The HWGIS-40.5/T1250-31.5 high-voltage switch is designed for control and protection in 40.5kV power transmission and distribution systems, specifically for load current switching and short-circuit interruption. Featuring a modular design, it delivers compact structure, superior breaking performance, high reliability, extended service life, complete insulation, maintenance-free operation, and space-efficient installation. Widely applicable across industrial networks, residential grid systems, and end-user power supply networks, this equipment proves particularly suitable for small secondary substations, switchgear stations, industrial complexes, airports, railways, highways, subways, commercial districts, residential communities, wind farms, and photovoltaic applications.
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Model composition
HWGIS-40.5/T1250-31.5
Operating conditions
installation site | In the box |
ambient temperature （℃） | -45~+140 |
height （m） | ≤2000 |
air humidity （%） | The daily average is not greater than 95% and the monthly average is not greater than 90% |
seismic intensity | No more than 8 degrees |
Technical parameters of circuit breaker
order number | Main equipment and technical performance | Parameters and requirements | |
1 | circuit breaker | 1 unit | |
• type | Fixed vacuum circuit breaker | ||
• rated voltage | 40.5kV | ||
• rated current | 1250A | ||
• rated frequency | 50Hz | ||
• Peak lightning impulse withstand voltage (breakout/ground) | ≥215kV/185kV | ||
• 1min power frequency withstand voltage (breakout/ground) | ≥118kV/95kV | ||
• Rated short-time power frequency withstand voltage of auxiliary circuit | 2kV、50HZ 1min | ||
• Rated short-term withstand current | 20kA | ||
• Rated peak withstand current | 50kA | ||
• Rated short circuit breaking current | 20kA | ||
• Rated short-circuit closing current | 50kA | ||
• Rated short circuit duration | ≥4s | ||
• Operating mechanism | type | Spring operating mechanism | |
control voltage | DC 24V/48V/110V/220V | ||
Auxiliary contacts | 6 always on, 6 always off | ||
• mechanical life | Rated operating sequence | O-0.3s-CO-180s-CO | |
mechanical life | 10,000 times | ||
• Electrical life | 10,000 times | ||
• mechanical properties | Closing and opening time | 35-70ms | |
Comb and split speed | 1.2-1.9mm/s | ||
clearance between open contacts | 18-22mm | ||
Three-phase coincidence and different phase separation | ≤3ms | ||
2 | Three position isolating switch | 1 unit | |
• type | Manual/ Electric | ||
3 | • Auxiliary contacts | 3 always on, 3 always off | |
• mechanical life | 2,000 times | ||
• Electrical life of grounding switch | 2,000 times | ||
4 | Cabinet dimensions | Not larger than 600X1700 (width X depth) | |
Mechanical characteristics of circuit breaker
order number | inspecting item | technical requirement |
1 | Check the main switch of the circuit breaker | Number of arc extinguishing chamber (indicate manufacturer) |
The opening distance is 18-22mm | ||
Exceeding the limit by 3±1mm | ||
Contact pressure ≥ 3000N | ||
2 | Mechanical properties inspection | The difference between three-phase phase separation is less than 2ms |
The difference between three-phase closing time is less than 2ms | ||
Average speed of commutation 1.4-2.0m/s | ||
Average closing speed 1.0-1.8m/s | ||
3 | Circuit breaker circuit | Loop resistance ≤ 45μΩ |
Service Hotline
No. 333, Weishiqi Road, Yueqing Economic Development Zone, Zhejiang Province
Samples
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