Shanghai Huabang Industrial Business Network - fault indicator

[fault indicator]EKL1-2 Four in one overhead fault indicator

2026-6-14 10:59:49

The EKL1-2 series overhead fault indicator is installed on 6-35KV transmission and distribution lines as a device for indicating the flow of fault current. In case of a fault in the line, the patrol personnel can quickly determine the faulty section and locate the fault point by using the red alarm display of the indicator. Greatly improving work efficiency, shortening power outage time, and effectively enhancing the reliability of power supply. Our company relies on the scientific research advantages of Tsinghua University to propose a new fault detection method based on the summary of existing fault detection devices, and has applied for a national invention patent. The fault detection device has a novel detection method, which is not only reliable in action and stable in performance, but also extremely simple and convenient to install and remove.

EKL1-2 four in one overhead fault indicator features:

Fault indication: During normal operation, the window is displayed in white; When a short circuit or grounding fault occurs, the window will display red during the day and light up at night.
Online operation: directly installed on overhead power lines, maintenance free.
Strong anti-interference ability: The signal is not affected by the line, excitation inrush current, high-order harmonics, current fluctuations, especially the distributed capacitance branch of the cable
Automatic reset: After the indicator action flips, it will automatically reset according to the set time.
Live loading and unloading: Live loading and unloading are extremely simple and do not affect the operation of the line.

Applicable routes
Used for 6-35kV overhead bare wires and insulated wires
Specially designed for 6-35KV cable lines

Installation location
The middle section and branch entrance of a long line can indicate the faulty section and branch of the line.
Substation exit: It can be determined whether it is an internal or external fault.
At the high-voltage incoming line of the user distribution transformer: it can be determined whether the fault is caused by the user.
Connection between cable and overhead line: Can distinguish whether the fault is in the cable section.

[fault indicator]EKL2-1 Cable type fault indicator that can be installed with electricity

2026-6-14 10:59:38

The EKL2-1 cable type fault indicator, which can be installed with electricity, is suitable for detecting and indicating cable grounding faults in cable distribution boxes, ring network switchgear, and other equipment. The indicator is embedded with advanced microchips, which have advantages such as intelligence and low power consumption. When a ground fault occurs in the circuit, the indicator detects the short-circuit current and performs arithmetic processing to memorize the fault status, and the red light starts flashing continuously. After the automatic reset time, the red light stops flashing, the indicator automatically resets, and the fault record is cleared.

Technical parameters of EKL2-1 cable type fault indicator for live installation:
Short circuit action current �� 20A (error ± 10%, adjustable according to requirements)
Short circuit response time: 0.02s �� T �� 4S
Working environment range: -40 �� -+85 ��
Working power supply: Equipped with a built-in 2000mAh lithium battery, with a service life of 8-10 years and a voltage of 3V. Automatic reset time: 12 hours (optional, users can confirm at the time of ordering). Easy loading and unloading operation: requires specialized installation tools and can be equipped with a live loading and unloading indicator. Line range: Cable diameter (with outer sheath) �ܦ� 40mm

[fault indicator]DS-300 Intelligent Cable Fault Tester

2026-6-14 10:37:33

The DS-300 intelligent cable fault tester is a cable fault tester specially designed and produced for oilfield logging cables. It is a nationally unique instrument with high sensitivity and stable performance.

Technical indicators
Single end testing distance: within 8km
Relative error: ��± 2%
Working environment temperature: -20 ��~+50 ��
Test blind spot: �� 15m
Fixed point error: �� 1m

[fault indicator]DS-200 Cable Fault Tester and Management System

2026-6-14 10:37:22

Technical specifications of DS-200 cable fault tester and management system

Input voltage: 220V ± 10% 50Hz
Test blind spot: �� 15m
Fixed point error: �� 1m
Volume: (455 × 300 × 190) mm
Single end testing distance: within 8km
Relative error: ��± 2%
Working environment temperature: -20 ��~+50 ��
Weight: 8kg

[fault indicator]DS-100 Cable Fault Tester

2026-6-14 10:37:11

Introduction to the functions of DS-100 cable fault tester
Can test low resistance, short circuit, high resistance, open circuit and other faults of various power cables below 35KV.
Can test and calibrate cable length.
Can test the propagation speed of radio waves in cables.
Can accurately locate the location of cable burial.
Cooperating with high-voltage equipment can accurately locate the fault point.

characteristic
The DS-100 cable fault tester model integrates distance measurement, path finding, and positioning, and is equipped with a micro printer that can be printed on site for easy operation
Make and carry. Adopting LCD display. Human computer dialogue, experts suggest using a dual vertical light cursor for operation, therefore
Automatic display of obstacle distance. The test results can be stored and printed. Memory test wiring diagram and standard waveform.

