AVR R220 Generator Spare Parts AVR R220 for Leroy Somer Alternator 
Brush Type 3 Phase AVR R220 Voltage Regulator AVR For Generator is a half-wave phase controlled thyristor type Automatic Voltage Regulator and forms part of the excitation system for a brushless generator. In addition to regulating the generator voltage, the AVR circuitry includes under speed and sensing loss protection to ensure safe, reliable control of the generator. Positive voltage build up from residual levels is ensured by the use of proficient semiconductors in the power circuitry of the AVR. Which is linked with the main stator windings and the exciter field windings to offer closed loop control of the output voltage with load regulations of +/- 1.5%          

Specific Introduction:

1.The regulator monitors the exciter excitation current as a function of the alternator output voltage.

2.Very simple in design,the alternator with shunt excitation has no sustaining short-circuit capacity.

3.Voltage Regulation:around +/-0.5%

4. Voltage supply/sensing range 85 ~139 V (50-60Hz)