Phase Rotation
|
Field |
Description |
|---|---|
|
Applications |
This feature monitors the phase rotation of the source opposite from the connected source. In order to check phase rotation, both voltage sources must be applied. It protects against equipment damage by preventing transfer to a source that is out of phase. This occurs during new installations or after storm damage or generator rewiring (U-G). NOTE: Only A-B-C sequence is correct and sequence C-B-A
is wrong.
It is available only for TransferPacT Active Automatic. |
|
Default value |
This feature could be enabled or disabled. By default, it is enabled. |
|
Detection Criteria |
When the power source is normal, phase angle differences is to be checked (PhaseA – PhaseB/PhaseB – Phase A). It should be 120°/240°±5° and if the sequence C-B-A, then it is a wrong sequence. |