Technical specifications of DS-100 cable fault tester
Input voltage: 220V ± 10% 50Hz
Test blind spot: �� 15m
Fixed point error: 0.5m
Volume: (455 × 315 × 195) mm
Single end testing distance: within 8km
Relative error: ��± 2%
Working environment temperature: -20 ��~+50 ��
Weight: 9kg

[fault indicator]DS-3PY Line Fault Online Intelligent Monitoring System

2026-6-14 10:37:08

DS-3PY Line Fault Online Intelligent Monitoring System

In the 6-35kV neutral point ungrounded operation system, there are many branches of the line, multiple operation modes, low reliability of power supply, time-consuming and laborious fault inquiry, and a large workload of maintaining the line. In addition, the detection of single-phase grounding faults has always been a difficult problem for the power system. Theft and cutting of electrical wires are also common occurrences. The DS-3PY line fault online intelligent monitoring system is a line fault alarm and monitoring system applied to the power supply system. It can monitor the operation of the line in real time, and automatically send information to maintenance personnel in case of short circuit faults, grounding faults, power outages, or power transmission situations. The fault location is displayed on the computer.

Target function
Short circuit faults, single-phase grounding faults, power outages, power transmission, phase loss, overcurrent, etc. can also fundamentally require additional functions

Disadvantages of traditional products
1. The low current grounding line selection device can only detect the grounding fault of a certain outgoing line first, and due to various reasons, its reliability is not high.
2. Various fault indicator display methods are not suitable for searching, and maintenance personnel need to go out along the line to see if the fault indicator is displaying.

Advantages of DS-3PY Line Fault Online Intelligent Monitoring System
1. Not only can it indicate which outgoing line is faulty, but it can also display which branch segment is faulty.
2. You don't need to go out to search anymore, you can see the location of the fault point on the computer.
3. You can also send the fault point to the on duty personnel's mobile phone.
4. The remote transmission system is not limited by distance.

DS-3PY Line Fault Online Intelligent Monitoring System

[fault indicator]MI6IS type electromagnetic fault indicator

2026-6-14 10:06:35

The MI6IS electromagnetic fault indicator has a small size, light weight, compact structure, easy operation, high sensitivity, and can be widely used for fault indication in aviation, electronics, and other fields

Specification: 28VDC
Size: 51.3mm × 18.5mm × 20mm
Weight: �� 36g

[fault indicator]Z1-SE Short circuit grounding 2 Combined with 1 fault indicator

2026-6-14 9:53:14

Z1-SE Short Circuit Grounding 2-in-1 Fault Indicator Product Function and Features

Display mode: daytime flip card display, night vision reflection within 360 º �� range can be observed.
Identifying faults has the function of identifying ground short circuit faults, and can distinguish between permanent faults and transient faults.
Fault diagnosis can only be given in the event of a ground short circuit fault, sudden change in current, and after the switch trips, without the need to set action values.
When suppressing the surge current during power transmission, the indicator detects the excitation current and locks the circuit to prevent the fault indicator from malfunctioning.
Online operation is directly installed on power lines (overhead lines or busbars) and can operate outdoors for a long time without maintenance.
Special tools for live loading and unloading applications can be installed and removed with electricity, and there will be no false alarms during the loading and unloading process.
The night vision reflective display board adopts night vision reflective technology for easy observation at night.
Rust resistant and corrosion-resistant structural components are made of rust resistant and corrosion-resistant materials

2�� Schematic diagram of grounding short circuit of overhead line
Short circuit detection: As shown in the figure, when a short circuit fault occurs in the circuit, the short circuit fault indicator senses the fault current, and the display window of the indicator will change from white to red (or from no light to light). Based on the fact that the B-phase indicators 2, 5, 8 on Line 2 and the C-phase indicators 3, 6, and 9 on Line 3 have flipped over (or lit up), while the indicators 11 and 12 have not flipped over (or lit up), it can be quickly determined that the fault is at point D.

