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Basics of Electric Locomotive

Presentation ByDesign Centre, MSDPL,

Hyderabad

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Locomotives• Present Indian fleet consists Electric

and Diesel Electric Engines • Steam Engines are no longer used,

except for heritage trains • Engines are Locomotives popularly

called as “Locos" • All Indian Railway Electric

Locomotives work on 25 KV AC, 50 Hz Over Head Traction System Except in Mumbai Suburban area (1500 V DC)

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Our MCS System Suits To…

• Our system is suitable to all tap changer type locomotives

• Locomotives that can have our system are– WAG 5– WAG 7– WAP 4– WAM 4

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Schematic of Electric Locomotive

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CIRCUIT BREAKER

DJ

TRANSF-ORMER

TF1

TAP CHANGER

ASMGR

ARNO CONVERTER

1 - 3

STARTING CIRCUIT

C-118

RECTIFIER 1 RSI-1

MVSI -1

SL –1 SMOOTHING REACTOR 1

MVSL -1

LINE CONTAC-TOR L1

LINE CONTAC-TOR L2

LINE CONTAC-TOR L3

ReverserJ1

Forward/Reverse

CTF 1

Traction/ BrakingSelector

TM 1

TM 2

TM 3

H 01BOGIE 1

RECTIFIER 2 RSI-2

MVSI -2

SL –2 SMOOTHING REACTOR 2

MVSL -2

LINE CONTAC-TOR L4

LINE CONTAC-TOR L5

LINE CONTAC-TOR L6

ReverserJ2

Forward/Reverse

CTF 2

Traction/ BrakingSelector

TM 4

TM 5

TM 6

H 02BOGIE 2

QRSI 1

QRSI 2

QLM

QLA

Q 30

QCVAR

U V W965

966

967

960

N

QOA

+110 V

+110 V

+110 V

MCPA

BatteryCharger

BA

Battery

110 V

CCPT

CCLS

003

ZCPA

BN

700 TO CONTROL CIRCUIT

QOA QLM QLA QOP1 QOP2 QRSI1 QRSI2 QPDJ Q44+110 V

Safety Relays Dynamic Braking Resistor

DBR Grid

Loco Fitted with ARNO Converter

25 kV Over Head Supply

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CIRCUIT BREAKER

DJ

TRANSF-ORMER

TF1

TAP CHANGER

ASMGR

STATIC CONVERTER

1 - 3

RECTIFIER 1 RSI-1

MVSI -1

SL –1 SMOOTHING REACTOR 1

MVSL -1

LINE CONTAC-TOR L1

LINE CONTAC-TOR L2

LINE CONTAC-TOR L3

ReverserJ1

Forward/Reverse

CTF 1

Traction/ BrakingSelector

TM 1

TM 2

TM 3

H 01BOGIE 1

RECTIFIER 2 RSI-2

MVSI -2

SL –2 SMOOTHING REACTOR 2

MVSL -2

LINE CONTAC-TOR L4

LINE CONTAC-TOR L5

LINE CONTAC-TOR L6

ReverserJ2

Forward/Reverse

CTF 2

Traction/ BrakingSelector

TM 4

TM 5

TM 6

H 02BOGIE 2

QRSI 1

QRSI 2

QLM

QCVAR

U V965

966

960

N

+110 V

+110 V

MCPA

Battery

110 V

CCPT

CCLS

003

ZCPA

BN

700 TO CONTROL CIRCUIT

QOA QLM QLA QOP1 QOP2 QRSI1 QRSI2 QPDJ Q44+110 V

Safety Relays Dynamic Braking Resistor

DBR Grid

Loco Fitted with Static Converter

25 kV Over Head Supply

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Power Circuit Incoming

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Power Circuit Traction Motors

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Power and Auxiliary Circuit

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Auxiliary Circuit

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Auxiliary Circuit

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Power and Auxiliary Circuit

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Traction Control Circuit

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A normally closed contact

A normally open contact

Programmable Switch with 4 positions 0,1,2,3

Relay contact with a time delay

Time Delay Relay

Closing delay

Opening delay

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Logic Control Circuit

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Auxiliaries Control Circuit

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Programmable Switches

• Position 0 Both MVMT1 and QVMT1 eliminated

• Position 1 Normal• Position 2 QVMT1 in service

and MVMT1 eliminated• Position 3 MVMT1 in service

and QVMT1 eliminated

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Interlocking• To run the Compressor

– 3 Phase supply is available and is within limit

– 5 seconds have passed after the DJ closing

– Reservoir Pressure is below the set limit– BLCP/BLCPD key is switched on – The Compressor is not bypassed by Driver

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Interlocking

BN

700

C101 COIL

BVQ100

BLCP

BL Key 700

BL

Key

BL

CP

DJF

B

BV

CPU

C101 COIL

BN

C101 = BL Key && BLCP && ((DJFB&& 5 sec delay)|| BV) &&RGCP

Software Logic

RGCP

RG

CP

HCP

HCP

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List of Relays (Eliminated)S No RELAY DESCRIPTION

1 Q118 Relay for supervising auxiliaries with 5 second opening delay

2 Q44 High voltage circuit breaker (DJ) tripping relay

3 Q45 DJ resetting relay

4 Q100 Interlocking relay of the auxiliaries (5 sec time delay to pick up).

5 QTD 105 Time delay relay for C-105.

6 QTD 106 Time delay relay for C-105.

7 Q51 GR regression relay

8 Q52 Notch to notch relay to GR.

9 QV60 DJ open / close signaling relay

10 QV61 Battery charger output signaling relay.

11 QV62 Tap changer at 0 signaling relay.

12 QV63 Rectifier group fuse blown signaling relay

13 QV64 Control circuit ready (loco ready) signaling relay.

14 Q48 Relay for sanding with opening time delay

15 Q49 Synchronizing relay for tap changer for MU operation.

16 Q50 Relay for control, CTF, C145 and DJ (loco ready).

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List of Relays (Eliminated)

S No RELAY DESCRIPTION

17 QTD 107 Closing Time delay relay for starting blower motor

18 QTD 109 Closing Time delay relay for starting blower motor

19 Q120 Time delay relay for alarm chain pulling.

20 Q46 Tap changer protection relay (stuck between notches)

21 QVLSOL Relay for trailing loco fault indication lamp.

22 QRS Auto regression relay for breaking (Emergency break).

23 QWC Weight compensation relay (starting with field shunting).

24 Q30 No OHE voltage relay.

25 QCVAR ARNO 3 phase output checking relay.

26 Q20 TM over voltage relay.

27 Q119 Relay for unloader valve.

28 QCON Relay picks up after SI output fully ramp up.

29 QSIT Protection relay for SI.

30 QD 1,2 Wheel slipping detection differential relay.

31 QF 1,2 Over load (current) relay for dynamic braking

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List of Relays (Existing)

S No RELAY DESCRIPTION

32 QLM Over load relay for Transformer TFI primary

33 QOA Auxiliary circuit earth fault relay.

34 QOP 1,2 Power circuit (rectifier output) earth fault relay.

35 QPDJ Pressure switch for DJ.

36 QRSI 1,2 Over load relay for silicon rectifier

37 QLA Over load relay for auxiliary output winding of transformer.

38 QBIR Relay for alarm chain pulling buzzer.

39 QE Over load relay for braking excitation.

40 QVMT 1,2 Airflow detection indication relay for TM blowers 1,2.

41 QVSL 1,2 Airflow indication relays for SL blower.

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