06-16-2012 04:46 AM
How do I find the number of poles on the exciter armature of a Kato 6.6kV PMG generator?
We are fitting the control system for the generator with a Basler DECS200 AVR.
The client requires diode failure monitoring.
The Basler DECS200 is able to detect diode open circuit and diode short circuit.
The setting in the configuration software of the Basler DECS200 requires the pole ratio of the exciter armature to the rotor armature.
I have the number of poles for the rotor armature but I cannot find any data on the number of poles in the exciter armature.
06-17-2012 01:15 PM
Get your serial and call or email Kato. You may also find that Basler may be able to offer some help for the setting as well. Or, if the generator is somewhere you can look at it, take off the rear cover and count the number of coils, the PM stator is usually the rearmost piece on the generator.
That being said, be aware that when done per the Basler calculation you may get nuisence trips. Most of the time I just disable the protection, look at the ripple level and work it from there.
06-17-2012 05:54 PM
We will try to send an email. The back cover has been off and we were not able to identify the number of poles, but maybe we can try that again. It is the exciter armature, which supplies the diode rectifier assembly.
A further problem is that the diodes are in a block and it seems not possible to test the settings by shorting or open circuiting a diode.
Thanks for you help.