Installation & commissioning of 2 x 11,5/23MVA, 33/11kV transformers
Scope of work
Design, manufacture and testing of 1 x 15/30MVA, 33/11.5kV power transformer.
The transformer was delivered with radiators attached and conservator removed, using a low loader then off-loading via mobile crane and lifted into position. The transformer was then built up using the same crane.
Full in-house routine & partial discharge testing.
Full commissioning works as per the customer’s specification which includes;
Insulation resistance of each winding
Core & secondary circuits
Transformer ratio check
Vector group check by 3 phase low voltage energisation of transformer
Checks on all CTs & VTs for insulation resistance
Ratio & magnetisation curves
Operation of tapchanger through range & operation of limit switches