Customer circuit breakers
The following table shows the maximum circuit breaker ratings based on input voltage for the rack mount configuration.
| Line-Line Input Voltage Range (V) | System Rated Current (A) | Circuit Breaker |
|---|---|---|
| 200 - 240 V AC | 48A | 60/63A |
| 380 - 415 V AC | 24A | 32/30A |
Note: Small currents can appear on the server earth ground connection under normal server operation.
For most reliable operation, circuit breakers that react to currents detected on ground (e.g. Earth Leakage Circuit Breakers or Residual Current Circuit Breakers) are not recommended for use with rack mount. By internal design and grounding, rack mount is fully certified for safe operation without them (meets IEC, EN, UL, CSA 60950-1 and 62368-1 standards).
However, if leakage detection circuit breakers are required by local electrical practice, they can be used up to 100 mA. To safeguard against spurious tripping:
- The Data Center ground grid should be constructed in accordance with best practices to avoid significant voltage gradients.
- The facility power infrastructure should be as reliable as possible.
- The utility connections from the breaker panel to the two or four power cord inputs should be reasonably equal in length or at least no one connection should be much shorter than the others.
If spurious tripping is experienced, corrections must be made in one or more of the above areas.