General description:

Short circuit and earth fault indicator is divided into two types A and B, type B with signal remote transmission function. Its in the digestion absorption Based
on similar advanced products at home and abroad, for urban and rural power grid ring network distribution system design of a special automatic monitoring
device.In a Ring network power distribution system, especially in the extensive use of Ring net load switch (Ring Main Unit) system, if happened to the next
level in the distribution network system short circuit or ground fault, at the next higher level power supply system must be specified in between the breaker, in
order to prevent major accidents. In the breaker protection, belonging to the level of network system All the power. Through the use of this product, can
rapidly and accurately indicate the faulty parts, greatly save the lookup Part of the time, reduce the outage time and power scope, improve power supply
reliability.

Working Principle:

When the power supply circuit has a short circuit or earth fault occurs, the short circuit current in earth or produce electromagnetic field changes, fixed in Cable

sensors on the measuring coil produce pulse signal, when the value of the pulsesignal reach or exceed the size of the set of fault The current value, fault

indicator automatically memory fault state, fault indicator lights flashing issued instructions, at the same time by long range alarm interface, and the fault signal

transmitted to the monitoring center, the staff through fault indicator signal can promptly and accurately to line fault location, timely troubleshooting, restore

power supply.

Main Function:

1. Short circuit fault alarm indication: Short-circuit fault sensor installed on single phase cable, monitoring the current changes of the power supply line in

time, when the current change value reach or exceed short circuit current- 1 -EKL4 Fault Indicator

action when the alarm set point (this value can be setting according to user requirements before producing),the short circuit fault sensor emit alarm signal,

the signal through optical fiber sent to the indicator host, the corresponding fault indicator light flashing, Send out alarm indicator.

2. Earth fault alarm indication: Earth fault sensors installed on the bifurcation unshielded part of three-phase cable, detection of three-phase cable of zero

sequence current value, when its value reach or exceed the earth current action when the alarm set point(this value can be setting according to user

requirements before producing), the earth fault sensor emit alarm signal,the signal through optical fiber sent to the indicator host, the earth fault indicator

light flashing, Send out alarm indicator.

3. Battery low battery alarm indication: When the indicator host internal battery voltage drops to 2.5 V, generate alarm signal,to mention maintenance

personnel change the battery, the alarm signal lasts about two months. Furthermore it equipped with an external power supply interface,can use an

external power source.(Type B terminal 12 “-“, 9 “+”; Type A terminal 8 “+”, 9 “-” AC/DC5V-10V).

4. Remote alarm and reset: After the short circuit or earth fault occurred, indicator sends the corresponding alarm signal at same time, cooperate with

the distribution network automation (FTU) devices, and fault alarm signal can be transmitted to remote monitoring center, can also do remote manual reset

operation.

5. Automatic reset: When the indicator emit alarm signals, In a set of automatic reset time, without manual reset, the indicator can be automatically

reset.(Reset time: 4H.8H.12H.24H, open the host signs in the dial the code switch setting on its own)

6. Test and Reset: When the indicator emit alarm signals, press the indicator host “reset/test” button on the panel, can clear alarm status. In the normal state,

hold down the indicator host “reset/test” button on the panel for 3 seconds, Panel on all the lights flashing 10 times. Type B also have relais working sound,

this means the indicator is in normal working

Main technical parameters:

Short Circuit Warning Current: 200-1500A Selectable (accuracy: ± 10%)Delay 20-300 ms when ordering can be selected by the user (The default factory Settings:800A. 20ms)

Earth Fault Warning Current: 5-50A Selectable (accuracy:±10%)Delay 20-300 ms when ordering can be selected by the user (The default factory Settings:20A.20ms)

Short circuit sensor mounted cable diameter: outside diameter ≤ Φ 40mm (other specifications shall be customized)

Earth fault sensor mounted cable diameter: outside diameter ≤ Φ 120mm (other specifications shall be customized)

Working Ambient Temperature:-40℃ ~ +75℃

Relative Humidity: ≤95%RH

Prevent Water, Acid and Salt fog

Working Power Supply: Lithium batteries or AC/DC（5V-10V）±15%

Remote Signal Contact Capacity: AC220V/1A

Remote Signal Contact Reset Method: Manual reset / Auto reset

Automatic Reset Time: 1-48H Selectable (accuracy:±5%) when ordering can beselected by the user (The default factory Settings:12H)

Indicator Host Boundary Dimension: 97×48×79mm

Indicator Host Installing Hole Size: 91.5mm x 43mm (tolerance:±0.3mm)

Sensor Optical fiber Length: 3m (4 pieces) (other specifications shall be customized)

Suitable for medium voltage below 35KV rating system.

Standard Configuration:

Indicator Host………………………………1 piece

Short Circuit Fault Sensor………………3 pieces

Earth Fault Sensor…………………………1 piece

Sensor Optical fiber……………………….4 pieces