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ELECTRICAL RATINGS(3PHASE) SYMMETRICAL BASIS
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| 1.Rated Frequency |
50/60Hz
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| 2.Rated Maximum Line to Line Voltage |
12kV,r.m.s
|
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3.Rated Power Frequency Withstand Voltage:Air
|
48kV,r.m.s
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| 4.Rated Impulse Withstand Voltage:Air |
95kV,Peak
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| 5.Rated Normal Current |
3150A
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| 6.Rated Short-Circuit Current(3Phase Symmetrical Basis) |
40kA,r.m.s
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| 7.Percentage D.C. Component of Rated S.C. Breaking Current |
50%
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| 8.Rated Short-Circuit Making Current |
100kA,Peak
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| 9.Rated Duration of Short Time Current |
3s
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| 10.Rated Short Time Withstand Current |
40kA,r.m.s
|
| 11.Rated Peak Withstand Current |
100kA,r.m.s
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| 12.Maximum Contact Resistance at Minimum Closing Force |
20Micro ohms
|
| 13.Capacitor Switching Capacity(Single Bank) |
400A,r.m.s
|
|
MECHANICAL DATA
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| 1.Contact Force from Atmospheric Pressure |
19.8kgF
|
|
MECHANICAL REQUIREMENTS(REF. VCB)
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| 1.Contact Stroke |
9±1 mm
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| 2.Opening Speed(average of 75 contact gap) |
0.9-1.3m/Sec
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| 3.Maximum Overtravel During Opening |
2mm
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| 4.Maximun Rebound During Opening |
2mm
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| 5.Closing Speed(average of last 30% contact gap) |
0.4-0.8m/Sec
|
| 6.Maximum Contact Bounse Duration(with maximum 2 bounces) |
0.002Sec
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| 7.Rated Contact Compressive Force |
390-450kgF
|
|
LIFE (ESTIMATED)
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| 1.Electrical Life at Rated Normal Current |
30,000Operations
|
| 2.Electrical Life at Rated Short Circuit Current |
50Operations
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| 3.Mechanical Life |
30,000Operations
|
| 4.Contact Erosion Limit |
3mm
|
| 5.Shelf Life |
30Years
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