Grounding detection principle: Grounding detection principle: Sample the first half wave of the capacitance current at the moment of grounding and the first half wave of the voltage at the moment of grounding, compare their phases. When the capacitance current at the moment of sampling grounding suddenly changes and exceeds a certain value, and is in phase with the first half wave of the voltage at the moment of grounding, and the wire to ground voltage decreases at the same time, it is judged that the line has been grounded. Otherwise, the line has not been grounded. As shown in the figure, if the indicators 3, 6, and 9 of phase C on line 2 flip over and the indicator 12 still does not move, it can be determined that a grounding fault has occurred at point D.

3�� Z1-SE short-circuit grounding 2-in-1 fault indicator action criterion
(1) It �� 160A. It is the starting value of the sudden variable current
(2) �� I �� 0.5I0 �� I is the current change rate I0 is the line current before the short circuit
(3) I=0, I is the current after the line fault
(4) 0.06S �� T �� 3S �� T is the sudden change time of current

4�� Z1-SE Short Circuit Grounding 2-in-1 Fault Indicator Technical Parameters
Applicable voltage: 6-35kV, parameters may vary for different voltage levels
Load current 0-1200A
Applicable wire outer diameter 25 mm2-400 mm2
The default factory setting for fault reset time is 12h and 24h (can also be adjusted according to user requirements)
Applicable ambient temperature -35 ��~75 ��
Capable of performing actions �� 5000 times
Weight �� 500g
Battery life>10 years
Device service life>10 years
Wind resistance capacity: wind speed of 150km/h, cannot be loosened

5�� Loading and unloading of Z1-SE short-circuit grounding 2-in-1 fault indicator
For short-circuit fault indicators installed on overhead lines, specialized installation tools can be used for live installation and disassembly. Installation instructions for Z1-SEII overhead short-circuit grounding four in one fault indicator.

[fault indicator]SEK-F type panel fault indicator

2026-6-13 21:21:38

1�� Product Introduction
The SEK-F panel fault indicator is a real-time monitoring device installed on the ring network switch, cable branch box, and box transformer in the distribution network system, used to indicate short circuits and single-phase grounding faults in corresponding cable sections. When a fault occurs in the line, the staff can use the alarm indication of the indicator to quickly determine the faulty section and locate the fault point. At the same time, the alarm information can be sent in real time to the server in the monitoring center, and the area and specific location of the fault can be displayed on the screen of the monitoring computer, guiding the line patrol personnel to quickly determine the fault section and find the fault point. This indicator provides the best way to solve the problem of fault finding. It is of great significance to improve work efficiency, shorten power outage time, quickly restore power supply, enhance power supply reliability and economic benefits.

2�� The panel type fault detection device consists of two parts:
A�� Host B, short circuit (grounding) sensor

3�� Main functions of SEK-F panel fault indicator
1. Short circuit alarm indication: The short circuit sensor detects the current of the circuit during operation. When a short circuit fault occurs in the circuit and the fault current reaches or exceeds the alarm current setting value, the short circuit sensor sends an alarm signal, which is transmitted to the host through optical fiber. After the host receives this signal, it generates a corresponding alarm indication signal.
2. Grounding alarm indication: The grounding sensor detects the zero sequence current of the line during operation. When a grounding fault occurs in the line and the grounding fault current reaches or exceeds the alarm current setting value, the grounding sensor sends an alarm signal, which is transmitted to the host through optical fiber. After the host receives this signal, it generates a corresponding alarm indication signal.
3. Automatic reset: When the indicator sends an alarm signal, if there is no manual reset, the indicator will automatically reset within the set reset time.
4. Manual reset: When the indicator generates an alarm, it can be reset by triggering the "Reset/Test" button on the indicator host panel to release the alarm.
5. Testing: The indicator can perform self inspection of its working performance. Test by pressing and holding the "Reset/Test" button on the host panel for 1.5 seconds.

