF(T)²)

Existing Power factor from HVPN= PF(E) i.e. 0.6 to 0.75

Target Power factor for system = PF(T) i.e. 0.99

Advantage of Soft Starter

�It starts the motor rotor from zero to designed speed thereby reducing initial load on system.load on system.

�The star Delta starts generally starts with jerk i.e. 30 % of designed speed.

�Soft starters are preferred at high heads.

START

Direct on Line

100

80

60

40

20

0TIME

% VOLTS

Line ContactorOverload

StartStart

RunRun

STARTRun Contactor

Primary

Resistance

100

80

60

40

20

0TIME

% VOLTS

Line Contactor ResistorsOverload

StartStart

RunRun

START

Transformer

Contactor

Star Point

Contactor

Auto-

transformer

100

80

60

40

20

0TIME

% VOLTSLine Contactor Overload

StartStart

RunRun

START

Delta

Contactor

Star Point

Contactor Star -

Delta

100

80

60

40

20

0TIME

% VOLTSLine Contactor Overload

StartStart

RunRun

Soft StartingSTART

% VOLTS

100

80

60

40

20

0

TIME

StartStart

RunRun

IMS2 Product Familiarisation

EBG – Electrical Standard Products

Basics of AC Drives

• Frequency controls Motor speed

• Supply Voltage controls Motor Torque

• Supply Voltage is varied in proportion to

supply frequency so as to keep torque

LARSEN & TOUBRO LIMITED.

supply frequency so as to keep torque

constant

DO’s AND DON’TsDO’s AND DON’TsDO’s AND DON’TsDO’s AND DON’Ts

GOOD TERMINATION PRACTICE

TERMINATION WITH

BUSBAR/LINK

DON’T

DO

DON’T

DODO

DON’T

DO

TERMINATION WITH

LUGS

DON’T

DO

MCB (Miniature Circuit Breaker),

• Rated current not more than 63 A, Thermal or thermal-magnetic operation.

MCCB (Moulded Case Circuit Breaker)

• Rated current above 32 A upto 630 A, Trip

current may be adjustable, Thermal or

thermal-magnetic operation.

Air Circuit Breaker

• Rated current from 800 A upto 6,000 A,

• Trip characteristics often fully adjustable including

configurable trip thresholds and delays.

• Usually electronically controlled—some models are • Usually electronically controlled—some models are

microprocessor controlled.

• Often used for main power distribution in large

industrial plant, where the breakers are arranged in

draw-out enclosures for ease of maintenance.

MCB Selection

• Overload which is intended to prevent the accidental overloading of the cable in a no fault situation. The speed of the MCB tripping will vary with the degree of the overload. This is usually achieved by the use of a thermal device in the MCB.

• The second characteristic is the magnetic fault protection, which is intended to operate when the fault reaches a predetermined level and to trip the MCB within one tenth of a second. The level of this magnetic trip gives the MCB its type characteristic as follows:gives the MCB its type characteristic as follows:

Type Tripping Current Operating Time

Type B ( Domestic) 3 To 5 time full load current 0.04 To 13 Sec

Type C ( Industrial) 5 To 10 times full load current 0.04 To 5 Sec

Type D ( Capacitor) 10 To 20 times full load current 0.04 To 3 Sec

Fuse and MCB characteristics

• The fuse and the MCB, even though their nominal currents are similar, have very different properties.

• For example, For 32Amp MCB and 30 Amp Fuse, to be sure of tripping in 0.1 seconds, the MCB requires a current of 128 amps, while the fuse requires 300 amps.amps.

• The fuse clearly requires more current to blow it in that time, but notice how much bigger both these currents are than the ’30 amps’ marked current rating.

• Fuse require replacement after blowing but MCB only switched on.

