Using the motor itself as a sensor and without requiring any external detectors, they monitor the cos φ of the motor and stop it before a breakdown occurs caused by dry running, cavitation or closed valve.
| Model |
Motor |
Code |
RangeIB
(A) |
Motor 400 V |
| 115V |
230V |
HP |
kW |
| P19 |
THREE PHASE |
11402 |
11403 |
7 – 19,6 |
5,5 – 10 |
4 – 7,5 |
| P44 |
11422 |
11423 |
19 – 44,2 |
12,5 – 30 |
9,3 – 22 |
| P90 |
11442 |
11443 |
40 – 90,4 |
30 – 60 |
22 - 45 |
WITHOUT LEVEL SENSORS
- Without requiring level sensors to detected dry running.
- For three phase motors from 1 to 630 A and over. Cable feed through.
- Precise motor heating and cooling memory, reproduces its thermal image.
- Visual indication of tripping cause.
- Manual, remote and automatic reset.
For IN of the motor below the minimum setting IB pass the cables several times (n) through the holes in the relay IB = n x IN
For IN of the motor above the maximum setting IB use 3 CT …/5 and the relay P 19
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…
Protection Functions
- Overload
- Undercurrent
- Phase imbalance or phase loss
- Phase sequence
