XRW1-4 mains_decoupling_protection_device

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Documentation (Brochures & Manuals)

The relay XN2 of the easy PROFESSIONAL LINE is a universal mains decoupling relay and contains the protective functions required for the mains parallel operation of power stations:

The protective functions of the XRW1 can be summarized as follows:

  • Over- and undervoltage protection
  • Over- and underfrequency protection
  • df/dt (fast decoupling of the generator via frequency gradient supervision)

Connection XRW1

Protection Settings

Parameter Setting Range
Voltage stages V1<, V1> … V4<, V4>

V n = 690 V: 4 … 800 V

tV1<, tV1>, tV2<, tV2> 0.2 … 1500 s 
tV3<, tV3>, tV4<, tV4> 0.04 … 300 s 
Rated frequency f N 50 Hz, 60 Hz
Frequency meas. repetition T 2 … 99 cycles
Frequency elements f 1, f 2, f 3

f N = 50 Hz: 30 … 49.99 Hz, 50.01 … 70 Hz

f N = 60 Hz: 40 … 59.99 Hz, 60.01 … 80 Hz

Tripping delay t 1, t 2, t 3

t f,min … 50 s, where:

(The lower limit t f,min depends on the setting value T, see User Manual.)

df/dt supervision

df: 0.2 … 10 Hz/s

meas. repetition dt: 2 … 64 periods

Voltage threshold VB< for frequency meas.

V n = 690 V: 20 … 400 V

Auxiliary Voltage

Voltage supply via wide-range power supply unit:

Auxiliary voltage range

16 … 360 V DC or

16 … 270 V AC

Power consumption

standby: approx. 3 W

operating: approx. 5 W (terminals C9, E9)

Benefits of the Professional Line

  • 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
  • Operating range −25°C to 70°C (except XRI...: −10°C … 55°C)
  • 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


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

  • Over- / Undervoltage protection.

  • Protection of High, Medium and Low Voltage feeders against overvoltage (insulation damage) and undervoltage.

  • Frequency based protection: Over-/Underfrequency supervision

    Load shedding by ROCOF

Inputs and Outputs
Binary inputs 2
Output relays 4
Voltage transformer inputs 3
Watchdog relay 1
Protection ANSI
Voltage protection 27/59
Frequency protection 810/81U
Frequency gradient 81
Additional Features
Fault recorder (none volatile)
Parameter sets 1
Mounting Type
Housing suitable for DIN rail mounting

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