MRD-FD generator neutral grounding resistors:
Parameters of Grounding Transformer
Parameters of Grounding Transformer
Insulation Grade: H
Cooling-down Method: AN
Temperature Rise ≤ 100K
Proctective Grade of paper insulation dry-type connected transformer is IP00 (without casing), IP20 and ip23 (with casing)
Insulation level, impedance voltage, no-load loss and on-load loss are as per National Standards.
Test of inpedance: high voltage to low voltage or grouding ≥300 MΩ, low voltage to grounding ≥100 100 MΩ
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Generator Capacity
(MW)
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100/125
|
200
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300
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600
|
900/1000
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Generator Rating Voltage(kV)
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10.5
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13.8
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15.75
|
18
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20
|
20
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24
|
24
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27
|
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Estimated Max. Capacitance Current of loop single phaseto ground(A)
|
4
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5
|
6
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8
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10
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Primary Side Voltage of ground Transformer(kV)
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10.5/
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13.8/
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15.75/
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18/
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20/
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20/
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24/
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24/
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27/
|
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Secondary Side Voltage of ground Transformer(kV)
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0.22
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0.22
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0.22
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0.22
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0.22
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Rated Capacity of Ground Transformer (kVA)
|
30
|
30
|
50
|
50
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63
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Secondary Side Resistor Value(Ω)
|
1.0
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0.8
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0.5
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0.4
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0.3
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Draw-out Voltage of Ground Protection
(kV)
|
0.1
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0.1
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0.1
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0.1
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0.1
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