OCTC Distribution Transformer (Oil Cooled Off Circuit Tap Changer Distribution Transformer)
RANGE :Upto5 MVA in 11, 22, & 33KV Class.
NGG manufactures a wide range of distribution and medium power transformers. A distribution transformer or service transformer is a transformer that provides the final voltage transformation in the electric power distribution system, stepping down the voltage used in the distribution lines to the level used by the customer.The transformers are generally designed and manufactured to comply with the IEC publications 60076.
FEATURES
- Designed for 25 years of trouble-free performance
- Design conforms to IS 1180, 2026, BS 171, IEC 76 and other relevant standards
- Low power loss and low noise
- Designed to withstand electrical impulses, thermal and dynamic stresses
- Optimum utilization of active materials for compactness
- HIGH PERFORMANCE WITH LIFE EXTENSION AND LOADING FLEXIBILITY
- Modern manufacturing techniques ensure cost effectiveness and reliability
STANDARD SPECIFICATIONS
| Capacity | – | Up to 4000 KVA |
| No. of Phases | – | 3 Phase |
| Frequency | – | 50 Hz. |
| Voltage Range | – | 11 kV/22kV/33kV |
| Tapping | – | + 5% To -15% Taps on H.T. Side in steps of 1.25% each or as customer required. |
| Insulation | – | Class ‘F’/ ‘H’ |
| Vector Group | – | Dyn 11 |
| Duty Cycle | – | Continuous |
| Winding | – | Copper Wound |
| Terminals | – | As per required |
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 (PSR, Elliptical Tubes and Corrugated Type) | – | 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 | – | RTCC (Remote Tap Changer Control) Cubicle |
| Winding Temp. indicator with alarm & trip contact | – | Electronic Automatic Voltage Controller |
| DGPT Relay | – | Optimum utilization of active materials for compactness· |
| Neutral current transformer |