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ZW20-12 Outdoor column vacuum circuit breaker

Zw20-12 outdoor high voltage vacuum circuit breaker (hereinafter referred to as "circuit breaker") Outdoor power distribution equipment with rated voltage of 12kV and three-phase AC 50Hz. Vacuum arc extinguishing and SF & gas are used as insulating medium. It is mainly used to switch off the load current, overload current and short-circuit current of rural power network, urban power network and small power system. The overall structure of the product is three-phase common box type. The three-phase vacuum arc extinguishing chamber is placed in the metal box, with reliable voltage transformation performance and high insulation strength.
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Product overview
Zw20-12 outdoor high voltage vacuum circuit breaker (hereinafter referred to as "circuit breaker") Outdoor power distribution equipment with rated voltage of 12kV and three-phase AC 50Hz. Vacuum arc extinguishing and SF & gas are used as insulating medium. It is mainly used to switch off the load current, overload current and short-circuit current of rural power network, urban power network and small power system. The overall structure of the product is three-phase common box type. The three-phase vacuum arc extinguishing chamber is placed in the metal box, with reliable voltage transformation performance and high insulation strength.

 

型号含义

ZW

20

12

T

630

25

Outdoor column vacuum circuit breaker Design serial number: 20 (box type) Rated voltage: 12KV Spring operating mechanism Rated current: 630A Short time withstand current: 25kA

 

Working conditions
◊ altitude: no more than 2000m;
◊ ambient air temperature: - 40 ° C ~ + 40 ° C, daily temperature difference: the daily temperature change shall not be greater than 25 ° C;
◊ wind speed: no more than 35m / S;
◊ there are no places with flammability, explosion hazard, strong chemical corrosion (such as various acids, alkalis or thick smoke) and violent vibration.

 

Technical parameter

Project

Company Parameter value
Rated voltage

kV

12

Rated frequency

Hz

50

Rated current

A

630

Temperature rise test current  

1.1lr

Rated power frequency Imin withstand voltage (phase to ground)

kV

42

Rated power frequency Imin withstand voltage (fracture)

kV

48

Peak value of rated lightning impulse withstand voltage (phase to ground)

kV

75

Peak value of rated lightning impulse withstand voltage (port)

kV

85

Rated short-time withstand current

kA

25

Rated short-time withstand current duration

s

4

Rated peak withstand current

kA

63

Loop resistance

μΩ

≤120

Mechanical life  

10000

Partial discharge (1.1ur)  

≤10pC

Degree of protection  

IP67

Rated pressure of SF6 gas (20 ° C gauge pressure)

MPa

0

Annual leakage rate of SF6 gas  

<0.1%

 

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