WDG-3A – इंडीकेशन लैम्प सर्किट (Indication Lamp Circuit )

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WDG-3A – इंडीकेशन लैम्प सर्किट (Indication Lamp Circuit )

January 4, 2021, 12:12 AM

Indication Lamp Circuit

This circuit is provided in the diesel loco to give warning/indication to loco pilot in case of any failure in various system/circuit , a LED (Light emitting diode) indication panel is provided on both control stand and control panel having following indication lamps –

One electrical bell (ALG) provided on the right side control panel for audio warning and Buzzer is provided in control stand for wheel slip.

Low Lube Oil -Alarm gong is also ring with this indication, it means lube oil pressure is below 1.3 kg/cm² and OPS dropped. Trouble shoots accordingly. Lamp will extinguish when OPS picks up.

Hot Engine -Alarm gong is also ring with this indication, it gives following information –

1. If bell is ringing with indication and engine is run position, it means ETS3 is picked up and water temperature is 940 . Cool the water.

2. If bell is ringing with indication and engine is shut down, it means LWS is operated and water level is below one inch. Trouble shoots accordingly.

Ground Relay – Alarm gong is also ring with this indication, engine speed will comes to idle and power cut off, it means earth fault in power circuit. After trouble shooting, lamp will extinguish when GR reset knob pressed.

Wheel Slip -Buzzer is also sound with this indication, lamp will extinguished after trouble shooting.

Electric Brake Warning -Whenever this lamp will glow it means the DMR is de-energized. After necessary trouble shooting lamp will extinguish when DMR picks up.

Auxiliary Generator Failure Lamp – Battery ammeter shows discharging side with this indication, it means Auxiliary Generator fails. Whenever auxiliary generator is giving out put lamp will extinguish and Battery ammeter shows charging side.

Crank Case Exhauster Failure Indication Lamp – This lamp will glow when CCM is not working, Lamp will extinguished when CCM starts working.

Over load: – When over current flows in Alternator field winding more than 280±5 GFOLR will energize. Over load lamp will glow on front panel and alarm bell will ring. Whenever GFOLR reset this lamp extinguished.

Cranking Tip Weld:- This lamp is provided on front panel . When any cranking contactor welded this lamp will glow continuously and alarm bell rings. Shut down the diesel engine, open battery knife switch and remove welding.

CYM:- This lamp is provided on front panel and it glows up to 4th notch. After 5th notch cyclonic motor starts and this lamp is extinguished.

Rectifier – This lamp is provided on front panel. It glows when VAPR operates at this time bell will ring, GFC will drop and engine speed comes to Idle.

Work the Loco With Out Indication Lamp i.e. Indication lamp circuit is faulty –

1. If bell rings and engine get shuts down

a) If keeping ECS on idle, ringing will not stop it means LWS operates or in WW GOV shut down plunger project out.

b) If keeping ECS on idle, ringing will stop it means engine shut down due to low lube oil pressure (only in EH Gov. Loco.)

2. Incase of hot engine there is no effect on engine, only bell rings.

3. When GR/GFOLR is operated, bell rings and engine speed will come to idle with all indications related to GR/GFOLR.

4. Incase of wheel slip, buzzer will sound with load meter fluctuation.

5. Incase of AG failure, BA will shows discharge side.

6. If crank case exhauster motor does not work, no smoke from its exhaust pipe.

7. When DMR is de energized, engine speed comes to idle and load meter will show Ist notch current, engine speed will not increase.

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This entry was posted in 2 Railway Employee, 7 Study Material & Guide, Diesel Loco, WDG - 3A Locomotive, Railway Employee