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3 Phase by Undercurrent - P Relays

3 Phase by Undercurrent - P Relays-3 Phase by Undercurrent - P Relays

Sipariş No : 3 Phase by Undercurrent - P Relays

Suitable where the undercurrent (running wihout load) is critical. 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

3 Phase by Undercurrent - P Relays


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

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