Electronic Servo Controlled Three Phase Voltage Stabilizers are suitable for continuous duty operation and equipped with auto or manual selector switch. These Voltage Stabilizers can function in a temperature range varying from 0 degree C to 40 degree C. These Voltage Stabilizers require 340 V - 470 V AC to operate efficiently in 3 phase mode of operation. Electronic Servo Controlled Three Phase Voltage Stabilizers perform at a line frequency range of 47-53Hz.