ZW7-40.5 Highland Outdoor Vacuum Circuit Breaker is designed for three-phase AC 50Hz systems with a rated voltage of 40.5 kV, specifically for outdoor high-voltage equipment at altitudes of up to 3000 meters. It can be used to switch load currents, overload currents, and short-circuit currents.

This product features a rational structure and is easy to maintain. It can be equipped with current transformers, enabling multi-variable and multi-winding configurations to meet the diverse needs of metering, measurement, and protection.

Product Specifications

Specification Sheet

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Shenzhen Mandarin Oriental Hotel

No.	Name	Unit	Data
1	Rated Voltage	kV	40.5
2	Rated Frequency	Hz	50
3	Rated Current	A	630/1250/1600/2000/2500
4	Rated Power Frequency Withstand Voltage	kV	85(Wet Testing) / 95(Dry Testing)
5	Rated Lighting Impulse Withstand Voltage	kV	185
6	Rated Short-Circuit Breaking Current	kA	25/31.5
7	Rated Short-Circuit Making Current (Peak)	kA	63/80
8	Rated Withstand Current (Peak)	kA	63/80
9	Rated Duration of Short-Circuit	s	4
10	Operating Cycles at Rated Short-Circuit Breaking Current	Cycles	E2
11	Mechanical Endurance	Times	10000
12	Standard Operating Sequence	-	O-0.3s-CO-180s-CO
13	Allowable Wear Thickness of Contact	mm	≤3

Mechanical characteristics

No.	Name	Unit	Data
1	Clearance between Moved and Fixed Contact	mm	19±2
2	Contact Overtravel	mm	4±1
3	Average Closing Speed	m/s	0.8±0.2
4	Average Opening Speed (Average Speed of First Opening at 12mm)	m/s	1.7±0.3
5	Rated Contact Pressure	N	3100±200N (25kA/31.5kA) 4800±300N(40kA)
6	Closing Time	ms	30～70
7	Opening Time	ms	20～50
8	Contact Bouncing Duration at Closing Operation	ms	≤3
9	No-Simultaneity of Closing/Opening Operations of 3-Phase	ms	≤2

product advantages

ZW7-40.5 Highland Outdoor Vacuum Circuit Breaker has many advantages:

Circuit Breaker Performance

E2-C2-M2

Easy Maintenance

Featuring a modular design, the on/off coil can be replaced without removing other components. Users can easily replace it, and no testing or adjustments are required after replacement, making future maintenance more convenient.

Standardized outdoor design

The porcelain column design meets the requirements of Level IV pollution environments, offering excellent waterproof and anti-corrosion performance. It also includes an integrated temperature and humidity controller.

Wide Application Range

Designed to withstand harsh environments, the product can endure temperatures as low as -40°C and meets the requirements for use at altitudes of up to 3000 meters.