Earth-fault and short-circuit indicator

Type EKL

The earth-fault and short-circuit indicator can be used in radial networks with one input and open-ring networks which are solidly earthed or low resistance earthed.
The indication of the short-circuit is done by one or three LED indicator and one LED for earth-fault indication. The potential-free connection between the short-circuit sensors and the display unit is done by fi bre optic cables. The sensors can be mounted on screened and unscreened cables. The connection between the earth-fault sensor and the display unit is done by cable. The sensor must be mounted on screened cables. All sensors are divisible and can be retrofi tted on the cable. The display device is powered by an exchangeable lithium battery. Alternatively the display device can be connected to an auxiliary power supply that should not fail in case of a fault.

The earth-fault and short-circuit indicator type EKL consists of:

– One display unit for displaying earth-faults and short-circuits
– Three sensors type LK (page 17) for detecting short-circuits
– One sensor type SE (page 19) for detecting earth-faults

The earth-fault and short-circuit indicator type EKL is available in two versions:

Type EKL 1.2: Short-circuit indication by one common LED for all three phases
Type EKL 3.2: Short-circuit indication by one LED for each of the three phases
Both versions provide an earth-fault indication with one LED.