ACBACB

ACB

Cable Selection

• Armoured Cables ( For Out door, under ground)

• Unarmoured Cables ( for indoor but open in cable trays)

• Submersible cables

• Size of Cable ( as per load)

• Insulation on cable ( PVC, XLPE)

• Core 3 ( where neutral not required) or 3 ½ cable ( where • Core 3 ( where neutral not required) or 3 ½ cable ( where neutral required)

• 3 core cable in HT, Motor, capacitor

• 3 ½ Core in light load,

Insulation over cable

• Poly Vinyl Chloride

• Cross-Linked Polyethylene (XLPE)- Less

deformation below 100°C, Lower in cost,

Lower dissipation factor, Lower dielectric Lower dissipation factor, Lower dielectric

constant, Higher dielectric strength Physically

tougher, More resistant to chemicals, More oil

resistant

Colour Code for Cables

Single Phase System Three phase System

Live Red Red, Yellow, Blue

Neutral Black Black

Ground Green GreenGround Green Green

EARTHING

BY EARTHING (OR GROUNDING), WE

MEAN MAKING A PHYSICAL AND MEAN MAKING A PHYSICAL AND

ELECTRICAL CONNECTION TO THE

GENERAL MASS OF EARTH.

TYPES OF EARTHING

• SYSTEM EARTHING

• EQUIPMENT EARTHING• EQUIPMENT EARTHING

• LIGHTNING PROTECTION EARTHING

• STATIC EARTHING

SYSTEM EARTHING

SYSTEM EARTHING IS THE EARTHING ASSOCIATED WITH THE CURRENT CARRYING CONDUCTOR (USUALLY THE NEUTRAL POINT OF THE TRANSFORMER OR GENERATOR) AND IS NORMALLY ESSENTIAL FOR THE SECURITY OF THE SYSTEM. THE SYSTEM.

(This is covered by IS 3043:1987

– Code of Practice for Earthing)

EQUIPMENT EARTHING

EQUIPMENT EARTHING IS THE EARTHING ASSOCIATED WITH NON CURRENT CARRYING METAL WORK AND IS ESSENTIAL TO THE SAFETY OF HUMAN LIFE, ANIMALS & PROPERTY. LIFE, ANIMALS & PROPERTY.


– Code of Practice for Earthing)

LIGHTNING PROTECTION EARTHING

LIGHTNING PROTECTION EARTHING IS CONCERNED WITH THE CONDUCTION OF CURRENT DISCHARGES IN ATMOSPHERE ORIGINATING IN CLOUD FORMATIONS TO EARTH AND IS ESSENTIAL FOR THE PROTECTION OF BUILDINGS, FOR THE PROTECTION OF BUILDINGS, TRANSMISSION LINES AND ELECTRICAL EQUIPMENT.


– Protection of buildings and allied structures against lightning – Code of Practice)

SYSTEM EARTHINGWHY ?

� GREATER SERVICE CONTINUITY

� REDUCTION IN OCCURRENCES OF

MULTIPLE FAULTS TO GROUNDMULTIPLE FAULTS TO GROUND

� FEWER ARCING FAULT BURNDOWNS

� EASIER LOCATION OF FAULTS

� GREATER SAFETY

� POSSIBLE SAVING IN COST

EQUIPMENT EARTHINGWHY ?

1. FREEDOM FROM DANGEROUS ELECTRIC

SHOCK HAZARDS

2. REDUCTION IN FIRE HAZARDS2. REDUCTION IN FIRE HAZARDS

3. PRESERVATION OF SYSTEM

PERFORMANCE

REDUCTION IN SHOCK HAZARDSREDUCTION IN SHOCK HAZARDSCASE 1 : NO EQUIPMENT EARTHING

V

LOAD

SOURCE V

LOAD

SOURCE V

SYSTEM

EARTHING

SOURCE V

SYSTEM

EARTHING

SOURCE

REDUCTION IN SHOCK HAZARDSREDUCTION IN SHOCK HAZARDSCASE 3 : EQUIPMENT EARTHING WITH PE CONDUCTOR

V

LOAD

SOURCE V

SYSTEM

EARTHING

SOURCE

EQUIPMENT

EARTHING

Difference between Pipe and Plate Earthing

• Plate earthing costly but reliable.

• Plate earhing is more efficient.

• Less maintenance cost.

• Easy to maintain resistance value.• Easy to maintain resistance value.

• Design Details :

1. Earthing Pit : Size 1000 X 1000 X 1800 mm

Depth.M.S. / C.I. Plate : 500 X 500 X 8 mm

Thick.

2. Electrode Assembly : 40 mm Ø GI / CI

Standard Pipe & Plate Type Earthing Design for the Standard Pipe & Plate Type Earthing Design for the

11 11 KvKv. System Equipments, Distribution Transformer . System Equipments, Distribution Transformer

CentersCenters, L.T. Distribution System Equipments, L.T. Distribution System Equipments

2. Electrode Assembly : 40 mm Ø GI / CI

Perforated pipe duly fitted or welded with base

plate and 50 X 6 mm flat termination taken on

top for equipment earthing as shown in drawing.

