XU1-E Earth Fault Voltage Relay (XU1E.)

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Product number: XU1E.


  • XU1E (DIP setting for 50 Hz / 60 Hz) – ANSI 59N

The relay XU1E of the easy PROFESSIONAL LINE is a digital relay for earth fault detection in isolated and resistively earthed medium voltage systems. Digital filters ensure a suppression of harmonics.

The relay can be connected to the open e-n winding of the voltage transformer.

Connection XU1E

Earth Fault Voltage Protection

Parameter Setting Range
UE> (VG>) 1 … 120 V (cont.)
tUE> (tVG>) 0 … 10 s / 0 …100 s (⌨) (cont.)
Hysteresis for UE<, UE> 1%, 2%, 5%

(⌨) Different setting ranges via DIP switches. ( Smart view covers the whole range.)

Auxiliary Voltage

Voltage supply via wide-range power supply unit:

Auxiliary voltage range

50 … 750 V DC or

36 … 520 V AC (f = 35 … 78 Hz)

Power consumption

approx. 4 W (terminals A1 and A3)

  • Fast DIN rail mounting    easy and fast mounting
  • Sealable plastic covers    safe (see if anybody has broken the seal)
  • Super easy settings via front buttons    fast without computer
  • LED and output relays fault indication    easy to find out what has happened
  • Compact form factor    fits in small spaces
  • IT security    no way to attack via Ethernet
  • Robust and reliable    well proven reliable quality
  • Wide Range Power Supply    don’t worry about available supply voltage
  • Integrated Self-Test Procedure (via button)    fast and easy checks: relays, LEDs
  • For all relays except XD1-G and except XRI...: optional interface adapter XRS1 (order code XRS1A or XRS1*);

    for all XRI... [except XD1-G]: optional adapter RS485 to USB (order code RSC2485USB1):

      easy doing high precision settings via Windows ® PC software »Smart view«

  • Interconnection of renewable energies (DER: distributed energy resources) to the public grid.

  • Residual voltage protection.

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