Vacuum Interrupters

TD-12 / 3150-40VK 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	3150
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	10000

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	250±60
3	Counterforce of contact	N	340±60
4	Circuit resistance at low limit of rated contact force	μΩ	≤10
5	Contact erosion permission length	mm	3
6	Moving part weight	kg	2

Mechanical parameters of Vacuum Interrupters for Circuit Breaker Applications

№	Parameter item	Unit	Value
1	Average breaking speed	m/s	1.3±0.2
2	Average closing speed	m/s	0.6±0.2
3	Rated operation pressure of contact	N	5000±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