4�� Installation steps for SEK-F panel fault indicator:
1. The host of the indicator is installed on the front panel of the distribution cabinet;
2. Installation of short-circuit sensors;
The short-circuit sensor must be installed on the single-phase branch of the cable, and can be directly installed on the tested cable and fastened to prevent sliding and detachment.
3. Installation of grounding sensor:
When installing the grounding sensor, attention should be paid to surrounding the three wires of the cable. The grounding wire of the cable must be threaded back through the sensor and fastened to prevent sliding and detachment.
4. Connection:
The sensor and the host are connected by fiber optic cables. During installation, the two ends of the fiber optic cable are inserted into the fiber optic connectors of the sensor and the host respectively, and the connectors are tightened to prevent the fiber optic cable from being pulled out. The specific steps are as follows:
4.1. Insert the other end of the A-phase short-circuit sensor fiber optic cable into the corresponding fiber hole A on the rear panel of the host;
4.2. Insert the other end of the B-phase short-circuit sensor fiber optic cable into the corresponding fiber hole on the back panel of the host;
4.3. Insert the other end of the C-phase short-circuit sensor fiber optic cable into the corresponding fiber hole on the rear panel of the host;
4.4. During installation, insert the other end of the grounding sensor fiber optic cable into the corresponding fiber optic hole D on the rear panel of the host
5�� Host size: length x width x height: 96 x 49 x 85mm
Host installation opening size: Length: 91 ± 0.5mm Width: 43 ± 0.5mm
6�� Operation:
1. Test: When a self-test is required, press the "Reset/Test" button on the panel and hold it for 1.5 seconds. The machine will enter self-test mode and all items on the panel will be checked
The indicator light flashes, indicating that the whole machine is working normally. The entire process will automatically end after 7 seconds, or pressing the "Reset/Test" button again can end the self-test process and restore normal status.
2. Clear alarm: When a fault occurs in the circuit, the indicator generates an alarm signal. After the fault is resolved, the alarm should be cleared. The alarm can be released by triggering the "Reset/Test" button on the indicator host panel. If there is no manual reset, the indicator can automatically reset after the set time (6, 12, 24, 48 hours).
7�� Set reset time:
There are four types of indicator alarm status clearing time: 6h, 12h, 24h, 48h. When adjusting the reset time, the front panel of the host needs to be turned on, and the dip switch needs to be adjusted. When the first position of the switch is set to NO and the other three groups are set to OFF, the reset time is 6 hours, and so on. The factory setting value is 12 hours.

8�� Technical parameters
1. Short circuit current alarm: �� 150A with an error of ± 10%; The factory setting is 800A, with a short circuit delay of 60mS
2. Grounding current alarm: 3A~200A error ± 10%, factory set to 10A, grounding delay 40mS
3. Working power supply: ER14505 3.6V lithium battery (with a service life of not less than 5 years)
4. Standby current of the whole machine: �� 5 �� A
5. Automatic reset time: can be set as needed
6. Indicator protection level: host IP40; Sensor IP65
7. Maximum withstand current of short-circuit current sensor: 20KA 4S
8. Working environment: -35 �� to+65 ��; Relative temperature: �� 95%; Waterproof, acid resistant, salt spray resistant
9. Scope of use: In systems below 20kV level

[fault indicator]EKL2 cable fault indicator

2026-6-13 21:21:30

Product Introduction:
The EKL2 cable fault indicator is a device installed in box transformers, cable branch boxes, and ring main units to indicate cable fault branches. A device used to indicate the flow of fault current. Once a short circuit fault occurs in the circuit, the line patrol personnel can use the flashing alarm display on the indicator to quickly determine the fault section, branch, and fault point. Completely changing the outdated practice of blind line inspection, segmented closing and trial power transmission to find faults in the past, greatly improving work efficiency, effectively shortening power outage time, and enhancing power supply reliability and economic benefits.

