70.31 Line Monitoring Relay

Function and Features

Type 70.31 – Line voltage monitoring relay for three-phase networks. Multi-function model for monitoring three-phase (380 … 415)V undervoltage, overvoltage, window mode (overvoltage + undervoltage), phase rotation and phase loss (detects phase loss error even in the presence of regenerated voltages)
Voltage fault memory – selectable.
Three-phase voltage control relay Type 70.31

Features include:

  • Positive safety logic (make output contact opens when the measured value is out of limits)
  • All functions and rating can be easily set using the front face selector and trimmer
  • “Blade + cross” – both flat blade and cross head screwdrivers can be used to select the function, adjust the trimmer and release the rail clip
  • Clear and immediate identification of the status through colored LEDs
  • 1 changeover output contact – rated 6 A
  • Modular, 35 mm wide
  • 35 mm rail (EN 60715) mounting
  • Cadmium-Free Contacts

Applications

  • Air conditioners
  • Woodprocessing machines
  • Hoists and cranes
  • Escalators
  • Control panels for pumps
  • Forced-air ventilators

Technical Data

Contact Specification
Contact Configuration 2 CO (DPDT)
Rated Current/ Maximum Peak Current (A) 10/20*
Rated Voltage / Maximum switching voltage (V AC) 250/400
Coil Specification
Nominal Voltage (V AC) 110 – 120 – 230 – 240
Nominal Voltage (V DC) 5 – 6 – 7 – 9 – 12 – 14 – 18 – 21 – 24 – 28 – 48 – 60 – 110 – 125

Approvals

Downloads

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