PS-R Single phase - underload by undercurrent
Without requiring level sensor to detect dry running- For single phase motors from 3 to 16 A and over. Cable feed through
- Precise motor heating and cooling memory, reproduces its thermal image
- Visual indication of tripping cause
- Adjustable reset time for I<
Applications
Some of the most common applications in domestic, industrial and agricultural installations are as follow:
- Submersible pumps: water supply, irrigation, well dewatering, petrol stations…
- Surface pumps: sewage treatment plants, swimming pools, pressure sets, fire-fighting equipment…
- Other typical applications that require monitoring: belt drives, ventilators, conveyor belts…
Technical param.
Trip curves
Cold curve: represents the performance of the relay without any previous current flow, first start.
Warm curve: the tripping times decrease as the current flows, and are adapted
to the motor heating condition based on the thermal memory, the warm
condition (IEC-255) is reached after a current of 0.9 x IN (motor rated
current) flows during 2 hours approximately.
Connections
Dimensions
