ZW20-12F outdoor pole-mounted high-voltage intelligent vacuum circuit breaker

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Overview

The ZW20-12F outdoor pole-mounted high-voltage intelligent vacuum circuit breaker is a 12kV, three-phase AC, 50Hz outdoor high-voltage switchgear. It is primarily used for interrupting and closing load current, overload current, and short-circuit current in power systems. It is suitable for protection and control in substations, industrial and mining enterprises, and urban and rural power distribution networks, particularly in locations with frequent operations and in automated urban distribution networks. This product, when used with a controller, meets the requirements of distribution automation systems and reliably and efficiently performs the functions of a traditional recloser. It utilizes a proven box-type sealed structure filled with SF6 gas, providing excellent sealing properties that protect it from environmental influences and making it maintenance-free. Its spring-operated mechanism utilizes a direct-acting chain main drive and a multi-stage tripping system, resulting in high operational reliability, making it an excellent choice for pole-mounted circuit breakers.

Model meaning

ZW20-12F outdoor pole-mounted high-voltage intelligent vacuum circuit breaker

Main technical parameters

Project	Unit	Parameter
Rated voltage	kV	12
Rated frequency	Hz	50
Rated current	A	630、1000
Rated short-circuit breaking current	kA	16、20、25
Rated peak withstand current (peak	kA	40、50、63
Rated short-time withstand current (4s)	kA	16、20、25
Rated short-circuit making current (peak value)	kA	40、50、63
Mechanical life	次	10000
Rated current breaking times	次	10000
Rated short-circuit breaking current breaking times	次	30
Power frequency withstand voltage (1min): phase to phase, to ground/break	kV	42/48
Lightning impulse withstand voltage (peak) between phases, to ground/break	kV	75/85
Secondary circuit 1mi power frequency withstand voltage	kV	2
Net weight	kg	140

Mechanical characteristic parameters

Project	Unit	Parameter
Contact opening distance	mm	9
Contact overtravel	mm	3
Opening speed	m/s	1.2±0.2
Closing speed	m/s	0.6±0.2
Contact closing bounce time	ms	≤2
Phase center distance	mm	135+ 1.5
External live air insulation distance	mm	240±2
External creepage distance	cm/kv	3.8
Three-phase opening in a different phase	ms	≤2
Each phase conductive circuit	μΩ	≤150
Closing time	ms	≤45
Opening time	ms	＜45
Energy storage motor rated power	W	≯40
Energy storage motor rated voltage	V	AC220
Rated closing operating voltage	V	AC220
Maximum/minimum closing operating voltage	V	AC264/143
Rated opening operating voltage	V	AC220
Maximum/minimum tripping operating voltage	V	AC264/143
Maximum/minimum motor voltage	V	AC242/187
SF6 gas rated pressure (gauge pressure)	MPa	"0"