Select your business area

We use this information to provide content associated with segment of your choice.
You can change your selection any time.

Fast, simple and multi-functional, the programmable MTR-4P protection relay offers up to 13 different protection functions in six different logical categories: Voltage, current, frequency, asymmetry, load and loss of Mains (LoM). Simultaneously, the MTR-4P can be used as a dedicated measuring point reachable by communication and capable of measuring and calculating more than 50 parameters such as AC voltage, AC current, active/reactive apparent power, power factor, frequency, kWh, kvar, THD, dynamic and maximum demands.

MTR-4P is designed for use as a stand-alone protection and measuring unit or as component in large application solutions on single-phase or three-phase electrical power networks that require marine approval.

Featuring a universal power supply, the MTR-4P withstands high AC voltage inputs of up to 1000 V L-L and currents of up to 20 A. The typical response time less than 50 ms, from error occurs to trip. This makes the MTR-4P flexible and easy to install in new buildings, as replacement in retrofit projects, or even as a flexible spare part. Simply connect a USB 2.0 interface for fast and easy configuration of all setting parameters and outputs.



  • Relay output: 1


  • Relay output: 2


  • Relay output: 4

  • RS-485: X


Type Item number
MTR-4P-105 1200510030
MTR-4P-205 1200510031
MTR-4P-415 1200510032
  • Up to 1,000 V L-L AC voltage input
  • Up to 20 A AC current input
  • Accuracy class: 0.5
  • Password protection
  • Trip time typically below 50 ms
  • Two-stage trip setting
  • Start-up delay
  • 13 different protection functions
  • RS-485 serial Modbus communication
  • Fast and simple commissioning and setup from M-set
  • Universal power supply of 19 to 300 V DC/40 to 276 V AC
  • Marine approval by GL/DNV


Sprog Dokumenter Revision
Flag eng DNV GL TAE00001SA UK.PDF A
Sprog Dokumenter Revision
Flag eng MTR-4P - Marine & Offshore (UK).pdf A
Mounting Instructions
Quick Start Guide
Sprog Dokumenter Revision
Flag eng MTR-4 quick start guide 4189300026 UK.pdf B

Leder du efter software, dokumentation eller white papers?

Hos DEIF får du gratis og ubegrænset adgang til softwareopdateringer, teknisk dokumentation og ikke mindst inspirerende rapporter om nutidens og fremtidens brancherelevante emner.