Relay bảo vệ động cơ 3 pha trường hợp Thấp dòng – P
Phù hợp những trường hợp thấp dòng khi hoạt động không tải là quan trọng.
Suitable where the undercurrent (running wihout load) is critical.
- Without requiring level sensors to detect dry running.
- For three phase motors from 1 to 630 A and over. Cable feed through.
- Precise motor heating and memory, reproduces its thermal image.
- Visual indication of tripping cause.
- Manual, remote and automatic reset.
Some of the most common applications in domestic, industrial and agricultural installations are as follow: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
- 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
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