VAV servo valve torque motor

J

Thread Starter

jack

GAS TURBINE GENERATOR: LM2500 + SAC + HSPT

The difference is 1.4 between VSVDMD and VSVSEL, vsv cur ref is -38mA. Lead to torque motor null shift more than 15mA, after then shut down engine.

I want to know why current increase but VSVSEL and VSVDMD no any change? why has this protection?
 
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