TRANSFORMER WITH BUILT IN HT AVR

HT TRANSFORMERS WITH BUILT IN AUTOMATIC VOLTAGE STABILIZER

It is a very altogether different product basically a combination of Standard Distribution Transformer and HT Automatic Voltage Regulator. The Standard Transformer with OLTC can correct limited voltage variation in certain steps where as Built-in operates steplessly monitoring the output voltage continuously.
The incoming fluctuating H.T. supply is initially stabilized and then fed to the step down transformer and thereby the L.T. Output is maintained within ±1% accuracy. Built – in has the following advantages:

  • Space saving
  • Reduced Installation cost
  • More efficiency
  • Reduction in Electricity Bill

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STANDARD SPECIFICATION
Capacity :Up to 15000 KVA
No. of Phases :3 Phase
Frequency: 50 Hz.
Voltage Class :11,22,33 KV
Voltage Range :+ 20% to - 30% (or any voltage range as per site client requirements)
Technology: Stepless linear regulator type (Vertical rolling contact type)
Insulation :Class ‘A’
Vector Group :Dyn 11
Duty Cycle :Continuous
Winding :Copper Wound
Terminals :As per required
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Linear Rolling Contact Type Regulator

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Step Down & Buck/Boost Transformer Assembly

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Carbon Roller Assembly

STANDARD FITTINGS
Rating & Diagram plate :Earthing terminals
Lifting lugs :Thermometer pocket
Oil Conservator with drain plug :Air release hole with plug
Oil Level indicator :Explosion vent with diaphragm
Top-filter Valve: Inspection cover.
Silica gel breather :Drain –cum-bottom-filter valve
Cooling radiators :Uni / Bi- directional rollers
OPTIONAL FEATURES
Buchholz relay with alarm and trip contact Magnetic oil level gauge with alarm contact
Pressure Release Valve Marshalling box to house O.T.I. and W.T.I
Cable Box on H.T. Side Cable Box on L.T. Side.
Oil Temp. Indicator with alarm & trip contact
Winding Temp. indicator with alarm & trip contact Electronic Automatic Voltage Controller
ADVANTAGES
More efficient
Non toxic
Highly safe
Non flammable
Space saving by placing near the load end
Low Noise
Low Maintenance
Can be supplied with off circuit links
TECHNICAL ADVANTAGES
Very Easy to maintain – No Specialize Manpower is required.
Undistorted output characteristics ie. No wave from distortion.
Moving parts on L.T. side and its mass is extremely low, only few lb-inch torque.
Energy savings.
High efficiency (about 99%) and minimum no load losses.
Simplicity and flexibility of design
On load stepless voltage variation
Long service life
Impulse tested
Regulating coils are wound with rectangular conductors on their edge, thus giving high mechanical strength compared to other designs.
Low replacement cost.
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