ylzzcom永利总站线路检测(股份)有限公司-BinG百科

ZW20A-12 Outdoor User Boundary Vacuum Circuit Breaker is suitable for power lines with three-phase AC 50Hz, 12Kv And below for opening and closing line load current, overload current and breaking short-circuit current. This product is widely used in urban and rural grids (in particular places with frequent operation) as 10kV distribution line section, control and protection and can be combined with relevant intelligent remote terminal to meet the demand of distribution application. This circuit breaker has excellent breaking performance, good electric properties, high reliability and long-term maintenance-free property.

S/N	Rated parameters	Unit	Parameters
1	Rated voltage	kV	12
2	Rated frequency	Hz	50/60
3	Rated current	A	630
4	Rated short-time withstand current	kA	20
5	Rated peak withstand current	kA	50
6	Rated duration of short-circuit	s	4
7	Rated short-circuit open current	kA	20
8	Rated short-circuit closing current (peak)	kA	50
9	Rated operation sequence		O-0.3s-CO-180s-CO
10	Rated active load breaking current	A	630
11	Power frequency voltage (1min) (phase-to-ground, phase-to-phase and phase-to-fracture)	kV	42/48 (dry type), 34(wet type)
12	Rated line-charging breaking current	A	10
13	Rated short circuit current breaking times	Time	30
14	Mechanical life	Time	10000
15	Resistance of contact circuit of each phase	μΩ	cable output ≤600, bushing output ≤200
16	Clearance between open contacts	mm	8±1
17	Over-travel of the contact	mm	2.5~4
18	Contact closing bounce time	ms	≤10
19	Clearance between isolating fractures	mm	25~30
20	Overtravel of isolating fracture	mm	1.2±0.2
21	Three-phase closing/opening non-synchronism	ms	≤3
22	Opening time	ms	<300
23	Sulfur hexafluoride gas rated pressure	MPa	“0”
24	Enclosure protection class		IP67

1. Vacuum arc extinguish, SF6 gas insulation, excellent breaking performance.

2. Oil-free, fully sealed, non-segregated, explosion-proof, moisture-proof and condensation-proof structure design, long-term maintenance-free property.

3. High class, fully sealed air plug design, highly reliable distribution automation interface.

4. Reasonable structural design, flexible motor and manual operation, seat type or lift type installation for convenient selection.

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