1.0 Purpose:
The objectives of the Commissioning works are:
(i) To verify proper functioning of the equipment/system after installation
(ii) To verify that the performance of the installed equipment/systems meet
with the specified design intent through a series of tests.
(iii) To capture and record performance data of the HT installation as the
baseline for future operation and maintenance.
2.0 Scope:
The objective of this document is to provide a structure for the commissioning of the HT electrical services included within the sub�contract including the following:
(i) Ht Switchgear & Panel
(ii) Current Transformer
(iii) Potential Transformer
(iv) Relay
(v) Power Transformer
3.0 References
Below Indian standard were referred to prepare this document
- Power Transformer (IS 2026 & IS 10028)
- Current transformer (IS 2705)
- Potential Transformer (IS 3156)
- Protection Relay (IS 3231)
- HT Cable (IS 1255 & IS 10810)
- HT Switchgear (IS 3427)
5.0 Procedure for Commissioning:
The purpose of electric systems commissioning is to increase the reliability of electrical power systems after installation by identifying problems and providing a set of baseline values for comparison with subsequent routine tests.
5.1 Safety Considerations:
Statutory and Company legislation relating to safety must be followed. During testing hazardous voltages will be present, only qualified personnel are allowed operate the equipment with hazardous voltages present.
5.2 Pre-Test Inspection:
Before commencing the pre-commission tests, it is necessary to visually inspect various parts, components and accessories of the HT electrical system and also to conduct operational checks for various equipments
associated with the electrical system. Check lists may be followed for the visual inspection and the operational checks so that the pre-commission checks are conducted in a systematic manner. Appendix C contains the
pre-commissioning installation checklist.
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