Zw20 Three Sf6 Phase Vacuum Auto Recloser Load Break Switch Air Electric Electrical Circuit Breakers

Product Description

Our factory

We are professional manufacturer of current transformer ,voltage transformer, Vacuum Circuit Breakers/Recloser,Isolation switches,Dropout Fuse Cut-out,Lightning Arresters,High and Low Voltage Cabinets,Metering Devices,Power Distribution Transformers  etc.

General

Zw20-12F series outdoor high-voltage AC boundary vacuum circuit breaker (hereinafter referred to as "boundary circuit breaker") is an outdoor high-voltage switch with three-phase AC 50Hz and a rated voltage of 12kV. It is mainly composed of a vacuum circuit breaker body, distribution automation feeder terminal, voltage transformer, control cable, etc. The circuit breaker body is equipped with a vacuum arc extinguishing chamber, a current transformer, a zero-sequence current transformer, and other components.

The boundary breaker has a remote management mode, and the protection control function and communication function can be reliably judged. The detection boundary is used for control and protection in substations, industrial and mining enterprises, and urban and rural power grids. It is especially suitable for places requiring frequent operation and urban milliampere zero sequence current and interphase fault short circuit current, so as to automatically remove single-phase ground fault and interphase short circuit fault.

The boundary breaker adopts a vacuum arc extinguishing and SF6 gas-insulated box, which adopts foreign advanced gas sealing and is explosion-proof. The overall sealing performance of insulation structure technology is excellent. Its spring operating mechanism adopts a miniaturized design, which has excellent performance and is far more reliable than the domestic traditional spring operating mechanism.

The boundary breaker shall comply with the technical standards such as High Voltage AC Circuit Breaker (GB/T1984214), High Voltage Clearing Circuit Breaker (DL/T402-2016), Technical Conditions for Ordering 12kV 40.5kV High Voltage Vacuum Circuit Breaker (DL/T403-2000) and Remote Terminal of Distribution Automation System (DL/T721-2013).

Model  And Meaning
 

TECHNICAL SPECIFICATION
No.	Item		Unit	Data
1	Rated frequency		Hz	50
2	Rated voltage		kV	12
3	Rated current		A	630	1250
4	Rated short-time power frequency withstand voltage	Interphase, to earth(wet)	kV/min	34/1
		Interphase, to earth(dry)		42/1
		Break(dry)		48/1
		Secondary circuit to earth		2/1
5	Rated lightning impulse withstand voltage	Interphase, to earth	kV	75
		Break		85
6	Rated short-circuit breaking current(virtual value)		kA	20	25
7	Rated short-circuit making current(peak)			50	63
8	Rated short-time withstand current and duration		kA/s	20/4	25/4
9	Rated peak withstand current		kA	50	63
10	Rated short-circuit breaking current breaking times		Times	30(E2)
11	SF6 gas-rated gage pressure		MPa	0
12	Main circuit resistance		μΩ	≤120
13	Rated operating voltage and rated voltage of the auxiliary circuit		V	AC/DC220,DC48,DC24
14	Mechanical life		Times	10000(M2)
Note: If the altitude is over 1000m, the rated insulation level should be modified as appropriate.

Test Reports
All products have undergone professional testing and certification.
Our Customer

Our customers are located all over the world.

Photos of Product