Automatic electric ltd. Is engaged in manufacturing electrical instruments, power systems and instrument transformers in india. The company has been accredited with an iso 9001 certification. Servo-controlled automatic ac voltage stabilizers of `ae` make are of `electro - mechanical [ems] type. The voltage stabilizers are used to control voltage variations in modern machinery to protect the equipments. The following are its unique features:
1. dimmerstat [continuously variable voltage auto transformer].
2. ac step-synchronous motor.
3. solid state electronic control circuit.
4. two switching triacs.
5. movs for surge suppression.
6. waveform distortion - nil.
7. 98 - 99% efficiency [achieved by optimum design & by use of imported hi-quality crgo laminations & copper of 99.9% purity].
8. speed of correction up to 70v/sec.
9. response time - less than 20 m/sec.
10. immune to load pf & supply frequency variations.
11. power loss 2% max.
12. duty cycle continuous.
13. life expectancy - 20 - 25 years.
14. considerable short time overload capacity.
15. output voltage setting [by potentiometer in auto mode & by `raise` / `lower` push button in manual mode].
16. operation - auto or manual.
17. led indications for input voltage `high` / `low`.
18. metering [analogue or digital] - ac voltmeter with / without selector switch.
19. non-standard requirements can be catered to, such as ac ammeter, frequency meter, phase sequence meter, single phasing preventer, stabilizer by-pass arrangement, etc.
20. indoor, floor mounting type instrument
21. air - cooled / oil cooled / air - oil cooled.
