10kV High Voltage Vacuum Circuit Breaker adopts a fully sealed permanent magnet operating mechanism, high‑altitude adapted insulation structure, online partial discharge monitoring, silent operation, and strong short‑circuit withstand capability. It meets IEC and GB standards, supports customization, and is widely used in urban power grids, industrial parks, new energy stations, unattended substations, plateau and mountain power distribution projects.

2. Product Advantages

Permanent Magnet Mechanism & Stability

Adopts sealed permanent magnet operating mechanism
No spring fatigue or mechanical wear; action accuracy ≤±1ms
Mechanical life ≥30,000 operations
Reduces power outage risk; suitable for unattended stations

High-Altitude Adaptation & Insulation

Optimized epoxy resin integrated arc extinguishing chamber
H‑class insulation; insulation strength increased by 20%
Stable operation up to 1000m altitude
Certified to GB/T 20635; no extra insulation needed
Avoids altitude‑related insulation breakdown

Low-Noise Operation & Environmental Adaptation

Silent closing design; operating noise ≤55dB
Complies with IEC 60664
Wide temperature range: -30℃ ~ +45℃
Humidity resistance up to 95%RH
Built‑in anti‑condensation heating device

Short-Circuit Withstand & Equipment Protection

Rated breaking current up to 40kA
Transverse magnetic field arc extinguishing
Breaking time ≤50ms; no reburning
Protects transformers, cables and back‑end equipment

3. Why choose us

why choose us Products?

✅ Factory Strength: 18 years export experience; 100,000 ㎡ workshop
✅ Patent & R&D: 56 national patents; professional R&D team
✅ Quality System: ISO & CE certified; full inspection
✅ Product Line: Transformers, switchgear, RMU, substations, breakers
✅ Custom Capacity: Mechanism, parameters, interface customizable
✅ Service: 12‑months warranty; one‑stop solution & on‑site support

one-stop solution

professional team

high quality

4. Product Specifications

Number	Parameter name	Unit	Technical Parameters
1	Rated voltage	kV	12
2	Rated short-time frequency withstand voltage (1 min)	kV	42
3	Rated lightning impulse withstand voltage (peak)	kV	75
4	Rated frequency	Hz	50
5	Rated current	A	630/1250/1600/2000/2500/3150/4000
6	Rated short-circuit breaking current	kA	20	25	31.5	40
7	Rated short-time withstand current	kA	20	25	31.5	40
8	Rated short circuit duration	S	4
9	Rated short-circuit closing current	kA	50	63	80	100
10	Rated peak withstand current	kA	50	63	80	100
11	Number of rated short-circuit current starts	times	30	30	30	20
12	Rated individual capacitor bank opening current	A	≤630
13	Rated back-to-back capacitor bank opening current	A	≤400
14	Rated capacitor bank closing inrush current	kA	12.5(frequency≤1000Hz)
15	Closing time	ms	≤80
16	Split time	ms	Maximum Voltage		≤40
		ms	Rated Voltage		≤50
		ms	Minimum Voltage		≤60
17	Time of ignition	ms	≤15
18	Mechanical life (M2)	times	30000
19	Allowable cumulative thickness of dynamic and static contact wear	mm	3
20	Rated closing operating voltage	V	AC/DC 220, AC/DC 110
21	Rated breaking operating voltage	V	AC/DC 220, AC/DC 110
22	Rated operating voltage of energy storage motor	V	AC/DC 220, AC/DC 110
23	Rated power of energy storage motor	W	80 (40KA Motor speed 100W)
24	Energy storage time	s	≤15
25	Contact opening distance	mm	9±1
26	Over traveling distance	mm	3.5±0.5
27	Contact closing bounce time	ms	≤2
28	Three-phase switching and closing non-synchronous	ms	≤2
29	Contact splitting rebound amplitude	mm	≤3
30	Contact closing contact pressure	kA	20	25	31.5	40
30	Contact closing contact pressure	N±8%	2200	2500	3100	4750
31	Average breaking speed (contacts separated by 6mm)	m/s	1.1±0.2
32	Average closing speed (6mm contact closure)	m/s	0.6±0.2
33	Dominant electric circuit resistance	A	630	1250	1600-2000	≥2500
34	Dominant electric circuit resistance	μΩ	≤50	≤45	≤35	≤25
34	Rated operating sequence (1) 20~31.5KA		Minutes - 0.3s - combined minutes - 180s - combined minutes
35	Rated sequence of operation (2) 40KA		Minutes - 0.3s - combined minutes - 180s - combined minutes
35	Secondary circuit frequency withstand voltage (1min)	V	2000