Vacuum Interrupters

TF18-12/630-20QVacuum interrupter
TF18-12/630-20DQVacuum interrupter
TF18-12/630-20FQ Vacuum interrupter
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	50
7	Rated short-time withstanding current	kA	20
8	Rated duration of short-circuit	s	2
9	Rated short-circuit making current	kA	50
10	Rated active power load breaking current	A	630
11	Rated closed-loop breaking current	A	630
12	Rated cable charging breaking current	A	10
13	Mechanical life	Times	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	80±50
3	Counterforce of contact	N	120±50
4	Circuit resistance at low limit of rated contact force	μΩ	≤40
5	Contact erosion permission length	mm	3
6	Moving part weight	kg	0.6

Mechanical parameters of Vacuum Interrupters for Switch Disconnector Applications

№	Parameter item	Unit	Value
1	Average breaking speed	m/s	10±0.2
2	Average closing speed	m/s	0.6±0.2
3	Rated operation pressure of contact	N	700±50
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