ZW7-40.5kV Series

Environmental Conditions

♦ Ambient temperature: -40°C~+40°C;

♦ Altitude: <1000m;

♦ Maximum wind speed is 10km/h, minimum wind speed for the rated level (132/230kv) is 3.2km/h;

♦ Earthquake intensity: <8 level;

♦ Minimum nominal creepage distance: 31mm/kV;

♦ Air pollution degree: Class IV.

Main Technical Parameters

No	Item		Unit	Value
1	Rated voltage		kV	40.5
e	Ratedinsulationlevel	1 min power frequencyDry test (fracture, inter-phase, to earth)Wet test (to earth, external insulation)	kV	95 85
e	Ratedinsulationlevel	Lightning impulse withstand voltage(peak)	kV	185
3	Rated current		A	1250, 1600, 2000, 2500
4	Rated short circuit breaking current		kA	20, 25, 31.5
5	Rated short circuit making current (peak)		kA	50, 63, 80
6	Rated peak withstand current		kA	50, 63, 80
7	Rated short time withstand current		kA	20, 25, 31.5
8	Rated operating sequence			O-0.3S-CO-180S-CO
9	Rated short circuit breaking current breaking number		times	20
10	Rated short circuit duration		s	4
11	Breaking time		s	≤0.09
12	Mechanical life		times	10000
13	Newly manufactured vacuum interrupter		Ps	≤1.33×10-3
13	Vacuum interrupter during 20-year storage time		Ps	<6.6×10-2
14	Circuit breaker net weight		kg	800
15	Clearance between open contacts		mm	22±2
16	Contact travel		mm	4±1
17	Average opening speed		m/s	1.4-1.7
18	Average closing speed		m/s	0.4-0.7
19	Contact closing bounce time		ms	≤3
20	Inter-phase opening and closing synchronism		ms	≤2
21	Closing time		ms	50≤t≤200
22	Opening time		ms	30≤t≤60
23	Each phase main circuit DC resistance (not includeCT internal resistance)		μΩ	≤100
24	Dynamic and fixed contact cumulative thickness allowed to wear		mm	3
25	Rated contact pressure		N	2500±200

General Structure Drawing and Installation Size

♦ Side-mechanism type

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♦ Mid-mechanism type

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Spring operating mechanism

main data of operating mechanism of vacuum circuit breaker

Equipped with operating mechanism	Motor model power	Closing coil data			Opening coil data
		Voltage	Resistance value	electric current	Voltage	Resistance value	electric current
		V	Q	A	V	Q	A
Ct19bw projectile Spring operating mechanism	68ZY-CJ32-A DC220V 200W	-220	190	1.2	-220	135	1.69
Ct19bw projectile Spring operating mechanism	68ZY-CJ32-A DC220V 200W	-110	73	1. 3	-110	48	2. 3

The vacuum circuit breaker is equipped with lzzbj4-35 current transformer

Ordinal date	Rated primary current (A)	Rated secondary current (a)	4S thermal stable power Stream (valid value)	Dynamic stable current (peak value)
1	50—200	5A	60Iin	150Iin
2	300—400		21kA	52.5kA
3	600—800		43kA	107. 5kA
4	1000—1250		63kA	157. 5kA
5	1500-1600		80kA	200kA

Note: Lin is the primary rated current

Structure of vacuum circuit breaker

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Secondary control diagram

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Installation diagram

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