atlas copco ga55 tripping main breaker randomly
(Rock Hill SC USA)
My GA55 is tripping main breaker when it starts-up from the unit going to stand-by stoppage for low demand.
It's random, may not trip for month, may do it three times in a week.
The GA55 will start-up using the same contactors after the power lost and run like nothing was happen, and will continue to run 24/7 until the next stand-by for low usage or no demand time outs.
All the contacts for new.
Amps are all normal when running. Star amps are good during start-up, I don't see any other contact pull in during this period.
Programming/software? Timing too slow during Star to Delta?
210 Mt. Phillips St
Rock Hill, SC 29730
GA55 starting problems
by Graham Wilson
I am seeking technical guidance regarding the difficulty of starting up a 55KW Air Compressor running using a 150KVA Generator, details as follows:
FG Wilson model P165 Prime Power diesel generator rated at 120KW 0.8PF 400 Volt 50Hz.
Atlas Copco model GA55 FF Rotary screw compressor with VSD. Motor rating is 55KW, 119A flc at 400 Volts.
There is an additional base load connected to the generator of maximum 60KVA mixed inductive loads.
The main issue being that the compressor is factory fitted with a Star/Delta starter. The resultant high value starting current causes the generator to overload and at times, stall. I am seeking advice on a solution to the problem.
I look forward to hearing from you.
Frequency of changing oil separator element of GA 55+
by Mayukh Chakraborty
What is the avg time of changing a Oil separator element of GA 55+ compressor?
Our local dealer change the oil separator element of the GA55+ compressor with a 2 month frequency, is it really required?