Product details

ZW7-40.5KV Outdoor Medium Voltage Vacuum Circuit Breaker

ZW7-40.5KV series of outdoor high-voltage vacuum circuit breakers has the advantages of safe and reliable performance, easy maintenance and long maintenance cycle.

Due to the use of new insulating materials, there is no condensation on the outer side of the orphan extinguishing and the inner wall of the porcelain sleeve.

The transformer is placed in the overall structure of the mechanism box or outside the box, which is convenient for installation.

It also avoids oil and gas leakage and toxicity problems with other switches. Because the dynamic and static contacts of this circuit breaker are sealed in a vacuum interrupting chamber, using vacuum as an insulating medium and an arc extinguishing medium, it has a series of advantages that other types of switches cannot match. Therefore, ZW7-40.5KV vacuum circuit breaker is an ideal product to replace SF6 multi-oil circuit breaker.

The mechanism of the operating mechanism box of this product in the middle of the circuit breaker is a mid-mounted high-voltage vacuum circuit breaker, which is 260mm smaller than the original circuit breaker, and is suitable for installation in places with less space and location.

Feature

The product is suitable for 40.5KV, 50HZ, three-phase power distribution system, as a load distribution current, overload current and short circuit current. It can also be used in the circuit of high-voltage SVG energy storage power station as the main inlet switch.

The spacing distance is 710 mm, used for 2,000 meters and below sea level.

It can be installed at an altitude of more than 4500 meters, and the dimensions can be customized.

Specification

Parameter description			Unit	Value
Rated voltage			KV	40.5
Rated insulation level	1min power frequency withstand voltage (RMS)	Dry test	KV	95
		Wet test	KV	80
	Lightning impulse withstand voltage (peak)		KV	185
Current rating			A	1250/1600/2000
Rated short-circuit interrupting current			KA	20/25/31.5/40
Rated sequence of operations				O-0.3s-CO-180s-CO
Rated capacitor bank breaking current			A	400
Rated short-circuit breaking operation			Times	30
Rated short-circuit closing current (peak)			KA	50/63/80/100
Rated peak withstand current			KA	50/63/80
Rated short-time withstand current			KA	20/25/31.5/40
Rated short-circuit duration time			S	4
Full breaking time			S	≤0.08
Mechanical life			times	20000
Rated operating voltage and rated voltage of auxiliary circuit			V	110V,220V AC/DC
Contact opening distance			mm	22±2
Contact stroke (limit)			mm	4±1
Average opening speed			m/s	1.7±0.2
Average closing speed			m/s	0.7±0.2
Contact closing bounce time			ms	≤3
The synchronicity of the time difference between the three phases (minutes).			ms	≤2
Closing time			ms	≤150
Opening time			ms	≤60
The DC power resistance of each phase			(mΩ)	≤100