Oil Immersed Distribution Transformers

General Description

Kalpa offers a complete line of oil cooled three-phase distribution transformers that meet applicable IS / IEC standards. With high voltages up to 33kV and ratings up to 10 MVA, transformers are designed for outdoors covering domestic, International , commercial and industrial applications. High-grade materials, combined with sophisticated engineering design systems and state of the art test infrastructure are key elements of a transformer that will deliver years of highly reliable service.

Design can meet any stringent specifications
Offering low losses as per request. As per IS1180/EEL - 1, 2 & 3 BEE STAR RATING
Capacity to Execute large volume orders.

TECHNICAL SPECIFICATIONS

Construction Type	Indoor/Outdoor
Duty Type	Outdoor / Indoor, Pole or Ground Mounted
Voltage Class	3.3, 6.6, 11, 22, 33kV or any specific
No of Phases	1 or 3 Phase, ONAN, KNAN
Frequency	50/60 Hz
Capacity	Up to 10MVA
Insulating Fluid	PCB FREE Mineral Oil, both inhibited & Biodegradable FR3,uninhibited as per IS335/IEC60296 and customer requirement
Class of Insulation	Class A
Tap Changer	Off Circuit or On Load
Tapping Range	OCTC or OLTC as per customer requirement
Winding Material	Aluminum or Copper with multi paper covering
Applicable Standards	IS 1180 ,IS 2026, IEC 60076, ANSI, IEEE
Painting	Enamel, Epoxy, Polyurethane or customer specific

Assured Features

Highest dielectric insulation property to withstand Lightening Impulse
Mechanical design to withstand short circuit forces arising during faults
Optimum oven heating under vacuum as to achieve desired compression height and maximum insulation resistance (IR) to windings
Adequate ducts between layers, coils, discs for maximum oil flow and reduced hot spot temperature.
Step-lap designed CRGO laminations for lower losses and excitation current
Pre-compressed Insulation material for minimal moisture absorption

Standard Fittings

H.V. Cable box
L.V. Cable box with bus bar or bus duct
Off circuit tap links
Conservator oil filling hole With cap & drain plug
Undercarriage with four Bi-directional rollers
Earthing terminals
Drain cum bottom filter Valve with sampling plug
Top filter valve with Sampling plug
Plain Oil Level Gauge

Rating diagram plate
Air release device
Thermometer Pocket
Lifting lugs
Pressed Steel Radiators (Fins or corrugated type)
Double Diaphragm explosion vent
Silica gel breather
Additional Neutral bushing
First filling of oil

Optional Fittings

Detachable Radiators with isolating valves
Jacking Pads
Dial type Oil Temperature Indicator With A/T contacts
Dial type Winding Temperature Indicator with A/T contacts
Magnetic Oil Gauge with A/T contactsw
Buchholz relay with A/T contacts

Marshaling box with control wiring
Equalizer pipe between Conservator & explosion vent
On Load Tap Changer
RTCC Panel with automatic Voltage Regulator (AVR)
Pressure Release valve
DGPT Relay