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| Brand Name: | Qingchang |
Typical primary plan
An optional solution with a rated short-time breaking current of 1250A and a rated current of 25kA:
An optional solution with a rated short-time breaking current of 1250A and a rated current of 31.5kA:
An optional solution with a rated short-time breaking current of 2500A and a rated current of 31.5kA:
An optional solution with a rated short-time breaking current of 3150A and a rated current of 40kA:
Rated Parameters
| S/N | Item | Unit | Parameter | ||||
| 1 | Rated voltage | kV | 24 | ||||
| 2 | Rated current | A | 630,1250,2500,3150,4000 | ||||
| 3 | Rated frequency | Hz | 50/60 | ||||
| 4 | Rated power frequency withstand voltage(1min) |
Phase-to-phase and Phase-to-earth |
kV | 42 | 65 | 95 | |
| Across isolating distance | kV | 48 | 79 | 118 | |||
| 5 | Rated lightning impulse voltage (1.2/50ms) |
Phase-to-phase and Phase-to-earth |
kV | 75 | 125 | 185 | |
| Across isolating distance | kV | 85 | 145 | 215 | |||
| 6 | Main circuit temperature rise | A | 1.1*Ir | ||||
| 7 | Rated short-time breaking current | kA | 25,31.5,40 | ||||
| 8 | Rated short-circuit closing current | kA | 63,80,100 | ||||
| 9 | Rated short circuit duration | s | 4 | ||||
| 10 | Rated short-time withstand current | kA | 25,31.5,40 | ||||
| 11 | Rated peak withstand current | kA | 63,80,100 | ||||
| 12 | Electrical life rating | / | E2 | ||||
| 13 | SF6/C4 Rated pressure(20℃) | MPa | 0.03 | 0.03 | 0.03 | ||
| 14 | Annual gas leakage rate | % | ≤0.01 | ||||
| 15 | Gas tank protection degree | / | IP67 | ||||
| 16 | Shell protection degree | / | IP4X | ||||
| 17 | Mechanical life of circuit breakers | times | 10000 | ||||
| 18 | Mechanical life of the disconnecting switch | times | 3000 | ||||
| 19 | Grounding switch mechanical life | times | 3000 | ||||
Product Overview
The QCX F-24 series SF6 gas-insulated metal-enclosed switchgear (C-GIS) is a switch main unit used in distribution networks and is now widely used in State Grid, Southern Grid, high-speed railways, subways, large cities, mines, new energy, and other locations.
All live parts and switches are enclosed within the same stainless steel welded SF6 insulated sealed gas chamber. The entire switchgear is unaffected by external environmental conditions, ensuring operational reliability and personal safety.
The switch units are designed modularly and can be freely combined according to customer requirements.
Product Features
Multi-scheme
There are multiple switch schemes in the design, including integrated and split types, which can be selected according to project requirements.
Maintenance Free
The high-voltage conductor is completely sealed, with incoming and outgoing lines through insulating bushings, maintenance-free for the life cycle.
Miniaturization
Compact structure, reducing the footprint by about half compared to traditional switchgear.
Wide Application
It can be used in high-altitude and humid coastal areas.
