12kv vacuum arc-extinguishing chamber for telemecanique contactor

1).12kv,250~630A vacuum interrupter 2.IEC62271-200 standard 3.Free painting 4.Oxygen-free copper ring transition in sealing

 low voltage vacuum arc-extinguishing chamber for telemecanique contactor

Main Technical Data
Rated voltage	kv	12
Rated current	A	250/400/630
Rated frequency	Hz	50
Rated short-time power frequency withstand voltage(1min)	kv	42
Rated lighting impulse withstand voltage	kv	75
Rated making current	kA	2.5/4.0/6.3
Rated breaking current,max	kA	2.0/3.2/5.0
Rated breaking current,min	kA	50/80/125
Rated making current,limit	kA	2.5/4.0/6.3
Rated short-time withstand current	kA	2.5/4.0/6.3
Rated duration of short-circuit	s	4
Mechanical life	times	30×10000
Electricity life AC-3	times	25×10000
Electricity life AC-4	times	10×10000
Rated contact stroke	mm	4±1
Contact closing force due to bellows and atmosphere	N	70±30
Counterforce at rated contact stroke	N	110±40
Circuit resistance at rated contact atomsphere force	μΩ	≤60
Shelf life	years	20
Contact erosion limit	mm	3
Weight of moving parts	kg	≤0.6
Mechanical Data Required For Matched Vacuum Switchgear
Average opening speed	m/s	0.6±0.2
Average closing speed	m/s	0.3±0.1
Added contact force	N	110±10
Contact bouncing duration at closing operation	ms	≤2
Contact bouncing bank amplitude of opening operation	ms	≤2
Three-pole simultaneity	ms	≤1
Note:Rated characteristics can be given on requirment

12kv vacuum arc-extinguishing chamber for telemecanique contactor