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Automatic Voltage Stabilizers
Automatic Voltage Stabilizers
Donvey offers type AVR-14 Automatic Voltage Stabilizers employing servo control principle with unique features. These stabilizers are designed to meet the requirements of a majority of voltage control problems. The application of AVR – 14’s are limited only in cases where an instantaneous correction is a must. The stabilizing action needs a few seconds to cover the entire range.
- Autoconers, textile machines, Knitting machines.
- Information Technology and call centers.
- Computer and Microprocessor Controlled Equipment.
- Sophisticated research instruments used in Scientific, Medical, Agriculture, Educational, And other Research Institutions.
- Offset Printing Presses. Color Scanners, Processors, Phototypesetters, Photographic Equipment, Photo Copiers and Packaging Industries.
- Medical Equipment, X-ray machines, E.C.G Machines/Monitors. MRI, CT Scan etc.
- Defense Installations, LPTs, HPTs, Broadcasting and Telecommunication.
- Lifts, Escalator and Elevators.
- Central, Air-conditioning Plants, Processing Plants, Chemical Industries, Textile Industries.
- CNC Machines, Laser Machines and Moulding Machines etc.
- Commercial Buildings and Complexes.
- Complete Hospitals and Nursing Homes.
| Parameters | Air Cooled Stabilizers | Oil Cooled Stabilizer |
Nominal Output voltage |
415 Internally settable at 380v to 400v |
415 Internally settable at 380v to 400v |
Input regulation range |
310v - 480v or 340v - 480v |
360v - 460v or 340v - 480v or 310v - 480v |
Output voltage regulation |
1% of nominal voltage |
1% of nominal voltage |
Input frequency range |
47Hz - 53Hz |
47Hz - 53Hz |
Average correction rate |
48v/sec(L_L) |
48v/sec(L_L) |
Servo motor drive |
A.C synchronous stepper motor |
A.C synchronous stepper motor |
Short circuit protection |
HRC fuse at input |
HRC fuse at input |
Single phasing prevention |
Individual phase voltage sensing method |
Individual phase voltage sensing method |
Efficiency |
Greater than 97% |
Greater than 97% |
Electronic cut off |
|
|
Annunciation panel |
Input present, output normal, output high, output low and overload. |
Input present, output normal, output high, output low and overload. |
| Resetting indication | - | Visual for overload |
Overload resetting mode |
Manual / automatic after time delay at 2 -3 minutes. |
Manual / automatic after time delay at 2 -3 minutes. |
Stabilizer bypass |
Manual change over switch |
Manual change over switch upto 50KVA |
Output voltage indication |
Digital voltmeter with selector switch to read RY, YB, BR voltage |
Digital voltmeter with selector switch to read RY, YB, BR voltage |
- Voltmeters to indicate both input and output voltages. In case of 3 ph. Unit, provision is made for measuring ph to ph to neutral voltages.
- Facility for auto manual operation. This features enables the users to control the output voltage manually as and when required. This feature is extremely useful at site for checking the automatic operation of the stabilizer.
- Indicating lamp to show that the input voltage is beyond the range of correction for the unit.
- Output voltage may be set within a range of about 20 volts (line to neutral) under proportionate loading conditions and input voltage range shift.
- The output voltage accuracy is set for a stability within + 1% of the nominal value.
- Easily replaceable plug-in control card ensures fast replacement.
- Control card is printed on a glass epoxy board with workmanship of highest degree. Gold plated contacts ensure faultless contact and long life.
- Replacement of the card is easy.
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