Ningbo Tianan (Group) Co.,Ltd.
Ningbo Tianan (Group) Co.,Ltd
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33Kv / 36Kv / 40.5Kv Indoor RMU Switchgear , Sf6 High Voltage Switchgear
NINGBO TIANAN (GROUP) CO., LTD.
Overview:
The GIS is suitable for power plant, substation, combined substation and electric power system, which is three phase indoor AC single busbar and sectioning single busbar with 50Hz, 35kV rated voltage, used to control, accept and distribute electric power.
Functional design:
1. Reliable
Each compartment is monitored individually & has its own pressure relief device.
2. Safety
The primary side components are hermetically enclosed, gas filled compartment and thus insensitive
to atmosphere, dirt &dust.
3. Space saving
Smaller foot prints All operations on the switchgear front.
4. Economically efficient
Reduced space & surface area requirement. Long service life Maintenance free Gas compartment.
Specifications
Parameter:
| No. | Item | unit | Parameter | |
| 1 | Rated voltage | KV | 33/36/40.5 | |
| 2 | Main busbar rated current | A | 400/630 | |
| 3 | Rated current | A | 630A | |
| 4 | Rated frequency | HZ | 50 | |
| 5 | Rated short-time withstand current | KA | 20,25 | |
| 6 | Rated short time continual time | S | 2 | |
| 7 | Rated peak withstand current | KA | 50,63 | |
| 8 | Rated short-circuit making current | KA | 50,63 | |
| 9 | Rated active load breaking current | A | 630 | |
| 10 | Rated closed loop breaking current | A | 630 | |
| 11 | Rated cable-charging breaking current | A | 10 | |
| 12 | The earthing switch rated short-time resistance current |
KA | 20 | |
| 13 | Grounding switch rated short circuit duration |
S | 4 | |
| 14 | Grounding switch rated peak withstand current |
KA | 50 | |
| 15 | Rating insulation level | 1min Power frequency withstand voltage |
KV | (phase to phase/ phase-to-ground) 42; (isolating distance) 48 |
| lightning impulse withstand voltage (peak value) |
KV | (phase to phase/ phase-to-ground) 75; (phase to phase/ phase-to-ground) 85 |
||
| 16 | major loop resistance | ≤400 | ||
| 17 | mechanical life | Load switch | time | 5000 |
| Earthing switch | time | 2000 | ||
| 18 | subsidiary loop 1min Power frequency withstand voltage |
KV | 2 | |
| 19 | SF6 Rated Gas pressure (20ºC gauge pressure) |
Mpa | 0.04 | |
| 20 | SF6 Gas annual Leakage rate | <=0.2% | ||
| 21 | Protection grade of gas insulated enclosure | IP67 | ||