1�� Cable line short circuit fault indicator
Short circuit fault criterion
(1) 1t �� 600A, 1t is the starting value of sudden variable current
(2) �� 1 �� 0.510 �� 1 current change rate 10 is the line current before the short circuit
(2) 1=0 1 is the current after a line fault
(4) 0.02S �� T �� 2S �� T is the sudden change time of current

2�� Cable line grounding fault indicator
Short circuit fault criterion
When detecting faults, the zero sequence current changes by more than 20A

3�� Cable line grounding short circuit fault indicator
Cable line grounding short circuit fault indicator, each set comes standard with two short circuit indicators and one ground indicator. The short circuit indicator detects short circuit faults, while the ground indicator detects ground faults. When used together, the two can detect both ground and short circuit faults.

4�� Technical parameters of EKL2 cable fault indicator
Short circuit action current �� 20A (error ± 10 �G, adjustable according to demand)
Short circuit response time: 0.02s �� T �� 4S
Working environment range: -40 �� -+85 ��
Working power supply: Equipped with a built-in 2000mAh lithium battery, with a lifespan of 8-10 years and a voltage of 2V
Automatic reset time: 12 hours (optional, users can confirm at the time of ordering)
Easy loading and unloading process: requires specialized installation tools with live loading and unloading indicators.
Line range: Cable diameter (with outer sheath) �� 40mm

[fault indicator]GY-2PJ,GY-2PD ground short circuit fault indicator for GY-2PJ,GY-2PD( cable

2026-6-13 19:55:28

GY-2PJ, GY-2PD (cable) ground short circuit fault indicator

[fault indicator]GY-1PD,GY-1PE series overhead (grounded) short circuit fault indicator

2026-6-13 19:55:19

GY-1P series overhead (grounded) short circuit fault indicator

[fault indicator]AutoRANGERTM Overhead line fault indicator

2026-6-13 19:49:40

The AutorANGERTM overhead line fault indicator is easy to install and can quickly help maintenance personnel find the faulty line, thereby reducing fault detection time by more than 50% and greatly reducing losses caused by faults in power and industrial systems.

Characteristics and advantages
By automatically adjusting the action threshold, it is possible to reduce manpower, inventory, and improper application.
Applied in any overhead line, it can automatically adapt to the system situation.
It can distinguish between instantaneous faults and permanent faults, and tracks and records automatically eliminated faults.
The closing impact load braking function can be used in conjunction with automatic reclosing.
Intelligent and adaptive signal light brightness is adjusted according to natural light.
Adopting the best battery energy-saving technology in the industry, the light flashes continuously for more than 2500 hours.
The patented tilt descent braking function can prevent false indication after the circuit breaker is disconnected.
Quick and easy installation, using an insulated rod without the need for additional clamps or bolts, and maintenance free.

Application and Troubleshooting
Applied to overhead power lines
Instantaneous faults provide an eight hour fault indication, allowing line personnel to troubleshoot the faulty section of the line.
Investigate the lines that automatically clear faults and the lines that successfully reclose after tripping to improve the reliability of power supply.

Install and run
The AutorANGERTM fault indicator can be easily installed on overhead conductors through insulating rods for single-phase or three-phase applications. The fault indicator is equipped with a highly integrated microprocessor that continuously samples the load current in the system and automatically adjusts the threshold based on the sampled current value.
Instantaneous and permanent fault indication
After the fault occurs, the fault indicator flashes a red light to indicate a permanent fault. Subsequently, the fault indicator enters a two minute latch mode, allowing for reclosing and switching actions. Two minutes later, AutorANGERTM will detect the system voltage and load current to determine whether the fault is transient or permanent. If it is an instantaneous fault, the system voltage and system load current will reset. Otherwise, the red light indicating a permanent fault will display for 4 or 8 hours based on the current before the fault.
Day and Night Modes
Built in AutorAngelTM fault indicator with photoelectric sensor to detect natural light conditions. In daytime mode, the lights facing forward on both sides flash at maximum brightness to indicate a permanent fault. In night mode, the brightness of these two lights is reduced to save energy (as shown in the picture). In this mode, a set of built-in lights simultaneously illuminate the transparent housing of the entire indicator, ensuring visibility at a distance of over 1000 inches from the indicator and adapting to 360 degree angles. The pulse adjustment circuit with flashing lights optimizes brightness and battery life.

