ZN85-40.5 Drawout Type Indoor High-voltage Vacuum Circuit Breaker price_Manufacturer_How much

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ZN85-40.5 Drawout Type Indoor High-voltage Vacuum Circuit Breaker

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Zhejiang Ziguang Electrical Equipment Co., Ltd.

Located Region:

China

Address:

No.3, 22nd Street, Eastern New District, Wenling City, Taizhou City, Zhejiang Province

Biz Consulting:

010-83910265

E-mail:

1728896342@qq.com

Online Contact

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The ZN85-40.5 drawout type indoor high-voltage vacuum circuit breaker is designed for three-phase AC power systems rated at 40.5kV and 50Hz. It is widely used in industrial and mining enterprises, power plants, and substations for frequent switching operations, serving as a control and protection device. The product's technical performance complies with GB1984-2014 "High-voltage Alternating Current Circuit Breakers," JB3855-1996 "3.6-40.5kV Indoor AC High-voltage Vacuum Circuit Breakers," and IEC standards.

This product adopts an integrated and modular vertical layout structure. The three-phase vacuum interrupter is housed in an insulated cylinder mounted on the upper part of the frame, while the spring operating mechanism is installed in the lower cabinet. The overall design is simple, compact, and easy to maintain, providing reliable breaking and closing capabilities for load currents, overload currents, and short-circuit currents in power systems.

No.	Item		Unit	Value
1	Rated voltage		kV	40.5
2	Rated Insulation Level	1-minute power frequency withstand voltage (phase-to-phase, phase-to-earth, across isolating distance)	kV	95
		Lightning impulse withstand voltage (phase-to-phase, phase-to-earth, across isolating distance)	kV	185
3	Rated frequency		Hz	50
4	Rated current		A	1250	1600		2000
5	Rated short time withstand current (4s)		kA	25		31.5
6	Rated peak withstand current		kA	60		80
7	Rated short circuit breaking current		kA	25		31.5
8	Rated short circuit making current		kA	63		80
9	Rated operating sequence			O-0.3s-CO-180s-CO
10	Rated short-circuit breaking current breaking times		Times	20
11	Rated capacitor bank breaking current		A	630
12	Rated control voltage (DC or AC)		V	220；110
13	Mechanical life		Times	10000

Mechanical Characteristics Parameter Table After Circuit Breaker Assembly and Adjustment

No.	Item	Unit	Value
1	Contact Opening Distance	mm	20±2
2	Contact Stroke	mm	4±1
3	Average Closing Speed	m/s	0.8±0.2
4	Average Opening Speed	m/s	1.8±0.2
5	Opening Time (Rated Voltage)	ms	≤50
6	Closing Time (Rated Voltage)	ms	≤100
7	Contact Closing Bounce Time	ms	≤3
8	Three-phase Closing Asynchrony	ms	≤2
9	Cumulative Allowable Wear Thickness of Moving and Static Contacts	mm	3
10	Main Circuit Resistance	μΩ	≤70