4. Mixture - I : Homogeneous mixture of black

soft soil 0.3 CMT. approx.

5. Mixture - II : Homogeneous mixture of

common salt 25 Kgs. + wood charcoal pieces

25 Kgs. + Black soft soil 1 CMT. Approx.

Standard Pipe & Plate Type Earthing Design for the 11 Kv. System Equipments, Distribution Transformer

Centers, L.T. Distribution System Equipments

6. Crushed Rock pieces Gravel Size 50 X 35 mm

0.1 CMT. Approx.

7. Arrangement for earthing lead terminations

from equipment body, and connection for

main earthing Grid.

• Design Details :

1. 75 mm thick RCC Cover.

2. 300 mm Ø 6000 mm deep (Approx. 20 ft.)

bore in the earth.

3. 65 mm Ø 6000 mm long (Approx 20 ft.) G.I.

Typical arrangement for Pipe Typical arrangement for Pipe

electrode earthing pit (Bore Type)electrode earthing pit (Bore Type)

3. 65 mm Ø 6000 mm long (Approx 20 ft.) G.I.

pipe electrode. Forged at the top up to 75 mm

length and 12 mm hole provided for taking

earthing connection.

4. A homogeneous mixture of 50 kgs. wooden

coal pieces + 50 kgs. common salt

5. Water pouring purpose at the time of routine

maintenance

No. of earthing Required

• Equipment Pipe Plate

• GO Switch - 2

• HT metering panel 1 1

• Transformer 1 2• Transformer 1 2

• LT Panel - 2

• Electric Motor 1 -

HP of Motor

HP of Motor= QH/4500/efficiency

Q= Discharge in LPMQ= Discharge in LPM

H= Head of pump in meters

Efficiency varies from 65% to 85%

Motor Start Theory

ME00107A

Type of Insulation and Enclosures for electric

motors

• Insulation Class of winding wire

Class Y- 90°C, Class A- 105°C, Class E- 120°C, Class B- 130°C,

Class H- 180°CClass H- 180°C

To be used as application.

• Enclosures

Screen Protected, screen protected drip proof, Splash proof,

Totally enclosed fan cooled, Totally enclosed and separately

air cooled, totally enclosed air circuit motor, direct ventilated

motor

Descripition of Transformer Capacity

1 KVA of Transformer 100 150 200 250

2 KW of TR. at P.F -0.8 75 125 175 200

3 Full load current of TR. 150 200 250 347

Details of accessories to run the transformer

4 Size of cable 3-core

H.T.side ( Aluminium ) in mm2 35 35 35 355 Size of cable 3 1/2 core

L.T. side(Aluminium ) in mm2 1x185 sqmm 1x240 sqmm 1x240 sqmm 2X185 sqmm

6Metering panel with C.T./P.T unit 15/5 A/110 V 15/5 A/110 V 15/5 A/110 V 15/5 A/110 V

Detail of TRANSFORMER and its Accessories

6 unit 15/5 A/110 V 15/5 A/110 V 15/5 A/110 V 15/5 A/110 V

7Trivector meter as per TR. rating 15/5 A/110 V 15/5 A/110 V 15/5 A/110 V 15/5 A/110 V

8HT VCB/SF-6 panel with HT meteringAs per TR. Rating. NA NA NA NA

9G.O.switch with allaccessories I/C D.O.fuse ,lighting arrestor and stay wireset, earthing etc. Required Required Required Required

10HT current of TR.- on HT side (Amp.) 5.24 7.88 10.5 13.33

11 Impedance % 4 4 4.75 4.75

12Capocitor for TR (KVAR) only for TR losses 4 5 7 10


1 KVA of Transformer 315 400 500 630

2 KW of TR. at P.F -0.8 252 320 400 604

3 Full load current of TR. 433 530 687 866



H.T.side ( Aluminium ) in mm2 35 50 50 50

5 Size of cable 3 1/2 core

L.T. side(Aluminium ) in mm2 2X240 sqmm 2X240 sqmm 3X240 sqmm 3X240 sqmm

6Metering panel with C.T./P.T unit 20/5 A/110 V 25/5 A/110 V 30/5 A/110 V 50/5 A/110 V

