24kV GIS Sf6 Break Switch Circuit Breaker for Gas Insulated Switchgear
Key attributes
| Brand | Switchgear parts |
| Model NO. | 24kV GIS Sf6 Break Switch Circuit Breaker for Gas Insulated Switchgear |
| Rated voltage | 24kV |
| Rated normal current | 630A |
| Rated frequency | 50Hz |
| Series | RNV-B1 |
Product descriptions from the supplier
The RNV-B1-24 SF6 circuit breaker switch is mainly used in 24KV/630 SF6 gas filling cabinets. As the main component of the gas filling cabinet, it undertakes the main function and has the rated current and load current for opening and closing; Performance such as closing and breaking short-circuit currents.
This series of products will be shipped after passing the full inspection and comply with the relevant requirements of GB1984-89 and GB/T1984-2014 AC high-voltage circuit breakers.
Product Parameters
Serial Number |
Item |
Unit |
Parameter |
1 |
Rated Frequency |
kV |
24 |
2 |
Rated Current |
A |
630 |
3 |
Rated Breaking Current / Thermal Stability Time |
kA/s |
20/4 |
4 |
Rated Peak Withstand Current |
kA |
50/63 |
5 |
Rated Short-circuit Making Current |
kA |
50/63 |
6 |
Short-circuit Making Times |
times |
30 |
7 |
Power Frequency Withstand Voltage: Phase-to-Ground |
kV |
65 |
8 |
Power Frequency Withstand Voltage: Break |
kV |
79 |
9 |
Lightning Impulse: Phase-to-Ground |
kV |
125 |
10 |
Lightning Impulse: Break |
kV |
145 |
11 |
Main Circuit Resistance |
μΩ |
≤60 |
12 |
Mechanical Life of Arc Extinguishing Chamber |
times |
10000 |
13 |
Mechanical Life of Isolation / Earthing Switch |
times |
5000 |
Installation dimensions
The core advantages focus on four dimensions: insulation and arc-extinguishing performance, structural integration, environmental tolerance, and intelligent adaptability: ① Reliable insulation and arc-extinguishing: SF6 gas has strong arc-extinguishing ability, fast insulation recovery speed after breaking, and can achieve zero arcing breaking. The rated short-circuit breaking current is ≥25kA, meeting the fault protection requirements of medium-voltage distribution networks; ② Compact and integrated structure: The volume is only 1/3~1/2 of that of traditional open-type circuit breakers, directly adapting to the GIS cabinet layout and reducing the overall floor area of GIS equipment; ③ Excellent environmental tolerance: The fully sealed structure isolates external dust, humidity and salt spray erosion, with a protection level of IP67, suitable for harsh scenarios such as coastal areas, high altitudes and high pollution; ④ Convenient intelligent operation: Support electric remote control and manual emergency operation, equipped with position status feedback, SF6 gas pressure monitoring and fault alarm functions, suitable for unattended substations; ⑤ Low operation and maintenance cost: The sealed SF6 gas chamber design has a gas leakage rate of ≤0.1%/year, no need for frequent gas replenishment, and the mechanical life of the whole machine is ≥10000 times, greatly reducing the later maintenance cost.
It is a core protection switch component specially designed for 24kV medium-voltage gas insulated switchgear (GIS), using SF6 gas as insulation and arc-extinguishing medium, integrating three core functions: load current breaking, short-circuit fault interruption, and circuit isolation. Different from traditional open-type circuit breakers, it has a compact structure and excellent sealing performance, and is directly embedded in the GIS cabinet. It adapts to the design requirements of GIS equipment for "miniaturization, maintenance-free and high reliability", and can quickly cut off overload and short-circuit faults in 24kV distribution network systems, making it a key protection equipment for urban power grids, industrial park power distribution and unattended stations.
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