520CS / 520CP Series - 3-Phase Current Monitor

Littelfuse Current Monitoring Relays Transducers
The 520CS and 520CP are fully-programmable, microcontroller-based, current-sensing devices designed to monitor 3-phase pumps. The 520CP is designed to work with motors that have ramp-up times of 4 seconds or less. The 520CS has a programmable motor acceleration time that can be set from 0-50 seconds.

Both current monitors protect 3-phase motors from:

  • Overcurrent
  • Undercurrent
  • Current Unbalance
  • Rapid Cycling
  • Single Phasing
  • Phase Reversal

Access specifications, certifications, check availability and order parts below

Catalog #Input
Voltage (V)
Output
Form
Mounting MethodDimensionsWeight (lbs/g)Compare
520CP115100 to 130VACSPDTFour #10 or #12 screws (3/4 in - 1 in in length)8.25 in H x 5.25 in W x 3.25 in D (209.6 x 133.4 x 82.6 mm)2.2 lbs. (35.2 oz. 997.9 g)
520CP115RX30100 to 130VACSPDTFour #10 or #12 screws (3/4 in - 1 in in length)8.25 in H x 5.25 in W x 3.25 in D (209.6 x 133.4 x 82.6 mm)2.2 lbs. (35.2 oz. 997.9 g)
520CP115RX56100 to 130VACSPDTFour #10 or #12 screws (3/4 in - 1 in in length)8.25 in H x 5.25 in W x 3.25 in D (209.6 x 133.4 x 82.6 mm)2.2 lbs. (35.2 oz. 997.9 g)
520CP230200 to 250VACSPDTFour #10 or #12 screws (3/4 in - 1 in in length)8.25 in H x 5.25 in W x 3.25 in D (209.6 x 133.4 x 82.6 mm)2.2 lbs. (35.2 oz. 997.9 g)
520CP460400 to 500VACSPDTFour #10 or #12 screws (3/4 in - 1 in in length)8.25 in H x 5.25 in W x 3.25 in D (209.6 x 133.4 x 82.6 mm)2.2 lbs. (35.2 oz. 997.9 g)
520CS115100 to 130VACSPDTFour #10 or #12 screws (3/4 in - 1 in in length)8.25 in H x 5.25 in W x 3.25 in D (209.6 x 133.4 x 82.6 mm)2.2 lbs. (35.2 oz. 997.9 g)