• date_rangePosted On :   Nov 29' 2011
  • location_cityCity :   Isolo
  • languageCountry :   Nigeria
  • content_pasteEnquiry No. :   B-119116

The features and technical data of the required transformers are stated below:

Distribution Transformers:
Features:
Better cooling
Low noise level
Better impulse
Withstand short circuit
Long functional life

Technical specifications:
Product Range: 63 kVA TO 3000 kVA
Rated Voltage: 11KV/0.433 KV

The standard fittings required are as follows:
Rating and diagram plate
Earthing terminal -2 nos
Lifting Lugs
Oil level Indicator
Drain - cum - bottom filter valve with plug
Oil filling hole with plug on conservator
Oil conservator with oil drain plug
Air release plug
Silica-gel air breather
Bi-directional flat roller
HV terminals - outdoor bushinges
LV terminals - outdoor bushinges
Radiators
Filter valve with plug
Thermometer pocket
External temperature indicator
Externally operated off circuit tap changing switch
Explosion vent
Sampling valve (for 2000 kVA trf. ) Testing
Measurement of winding resistance
Measurement of voltage ratio and check of voltage vector relationship
Measurement of insulation resistance
Dielectric Test
Measurement of no-load losses and no-load current
Measurement of impedance voltage / short-circuit
Impedance (principle tapping) and load loss
Short circuit test
Temperature rise test
Measurement of acoustic noise level
Double voltage & double frequency test
Air pressure test on tanks for checking of leakage

Automatic Voltage Controllers:
Features:
Reduction in breakdown of the electrical equipment
Energy saving 5 % to 10 % possible
Improvement in power factor
Reduction in MDI
100% depreciation as per income tax Act
Overloading protection
Over and under voltage protection

Secondary equipment would comprises of indicating & measuring equipment

Volt meter analogs / digital type, indicating input and output volts.
Ammeter analogs/digital type, indicating input & output current.
Mode switch for manual or automatic

Specification
Mode selection
Out put volt select-ability level switch
Sensibility level select-ability switch
MCB Box provided for control panel
Models:
Single Phase - 3kVA to 30 kVA
Three Phase - 20 kVA to 5000 kVA
Types - Balance Type & unbalance type.

Manufacturers of this transformers should contact us through the required details.

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