ZW7-40.5 Series Outdoor High Voltage Vacuum Circuit Breaker (Recloser)

Short Description:

ZW7-40.5 outdoor HV vacuum circuit breaker is a 3-phase AC 50Hz 40.5kV outdoor switch equipment.
♦ Installation way: foundation installation;
♦ Operating mechanism: spring operating mechanism and electromagnetic operating mechanism;
♦ Pole material: silicone rubber, ceramic;
♦ Application: outdoor 33kV substation, power plant.
♦ Current transformer: in-buit installation, external installation.

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Description

Product Standards
♦ IEC62271-100 High Voltage Switchgear and Controlgear Part 100: AC Circuit-breakers
♦ GB1984 High Voltage AC Circuit-breakers
♦ GB/T11022 Common Specifications for High-voltage Switchgear and Controlgear Standards
♦ JB/T 3855 High Voltage AC Vacuum Circuit-breakers
♦ DL/T402 Specification of High-voltage AC Circuit-breakers

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
		Lightning impulse withstand voltage(peak)		185
3	Rated current		A	1250, 1600, 2000, 2500
4	Rated short circuit breaking current		kA	20, 25, 31.5

No	Item	Unit	Value
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