ELECTRICAL RATINGS(3PHASE) SYMMETRICAL BASIS

1.Rated Frequency

50/60Hz

2.Rated Maximum Line to Line Voltage

12kV,r.m.s

3.Rated Power Frequency Withstand Voltage:Air

42kV,r.m.s

4.Rated Impulse Withstand Voltage:Air

95kV,Peak

5.Rated Normal Current

1250A

6.Maximum Contact Resistance at Minimum Closing Force

35Micro ohms

7.Rated Short-Time Withstand Current

20kA,r.m.s

8.Rated Duration of Short Time Current

4s

9.Rated Peak Withstand Current

50kA,r.m.s

10.Rated Short-Circuit Making Current

50kA,Peak

11.Rated Active Load Breaking Current

630A

12.Rated Closed-Loop Breaking Current

630A

13.Rated Capacity of No-Load Transformer

100A

14.Rated Cable-Charging Breaking Current

10A

15.*Rated Breaking Current of Single Capacitor Bank

400A

16.*Rated Breaking Current of Back-to-Back Capacitor Bank

400A

MECHANICAL DATA

1.Interrupter Weight(Approx.)

1.18kg

2.Moving Part Weight(Approx.)

0.58kg

3.Closing Force due to Bellow and Atmospheric

60±30N

4.Force Required to Hold Contacts open at Full Stroke

130±40N

MECHANICAL REQUIREMENTS(REF. VCB)

1.Contact Stroke

9±1 mm

2.Opening Speed(average of 75 contact gap)

1.0±0.2m/Sec

3.Maximum Overtravel During Opening

2mm

4.Maximun Rebound During Opening

2mm

5.Closing Speed(average of last 30% contact gap)

0.6±0.2m/Sec

6.Maximum Contact Bounse Duration(with maximum 2 bounces)

≤2ms

7.Rated Contact Compressive Force

1000±100N

8.Added external contact force at contact touch point

750±80N

LIFE (ESTIMATED)

1.Mechanical Life

10,000Operations

2.Contact Erosion Limit

3mm

3.Shelf Life

20Years

1.Meets or exceeds the electrical endurance requirements of class E2 for autoreclosing duty per IEC 62271-200 and JB 8738-2008.
 2.* Rated Characteristics to be given on request