Presentation By:

Ankur Mahajan

Tr. J.E. Electrical Design

LHB HOT BUFFET AC COACH

INTRODUCTION

Linke Hofmann Busch (LHB) coaches are the

passenger compartments of Indian Railways that

have been developed by Linke-Hofmann-Busch of

Germany.

Produced by Rail Coach Factory in Kapurthala, on

the Broad Gauge (1676 mm) network of Indian

railways, since 2000.

TYPES OF LHB COACHES

LGS = Second class self-generating

LSCN = Second class 3-tier sleeper (72 berths)

LWACCW = AC2 Air-conditioned 2-tier sleeping-car (52 berths)

LWACCN = AC3 Air-conditioned 3-tier sleeping-car (72 berths)

LWFAC = AC1 Air-conditioned first class sleeping-car (24 berths)

LWFCZAC = Air-conditioned executive chair car (56 seats)

LWLRRM = Luggage/generator/brake van

LWSCZAC = Air-conditioned chair car (78 seats)

LWSCZ = Chair car

LWCBAC = Air-conditioned pantry/kitchen/buffet car

BLOCK DIAGRAM

FLOW CHART

Pump1, Pump 2

with MCB 1-1.6 A

Local Main Supply,

Fuse 80A

Supply Net 1

Main Fuse 80A

Main Contactor S1K02

Main Transformer

750/415 V

Main Fuse 100A

Insulation Relay

MMR, 24V DC

MMR

Battery

Charger

Battery Diagnosis ,6A

fuse

Light control, 10A fuse

Supply Net 1

Main Fuse 80A

Main Contactor S1K01

Main Transformer

750/415 V

Main Fuse 100A

Insulation Relay

MMR, 24V DC

415, 3Phase

230V, 1 Phase

RMPU 1

FLOW CHART(CONT.)

110V, AC

1 KVA Xmer

Coach Light with

10A fuse

RMPU1

BOOTLE COOLER ,400W

CHIMNEY-3,200W

INSECT KILLER, 20W

HOT DISP., 1.5KW

HOT DISP., 1.5KW

BURNER-4,9.9KW

HOT CASE,1.5KW

INSECT KILLER, 20KW

WATER BOILER-2&3, 3KW

BURNER-2,2KW

REFRIGERATOR, 300W

RMPU2

WATER BOILER-1, 3KW

BURNER-1&3,2KW

DEEP FREEZER, 330W

CHIMNEY-1&2,200W

WATER FILTER,200W

OTG-1&2, 1.2KW

EXHAUST FAN-2NO’s

UNDER FRAME WIRING

From To Cable Size Colour

FJB FJB 120 R,Y,B

95 BLK

2.5 CH

SBC FJB 50 R,Y,B,BLK

SBC BULK SUPPLY 25 R,Y,B,BLK

SBC TRANSFORMER 25 R,Y,B,BLK

50 R,Y,B,BLK

SBC PUMP 4X1.5 R,Y,B,GNYE

2X1 CH

SBC LEVEL SENSOR 3X1.5 W,CH,R

UNDER FRAME WIRING

SBC +VE FUSE 25 CH

10 CH

1.5 CH

BATTERY -VE FUSE 50 W

BATTERY +VE FUSE 50 CH

1.5 R, BLK

-VE FUSE SBC 25 W

10 W

1.5 W

SBC SPEED

SENSOR

3X1 SHIELDED W,C

3X1 SHIELDED W,C

3X1 SHIELDED W,C

3X1 SHIELDED W,C

60 KVA TRANSFORMER

It is Step Down Transformer

Configuration- STAR -STAR

Step Down 750 V to 415 V

MONO BLOCK SELF PRIMING PUMP

ASSEMBLY AND WATER TANKS

Pumps- 0.375 KW, 415V, 3 Phase

LOCAL MAIN SUPPLY, 415 Volts

Used to provide external supply to the coach for pre-cooling the

coach standing in the shed

WHEEL SET EARTHING

Allow the leakage currents to earth through wheel, so as to

protect axle bearing.

BATTERY, 70Ah

BATTERY BOX

+ve FUSE BOX

9 x12V Cells of VRLA Battery

-ve FUSE BOX

Inter Vehicular Coupler

Seven pin plug.

Three pin for three

phase- R , Y, B

One Pin for

Neutral

One pin for Earth

Two control pin for

safety loop

SWITCH BOARD CABINET

Disconnecting and earthing device

Regulated battery charger

Emergency battery charger

Contactors and relays

1 KVA transformer for lights

Wheel skid protection

24 V dc to dc convertor

Microprocessor based controller

DISCONNECTING AND EARTHING DEVICE

6.5KW, REGULATED BATTERY CHARGER

2.5 KW, EMERGENCY BATTERY CHARGER

CONTACTORS AND RELAYS

1 KVA, SINGLE PHASE STEP DOWN

TRANSFORMER FOR LIGHTS, 220/110V

WHEEL SKID PROTECTION

PANTRY EQUIPMENTS

Insect Killer

Water BoilerRefrigerator

Chimney

Electric Hot plate

Cooking Table

Bottle Cooler and Deep Freezer

Capacity 230Ltrs

Temp. range -18 to-25

degree cent.

Rating 330watt

Operating Voltage 230 V

Capacity 90Ltrs

Temp. range 3 to 5 degree

cent.

Rating 400watt

Operating Voltage 230 V

Deep Freezer Bottle Cooler

Hot Case Water Boiler

Capacity 140 meals

Temp. range 30 to 110 degree cent.

Rating 1.5 KW

Operating Voltage 230 V

Compartments 03

Capacity 30Ltrs

Temp. range 40 to 110

degree cent.

Rating 3 KW

Operating Voltage 230 V

Electric Hot Plate

Rating 2 KW (4 No.)

5 KW (1 No.)

Rotary Switch 16Amps

63 Amps

Operating Voltage 230 V

NEW DEVELOPMENTS

EXHAUST TYPE CHIMNEY FOR

LHB PANTRY

• CHIMNEY PROVIDED EARLIER HAD NO

EXHAUST TO THE ATMOSPHERE

• INEFFECTIVE TO REMOVE FUMES &

SMOKE – POTENTIAL FIRE HAZARD

• CHIMNEY WITH EXHAUST ON COACH

ROOF DEVELOPED

• REGULAR CUT-IN FROM 2014-15

MODIFIED CHIMNEY

CHIMNEY HOOD

EXHAUST

EXHAUST

AIR DUCT

COVER WITH LOCKS PROVIDED ON ELECTRICAL PANELS OF HOT

PLATES TO AVOID OPERATION BY UNAUTHORISED PERSONS.

MODIFICATION IN HOT BUFFET CAR

ROAD AHEAD

• TO ENHANCE SAFETY RESISTIVE HEATING FOR

COOKING/FRYING IS REPLACED BY INDUCTION

HEATING BASED COOKING/ FRYING

• PO FOR TWO COACH SETS PLACED

• MATERIAL EXPECTED IN MARCH-2015

DEVELOPMENT OF INDUCTION

TYPE HEATING IN HOT BUFFET

CAR

POSITION RESISTIVE HOT PLATE

REPLACED BY INDUCTION HOT PLATE

LEFT HAND SIDE 2KWX2 2KWX2

CENTRE 2KWX2 2KWX2

RIGHT HAND SIDE 2KWX11.1KWX3

7KWX1 (3 PHASE)2KWX1