rectifier duty transformers
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We manufacture Cast-Resin Dry Type Transformers upto 3000 KVA; 33KV class as per Indian & International Standards i.e. IS, IEC & ANSI etc. Our transformers are design to withstand high humidity, temperature, adverse service conditions & short circuit levels & all these make our products an ideal choice. Designing, selection of raw materials, state of the art – Casting Plant, in house testing facility & highly experienced manpower make our products very reliable & cost competitive. Maintenance FreeDue to encapsulation of coils with cast resin the coils dimensions are stable & no coil tightening is required to maintain the short circuit strength. Also no check of oil level and electrical insulation/oil is required. Non- HygroscopicIn cast-resin dry-type transformers, the complete encapsulation of primary and secondary winding in epoxy resin prevents penetration of moisture into windings. The cast resin offers very good protection against adverse ambient conditions. These transformers can work without disruption of service at 100% humidity. Non Inflammable and Self ExtinguishingDue to high quality insulation material the transformer is practically non-inflammable by an electrical arc, special fire protection measures are not required. Resistant against Temperature FluctuationThe insulation material used is glass fibre reinforced with epoxy resin of class 'F' which can withstand wide temperature variation. Higher Impulse StrengthContrary to the conventional dry type transformers the cast coil transformers are better in respect of impulse voltage withstand strength. Higher Short Circuit StrengthHigher dynamic short circuit withstand strength as compared to oil immersed and conventional dry type transformers because of fibre glass reinforced epoxy encapsulation. Free of Partial DischargesNo partial discharges can occur during operation. Instant SwitchingDue to the high grade insulation material, coils are non hygroscopes & the transformer can be switched on directly without pre-drying even after a long period of service interruption. No Leakage or Pilferage of OilAs cast resin transformers are solidly cast, problem associated with oil filled transformers like oil leakage and pilferage of oil is completely avoided. Saving in SpaceThese transformers are generally smaller in dimensions and lesser in weights. The construction and installation cost for the sub-station can be reduced by adopting dry type transformers. Eco-FriendlySince no oil is used in these transformers, there are no chances of contamination of ground water due to oil leakage. Saving in Civil work cost and LT cablesWithout fire or danger of explosion, it is possible to place the transformers near to the load centre. Also, these transformers do not need construction of special fibre brick walls or oil pits, which reduces the overall civil works. Additionally, since LT cables are not required, thers is also saving in cost on account of expensive cable laying works. Public Places and High rise buildings Shopping Malls Railway Fixed traction installation Underground Cranes Seaports and Offshore platforms Drives Gas ,Turbines , Generators and Drilling system Solar Application Mining Ranging up to 3000 KVA Capacity Up to 33 KV Class Three-Phase, 50 / 60 Hz Single / Dual Ratio Naturally Cooled (AN) or Forced Air Cooled (ANAF) Sheet metal enclosure with vents for air circulation IP-23 or as per customer's requirement Accessories / Fittings as desired by customer Insulation Class F / H, others on request Applicable Standards IS:11171, IEC:60726 Tap Changer: Tap Links / On Load Tap Changer (OLTC) with RTCC & AVR Temperature Sensors for alarm and trip protections
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