XRW1-4 Mains Decoupling Relay (XRW147)
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Configuration
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)
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) |
- 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