ZW32A-12G Outdoor High Voltage Vacuum Circuit Breaker Isolating Switch Combination Electrical ApplianceDetailed product description：

1. Overview
ZW32A-12G outdoor high-voltage vacuum circuit breaker with isolating switch combination (hereinafter referred to as the combination) is an outdoor high-voltage distribution equipment with three-phase AC 50Hz and 12kV, used for breaking and closing load current, overload current, and short-circuit current in power systems, and is more suitable for places with frequent operations.
Combination electrical appliances, using CTB spring operated mechanism, can achieve electric energy storage, electric opening and closing, as well as manual energy storage and manual opening and closing.
Combination electrical appliances have interlocking and obvious visible fractures, ensuring safe operation and reliable interlocking.
The arc extinguishing device of the composite electrical appliance adopts outdoor epoxy casting technology, which integrates the vacuum arc extinguishing chamber and the current transformer into a solid insulation phase column component. It is vertically arranged in a phase separated manner, maintenance free, oil-free, gas free, and pollution-free.
Combination electrical appliance, with surge control function for closing, meets control and measurement requirements, equipped with electronic control unit, and can achieve "four remote" monitoring. This product is the preferred choice for the oil-free transformation of urban and rural power grids.
2. Normal usage conditions
a) Altitude: not exceeding 2000m;
b) Surrounding air temperature: upper limit+40 ℃, lower limit -40 ℃;
c) The wind pressure shall not exceed 700Pa (equivalent to a wind speed of 34m/s);
d) The degree of air pollution (level) shall not exceed level III;
e) Any requirements beyond the above conditions shall be agreed upon by the user and the manufacturing unit.

3. Main Technical Parameters of ZW32A-12G Outdoor High Voltage Vacuum Circuit Breaker Isolating Switch Combination Electrical Appliance
3.1 Technical parameters of circuit breaker:

serial number	parameter name			unit	data
					12.5kA	16kA	20kA
one	rated voltage			kV	twelve
two	Rated insulation level	1-minute power frequency withstand voltage	Dry test		Interphase and ground 42, fracture 48
			wet test		External insulation 34
		Lightning impulse withstand voltage (peak value)			Interphase, ground 75, fracture 85
three	rated frequency			Hz	fifty
four	rated current			A	six hundred and thirty
five	Rated short-circuit breaking current			kA	twelve point five	sixteen	twenty
six	Rated short-circuit closing current (peak)				thirty-one point five	forty	fifty
seven	Rated peak withstand current				thirty-one point five	forty	fifty
eight	4s rated short-time withstand current				twenty-one point five	sixteen	twenty
nine	Rated operating sequence				Min-0.3s HeFen-180s HeFen
ten	Closing time/Opening time			ms	25～50/15～50
eleven	Rated short-circuit breaking current breaking times			time	thirty
twelve	mechanical life				ten thousand
thirteen	Control circuit and auxiliary circuit 1-minute power frequency withstand voltage			V	two thousand
fourteen	Rated operating voltage auxiliary circuit rated voltage				DC220； AC220
fifteen	over-current release		rated current	A	five
			Accuracy of tripping current	%	±10
sixteen	Contact distance/contact stroke			mm	9±1/2±0.5
seventeen	Center distance between phases				340±1.5
eighteen	Average closing speed/average opening speed			m/s	0.6±0.2/1.2±0.3
nineteen	Contact closing bounce time/three-phase opening and closing synchronicity			ms	≤2/≤2
twenty	Resistance of each phase circuit			μΩ	≤80

3.2 Technical parameters of isolation switch:

serial number	parameter name		unit	data
				16kA	20kA
one	rated voltage		kV	twelve
two	1-minute power frequency withstand voltage	Dry test		Interphase and ground 42, fracture 48
		wet test		External insulation 34
three	rated current		A	six hundred and thirty
four	rated frequency		Hz	fifty
five	Rated peak withstand current		kA	forty	fifty
six	4s rated short-time withstand current			sixteen	twenty
seven	Lightning impulse withstand voltage (peak value)		kV	seventy-five
eight	Circuit resistance (between circuit breaker terminal and isolation switch incoming board)		μΩ	≤120
nine	When the three-phase knife switch is closed, the center offset		mm	≤2
ten	Synchronization deviation of three-phase knife switch closing			≤2
eleven	Fracture distance			≥200
twelve	Insulation distance between conductive parts and the ground			≥160

ZW32A-12G Outdoor High Voltage Vacuum Circuit Breaker Isolating Switch Combination Electrical Appliance