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Transformer Erection & Commissioning

  /   Transformer Erection & Commissioning

POWER TRANSFORMER ERECTION AND COMMISSIONING SERVICE

CORE Power can be erecting and commissioning of any type / any application transformer such as ICT / GT / UAT / ST transformer of various brands such as BHEL, HHE, NGEF, CGL, TELK, GEC, ABB etc.

Range of Power Transformer: Up to 500MVA
Voltage Rating: 66KV-132KV-220KV-440KV
Service Location: PAN India
Mobilization of Team: within 3days of commencement

Basic Installation Process

Prior to hauling, review all possible routes and check obstructions to avoid delays in the activities. Hydraulic pallet jack and other necessary tools in mounting the equipment shall be check and ready upon receiving of equipment.

  • Form works, grouting and finishing touch for concrete foundation shall be executed with respect to project standard specification.
  • Obtain work transfer sheet from civil contractor for transformer foundation prior to bringing the transformer for installation.
  • Transformer should be mounted on flat level pad strong enough to support the weight of the transformer. It should be installed in a safely manner and following the procedure provided by the transformer vendor (if any), and Approved for Construction drawings.
  • Conduct preliminary inspection to the completed installed transformer to ensure that all components have been installed completely and properly for final inspection.
  • Ensure that nameplate and warning signs are properly installed accordingly to the transformer as per latest Approved for Construction drawing.
  • Transformer installed shall be properly grounded to the system grounding as per latest Approved for Construction drawing and Saudi Aramco Standard.
  • Transformer and its components shall be tested as per Customer’s recommendation and IS Test Procedure. Testing result shall be recorded/filed and submitted to Customers.

DISTRIBUTION TRANSFORMER ERECTION AND COMMISSIONING SERVICE

A distribution transformer is an important link between any utility’s distribution network and the power supply delivered to customer. It is therefore most vital asset in any electrical distribution network and needs special attention right from erection, commissioning and maintenance of these transformers.

 

Range of Distribution Transformer: 10 KVA to 10000 KVA
Voltage Rating: 33KV-11KV-6.6KV/0.433KV
Service Location: PAN India
Mobilization of Team: within 3days of commencement

Check points before Installation of Distribution Transformer
  • Check the transformer bushings thoroughly for any signs of cracks / damages
  • Check the oil level in the transformer and check for any signs of oil leakage through bushings, gaskets or welded joints
  • Test the Insulation Resistance (IR) values using a 1000 V Megger unit for various sections such as – HV to LV, LV to Earth, HV to Earth.
  • In case IR test values are not desirable then it is necessary to dry out the transformer completely by filtration procedure
  • Check whether tests are carried out for – Ratio Tests, % impendence voltage test and rate voltage withstand tests

For Transformer on a Pole mounting structure

  • Ensure that the base channel of transformer is at height complying to IEC Standards
  • Ensure that base channel is horizontally levelled
  • Avoid jerky movement of the transformer while lifting it upwards during installation
  • During installation ensure that the HV bushings of the transformer are on the DO unit (or HG fuse unit) side of the structure
  • After installation of transformer, also check that other allied equipment such as AB switch, Horn Gap fuse units, DO Fuse sets, Lightening arrestor etc. are fitted at appropriate positions as per the applicable drawing issued by the utility.