• L D Power Transformers Private Limited

Servo Voltage Stabiliser

L D Power Transformers offers a range of Servo Voltage Stabilisers. Voltage fluctuation is a common phenomenon in every part of the country. Automatic voltage controller (stabiliser) is an equipment to obtain constant voltage tram fluctuating supply system. The industrial units running round the clock usually face the problem of low and high voltage. 90% of industrial load is of motors. Electric motors draw considerably high current at low and high voltage. This higher current affects the electric motors (particularly smaller capacity motors up to 7.5 HP) in these ways: higher current produce higher losses in electric motors, which cause premature failure of winding. Higher current produce higher losses in electric motors which cause premature failure of winding, these higher current of electric motors also increase losses of cables, switches, transformer and other associated equipments. This higher current of electric motors require 15-20% higher setting of over load relay to avoid frequent tripping of motor's starter. Higher setting of over load relays have very little safety margin against single phasing and over loading conditions. The installation of the stabiliser and maintaining 390/400 V, the motor will operate smoothly drawing 15-20% lesser current and corresponding the relay setting can be reduced by 15-20%. In case single phasing occurs, the relay will trip in 40-50 seconds. The motor can withstand the high current for this period and will be safe. Also, the relays, contactors, switchgears, etc., incorporated with the motor will be safe. These servo stabilisers are available in a wide range and various models.