Sf6 Gas Circuit Breaker

Item:Sf6 Gas Circuit Breaker
Excellent Arc Extinguishing Performance: SF6 gas is highly effective at extinguishing electrical arcs.
Simple Structure and Compact Size: The design is straightforward and space-efficient.
Good Opening Performance: Provides reliable and balanced operation during switching.
Sealed Circuit Breaker: Operates with minimal noise due to its sealed design.
Low Inspection and Maintenance Workload: Requires less frequent and simpler maintenance.

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Product Description

Item:Sf6 Gas Circuit Breaker

The SF6 Gas Circuit Breaker is a three-phase high-voltage electrical device designed for outdoor use with the following specifications:

● AC frequency: 50 Hz

● Rated voltage: 72.5 kV and below

● Rated current: Up to 3150 A

It is primarily used for the protection of power transmission and transformation lines. The circuit breaker consists of three poles mounted on a frame and cannot be operated with just one pole.

Advantages of SF6 Gas Circuit Breaker:

1. Strong Breaking Capacity: Effectively interrupts high currents.

2. Long Electrical Life: Designed for extended operational use.

3. High Insulation Level: Provides excellent insulation to prevent electrical failures.

4. Good Sealing Performance: Ensures reliability and minimal maintenance.

Main Technical Parameters

Number	Sf6 Gas Circuit Breaker Parameter	Unit	Value
1	Rated voltage	kV	72.5
2	Rated current	A	2500/3150
3	Rated short-circuit breaking current	kA	31.5/40
4	Rated short-circuit making current (peak value)	kA	80
5	Rated short-time withstand current	kA	31.5/40
6	Rated short circuit duration	S	4
7	Rated peak withstand current (peak)	kA	80
8	Near zone fault breaking current	kA	31.5×75%
9	Rated out-of-step breaking current	kA	31.5×25%
10	first open pole coefficient		1.5
11	Opening time	S	≤0.03
12	Breaking time	S	≤0.06
13	Closing time	S	≤0.15
14	split time	S	≥0.3
15	united time	S	0.06
16	Weight of sulphur hexafluoride gas charged into circuit breaker	kg	3.5
17	Circuit breaker gross weight	kg	1000
18	Mechanical life	Second-rate	3000

Structure And Mounting Dimensions

Working Environment：

● Temperature Range: Designed to operate effectively in a wide temperature range, typically from -25°C to +40°C, though specific models may have different limits.

● Humidity: The breaker can function in environments with high humidity, but proper sealing ensures that moisture does not enter the gas chamber.

● Altitude: Suitable for high-altitude locations, with performance specifications adjusted for reduced atmospheric pressure.

● Pollution Level: Can be used in environments with various pollution levels; however, it's essential to ensure adequate insulation and maintenance for heavily polluted areas.

Possible causes of electrical circuit failure

● Insulation Breakdown: Deterioration or damage to insulation materials can lead to short circuits or ground faults.

● Contamination of SF6 Gas: Impurities or moisture in the SF6 gas can compromise its insulating properties, leading to failures.

● Mechanical Failure: Wear and tear on mechanical components, such as moving contacts or operating mechanisms, can cause operational issues.

● Improper Maintenance: Lack of regular inspection and maintenance can result in unnoticed wear or faults.

Product Real Shot

FAQ

A1:What is SF6 gas?
Q1:SF6 (sulfur hexafluoride) is an electronegative gas used as an insulating and arc-extinguishing medium in high-voltage equipment.

A2:Why is SF6 gas used in circuit breakers?
Q2:SF6 gas has excellent insulating properties and a high breaking capacity, making it effective for preventing electrical arcing and maintaining safety in high-voltage applications.

A3:What are the main advantages of SF6 Gas Circuit Breakers?
Q3:Key advantages include strong breaking capacity, long electrical life, high insulation levels, and good sealing performance, leading to reduced maintenance needs.

A4:What is the typical operating environment for SF6 Gas Circuit Breakers?

Q4:They are designed to operate in various conditions, including wide temperature ranges, high humidity, and high altitudes, but require good ventilation and proper sealing.

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