Application
KNB2-63 S6Z circuit-breakers are used in communication systems and PV DC systems.KNB2-63 series Miniature Circuit Breaker is nice in appearance, reasonable in structure, sound in feature and high in breaking capacity.Installed with standard din rail, it is convenient and easy in usage. It is rated working voltage to 250/500/1000V, and rated current to 63A as protection against short-circuit. It can be used as infrequent on-and-off operation and changeover.It complies with standard of IEC/EN60947-2 .
Basic specification and mainparameters
| Frame class | 63A |
| Rated working voltage | 250/500/1000V |
| Rated working current | 1, 2, 3, 4, 6, 10, 13, 16, 20, 25, 32, 40, 50, 63A |
| Making and breaking capacity | 6000kA/10000kA/15000kA |
| Poles | 1, 2,3, 4P |
| Mechanical life | 20000 |
| Electric life | 1500 |
The over-current tripping unit protection feature
| Sequence | Test current I/In | Start state | Tripping time | Expected result |
| 1 | 1.13In | Cold state | t≤1h | Not tripping |
| 2 | 1.45In | Start right after NO . 1 test | t＜1h | Tripping |
| 3 | 2.55In | Cold state | t≤0.1s | Not tripping |
| 4 | 5In | Cold state | t＜0.1s | Tripping |
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