ZW17-40.5KV Outdoor Vacuum Circuit Breaker

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1. Product Overview
ZW17-40.5KV outdoor vacuum circuit breaker is a three-phase AC 50Hz or 60 Hz high-voltage electrical apparatus with the rated voltage of 40.5 KV. It is used for closing and opening the load current, over-load current, and short-circuit current. It is particularly suitable for use in occasions requiring frequent operations.

2. Features
In addition to the vacuum circuit breaker's common characteristics, i.e., long mechanical life, long electrical life, and little maintenance, our ZW17-40.5KV has the following features.
a. It is equipped with the domestic well-known vacuum arc chute which is safe, reliable, and of long service life;
b. Adopting new insulating materials, our product is free from the troubles like air inflation and oil aeration;
c. The current transformer adopted has characteristics of high precision, high capacity, multiple transformation ratio, and multiple output;
d. Our ZW17-40.5KV circuit breaker is equipped with the CT19W-I spring operating mechanism which features small operating power and long service life (mechanical life of 10,000 times). When the voltage is DC220V, the closing current is 1.8A and the tripping current is 2.5A;
e. Exquisite appearance:
aa. The porcelain bushing and flange are cast together, which have high strength and reliable performance;
bb. A phase sequence cap is adopted to avoid water leakage;
cc. The underframe has been processed with the hot dip galvanized anti-corrosion technology;
dd. The seal plate and mechanism box have good sealing performance.

3. Technical Parameters of ZW17-40.5KV Outdoor Vacuum Circuit Breaker
Table 1

No.	Item	Unit	Data
1	Rated voltage	KV	40.5
2	Rated current	A	1600, 2000
3	Rated short-circuit breaking current	KA	20, 25, 31.5
4	Rated short circuit making current	KA	50, 63, 80
5	Rated thermal current (rms)	KA	20, 25, 31.5
6	Rated dynamic current (peak)	KA	50, 63, 80
7	Rated thermal stabilization time	s	4
8	Times of breaking rated short circuit current	times	20
9	Rated operating sequence		Open-0.3 s – close open -180 s – close open
10	1min Power frequency withstand voltage (rms)	KV	Dry test		95
			Wet test		80
11	Lightning impulse withstand voltage (peak)	KV	185
12	Rated operating voltage and rated voltage of auxiliary circuits	V	AC	220
			DC	220, 110
13	Rated current of overcurrent tripping device	A	5
12	Mechanical life	times	10000

Table 2

No.	Item	Unit	Data
1	Contact opening distance	mm	22 ± 2
2	Contact spring compression stroke	mm	4 ± 1
3	Three-phase break-brake synchronism	ms	≤ 2
4	Closing bounce	ms	≤ 3
6	Phase-to-phase spacing	mm	730
7	Average opening speed	m/s	1.6 ± 0.2
8	Average closing speed	m/s	0.4~0.9
9	Permissible wear thickness of static and dynamic contact	mm	3

4. Service and Installation Conditions

Ambient temperature	-30℃~ 40℃ (-40℃~ 40℃ for special order)
Permissible maximum daily temperature difference	25℃
Altitude	≤1000m (customers should inform us if the product is used above 1,000m)
Relative humidity	Daily average: ≤95%, 25℃ Monthly average: ≤90%
Wind pressure	≤ 700Pa
Sunshine intensity	0.1 W/cm2 under the 0.5m/s wind velocity
Earthquake intensity	VIII, Mercalli
The installation site should have no flammable substances, explosion, chemical corrosion or severe vibration.

5. Dimensions

Related Names
Vacuum Recloser | 3 Phase HV Circuit Breaker | Electrical Safety Switch

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