7Trivector meter as per TR. rating 20/5 A/110 V 25/5 A/110 V 30/5 A/110 V 50/5 A/110 V7 rating 20/5 A/110 V 25/5 A/110 V 30/5 A/110 V 50/5 A/110 V

8HT VCB/SF-6 panel with HT metering

As per TR. Rating. Required Required Required Required

9G.O.switch with allaccessories I/C D.O.fuse ,lighting arrestor and stay wireset, earthing etc. Required Required Required Required

10HT current of TR.- on HT side (Amp.) 16.8 21.33 26.66 40.26

11 Impedance % 4.75 4.75 4.75 5

12Capocitor for TR (KVAR) only for TR losses 12.5 20 25 30


1 KVA of Transformer 800 1000 1250 1600 2000

2 KW of TR. at P.F -0.8 640 800 1000 1280 1600

3 Full load current of TR. 1100 1375 1718 2199 2740



H.T.side ( Aluminium ) in mm2 70 70 95 125 125

5 Size of cable 3 1/2 core Bus duct 1200

ABus duct 1600

ABus duct 2000

ABus duct 2500

ABus duct 4000

AL.T. side(Aluminium ) in mm2 3X400 sqmm 4X400 sqmm N/A N/A N/A

Metering panel with C.T./P.T 6

Metering panel with C.T./P.T unit 50/5 A/110 V 60/5 A/110 V 70/5 A/110 V 100/5 A/110 V 125/5 A/110 V

7Trivector meter as per TR. rating 50/5 A/110 V 60/5 A/110 V 70/5 A/110 V 100/5 A/110 V 125/5 A/110 V

8HT VCB/SF-6 panel with HT metering

As per TR. Rating. Required Required Required Required Required

9G.O.switch with allaccessories I/C D.O.fuse ,lighting arrestor and staywire set, earthing etc. Required Required Required Required Required

10HT current of TR.- on HT side (Amp.) 42.66 53.33 66.66 85.33 106.66

11 Impedance % 5 5 5 6.25 6.25

12Capocitor for TR (KVAR) only for TR losses 35 50 50 75 100

NOTE :-

a)

HT VCB / SF-6 as incomer of Transformer on HT side ( and required as per

Electricity Board norms )

b) CT ratio 50/25/5 A ( if load vary from 25 amp. To 50 amp after expansion on HT

side of Transformer

c) CT ratio - 30/30/5 amp. ( separate for metering and separate for protection.) c) CT ratio - 30/30/5 amp. ( separate for metering and separate for protection.)

d) Calculation of HT current of Transformer = Kva / 11 kv / 1.73.

e) PT- 110 /220 volt AC.( as per requirement )

Detail of D.G.Sets with details

1 KVA 5 7.5 10 15 15 20 25 30 30 40 50 62.5 62.5 75 82.5

2 KW 4 6 8 12 12 16 20 24 24 32 40 50 50 60 66

3 AMPS 6.95 10.4 13.9 20.8 20.8 27.8 34.75 41.7 41.7 55.6 69.5 86.9 86.9 104 114.6

4 BHP 7 10 12 18.7 19 28 32 38 43 50.5 65 76 83 105 105

1 KVA 100 125 160 180 200 250 320 380 437 500 625 750 1000

2 KW 80 100 128 144 160 200 256 304 350 400 500 600 800

3 AMPS 139 173.7 222.4 250 278 348 445 528 608 614 868.8 1043 1390

4 BHP 127 154 205 231 255 306 380 450 530 614 750 890 1180

Detail of DIRECT ON LINE ( DOL ) starter with all type of possible accessories

S.No.DESCREPTION OF MOTOR

1 HP-3Phase 415 V AC 0.5 0.75 1 1.52 KW of Motor 0.37 0.55 0.75 1.13 Full load current of Motor

in amp. 1.2 1.6 1.8 2.6

EQUIPMENT TO START THE MOTOR BELOW FOR EACH MOTOR4 MPCB as incomer. In amp. MPCB MPCB MPCB MPCB

1-1.6 A 1-1.6 A 1.6-2.5 A 2.5-4 A5 Contactor rating in amp. 1x9 amp 1x9 amp 1x9 amp 1x9 amp6 Single phase preventor 415 v 6 Single phase preventor 415 v

