Wuhan Rising Electric Co., Ltd.
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Automatic Comprehensive 22kV Capacity 2000kVA Transformer Routine Testing Equipment for Laboratory or Workshop
1.The experimental subject for the equipment that Party A purchased from Party B meet the following requirements:
■ 35kV ordinary power transformers and special transformers, capacity 20000kVA and below;
2 The experimental subject for the equipment that Party A purchased from Party B must meet the following requirements of voltage classes:
The impedance of the tested transformer is less than 8%, the voltage class is:
■ HV side 35kV, etc.
■ 0.4kV～10kV.LV side:0.4kV～10kV.
3. The experimental subject for the equipment that Party A purchased from Party B meet the following requirements of tested capacity:
HV side voltage level 22kV capacity 2000kVA and below.
4. The experimental subject for the equipment that Party A purchased from Party B must meet the following test requirements:
4.1 Routine testing
■ Transformer no-load current percentage and no-load loss testing;
■ Transformer short-circuit impedance percentage and load loss testing;
■ Transformer power frequency withstand voltage testing;
■ Transformer frequency doubling induced withstand voltage testing;
5 Based on the analysis of experimental ability, the experimental subject for the equipment that Party A purchased from Party B meet the following test ability:
5.1 No-load and load loss test ability
■ For the voltage level of 0.4kV/33kV distribution transformer, it’s ok to use the direct low-voltage circuit testing for no-load and load loss.
■ In conclusion, High voltage current transformer of the variable ratio gear selection (Rated working voltage:3KV): 200/1,100/1,50/1,30/1,20/1,10/1,5/1,1A/1A, total:8 speed, precision grade:0.05%; voltage transformer of the variable ratio gear selection: 3kV/100V,2kV/100V,1KV/100V,0.5KV/100V,total:4 speed, precision grade:0.05%.
4) Special transformer (need to inform detailed capacity and voltage level when ordering).
Test item:
1) Transformer winding resistance test
2) Transformer voltage ratio measurement and connection group number test
3) Transformer no-load current (%) and no-load loss test
4) Transformer short circuit impedance (%) and load loss test
5) Transformer power frequency applied pressure test
6) Transformer induced withstand voltage test
Extensible test project:
1) Transformer partial discharge test
2) No-load harmonic test (0-31th harmonic)
3) Withstand voltage test of transformer oil (0-80Kv)
4) Transformer temperature rise test (can automatically draw temperature rise curve)
5) Insulation resistance test (absorption ratio and polarization index)
6) Transformer anti-interference dielectric loss test
7) Lightning impact test.
Performance indicators:
1. Tested transformer parameters
1.1 Transformer capacity under test (to meet temperature rise test condition, dry type transformer)
10kV level ≤2500KVA
35kV level ≤6300kVA
1.2 Tested transformer voltage level below 35kV on primary side
2. Accuracy
2.1 Voltage Range 0-22kV
2.2 Current Range 0-400A
2.3 Minimum voltage resolution 0.001V* PT ratio
2.4 Minimum current resolution 0.0001A*CT ratio
2.5 Power Minimum Resolution 0.1W*PT Ratio*CT Ratio
2.6 Ambient temperature -10~45°C
2.7 Using Relative Humidity 85%