Voltage dip
|
Signal |
Description |
|---|---|
|
Dip event (digital) |
Active, if the half period RMS value of at least one phase is lower than the limit. |
|
Dip event Start |
Current_time – start_time, in seconds, while the event is running. |
|
Dip event Duration |
Previous duration of events, in seconds, while the event is running. |
|
Dip event Min |
Minimum half period RMS value, in V, while the event is running. |
The limit is increased by the hysteresis, if the event is active.
The limit is calculated as percentage value of the nominal voltage or as percentage value of the floating reference value.
Note: this value is calculated for each phase separately.
Voltage swell
|
Signal |
Description |
|---|---|
|
Swell event (digital) |
Active, if the half period RMS value of at least one phase is higher than the limit. |
|
Swell event Start |
Current _time – start_time, in seconds, while the event is running. |
|
Swell event Duration |
Previous duration of events, in seconds, while the event is running. |
|
Swell event Max |
Maximum half period RMS value, in V, while the event is running. |
The limit is reduced by the hysteresis, if the event is active.
The limit is calculated as percentage value of the nominal voltage or as percentage value of the floating reference value.
Note: this value is calculated for each phase separately.
Voltage interruption
|
Signal |
Description |
|---|---|
|
Interruption event (digital) |
Active, if the half period RMS value of all phases of a supply voltage grid is lower than the limit. |
|
Interruption event Start |
Current_time – start_time, in seconds, while the event is running. |
|
Interruption event Duration |
Previous duration of events, in seconds, while the event is running. |
|
Interruption event Min |
Minimum half period RMS value, in V, while the event is running. |
The limit is increased by the hysteresis, if the event is active.
The limit is calculated as percentage value of the nominal voltage.
Mains signalling
|
Signal |
Description |
|---|---|
|
Mains signalling event (digital) |
Active, if the RMS value of the mains signalling voltage on at least one phase is higher than the limit set. |
|
Mains signalling event Start |
Current_time – start_time, in seconds, while the event is running. |
|
Mains signalling event Duration |
Previous duration of events, in seconds, while the event is running. |
|
Mains signalling event Max |
Maximum RMS value of the mains signalling voltage, in V, while the event is running. |
Rapid voltage change (RVC)
|
Signal |
Description |
|---|---|
|
Rapid voltage change (digital) |
Active, if the half period RMS value of at least one phase is beyond the area Floating_average – limit or Floating_average + limit. |
|
RVC event Start |
Current_time – start_time in seconds. |
|
RVC event Duration |
Duration of the event in seconds. |
|
RVC event Delta Umax |
Maximum deviation from the floating average at the starting point of the event, in V. |
|
RVC event Delta Uss |
Change in the floating average between start and 1 second after the event, in V. |
The floating average is the arithmetic average of the last 100 (at 50 Hz) or 120 (at 60 Hz) half period RMS values. This corresponds to the average of the last second.
The limit is reduced by the hysteresis while the event is active.
Note |
|
|---|---|
 |
RVC values The event values are issued only about 1 second after the end of an event for a 10/12 period pulse, otherwise, all values are 0. The reason for this is the rule that this event must not be issued, if there is an overvoltage or undervoltage during the event. |