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i am working on an land oil rig having 5 cat generators controlled inside a vfd house by ross hill ac module. these generators voltage is 600 Vac.
the generators when in sync are sharing equally the load and the voltage is steady on 600 volt. once the load is increased by the use of a tool affecting the total load like a drawworks hoisting a heavy load, the load is increased on all generators the same. but the issue is I am having also a increase in voltage from 600 to a range of 20 to 40 volts which is making other tools trip. the voltage should drop on a load increase; thus the ac module stabilized it on 600 volt automatically. does any know what is the problem here? my frequency is remaining same 60 hz. i checked everything concerning the speed of the engines and their throttle signal they are ok.
please if anyone can help
thank you
the generators when in sync are sharing equally the load and the voltage is steady on 600 volt. once the load is increased by the use of a tool affecting the total load like a drawworks hoisting a heavy load, the load is increased on all generators the same. but the issue is I am having also a increase in voltage from 600 to a range of 20 to 40 volts which is making other tools trip. the voltage should drop on a load increase; thus the ac module stabilized it on 600 volt automatically. does any know what is the problem here? my frequency is remaining same 60 hz. i checked everything concerning the speed of the engines and their throttle signal they are ok.
please if anyone can help
thank you