Vacuum Circuit Breaker

VMD2 indoor vacuum circuit breaker is our independent research and developed high level 12 vacuum circuit breaker, its main features including main galvanic circle

installed in totally-enclosed three-phase insulating drums,and its operating mechanism gets simple construction, reliable movements, equipped  with rich experience, and used in many high-end vacuum circuit breaker manufacturers.

Technical Parameters

NO	Item					Unit	Technical Date
1	Rated voltage					KV	12
2	Rated insulating level		Rated short time power frequency withstand voltage(1min)				42
			Raed lighting inpulse withstand voltage (peak)				75
3	Rated Frequency					HZ	50
4	Rated current					A	630	630	1250	1250
							1250	1250	1600	1600
									2000	2000
									2500	2500
									3150	3150
									4000	4000
5	Rated short circuit breaking current					KA	20	25	31.5	40
6	Rated short time withstand current						20	25	31.5	40
7	Rated peak withstand current						50	63	80	100
8	Rated short circuit  breaking current(peak)						50	63	80	100
9	4s thermal arrest current						20	25	31.5	40
10	Rated Dynamic stability current						50	63	80	100
11
12	Rated Condenser Banker Breaking Current					A	630/400
13	Rated Short circuit during time					S	4
14	Secondary circuit power frequency withstand voltage					V	2000
15	Rated operating voltage		Making coil			V	AC110/220    DC110/220
16			Breaking coil				AC110/220    DC110/221
17			Energy storing motor				AC110/220    DC110/222
18	Breaking time (rated voltage)					ms	20-50
19	Making time (rated voltage)					ms	35-70
20	Energy storing time					S	≤15
21	Contact making jumping time					ms	≤2
22	Average breaking speed					ms	0.9-1.3
23	Average making speed					ms	0.4-0.8
24	Contact breaking rebound scope					mm	≤3
25	Main circuit resistence						≤50(630A)
							≤45(1250A)
							≤35(1600-2000A)
							≤25(Above2500A)
26	Rated operating order						O-0.3s-CO-180s-CO