Vacuum Interrupter for 12KV Load Switch

Main Technical Specification

Type

TF310A

   VOLTAGE RATINGS AT RATED CONTACT STROKE

1

Rated frequency

Hz

50

2

Rated Voltage

kV

12

3

Rated short-time power-frequency withstand voltage (1 min)

kV

42

4

Rated lightning impulse withstand voltage

kV

75

  CURRENT RATINGS

1

Rated Current

A

630

2

Circuit resistance at lowest rated contact force

mW

≤35

3

Rated short-time withstand current

kA

12.5

4

Rated duration of short-circuit

s

3

5

Rated peak withstand current

kA

31.5

6

Rated short-circuit making Current

kA

31.5

7

Rated active load breaking current

A

630

8

Rated closed-loop breaking current

A

630

9

Rated capacity of no-load transformer

KVA

1250

10

Rated breaking current of cable charging

A

10

  MECHANICAL DATA

1

Weight of movable parts

kg

0.5

2

Closing force due to bellow and atmosphere

N

65±20

3

Force required to hold contacts open at full stroke

N

175±35

  MECHANICAL REQUIREMENTS

1

Clearance between open contacts

mm

9±1

2

Average opening speed(average of first 75% of contact gap)

m/s

0.8±0.3

3

Average closing speed(average of last 30% of contact gap)

m/s

0.6±0.2

4

Rated added external contact final force

N

700±100

Added external contact force at contact touch point

490±40

5

Contact bouncing duration at closing operation

ms

≤3

6

Closing and Opening non-simultaneity of three-phase Contacts

ms

≤2

7

Maximum Rebound during opening

mm

≤2

  LIFE

1

Storage life

years

20

2

Mechanical endurance

Times

30000

3

Contacts limit erosion

mm

3

   NOTES

Note:

Rated insulation values require external insulation,such as SF₆,oil or solid dielectric material etc.