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Motor & Pump Protection

Motor and Pump Protection Relays
Motor and pump protection relays prevent damage and stalls from overloads, jams, phase loss, unbalanced loads, heavy starts, overheating, undervoltage, and excessive operational cycles. The units also help ensure efficiency. Littelfuse makes multifunction relays for single-phase, three-phase, low voltage, and medium voltage motors and pumps. As optional devices justify their cost by limiting rewinds, reducing downtime, and extending the lives of motor and pumps.
  • Alternating current supply voltage ratings from 65 V ac to 600 V ac
  • Operate at between 50 Hz and 60 Hz
  • Direct current supply voltage ratings from 24 V dc to 275 V dc
  • Meet CSA standards
  • UL Recognized and UL Listed
  • Available with normally open (Form A) or combination normally open–normally closed (Form C) contacts
  • Versions available with several single pole, double throw outputs or single pole, single throw outputs
  • Wireless and ethernet communications options

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Motors are a significant investment and often run critical processes. Motor protection relays are used to protect the windings from damage due to electrical faults and thermal overloads. Adequate motor protection not only prevents motor damage, but also ensures optimal process efficiency and minimal interruption. Cost recovery when using a motor protection relay is achieved by extending the life of the motor, preventing motor rewinds and reducing downtime.