HT DISTRIBUTION TRANSFORMER With A.V.R.

HT DISTRIBUTION TRANSFORMER With A.V.R.

MAESTRO Make Copper wound, HT AVR suitable for indoor/outdoor installation, copper wound HT AVR system is a revolutionary landmark in the industry when it comes to voltage regulation and stabilization. Even after the installation of standard distribution transformer the problem of low/high voltage on the LT loss of a plant. The standard off-circuit tapping of transformers can correct limited voltage variation and cannot regulate the voltage while in ‘on Load conditions. We have developed state of the art technology HT Automatic voltage regulator that operates on load, sleeplessly & gives stabilized voltage on the HT side. The fluctuating voltage from Grid is initially controlled by the HT AVR and then fed to the transformer resulting in the constant HT. Output within +/- 1% accuracy and the biggest advantage being its robust design: Lesser losses & more efficiency make the distribution transformer to utilize up to 100% capacity

Fitting And Accessories

Standard fitting recommended in IS 2026-1977 are provided

1. Rating and diagram plate.
 
2. Earthing terminals-2 Nos,
 
3. Ufting lugs.
 
4. Oil level Indicator (Plain)
 
5. Drain-cum bottom filter valve with plug.
 
6. Oil filling hole with plug on conservator.
 
7. Oil conservator with drain plug.
 
8. Air release plug.
 
9. Silica gel air breather.
 
10. Bi-directional flat rollers.
 
11. HV terminals-outdoor bushings.
 
12. LV terminals-outdoor bushings.
 
13. Radiators.
 
14. Filter valve with plug.
 
15. Thermometer pocket.
 
16. Oil temperature indicator.
 
17. Externally operated off circuit top
 
changing switch
 
18. Explosion vent.
 
19. Sampling value
 
(for 2000 KVA & above transformers only)

Testing For Quality Assurance

Our works is equipped with all requisite testing facilities for quality assurances. Each transformer is tested for all tests confirming to IS:1180 and IS 2026 by qualified and experienced engineers with precision grade instruments. The tests involved are:

1. Measurement of insulation resistance.
 
2. Measurement of voltage ratio.
 
3. Check up of vector group and polarity.
 
4. Included over voltage test at double voltage and double
 
frequency. 5. Separate source high voltage test of HV side and LV side.
 
6 Measurement of on load losses and magnetizing current.
 
7. Measurement of load losses and impedance voltage
 
8 Measurement of zero sequence current.
 
9. Measurement of HV winding and LV winding resistence.
 
10. Measurement of temperature rise of winding and oil of transformers at full rated load.
 
11. Pressure and vacuum testing of transformer for permanent deflection of body.
 
12. Check up of dielectric strength of transformer oil. Test certificate are issued with each transformer.)

Accessories on Request

1. LV and HV cable boxes

2. Winding temperature Indicator (WT)

3. Buchholz relay

4. Magnetic oil level gauge

5. Marshalling box.

6. Disconnecting chamber

7. Oil temperature indicator with electrica contacts (OT)

8. Pressure relief valve

Additional Testing

1. Short circuit with stand fest.
 
2. Impulse voltage with stand test. These are the type tests and can be arranged at C.PRI. BHOPAL/BANGALORE and other recognized laboratories on payment if required by the customer

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