Circuit Breakers
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Circuit Breakers
ZW7-40.5 outdoor high voltage vacuum circuit breaker
Brand: US General Electric Company
Origin: USA United States
Advantages: Vacuum
features:
ZW7-40.5 outdoor high voltage vacuum circuit breaker is three-phase AC 50Hz, rated voltage and below 40.5kv outdoor high voltage switchgear. Can be used as points, co-load current, overload current and short circuit current purposes.
Two, ZW7-40.5 environment
1, the normal conditions of use
a) ambient air temperature
The maximum temperature + 40 ℃
Minimum temperature -30 ℃
b) no more than 3000 meters above sea level
c) wind pressure does not exceed 700Pa (equivalent to wind speed 34m / s)
d) seismic intensity no more than 8
e) the level of air contamination level Ⅲ
2, special working conditions
When used in a specific operating environment, we can make the appropriate design according to the requirements of particular work environment.
Third, the product characteristics
1, ZW7-40.5 This product is the original product in our plant on the basis of improved products, in line with the relevant national standards, industry, and has passed all type tests.
2, ZW7-40.5 unique product design, small size, light weight, high strength, elegant appearance.
3, ZW7-40.5 breaker Brace hot galvanized shell is made of stainless steel, rust-proof aluminum from external components, it has a strong anti-corrosion and oxidation resistance.
4, ZW7-40.5 breaker gearbox housing is waterproof to prevent moisture inside electrical control components, transmission box equipped with a heating device.
5, the vacuum interrupter is the main component of the circuit breaker, in order to better meet the needs of outdoor products, we have designed a special vacuum interrupter of this product, it has reliable performance, long life, high breaking capacity, etc. .
6, ZW7-40.5 products with LZZBJ4-35 current, each transformer can be equipped with up to four separate coils, coil number, ratio, accuracy according to user production requirements, it may be needed in the transformation ratio 100/5 ~ 1600/5 within the selected range, measurement accuracy can be achieved 0.2 and 0.2S level, four coil turns ratio, the accuracy can be different.
Fourth, the working principle
1, ZW7-40.5 conductive circuit principle:
Current through the outlet terminals lead to the vacuum interrupter stationary end and a movable end, through a flexible connection and a current transformer leads from the outlet terminals.
2, ZW7-40.5 action principle:
Breaker control of the system through the "minute", "together" to complete the operation. A circuit breaker is operated by the actuator, the opening spring drive mechanism and connecting rod, insulation rod moves up and down to drive around the crank arm shaft so that the guide bar up and down to achieve a vacuum interrupter dynamic and static contact head points, co-movement.
Fifth, product transportation, inspection and storage
1, ZW7-40.5 breaker during transport, should be handled with care, shock, not upside down. If lifting of the breakers, must hook the four rings on the box, lifting the level of, and ensure not to touch the rope insulated rod, so as not to damage the product.
2, the user receives the circuit breaker, the following inspection work should be carried out:
a, after the removal of the box, you should first check the appearance of the switch, such as whether there are cracks porcelain sets, whether the product surface intact, nameplate data and ordering requirements are consistent.
b, unpack the packing list, check the packing documents are complete, such as certificates, brochures and other products.
3, the circuit breaker in storage should note the following:
a, long-term without the circuit breaker needed in the conductive surface coated with Vaseline industry.
b, the circuit breaker should be stored in a dry room.
