ZW7-40.5 outdoor high voltage vacuum circuit breaker

ZW7-40.5 outdoor high-voltage vacuum circuit breaker is used in three-phase power systems with AC 50H2 and rated voltage of 40.5kV to disconnect and close load current, overload current and short-circuit current.

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Overview

Model meaning

ZW7-40.5 outdoor high voltage vacuum circuit breaker

Main functions

Adopting vacuum arc extinguishing, strong breaking capacity, long electrical life and mechanical life of 10,000 times;

Simple structure, maintenance-free, and long maintenance cycle;

Good insulation performance and strong anti-fouling ability;

Can be equipped with spring or electromagnetic operating mechanism, with reliable mechanical performance and can be operated frequently;

No fire and explosion hazards;

Built-in current transformer with calculation accuracy up to 0.2 level, which can realize three-phase dynamic protection;

The built-in condensation controller can keep the circuit breaker running reliably under certain temperature and humidity.

Operating environment conditions

Air temperature: upper limit +40℃, lower limit -30℃;

Altitude: ≤2000m (if the altitude needs to be increased, the rated insulation level will be increased accordingly);

Wind pressure: no more than 700Pa (equivalent to wind speed 34m/s);

Earthquake intensity: 8 degrees;

Pollution level: Level III;

Maximum daily temperature difference: no more than 25℃

Main technical parameters

Project			Unit	Parameter
Rated voltage			kV	40.5
Rated insulation level	Power frequency withstand voltage	Dry	kV	95
		Wet	kV	80
	Lightning impulse withstand voltage (peak)		kV	185
Rated current			A	1250、1600、2000
Rated short-circuit breaking current			kA	20、25、31.5
Rated operating sequence				分-0.3S合分-180S合分
Rated short-circuit current breaking times			次	12
Rated short-circuit closing current (peak value)			kA	50、63、80
Rated peak withstand current			kA	50、63、80
Rated short-time withstand current			kA	20、25、31.5
Rated short-circuit continuous current			S	4
Average opening speed			m/s	1.5±0.2
Average closing speed			m/s	0.7±0.2
Contact closing bounce time			S	≤2
Three-phase closing (opening) synchronism time difference			S	≤2
Closing time			S	≤150
Opening time			S	≤60
Mechanical life			次	10000
Rated operating voltage and auxiliary circuit rated voltage			V	DC220、110、24
Rated operating voltage and auxiliary circuit rated voltage			V	AC220、110、24
Rated operating voltage and auxiliary circuit rated voltage			μΩ	≤100
Allowable wear thickness of moving and static contacts			mm	3
Weight			kg	800