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Servo voltage stabiliser.

Also written voltage stabiliser, servo stabilizer, AVR stabiliser, Voltsafe.

Stabiliser or UPS?

Both, on a bad supply. A servo stabiliser corrects the mains voltage continuously with a motor-driven transformer, holding a wandering 180 to 260 volts at 230, but it has no battery and stops with the supply. A UPS carries the load through the outage but only corrects within a narrower window. Put the stabiliser before the UPS where the voltage swings widely, and the UPS alone where it does not.

Numeric Voltsafe PLUS Single Phase Air Cooled 1-20 kVA Range, a Servo voltage stabiliser part supplied by Data Systems
Servo voltage stabiliser in the catalogue: Numeric Voltsafe PLUS Single Phase Air Cooled 1-20 kVA Range, NUM-VOLTSAFE-PLUS-SINGLE-PHASE-AIR-COOLED-1-20-KVA-RANGE. Catalogue photograph.

Published by Data Systems, network material suppliers in Secunderabad, Hyderabad since 1984, which is 42 years of experience with these parts. Written from the standards named above. Last checked 2026-08-19. How we check this, and what we got wrong.

Data Systems, a network material supplier in Secunderabad, Hyderabad since 1984 with branches in Vijayawada and Visakhapatnam, supplies Servo voltage stabiliser across India through official channels. Send a list, get one quote.

Voltsafe PLUS Single Phase Air Cooled

Voltsafe PLUS Three Phase Air Cooled

Voltsafe PLUS Three Phase Oil Cooled

Where it is used

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