Quick Detail
Place of Origin
Brand Name
Fullde
Model Number
LW58-252/T4000-50
HS-CODE
85-
Package & Delivery Lead Time
Package
Standard export package
Delivery Lead Time
25 working days
Detailed Description
Product Description and Application
*Outdoor self-contained power high voltage SF6 circuit breaker is suitable for the electric power system of Ac 50Hz and 252kV, which is the control and protection equipment for the electric power system, as well as for circuit breaker connection.
* The product uses SF6 gas as the arc extinguishing and insulation medium, adopting the self-contained power arc extinguishing double-action-type interrupter structure technique, equipped with new-type spring operating mechanism., with features of strong switching ability, less operating power, and higher reliability, the technical indicators have reached similar products in domestic and international advanced level.
* Single phase SF6 circuit breaker, which is operated by one mechanism for one pole, is changed to three-phase mechanical linkage circuit breaker which is operated by one mechanism. The decrease of mechanism improves the linkage reliability for three-phase SF6 circuit breaker to avoid lack of phase operation.
Key Features:
*Adopting the self-contained power arc extinguishing and double-action-type structure technique;
*This products has less operating power ,high reliability and mechanical endurance up to 6,000 times;
*Dynamic and static contact using copper tungsten arc overall sintered structure, withstand high temperature, under the arc burning in a small, full breaking capacity of more than 20 times;
* Reliable sealing performance: it is guaranteed that the SF6 gas has an annual leakage of far less than 0.5 percent;
*Strict dehumidification process for component parts of the product:the SF6 moisture content is far lower than similar products;
*The circuit breaker has high insulation level and the creepage distance is more than 25mm/kV, 31 mm/kV;
*The valve plate of the arc extinguishing compartment is made of new-type light weight Zinc-base alloy.compared with the traditional materials adopted for similar products,this material has more stable and reliable gas feature and breaking performance.
*The nozzle is made of import PTFe mixed with other micro-components.It has stable breaking performance and strong ablation resistance;
* Electrical units in secondary circuit and SF6 density relay are hign-quality import or joint-venture products;
*The important component parts in the mechanism are forged with quality alloy steel for high strength and abrasion resistant, which can ensure low fault rate under frequent operation of the breaker.
*The hydraulic spring operation mechanism for three phase SF6 circuit breaker is swift. And it has good load property and low noise. Its speed is easy to adjust. Besides it adopts modular construction so that it has high reliability and is easy to maintain.
The main specifications of the breaker
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No | Name | | Unit | Data |
1 | Rated Voltage | | kV | 252 |
2 | Rated Power Frequency Withstand Voltage(1min) | To earth | kV | 460 |
Across open breaks | 460+146 |
3 | Rated Lightening impulse withstand voltage | To earth | 1050 |
Across open breaks | 1050+206 |
4 | Rated Frequency | Hz | 50 |
5 | Rated Current | A | 4000 |
6 | Rated short-circuit breaking current Isc | kA | 50 |
7 | Rated short-circuit making current (peak) | 125 |
8 | Rated short-time withstand current | 50 |
9 | Rated peak withstand current | 125 |
10 | Rated out-of-phase breaking current | 12.5 |
11 | Short-line fault breaking current | 90%Isc, 75%Isc |
12 | The number of rated short circuit breaking current Ik | Times | 20 |
13 | Rated duration of short circuit | S | 3 |
14 | First-pole-to-clear Factor | | 1.3 |
15 | Rated line-charging making current | A | 200 |
16 | Mechanical endurance | Times | 6000 |
17 | Opening time | ms | 305 |
18 | Closing time | ms | 100 |
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