Servo Stabilizer

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Specifications of Servo Voltage Stabilizer

JMS SERVO STABILISER consists of a continuously variable auto transformer operated by an AC steps synchronous motor, a buck-boost transformer and IC based control circuit.The control circuit continuously monitors the output voltage and looks for error in the output and is immediately corrected by witching on the servo motor in appropriate direction in order to induce the required voltage through the series connected buck-boost transformer. As soon as the voltage reaches the desired level the motors is switched off. The High and Low indicators on the panel indicates the status of incoming mains supply. In the manual mode the voltage could be increased or decreased by pressing the switch in either director. The output adjustment facility has been provided adjust the output voltage as per requirement.

Capacity 1 KVA to 20 KVA 5 KVA to 600 KVA
Input Voltage Range 160V-270 V / 160V-300V / 140V-300V 360V-470 V / 340V-470 V / 300V-470V / 270V-470V
Nominal Output Voltage 220/230V 400/420V
Output Voltage Accuracy ± 1% ± 1%
Line Frequency Variation 47Hz-53Hz 47Hz-53Hz
Effect of Power Factor None None
Wave Form Distortion None added None added
Voltage Meter Digital/Analogue Digital/Analogue
Response Time 10 m s. 10 m s.
Speed of Correction 20V / Sec. 20V / Sec.
Inbuilt Frature HV cut-off, LV cut-off, O/L trip,
Time delay, Operating mode (auto/manual)
Cooling Air/Oil Air/Oil
Efficiency 98% 98%
Protection Automatic Switch-Off against: Under / Over-Voltage,
Over-Load & Short - Circuit, Single Phasing
Optional Features Molded Case Circuit Breakers,
Electronic Audio Alarm, Ampere Meter with CT's,
By pass switch, RF Interference with filter, Digital
Panel Meter, High/Low Voltage cut off. Salient Features