Technical indicators
Fault detection range: 50A to 1200A
Voltage applicable range: 4160V to 69kV
Maximum fault current: 25kA for 10 consecutive cycles
Temperature range: -40 �� to 85 ��
Action response time: 24ms
Installation requirements for wires: diameter between 0.3 and 1.50 feet
Flashing reset time: 8 hours when the load current is between 50 and 100A; When the load current is between 200 and 1200A, 4 hours
Battery: 3.6V, 8.5Ah high-energy lithium battery, designed for a lifespan of 15 years
Flashing time: Over 2500 hours (650 4-hour flashing faults) Weight: 1.27 pounds (575 grams)

quality assurance
Designed according to IEEE-495 standard, with an eight year quality assurance

AutorANGERTM overhead line fault indicator

[fault indicator]DS-2DJ Cable grounding type fault indicator

2026-6-13 19:49:31

The DS-2DJ cable grounding fault indicator samples the first half wave of the capacitive current at the moment of grounding and the first half wave of the voltage at the moment of grounding, compares their phases, and when the capacitive current at the moment of sampling grounding suddenly changes and exceeds a certain value, and is the same as the first half wave of the voltage at the moment of grounding, and the conductor to ground voltage decreases, it is judged that the line has been grounded. Otherwise, the line has not been grounded.

DS-2DJ cable grounding fault indicator

[fault indicator]Cable type short circuit fault indicator (photoelectric display)

2026-6-13 19:49:22

DS-2DG short circuit fault photoelectric indicator, mainly used on ring main units and box transformers, with small size and easy installation.

When a short circuit fault occurs in the circuit, the LEO red light immediately lights up to indicate the fault.

Functional Features
The adjacent anti-interference ability is less than 10cm
It has a self checking function to ensure that the fault indicator is working properly
The photosensitive switch is safe and convenient to use

Installation method of DS-2DG cable type short circuit fault indicator (photoelectric display)

Remove the U-shaped hoop, thread the cable through the hoop, install the hoop, and tighten the bolts to complete the installation.
Note: The functional benefits, technical indicators, and working principle are the same as DS-2DX

[fault indicator]DS-2DX Cable type short circuit fault indicator (flip over display)

2026-6-13 19:49:13

DS-2DX cable type short circuit fault indicator (flip over display) The working principle of the cable type short circuit DS-2DX is the same as that of the overhead type short circuit DS-1DX. The overhead type is used for overhead lines (on bare and insulated wires), while the cable type is used for cable lines such as ring main units, switchgear, and box type transformers. When a short circuit occurs in the circuit, the flipping sign displays in red.
Installation method

Open the back spring and clip the indicator onto the cable to use.

Note: The functional benefits, technical indicators, and working principle are the same as DS-1DX

[fault indicator]DS-JDG Multi functional (four in one) intelligent line fault indicator

2026-6-13 19:49:04

DS-JDG has the same appearance, features, functions, applications, and technical specifications as DS-JDX. They have the same internal structure, but DS-JDG is equipped with a night time luminous device.

Overview

DS-JDG multifunctional (four in one) intelligent line fault indicator: In response to feedback from a large number of domestic customers, it is necessary to wear a power strip to see the fault flipping effect at night, and to find the fault point one by one, the light irradiation must be carried out. The visual distance is short, and the speed of fault searching at night is relatively slow. Therefore, our company has added a very fast and intuitive night searching light emitting device to the original two in one product to meet customer requirements, namely the DS-JDG series that lights up at night during the day flipping.

working principle
The principle of grounding short circuit fault is the same as that of the two in one, and three phototubes and high brightness light-emitting tubes have been added to the original two in one fault indicator. When a line fault occurs during the day, the indicator will flip over to display. When it gets dark at night, the resistance of the photoelectric tube increases, so the microcontroller is turned on, the flip card is reset, and at the same time, the light-emitting tube is turned on to work. When dawn broke, due to the indicator not having reached the scheduled reset time, the resistance of the photoelectric tube received light decreased, and the microcontroller reset, cutting off the operation of the light-emitting tube and turning on the flipping mechanism, thus restoring the flipping indicator.

