EKL-4 ( A,B ) Ground Short Circuit Fault Indicator

Characteristics

The ground short-circuit fault indicator is divided into two types, A and B. The type B has a signal remote transmission function. It is a kind of automatic monitoring special device designed for urban and rural power gnid ring network distribution system based on digestion and absorption of similar advanced products at home and abroad. In a ring network power distribution system, especially in a system that uses a large number of ring load switches (Ring MainUnit), if a line short circuit or a ground fault occurs in the next-level power distribution network system, the upper-level power supply system must Break within a specified time to prevent major accidents. After the disconnection protection occurs, all systems belonging to this level of network will be powered off. By using this product, the faulty part can be quickly and accurately indicated, which greatly saves the time for finding the fault part, reduces the power outage time and power outage range, and improves the relibility of power supply.

working principle

When there is a short circuit or a ground fault in the power supply line, the electromagnetic field generated by the short circuit or the ground curent changes, so that the measuring coil of the sensor fixed on the cable generates a pulse signal, and when the value of the pulse signal reaches or exceeds the set fault current value When the fault indicator automatically remembers the fault status, the fault indicator flashes to indicate the fault, and at the same time, the fault signal is transmitted to the monitoring center through the remote alarm interface, and the staff can quickly and accurately find the fault location of the line through the fault grenade signal. Troubleshoot and restore grid power.

Wiring diagram

Ground Short Circuit Fault Indicator

Installation method and installation diagram

Installation steps are as follows:

1. The main unit of the indicator is installed on the front panel of the power distribution cabinet.

2. Install three short-circuit current sensors on the three phases A, B and C of the cable, and fasten them to the tested line.

3. Install the grounding current sensor at the lower end of the three-way cable of the three-phase cable, and the yoke should surround the three phases.

Guide tape type (short circuit sensor)

U-shaped hook (short-circuit sensor)

The main technical parameters