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Help CenterSupplier 11KV Neutral Grounding Resistors For Protect Electrical System
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Supplier 11KV Neutral Grounding Resistors For Protect Electrical System:
1.Neutral grounding resistance
2.voltage:6kv~20kv
3.Power rated frequency:58~62Hz and 48~52 Hz
4.rated humidity:less than 95%
Technology standard:
|
DI/780 -2001 |
distribution system neutral grounding resistor |
|
GB6450 |
dry-type power transformer |
|
DI/T620-1997 |
Overvoltage protection and insulation coordination of AC electrical equipment |
|
GB/T16927-1997 |
high voltage testing technology |
|
GB1208-1997 |
current transformer |
|
GB4208-93 |
case protection grade |
|
IEEE32-1972 |
Technologies ,terms, and experiments of neutral grounding equipments |
|
GB311.1-1997 |
insulation coordination of high voltage transmission and distribution device |
|
DL/T593-1996 |
common ordering technical conditions of high voltage switch device
|
|
GB50150-1991 |
standards of electrical equipment handing-over and experiment of electrical device installment project
|
Parameters of Grounding Transformer
|
Generator Capacity (MW) |
100/125 |
200 |
300 |
600 |
900/1000 |
||||
|
Generator Rating Voltage(kV) |
10.5 |
13.8 |
15.75 |
18 |
20 |
20 |
24 |
24 |
27 |
|
Estimated Max. Capacitance Current of loop single phaseto ground(A) |
4 |
5 |
6 |
8 |
10 |
||||
|
Primary Side Voltage of ground Transformer(kV) |
10.5/ |
13.8/ |
15.75/ |
18/ |
20/ |
20/ |
24/ |
24/ |
27/ |
|
Secondary Side Voltage of ground Transformer(kV) |
0.22 |
0.22 |
0.22 |
0.22 |
0.22 |
||||
|
Rated Capacity of Ground Transformer (kVA) |
30 |
30 |
50 |
50 |
63 |
||||
|
Secondary Side Resistor Value(Ω) |
1.0 |
0.8 |
0.5 |
0.4 |
0.3 |
||||
|
Draw-out Voltage of Ground Protection (kV) |
0.1 |
0.1 |
0.1 |
0.1 |
0.1 |
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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