For a completed solar project or a solar farm, following testing items need to be carried out, which contain three main parts , Electrical testing for pre-fabricated box-type transformers or an oil-immersed distribution transformer, high and low voltage switchgear, and LV & Medium cables.
01 . Testing items for a pad mounted distribution transformer
1. Winding insulation resistance and absorption ratio
2. Winding DC resistance
3. Grounding resistance test
4. Test of transformer connection group
5. Voltage to transformer ratio test
6. AC withstand voltage test
7. Insulation oil experiment
02 Testing items for high and low voltage switchboard
1. Insulation resistance test of circuit breaker
2. Circuit resistance experiment of circuit breaker
3. Opening and closing time characteristics of circuit breakers
4. Circuit breaker opening and closing coil resistance test
5. AC withstand voltage test of circuit breaker
6. Electrical experiment of transformer inside the cabinet
03 Testing items for power cables
1. The main insulation resistance of the cable
2. AC withstand voltage test of cable main insulation
3. Phase sequence verification
4. Line section
5. Line parameter measurement
PowerTel is a product & solution provider for building up a new solar project, including technical consulting, initial & optimal value engineering, installation & construction, testing & commissioning to final integration to local grid network.
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