Vacuum Interrupters

TD14-12/4000-63Q Vacuum Interrupters for Circuit Breaker Applications
Specifications of Vacuum Interrupter:

№	Parameter item	Unit	Value
1	Rated voltage	kV	12
2	Rated short-time power frequency withstanding voltage	kV	42
3	Rated lighting impulse withstanding voltage	kV	75
4	Rated frequency	Hz	50
5	Rated current	A	4000
6	Rated peak withstanding current	kA	160
7	Rated short-time withstanding current	kA	63
8	Duration of Rated short-circuit	s	4
9	Rated short-circuit breaking current	kA	63
10	Rated short-circuit making current	kA	160
11	Breaking times of rated short-circuit current	Times	20
12	Rated operating sequence		O-180s-CO-180s-CO
13	Rated single capacitor breaking current	A	630
14	Mechanical life	Times	10000

Mechanical parameters of vacuum interrupter:

№	Parameter item	Unit	Value
1	Contact gap	mm	9±1
2	Contact closing force	N	350±80
3	Counterforce of contact	N	420±80
4	Circuit resistance	μΩ	≤10
5	Contact abrasion thickness	mm	3
6	Weight of moving parts	kg	4.7

Mechanical parameters of Vacuum Interrupters for Circuit Breaker Applications

№	Parameter item	Unit	Value
1	Average breaking speed	m/s	1.4±0.2
2	Average closing speed	m/s	0.65±0.15
3	Rated operation pressure of contact	N	10000±1000
4	Bounce duration of contact closing	ms	≤2
5	Rebound amplitude of breaking contact	mm	undetermined
6	Out of simultaneity of contact closing and breaking	ms	﹤1