XRI1-I-R Directional Earth Overcurrent Protection Relay (XRI1I1R4)
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Configuration
The digital relay type XRI1IR has been designed as a time overcurrent protection device
for the use in electrical machines, lines and grids.
The protective functions of the XRI1IR can be summarized as follows:
- Definite-time overcurrent;
- inverse-time overcurrent with selectable characteristics;
- integrated determination of fault direction for application to double infeed lines or meshed systems.
It is possible to select from the following tripping characteristics:
Definite time overcurrent protection (DMT)
Inverse time overcurrent protection (IDMT) with selectable tripping characteristics:
Normal Inverse
Very Inverse
Extremely Inverse
Furthermore, the XRI1IR can be employed as a backup protection for differential and distance protection relays.
Overcurrent Protection
| Parameter | Setting Range |
|---|---|
| I> | 0.2 … 4.0 × I n |
| I>> | 1 … 40 × I n |
| tI> | 0.03 … 260 s (definite time) 0.05 … 10 s (inverse time) |
| tI>> | 0.03 … 2 s |
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
- 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.
Protection of High, Medium and Low Voltage feeders against thermal damages by overload or short circuit currents.
Directional Time-Overcurrent
Earth fault protection of High, Medium and Low Voltage feeders.