Vacuum Interrupters

TD-12/630-16AQY   / TD-12/630-20AQY    Vacuum Interrupters for Circuit Breaker Applications
Rated parameters 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	630
6	Rated peak withstanding current	kA	40	50
7	Rated short-time withstanding current	kA	16	20
8	Rated duration of short-circuit	s	4
9	Rated short-circuit breaking current	kA	16	20
10	Rated short-circuit making current	kA	40	50
11	Operations of short-circuit breaking current interruption	Time	30
12	Rated operating sequence		O-0.3s-CO-180s-CO
13	Rated single capacitor bank breaking current	A	400
14	Mechanical life	Time	10000
Note:①Value in transformer oil or equivalent insulation equipment.

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	80±50
3	Counterforce of contact	N	110±50
4	Circuit resistance at low limit of rated contact force	μΩ	≤40	≤25
5	Contact erosion permission length	mm	3
6	Moving part weight	kg	0.7

Mechanical parameter of Vacuum Interrupters for Circuit Breaker Applications

№	Parameter item	Unit	value
1	Average opening speed	m/s	1.0±0.3
2	Average closing speed	m/s	0.55±0.15
3	Rated operation pressure of contact	N	1500 ±100	2000 ±100
4	Bounce duration of contact closing	ms	≤2
5	Rebound amplitude of breaking contact	mm	Undetermined
6	Out of simultaneity of contact closing and opening	ms	≤1