ER12 is a measuring current transformer of the 4000 Series that allows you to measure the primary current in the system (from 50 to 250A) and bring it to a value of 5A or 1A suitable to be read by measuring instruments such as digital and analog indicators and ESAM transducers (ex. ID3004-TA, MI96C, MT-Ca, MT-C, MT-PA1 etc.). The ER12 transformer is the ideal solution for your system and guarantees an accuracy class of 0,5%, a FS5 safety factor and an insulation class E. The test voltage is 3kV for 1 ‘ and is built according to IEC 61869/1 + 2.

Cable or bus bar current transformer

  • Accuracy: 0,5%
  • Cable dimension: 4 x 35 mm
  • Bus bar dimension: 37 x 126 mm
  • Range: 800 … 3500A

Data Sheet

User Manual



Recommended accessories…

You may also like…

  • M403

    DIN RAIL multifunction meter, three-phase (3 – 4 wires or ARON) connection



    • Three-phase with display
    • Accuracy: 0,2% f.s.
    • Two alarms outputs




  • E2002

    Rear panel network analyzer for three-phase (3-4 wires or ARON) connection

    • Three-phase with display
    • Accuracy 0,5% of f.s.
    • RS485 ModBus RTU Serial interface
    • Two alarms outputs
  • E1200

    High accuracy rear panel network analyzer, three-phase (3-4 wires or ARON) connection

    • Three-phase 3-4 eires or ARON
    • Accuracy 0,2% of reading (from 5 to 100% of f.s.)
    • RS485 ModBus serial interface
    • ModBus TCP/IP on Ethernet (with web server) 
    • Energies measures
    • Harmonic analysis up to 64° harmonic