The EKL3 short circuit and ground fault indicator is a device used to detect short circuits and ground faults. In the ring network distribution system, especially in systems that extensively use ring network load switches, if a short circuit fault or grounding fault occurs in the lower level distribution network system, the upper level power supply system must be disconnected within the specified time to prevent major accidents. By using this product, the faulty part can be marked. Maintenance personnel can quickly locate the faulty section based on the alarm signal of this indicator, disconnect the faulty section, and promptly restore power supply to the fault free section, which can save a lot of work time, reduce power outage time and scope.

Design
The short circuit and ground fault indicator consists of the following parts:
Three short-circuit fault sensors
A ground fault sensor
A reading instrument
The connecting wire is a cable and/or optical cable
The reading instrument is installed in a plastic box, which is equipped with a time reset circuit and an assignment circuit. Ground faults are indicated by a flashing LED light, and short circuit faults on each cable are indicated by a flashing LED light. The reading instrument is equipped with a test/reset button. Each sensor consists of a plastic housing and a coil that detects pulse currents caused by short circuits and ground faults. Depending on the version of the sensor, it can be connected to wires or fixed to the sensor, or plugged into a fiber optic sensor. The housing is injection molded and meets IP usage conditions. Fiber optic cables can safely transmit data between sensors and reading instruments through high-voltage zones. This type of fiber optic cable is made of PMMA and has an effective length of up to 10 meters
Main technical parameters:
Short circuit fault action current: 150A-1500A
Ground fault action current: 10A-100A
Accuracy: ± 10%
Environmental temperature: -25 to+70 ℃
Environmental humidity:+40 ℃ Relative humidity ≤ 95%
Power: standby ≤ 0.01mA; indication ≤ 0.5mA
Power supply: Lithium battery 3.6V/2.25Ah
Automatic reset time: adjustable from 7Sec-2h-4h-8h, other settings can be reserved
Output relay contact capacity: 230V AC 1A/125VDC 1A/30VDC 2A
Dimensions (W × H × D)
Panel mounted reading instrument: 92 × 46 × 63mm
Surface mounted reading instrument: 92 × 140 × 42mm
sensor
Short circuit sensor: 38 × 38 × 26mm
Ground fault sensor: 38 × 38 × 26mm

EKL product features:
1. Short circuit alarm indication: The short circuit sensor constantly detects the current in the power supply line. When its value reaches or exceeds the short-circuit current2. Grounding alarm indication: When the grounding sensor detects that the current in the grounding line reaches or exceeds the grounding current threshold (which can be set before leaving the factory according to user requirements), an alarm signal is sent. After the host receives this signal through cable or optical fiber, a corresponding alarm indication signal is generated (the indicator light flashes).
3. Low battery warning indicator: When the battery voltage inside the indicator drops from 3.6V to 2.7V, an alarm signal is generated to prompt maintenance personnel to replace the battery.
4. Remote transmission of alarm information: The indicator host can drive corresponding relay actions based on different alarm indication signals for remote signal transmission.
5. Automatic reset: When the indicator generates an alarm, within the set time, if there is no manual reset, the indicator can be automatically reset.
6. Testing and resetting: When the indicator generates an alarm and the fault is eliminated (the indicator light flashes slowly), the alarm status can be cleared by pressing the button on the indicator host panel. In normal state (without alarm signal), press and hold the button on the front panel for 1 second. The short circuit and grounding alarm indicators on the panel will flash, and the fault remote relay will be engaged, indicating that the working state is normal. After becoming slow flashing (2 seconds later), press this button again to restore normal state.