| Customization: | Available |
|---|---|
| Breaking Capacity: | High Voltage Circuit Breakers |
| Operation: | Electric Type |
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Technical Specifications of the LW8-40.5 Type High Voltage SF6 Circuit Breaker (Tank Type)
The LW8-40.5 type outdoor high voltage SF6 circuit breaker (hereinafter referred to as "circuit breaker") is a three-phase AC 50Hz outdoor high voltage electrical device. It is equipped with a CT14 type spring operating mechanism and is suitable for the control and protection of 35kV power transmission and distribution systems. This product features high breaking capacity, safety and reliability, frequent operation capability, and low maintenance requirements. It can also be used for tie breakers and capacitor bank switching applications.
Henan Energy Electric Equipment Co., Ltd. was established in 2011 and is an excellent and reliable transformer manufacturer in China. The company mainly develops and produces oil-immersed transformers, dry-type transformers, box-type substations and high and low voltage complete sets of equipment.The equipment put into production and operation of the project advocates energy saving, intelligence, information and mechanization. The company has established the Henan Triangle Energy-saving Transformer Engineering Technology Research Center,with 71 utility model patents and 15 invention patents.With years of accumulation in the transformer industry and strong technological innovation capabilities, HZEC products are sold to the Middle East, North America, South America, Europe, Southeast Asia, Africa and other regions, covering more than 40 countries.
Operating Environmental Conditions
1 Sunlight: 1000 W/m²
2 Relative Humidity: Daily average: not exceeding 95%; Monthly average: not exceeding 90%
3 Wind Speed: Not exceeding 34 m/s
4 Earthquake Resistance: Horizontal acceleration: 0.250 g; Vertical acceleration: 0.125 g
5 Pollution Level: Class I (25 mm/kV)
6 Ice Thickness: 10 mm (when wind speed does not exceed 15 m/s)
7 Protection Level: IP5X
| Item | Parameter | ||||
| Altitude | 1000m | 2000m | |||
| Ambient Temperature | -30ºC-40ºC | -40ºC-40ºC | -30ºC-40ºC | -40ºC-40ºC | |
| Rated Voltage | 40.5kV | ||||
| Rated Current | 2000A | ||||
| Rated Short-Circuit Breaking Current (Isc) | 31.5kA | 25kA | 31.5kA | 25kA | |
| Rated Short-Circuit Making Current (Peak Value) | 80kA | 63kA | 80kA | 63kA | |
| Rated Short-Time Withstand Current (RMS Value) 3s | 31.5kA | 25kA | 31.5kA | 25kA | |
| Rated No-Voltage Breaking Current | IscX25%(kA) | ||||
| 1-Minute Power-Frequency Withstand Voltage (RMS Value) | Across Contacts | 95+24 kV | 95kV | 95kV | 95kV |
| To Ground | 95kV | 95kV | 95kV | 95kV | |
| Lightning Impulse Withstand Voltage (Peak Value) | Across Contacts | 185+33 kV | 185kV | 185kV | 185kV |
| To Ground | 185kV | 185kV | 185kV | 185kV | |
| Mechanical Life | 3000Times | ||||
| Full Opening Time | ≤80ms | ||||
| Electrical Life | 20Times | ||||
Structure & Working
The circuit breaker adopts a parallel transmission method and is equipped with a CT14 spring operating mechanism. It has a three-phase separated, floor-standing tank structure with a compressed air arc extinguishing chamber. The three-phase gas is connected through copper pipes. The circuit breaker consists of outlet bushings, current transformers, arc extinguishing chamber, housing, adsorber, transmission box, linkage, chassis, and spring operating mechanism.
Arc Extinguishing Principle: The arc extinguishing principle uses SF6 gas, which has excellent arc extinguishing and insulating properties, as the arc extinguishing and insulating medium. The arc extinguishing chamber is of single compressed air structure with an axial double-blow arc principle: the circuit breaker cylinder moves relative to the stationary piston, and the SF6 gas in the cylinder is charged with SF6 gas at a pressure of 0.45 MPa gauge. During the opening process, the movable piston compresses, creating a pressure difference with the gas outside the pressure cylinder. The high-pressure SF6 gas flow generates a strong arc-blowing effect through the nozzle, forcing the arc to extinguish at the zero-crossing point.
Current Transformer: The circuit breaker can be equipped with 12 bushing-type current transformers for measurement purposes, connected to the outer casing. Each phase has two transformers installed on either side of the break, with cast aluminum housing filled with SF6 gas. The conductive rod forms the primary circuit, and the secondary circuit wires are routed through well-sealed terminal boards to the exterior. The terminal boards and the connecting wires to the mechanism box are protected by enclosures and steel pipes to prevent direct contact with the atmosphere. The current transformer ratio can be customized according to user requirements: 100~.
1.Our company provides you with project design and process design, and designs and manufactures products according to your equipment purchase plan and specific needs. And train technical and operating personnel for you.
2.The newly purchased products are provided with online assistance for installation and debugging. The products are under the lifelong service system. If problems occur in normal use, we will provide solutions within one working day after receiving user's feedback. We will try our best to get the product up and running as soon as possible. And there are regular visits by professional technicians to ensure the long-term, safe and reliable use of our products.
3.We use quality authentic materials, process and manufacture in strict compliance with ISO9001:2000 international quality management to ensure the quality of excellence and the smooth installation!
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