Three-phase relay PRI-53 for monitoring the current in three-phase devices.
Intended for monitoring the current in three-phase devices (e.g. cranes, motors, etc.)
24-240 V AC/DC power supply galvanically separated from the circuit of the monitored current
Adjustable current level in % of In:
Fixed difference level
Adjustable delay level (when exceeding the preset limit)
Adjustable function:
- UNDER - monitors the drop in the strength of current below the preset value I
- OVER - exceeding the preset value I
2 types depending on the strength of rated current In (1A, 5A)
6-MODULE, DIN rail mounting
Output relay with 2 changeover contacts
Option of connecting via the current transformers to increase the value of the monitored current by up to 600A
UNDER function:
If the strength of the monitored current in all phases exceeds the preset level I, the relay is triggered and the red LED is off. If the strength of the monitored current drops in any phase below the level I, the relay is disconnected after the preset delay timing elapses and the red LED goes on. The red LED fl ashes during the delay. If the strength of the monitored current returns above the level I + difference, the relay is triggered without delay and the red LED goes off.
OVER function:
If the strength of the monitored current is lower in all phases than the preset level I, the relay is disconnected and
the red LED is off. If the strength of the monitored current exceeds in any phase the level I, the relay is triggered after the preset delay timing elapses and the red LED goes on. The red LED flashes during the delay. If the strength of the monitored current again drops below the level I – difference, the relay is disconnected without delay and the red LED goes off.