AC. A/P/R A/P/R A/P/R A/P/R7 Control MCB SP.( single pole

) 6 amp SP 6 amp SP 6 amp SP 6 amp SP8 Push Botton ( START &

STOP ) 1 NO+1 NC 2-Nos 2-Nos 2-Nos 2-Nos9 On Indication ( LED 220 V

AC ) 1-Nos 1-Nos 1-Nos 1-Nos10 Cable for supply side 3 1/2

core COPPER 1.5 sq mm 1.5 sq mm 1.5 sq mm 1.5 sq mm11 Cable for Motor side 3-core

COPPER. 1.5 sq mm 1.5 sq mm 1.5 sq mm 1.5 sq mm

Detail of DIRECT ON LINE ( DOL ) starter with all type of possible accessories

S.No.

DESCREPTION OF MOTOR

1 HP-3Phase 415 V AC 2 3 5 7.5 102 KW of Motor 1.5 2.25 3.75 5.5 7.53 Full load current of

Motor in amp. 3.5 5 7.5 11 14

EQUIPMENT TO START THE MOTOR BELOW FOR EACH MOTOR4 MPCB as incomer. In

amp. MPCB MPCB MPCB MPCB MPCB

2.5-4 A 4-6.3 A 6-10 A 9-15 A 9-15 A5 Contactor rating in amp. 1x9 amp 1x9 amp 1x12 amp 1x18 amp 1x25 amp5 Contactor rating in amp. 1x9 amp 1x9 amp 1x12 amp 1x18 amp 1x25 amp6 Single phase preventor

415 v AC. A/P/R A/P/R A/P/R A/P/R A/P/R7 Control MCB SP.( single

pole ) 6 amp SP 6 amp SP 6 amp SP 6 amp SP 6 amp SP8 Push Botton ( START &

STOP ) 1 NO+1 NC 2-Nos 2-Nos 2-Nos 2-Nos 2-Nos9 On Indication ( LED 220

V AC ) 1-Nos 1-Nos 1-Nos 1-Nos 1-Nos10 Cable for supply side 3

1/2 core COPPER 2.5 sq mm 2.5 sq mm 2.5 sq mm 4 sq mm 4 sq mm11 Cable for Motor side 3-

core COPPER. 2.5 sq mm 2.5 sq mm 2.5 sq mm 4 sq mm 4 sq mm

Single phase preventor 415 v AC = A/P/R ( AS PER REQUIRMENT )


1 HP-3Phase 415 V AC 15 20 25 30 35

2 KW of Motor 11 15 18.5 22 26

3Full load Line current of Motor in amp. 21 28 35 40 47

4Phase current of Motor in amp. 12 16 20 23 27

EQUIPMENT TO START THE MOTOR BELOW FOR EACH MOTOR

5MPCB/MCCB as incomer. In amp. MPCB MPCB MCCB MCCB MCCB

19-25 A 24-32 A 63 A 100 A 100 A

Detail of STAR/DELTA starter with all type of possible accessories

19-25 A 24-32 A 63 A 100 A 100 A6 Contactor rating in amp. 3x25 amp 3x32 amp 3x32 amp 3x40 amp 3x40 amp

7 Motor protection relay -MPR Not-req Not-req MPR MPR MPR ( 2.5-5 A ) ( 2.5-5 A ) ( 2.5-5 A )

8 Timers 0-60 sec 0-60 sec 0-60 sec 0-60 sec 0-60 sec

9Single phase preventor 415 v AC. A/P/R A/P/R A/P/R A/P/R A/P/R

10 Control MCB SP. 6 amp SP 6 amp SP 6 amp SP 6 amp SP 6 amp SP

11 Amp. Meter 0-50 amp 0-50 amp 0-50 amp 0-50 amp 0-75 amp12 CT,s ( -/5 amp ) 50/5 amp 50/5 amp 50/5 amp 50/5 amp 75/5 amp

13Cable for supply side 3 1/2 core ALUMINIUM 10 sq mm 10 sq mm 16 sq mm 16 sq mm 25 sq mm

14Cable for Motor side 3-core ALUMINIUM. 2x6 sq mm 2x6 sq mm 2x10 sq mm 2x10 sq mm 2x16 sq mm


