XU2-AC Voltage Relay (XU2AC.)

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Product number: XU2AC.


  • XU2AC (DIP setting for Vn = 100 V / 110 V / 230 V / 400 V) – ANSI 27, 59

The voltage relay XU2AC of the easy PROFESSIONAL LINE is digital measuring relay for the supervision of two, three and four wire systems. It protects electrical power generators, consumers or general equipment against inadmissible overvoltage or undervoltage and can be used for low voltage and for medium voltage systems.

In addition it is possible to supervise the phase sequence.

2 Wire System Connection XU2AC
Connecting two-wire system, DIP-switch setting Y

3 Wire System Connection XU2AC
Connecting three-wire system, DIP-switch setting Δ

4 Wire System Connection XU2AC
Connecting four-wire system, DIP-switch setting Y or Δ

Voltage Protection

Parameter Setting Range
V< 75 … 105 × V n (cont.)
V> 95 … 125 × V n (cont.)
tV<, tV> 0 … 1 s / 0 …10 s (⌨) (cont.)
Hysteresis for V<, V> 3%, 6%, 10%

(⌨) 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.

  • Under/Over voltage protection.

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