XN2-1 Mains Decoupling Relay (XN21)
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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:
- Over- and undervoltage protection
- Over- and underfrequency protection
- Phase sequence supervision
- in addition, for the XN2-1: vector surge (fast decoupling of the generator in case of mains failure)
- in addition, for the XN2-2: df/dt (fast decoupling of the generator via frequency gradient supervision)
Connecting two-wire system (1∿ 50 … 60 Hz, 60 … 400 V), DIP-switch setting Y
Connecting three-wire system (3∿ 50 … 60 Hz, 60 … 400 V), DIP-switch setting Δ
Connecting four-wire system (3/N∿ 50 … 60 Hz, 60 … 400 V), DIP-switch setting Y or
Δ
Protection Settings
| Parameter | Setting Range |
|---|---|
| V< | 75% … 100% × V n (cont.) |
| V> | 100% … 125% × V n (cont.) |
| f< | 97.5% … 100% × f n (cont.) |
| f> | 100% … 102.5% × f n (cont.) |
| Vector surge tripping ΔΘ or df/dt supervision | 1 … 22° el. or 0.5 … 3 Hz/s |
| tv | 5 s (fixed) |
| Switching hysteresis for V<, V> | 3%, 10% |
| Switching hysteresis for f<, f> | 0.25% (fixed) |
| Blocking voltage VB< | 20% … 70% × V n (cont.) |
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.
Over- / Undervoltage protection, vector surge.
Protection of High, Medium and Low Voltage feeders against overvoltage (insulation damage) and undervoltage.
Frequency based protection: Over-/Underfrequency supervision