1 HP-3Phase 415 V AC 40 50 60 75 90

2 KW of Motor 30 37 45 56 67.5

3Full load line current of Motor in amp. 55 66 80 100 120

4Phase current of Motor in amp. 30 35 45 57 69


5MPCB/MCCB as incomer. In amp. MCCB MCCB MCCB MCCB MCCB

100 A 100 A 125 A 160 A 200 A


100 A 100 A 125 A 160 A 200 A

6 Contactor rating in amp. 3x40 amp 3x50 amp 3x70 amp 3x80 amp 3x110amp

7 Motor protection relay -MPR MPR MPR MPR MPR MPR

( 2.5-5 A ) ( 2.5-5 A ) ( 2.5-5 A ) ( 2.5-5 A ) ( 2.5-5 A )

8 Timers 0-60 sec 0-60 sec 0-60 sec 0-60 sec 0-60 sec

9Single phase preventor 415 v AC. A/P/R A/P/R A/P/R A/P/R A/P/R

10 Control MCB SP. 6 amp SP 6 amp SP 6 amp SP 6 amp SP 6 amp SP

11 Amp. Meter 0-75 amp 0-100 amp 0-100 amp 0-150 amp 0-150 amp

12 CT,s ( -/5 amp ) 75/5 amp 100/5 amp 100/5 amp 150/5 amp 150/5 amp

13Cable for supply side 3 1/2 core ALUMINIUM 25 sq mm 35 sq mm 50 sq mm 70 sq mm 70 sq mm

14Cable for Motor side 3-core ALUMINIUM. 2x16 sq mm 2x16 sq mm 2x25 sq mm 2x25 sq mm 2x50 sq mm


S.No.DISCREPTION OF MOTOR

1 HP-3Phase 415 V AC 100 125 150 175 200 250

2 KW of Motor 75 90 112 132 150 187

3Full load line current of Motor in amp. 135 165 200 230 275 323

4Phase current of Motor in amp. 78 95 115 133 159 185


5MPCB/MCCB as incomer. In amp. MCCB MCCB MCCB MCCB MCCB MCCB

250 A 250 A 400 A 400 A 400 A 630A

6 Contactor rating in amp. 3x110amp 3x140amp 3x140amp 3x200amp 3x200amp 3x265amp

7Motor protection relay -MPR MPR MPR MPR MPR MPR MPR

( 2.5-5 A ) ( 2.5-5 A ) ( 2.5-5 A ) ( 2.5-5 A ) ( 2.5-5 A ) ( 2.5-5 A )

8 Timers 0-60 sec 0-60 sec 0-60 sec 0-60 sec 0-60 sec 0-60 sec

9Single phase preventor 415 v AC. A/P/R A/P/R A/P/R A/P/R A/P/R A/P/R

10 Control MCB SP. 6 amp SP 6 amp SP 6 amp SP 6 amp SP 6 amp SP 6 amp SP

11 Amp. Meter 0-150 amp 0-250 amp 0-250 amp 0-250 amp 0-400 amp 0-400 amp

12 CT,s ( -/5 amp ) 150/5 amp 250/5 amp 250/5 amp 250/5 amp 400/5 amp 400/5 amp

13Cable for supply side 3 1/2 core ALUMINIUM 95 sq mm 120 sq mm 240 sq mm 240 sq mm

2x120 sq mm

2x150 sq mm

14Cable for Motor side 3-core ALUMINIUM.

2x50 sq mm

2x70 sq mm 2x95 sq mm 2x95 sq mm

2x120 sq mm

2x185 sq mm

IMPORTANT - ALL THE POWER CONNECTION OF STARTER IN SIDE THE PANEL WITH SOLID BUS BARS 50 HP AND ABOVE.

VIDEO ON STAR - DELTA STARTER

160KVAPower of the transformer

500

KVA

250KVA48.0 KA =Icc downstream

the transformer

400KVA

630KVAMaine line (Alu or Copper)

800KVAa=alu (cu by default) a

1000KVALenght 5 m

1250KVACross section 800 mm²

1600KVA45.3KA45.3KA

2000KVA

2500KVASecundary level (Alu or Copper)

a=alu (cu by default) aLenght 10 m

Cross section 240 mm²

33.1 KA

third level (Alu or Copper)

a=alu (cu by default)Lenght 20 m

Cross section 1.5 mm²

Icc3 = 0.75 KA

Icc1 = 0.60 KA

Thank YouThank You

s. power engineering, plot no. 552, industrial area, phase ... · pdf filepower engineering,...

Documents