Scope of application
At the middle section and branch entrance of the long line, the fault section and branch of the line can be indicated.
At the exit of the substation, it can be determined whether the fault is caused by the user.
At the user's transformer inlet, it can be determined whether the fault is caused by the user's fault.
At the connection between cables and overhead lines, it is possible to distinguish whether the fault is in the cable section

[fault indicator]DS-1DX Overhead intelligent short circuit fault indicator

2026-6-13 19:48:56

DS-1DX overhead intelligent short circuit fault indicator is made of aviation materials with high strength and perspective in one step, and processed by nanotechnology. It has better perspective, anti pollution, anti-aging and maintenance free
Protect and have a long service life.
High performance lithium batteries have a lifespan of over 8 years.
A circuit board composed of imported components such as dedicated chips and microcontrollers.
Shell made of aviation and nanomaterials
Nickel plated and highly magnetic. A card wire structure that can be installed with electricity
Using red fluorescent paint, it has strong visual appeal and can clearly indicate under nighttime light. It also has a display rotation that does not fade under long-term outdoor ultraviolet irradiation

Function and benefits
Quickly identify the faulty line and point, and reduce the area of power outage;
Shorten troubleshooting time, improve electricity sales and power supply reliability;
Accurately indicating instantaneous faults is beneficial for eliminating power supply hazards;
Provided technical means for locating hidden permanent fault points;
Shortening the search time for fault points and reducing the labor intensity of line patrol personnel;
Define the fault responsibility area and clarify the responsible person;
To avoid the impact of traditional multiple line pulling and closing patrols on power equipment;

Technical specifications of DS-1DX overhead intelligent short-circuit fault indicator

Applicable voltage level: U �� 6KV
Action reset time: 6, 12, 24, 36 hours optional
Applicable wire current: I �� 600A
Operating environment temperature: -35 �� T ��+65
Applicable wire diameter: 16mm2 �� d �� 240mm2
Action frequency: �� 5000 times
Action response time: 0.06S �� t �� 3S
Static power consumption: �� 10 �� W

Principle of operation
Principle of short circuit detection: Based on the phenomenon of short circuit, the current undergoes a sudden positive change at the moment of short circuit, and the protection action is based on power outage.

Schematic diagram of fault indication used to determine short circuit:

If the indicators 2, 5, and 8 of phase B on line 2 and the indicators 3, 6, and 9 of phase C on line 2 turn red while the indicators 11 and 12 remain white, it can be determined that a short circuit fault has occurred at point D

DS-1DX Overhead Intelligent Short Circuit Fault Indicator

[fault indicator]Grounding and short circuit fault indicator

2026-6-13 19:48:47

DS-JD grounding and short-circuit fault indicator is a detection device designed for automatic monitoring of power supply systems in the power grid, suitable for high-voltage switchgear and power distribution systems below 35KV (inclusive). Mainly used for detecting, indicating, transmitting fault signals, and sending remote indication alarms, it also has memory and recovery functions. Enable maintenance personnel to accurately identify the interval where faults occur, improve their ability to analyze faults, quickly eliminate faults, narrow down power outage areas, and shorten power outage times. It plays an important role in ensuring the safe operation of the power grid and improving the quality of power supply. Mainly installed in the feed out circuit and power distribution system of electrical equipment such as high-voltage switchgear, ring main unit, cable distribution box, etc.

Main characteristics of DS-JD grounding and short circuit fault indicator

Strong anti-interference ability: The sensor and the detection object are always in an equipotential state, without any interference from surrounding electromagnetic fields, and there is no insulation breakdown problem. Optocoupler isolation and fiber/cable transmission ensure safe, accurate, reliable, and stable signal detection.
Using microcontroller chips: Due to occasional faults, the microcontroller chip and related circuits enter a sleep energy-saving state under normal circumstances; Once an interface fault signal occurs, immediately wake up the microcontroller chip and related circuits, start the setting program and start timing, causing the LED to work at a certain frequency and duty cycle, while the relay acts and remotely alarms; After running to the set reset time or pressing the reset button, the LED stops working, the relay resets, and the microcontroller chip and related circuits re-enter the sleep energy-saving state.
The sensor is passive: it directly detects signals online and uses the electromagnetic field changes generated by fault currents to generate pulse signals to excite the circuit, without affecting the normal operation of the power grid.
Lithium battery power supply: No external power supply required, stable and reliable power supply quality. Powered by a lithium battery, the service life can reach at least 8 years

