TGXR6-12 series SF6 fully insulated and fully sealed metal-enclosed ring network switchgear (SF6 fully insulated ring main unit) is a gas-insulated medium-voltage switchgear with threephase AC 50Hz and rated voltage of 12kV. All live parts and switches are enclosed in a stainless-steel housing without any influence from the external environmental conditions for high reliability, safety and maintenance free.
TENGEN SF6 fully insulated ring main unit complies with IEC 62271, IEC 60420, GB/T 3906, and GB/T 11022 standards.
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TGXR6-12KV SF6 Ring Main Unit Technical Parameters
| Name | Unit | Load switch unit | Combined apparatus unit | Circuit breaker unit | |
| Rated voltage | kV | 12 | |||
| Rated freq. | Hz | 50 | |||
| Rated current | A | 630 | ≤125 | 630/1250 | |
| Rated insulation level | Power frequency withstand voltage(phase-to-phase or phase to ground) | kV | 42 | ||
| Power frequency withstand voltage(between open contacts) | 48 | ||||
| Power frequency withstand voltage(control and auxiliary circuits) | 2 | ||||
| Lightning impulse withstand voltage(phase-to-phase or phase to ground) | 95 | ||||
| Lightning impulse withstand voltage(between open contacts) | 110 | ||||
| Rated short-time withstand current | Main circuit (4s/2s) | kA | 20/25 | — | 20/25 |
| Grounding circuit(2s) | 17.4/21.7 | — | 17.4/21.7 | ||
| Rated peak withstand current | Main circuit | kA | 50/63 | — | 50/63 |
| Grounding circuit | 43.5/54.3 | — | 43.5/54.3 | ||
| Rated short-circuit breaking current | kA | — | 31.5 | 20/25 | |
| Rated short-circuit making current | kA | 50/63 | 80 | 50/63 | |
| Rated transfer current | A | — | 1600 | — | |
| Mechanical life | Load switch / circuit breaker | Times | 5000 | 5000 | 10000 |
| Isolating switch / grounding switch | Times | 3000 | 3000 | 3000 | |
| Rated pressure of SF6 gas(relative value at 20℃) | Rated charge pressure | MPa | 0.035 | ||
| Min. functional charge pressure | 0.02 | ||||
| Protection grade | Cabinet body | IP4X | |||
| Gas box | IP67 | ||||
| Annual relative leakage rate of gas | %/Y | ≤0.05 | |||
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Zhejiang Tengen Electric Co., Ltd.
Sulv Industrial Zone, Liushi Town, Yueqing City, Zhejiang Province, China, 325699
+86 21 3119 8727
marketing@tengen.com.cn
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