Flag Fault indicator JYZ-FF

  • 3D poster
    click to load 3d model
  • Flag Fault indicator JYZ-FF


    JYZ-FF Flag fault indicator is an electronic fault detection device specially designed for medium voltage power distribution overhead lines. They are suitable for overhead power distribution lines <110KV. The JYZ-FF Flag fault indicator has a load self-adaptive function, which can adjust the fault tripping threshold according to the load change on site. Cooperating with the remote control unit DCU, Flag Fault indicator can realize remote and fast acquisition of fault information. The unique mechanical signs can be quickly identified even 100m away during the day, and the bright LED lights at night have a 360° viewing angle, which can quickly locate the fault point 500m away.

    Feature and Benefit

    • Flag Fault indicator

      Online monitoring of network status

      Real time sampling
      The Flag Fault indicator JYZ-FF uses a special current sensor to sample and detect the overhead network in real time, which is beneficial to the detection of ground faults and the distinction

    • Flag Fault indicator

      Remote Configuration, Remote Management

      Anytime, Anywhere
      The combination of Flag Fault indicator JYZ and Four-Faith positioning platform (SCADA) supports remote configuration parameters and firmware upgrades, frees from on-site maintenance, and greatly reduces maintenance time and costs

    • Flag Fault indicator

      Brightly colored mechanical indicator plates and LEDs

      Whether it is day or night, eye-catching mechanical signs and LEDs can make quick search possible, no need to worry about on-site fault inspection

    • Flag Fault indicator

      Various fault detection

      Fault Type Identification
      JYZ-FF fault indicator, based on years of field engineering experience, adopts a unique algorithm, which can detect ground faults, short circuit faults, and instantaneous faults in any overhead network line

    Technical Parameter

    Parameter Value
    Overhead line voltage class 5-38KV
    Network frequency 50Hz/60Hz
    Short-circuit Trip Current (Phase to Phase) 50~1200A adjustable, 1A step, 150A default
    Earth-fault Voltage Drop (Phase To Ground) Adjustable: 1% step, 30% default
    Earth-fault Response Delay Adjustable: 1 second step, 30s default
    Visual indication Red mechanical flag
    Indication Unit Reset 1. manual by magnet.
    2. remote reset through SCADA system
    3. time reset: adjustable, 1 second step, 24h default, max. 48h
    4. Auto delay reset after repower, 1 second step, 30s default max 5min, only for permanent fault
    Protection Class IP68
    Internal Type Test According to IEEE495-2007
    Operation Temperature Range -40~+70℃
    Power Supply Lithium battery type AA 3.6V / 2.7Ah, replaceable
    Battery Life 10 years
    Accuracy 0A~300A ±3A
    300A~800A ±1%
    Cable Diameter Ranges 6mm~42mm
    Blinking Frequency 10 per minute, adjustable
    Current withstand 31.5KA/4s
    Communication 433MHz from indicators to DCU

    Contact Us

    We are selling at first come, first serve basis. Please fill the contact form to request a callback or simply
    give us a call at (+86 17750019379).