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Two generators having 380v terminal voltage sink together at 11 kv bus after step up transformer how should I do the grounding?

Dear I have a chanies machine and they have different standards according to terminal voltage Mean to say @400 v terminal voltage they use contractor to ground the neutral Higher than that 6.6 kv NGR is used. Here I am on a site where the softwhere of avr card flash out over external fault...

Good morning waross And what if we have a mix load mean internal on phase to ground 220v for auxilary load and 11 kv for line star delta Thanking you

Good morning waross The load is not directly connected to the neural (380v) it is feeding the 11 kv star delta transformer Regards

Good evening everyone Dear I have a genset connected with hydel turbine having terminal voltage 380v and 860kw capacity. The neutral (star point) is not connected to the ground. What should I do to connect the neutral to the ground?? Ngr? Magnetic contractor ? Direct grounding?? I will be...

And sir how to know weather its pole slip??

Waross sir The generator is 850kw Two generators sync total capacity is 1.7 mw (same Fault on both generators) 85 vdc field voltage 166 A field current Hydel unit About 10 years old machine hardly one year working life there are only two cts in circuit one over star point and second on...

Thanks RRaghunath sir Sir how to investigate the boost mode operation of AVR.? The deexcitation command is auto generated with field breaker with nc contact.

Good evening Dear all I have an issue in excitation system The problem is when ever the unit gets shutdown over external fault The AVR card get burned (Flash out) but on normal shutdown the card works properly. What may be the possible resions for this? Protection on both ends of FCB is also...

Dear all I have a Plc of Mitsubishi in speed governor of small hydel unit The problem is it works only in grid mood (sinks only with already energised line from other station e:g only when the bus pt is energized) How ever when I switch off the grid line and want to run it over isolation mood...