XI1ER 5A / Directional Earth Overcurrent

5A / Directional Earth Overcurrent for Compensated or Isolated Grids. High Precision. IEC 60255-1


15 / Directional Earth Overcurrent for Compensated or Isolated Grids. High Precision.

Basic time delay accuracy: 0.5 % or ±25 ms.

Basic accuracy of characteristic quantities: ±2 % of IE the setting value or ±0.002 x IN ±1 % of Ue or ±0,5 V.

Real current component meas. in compensated systems: IE x cos φ.

Reactive current component meas. in isolated systems: IE x sin φ. Accuracy of measured angle at Ue > 20 V: ± 6° at IE = 0.002 x IN, ± 3° at IE = 0.005 x IN, ± 2° at IE = 0.010 x IN, ± 1° at IE ≥ 0.015 x IN . 250 x In (half cycle), 100 x In for 1s, 30 x In for 10 s, 4 x In continuous

The XI1E of the PROFFESIONAL LINE is an all-purpose protection against earth faults, used for electrical machines, lines and isolated or compensated systems; it is mainly used in radial networks. Very often the XI1E can be found as backup protection at the central earthing point of the system. It detects all earth faults occuring in the system.

Relay variant XI1E-R with directional current sensing is a selective earth-fault protection and is normally used in ring systems, networks with parallel feeders and in complex meshed systems.

The XI1E is compliant with IEC 60255-1.

Order Variants of the XI1E

XI1E1 (1 A) – ANSI 50Ns, 51Ns
XI1E5 (5 A) – ANSI 50Ns, 51Ns
XI1ER1 (1 A) – ANSI 50Ns, 51Ns, 67Ns
XI1ER5 (5 A) – ANSI 50Ns, 51Ns, 67Ns
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
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