Vacuum Interrupters

TD-12 / 2000-40VE     Vacuum Interrupters for Circuit Breaker Applications
Rated parameter of vacuum interrupter

№	Parameter item	Unit	Value
1	Rated voltage	kV	12
2	Rated power-frequency withstanding voltage	kV	42
3	Rated lighting impulses withstanding voltage	kV	75
4	Rated frequency	Hz	50
5	Rated current	A	2000
6	Rated peak withstanding current	kA	100
7	Rated short-time withstanding current	kA	40
8	Rated duration of short-circuit	S	4
9	Rated short-circuit breaking current	kA	40
10	Rated short-circuit making current	kA	100
11	Breaking times of short-circuit current	Time	30
12	Rated operating sequence		O-0.3s-CO-180s-CO
13	Rated single capacitor bank breaking current	A	630
14	Mechanical life	Time	30000

Mechanical parameters of vacuum interrupter:

№	Parameter item	Unit	Value
1	Rated contact gap	Mm	9±1
2	Contact closing force due to bellows and atmosphere	N	120±50
3	Counterforce of contact	N	180±50
4	Circuit resistance at low limit of rated contact force	μΩ	≤15
5	Contact erosion permission length	Mm	3
6	Moving part weight	Kg	1.5

Mechanical parameters of Vacuum Interrupters for Circuit Breaker Applications

№	Parameter item	Unit	Value
1	Average breaking speed	m/s	1.1±0.2
2	Average closing speed	m/s	0.6±0.2
3	Rated operation pressure of contact	N	4300±300
4	Bounce duration of contact closing	Ms	≤2
5	Rebound amplitude of breaking contact	Mm	≤2
6	Out of simultaneity of contact closing and opening	Ms	＜1