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

630A

6.Rated Short-Circuit Current(3Phase Symmetrical Basis)

20kA,r.m.s

7.Percentage D.C. Component of Rated S.C. Breaking Current

50%

8.Rated Short-Circuit Making Current

50kA,Peak

9.Rated Duration of Short Time Current

4s

10.Rated Short-Time Withstand Current

20kA,r.m.s

11.Rated Peak Withstand Current

50kA,r.m.s

12.*Maximum Contact Resistance at Minimum Closing Force

20Micro ohms

13.*Rated Breaking Current of Single Capacitor Bank

630A,r.m.s

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

400A,r.m.s

15.Rated operating sequence

o-0.3s-co-180s-co

MECHANICAL DATA

1.Interrupter Weight(Approx.)

2.48kg

2.Moving Part Weight(Approx.)

0.67kg

3.Closing Force due to Bellow and Atmospheric

80±40N

4.Force Required to Hold Contacts open at Full Stroke

120±50N

MECHANICAL REQUIREMENTS(REF. VCB)

1.Contact Stroke

9±1 mm

2.Opening Speed(average of 75 contact gap)

1.1±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

2000±200N

LIFE (ESTIMATED)

1.Electrical Life at Rated Normal Current

50,000Operations

2.Electrical Life at Rated Short Circuit Current

100Operations

3.Mechanical Life

50,000Operations

4.Contact Erosion Limit

3mm

5.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