The earth-fault and short-circuit indicator type EKS can be used in radial networks with one input and open-ring networks which are solidly earthed or low resistance earthed. The indication of short-circuits is done by one LED for each phase. Earth-faults are indicated by one LED . The potential-free connection between the short-circuit sensors to the display unit is done by fibre optic cables. The short-circuit sensor can be mounted on screened and unscreened cables.
The connection between the earth-fault sensors and the display unit is also done by potential-free fibre optic cables. The earth-fault sensor must be mounted on screened cables. All sensors are divisible and can be retrofitted 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.
The earth-fault and short-circuit indicator type EKL8000 can be equipped with a second relay for a separate remote indication of earth-faults and short-circuits.
The earth-fault and short-circuit indicator type EKL8000 consists of:
– One display unit for displaying the earth-fault and short-circuit
– Three sensors type LK (page 17) for detecting the short-circuit
– One sensor type LE (page 18) for detecting the earth-fault