|
MiCOM P632
Measuring-Circuit
Monitoring
|
|
|
|
MiCOM P632
Measuring-Circuit
Monitoring
|
|
The negative- to positive-sequence current ratio is used as a criterion for measuring-circuit monitoring. The measuring-circuit monitoring function is triggered when the set ratio value, Ineg/Ipos, is exceeded and either the negative- or the positive-sequence current exceeds 0.02 Inom. After the set operate time-delay has elapsed, a warning is issued.
The measuring-circuit monitoring functions can be used to detect broken conductors on the CTs' primary sides.
| ▪ |
The functions can now be blocked individually via input signals set at MCM_x: Blocking EXT. |
| ▪ |
When the triggering condition is met an instantaneous starting signal is raised: (MCM_x: Starting). |
In the following logic diagram, the measuring-circuit monitoring function is displayed using function group MCM_1 as an example.
