Required- Design modification in LHB coaches 750 V junction box

Electrical Staff Maintaining Shatabdi Express

Electrical Safety Week-2009

Scroll Compressor failures

Some obseravtions regarding Scroll compressors:-

1.They were provided to replace the reciprocating Bristol compressors which had high failure rates.
2.Even scroll compressors in 2003-04 LHB coaches are having FRPCPY of over 20.
3.Howrah division has pretty less FRPCPY since their coaches are new.
4.Coaches of 07 and 08 series have had less failures in Mumbai Divsion.
5.Scroll compressors when fitted in SGAC coaches are found to work well.
6.None of the scroll lasts the life of 8 years. They fail in first three years of years.
7.Failures are comparitevy less reported in NR and ER.

Now the question is why they fail so much :-
Some contributing factors are:-
1.Bypassing of LP switches in order to "push" cooling.
2.Choking in the 'solenoid' which is redundant in the system.
3.Bypassing of sensors after failing of sensors.
4.Choking of Dryer.
5.Leakage of oil from capillary, and no provision of top up.
6.Overcharging of gas (it requires not > 3kg for LEEL and 3.5 kg for Sidwal RMPUs)

Pre Summer Drive launched and completed .

How we can live upto the expectations of our customers

A tired pasenger enters a train after all the tiresome road journey he took to reach the station. He sighs with relief as he enters the pre-cooled coach from the ambient 40 degrees. He is further pleased to find a clean coach with all the bright illumination and silent but effective fans inside the coach. The coach attendent greets him to his delight and offers fresh linen. The passenger is assured by the coach attendant that he will be woken up at the desired station by him. The passenger is snoring now into a sound sleep. The sleep that he needs, the sleep he might remeber his best ever.
Are we doing this? Where we need to fine tune ? Lets think, and make the coaches of Mumbai division of Western Railway a the most pleasant ones.