Intelligent Digital Motor Protection Relays

  • Definite/Inverse time option and various protection methods. Operating time displayed for each model. Separated display part using cables. Storage of failure causes. MODBUS communication, 4-20mA DC output.
  • Integrated digital motor protection relay based MCU(Microprocessor Control Unit): Real time processing and high precision are implemented.
  • Applicable to invertor circuits: It may be applied to the secondary inverter control circuit with its outstanding resistance to harmonic noise. Permissible frequency range is 10-200Hz. when the percentage of harmonic is more than 30%, a harmonic filter is installed. (However the ground fault  protection function should be switched off).
  • Function to store the cause(s) of failure/fault: Up to 5 motor failure events  may be saved in the system, so that the failure history can be easily identified. 
  • Up to 5 motor failure events may be saved in the system, so that the failure  history can be easily identified: The display part is separated and attached  to the front panel, so that information on current/operating time and setup can be viewed without taking out the unit. With the separated display, motor protection can be performed.
  • Communication Function: General-purpose RS485/MODBUS communication mode is offered for various system and communication network configurations. Models with analog current signal (4-20mA DC) output are compatible with systems that uses the existing TD (Transducer).
  • A wide range of reset functions: Manual/Automatic/Electrical reset functions are provided for user convenience.
  • Date information display: When a failure occurs, the date and time of failure 
  • occurrence are saved in the system to accurately identify the date of motor failure.
  • Password setting: When changing the set values, a password must be inserted. 
  • Total operating time and operating time setting: When the predefined operating time has
  • elapsed, related information is displayed so that operators may replace the motor bearing and check the refueling cycle. 
  • Terminal/Penetrated types are shared for application in various installation environments: Terminal blocks are detachable, which makes them applied to various installation environments.
  • Reliability: Thermal inverse time. inverse time and definite time modes: According to user's needs, the motor can be protected in the inverse time mode or definite time mode.

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