1、SUITABLE GENERATOR: This AVR board is applicable to phase compound excitation 75KW to 300KW and the third harmonic excitation three phase carbon brush type generator. 2、LOW FREQUENCY PROTECTION: Our brush generator voltage regulator board can adjust the voltage, stability, and also has a low frequency protection setting. 3、VOLTAGE SLOW BUILD UP: The brush generator voltage regulator board has a voltage slow build up function with a large adjustable excitation current of 15A. 4、CONTROL MODE: The brush generator voltage regulator is controlled by parallel shunt with 400VAC voltage and 50 or 60Hz frequency. 5、MADE OF ABS MATERIAL: The generator voltage regulator module is made of ABS material with excellent craftsmanship, which can be used stably.