Technical specifications for DS-JD grounding and short-circuit fault indicator
Short circuit fault sensor action current: 600A, 1000A (customizable)
Ground fault sensor operating current: 5A, 25A, 50A, 100A (customizable)
Display instrument working power supply: 3.6V
Export relay: 120VAC 1A, 30VDC 2A
Display instrument automatic reset time: 2h~40h
Transmission optical cable: 10m

Dimensions and wiring diagram

Installation and usage instructions
When installing the grounding fault sensor, unscrew the fastening screws at both ends of the steel strip to release it, then insert the three-phase cable into it. Tighten the fastening screws in the appropriate position, tighten the nylon cable tie to prevent it from loosening, and then connect the cable to the grounding sensor terminal on the back panel of the display instrument.
When installing the short-circuit fault sensor, unscrew the screws at both ends of the fastening ring, wrap the cable around it, tighten the screws on the fastening ring, and turn the adjusting screw to fix it on the cable. Then connect one end of the optical cable to the optical cable interface, tighten the screw, and connect the other end of the optical cable to the short-circuit interface on the back panel of the display instrument. When connecting
Pay attention to the phase.
After installation, press the detection/reset button for self check. The indicator light flashes, indicating that the instrument is working properly. Then press the button again, and the indicator light stops flashing, indicating that it has been put into operation.

[fault indicator]DS-JDX Ground short circuit two in one intelligent circuit fault indicator

2026-6-13 19:48:38

DS-JDX and DS-1DX have the same appearance, features, functions, applications, and technical specifications, but their internal structures are different and their working principles are also different.
There is only one core intelligent short circuit detection chip in DS-1DX, while DS-JDX has a two in one intelligent detection chip for detecting short circuits and ground faults.

Performance characteristics

Fault indication: During normal operation, the window is displayed in white; When a short circuit or grounding fault occurs, the window will display in red.
Online operation: directly installed on the line, maintenance free.
Strong anti-interference: The signal is not affected by lines, excitation inrush current, high-order harmonics, current fluctuations, or cable distributed capacitance bypass.
Automatic reset: After flipping the card, it will automatically reset according to the set time. The DS-2DX cable type short circuit indicator can be manually reset.
Live loading and unloading: Live loading and unloading are extremely simple and do not affect the operation of the line.

Working principle of DS-JDX grounding short circuit two in one intelligent circuit fault indicator
The principle of short-circuit fault in the two in one grounding short-circuit is the same as that of DS-1DX
Grounding detection principle: Sample the first half wave of capacitive current at the moment of grounding and the first half wave of voltage at the moment of grounding, compare their phases. When the capacitive current at the moment of sampling grounding suddenly changes and exceeds a certain value, and is in phase with the first half wave of voltage at the moment of grounding, and the wire to ground voltage decreases, it is judged that the line has been grounded. Otherwise, the line has not been grounded. Schematic diagram of fault indication used to determine grounding:

If the indicators of phase 3, 6, and 9 on line 2 turn red while indicator 12 remains white, it can be determined that point D has malfunctioned

Application scope of DS-JDX grounding short circuit two in one intelligent circuit fault indicator

Installed at the middle section and branch entrance of long lines, it can indicate the faulty section and branch of the line.
Installed at the exit of the substation, it can be determined whether the fault is caused by the user.
Installed at the user's transformer inlet, it can be determined whether the fault is caused by the user.
Installed at the connection between cables and overhead lines, it can distinguish whether the fault is in the cable section

Installation tools
The installation tools for DS-1DX and DS-JDX are shown in the bottom right corner of the figure. The specific installation method only requires placing an insulating rod at the bottom of the installation tool,
Unscrew the top bolt of the indicator and place it in the installation tool, then clip the indicator into the cable to complete the installation

DS-JDX Ground Short Circuit 2-in-1 Intelligent Circuit Fault Indicator

[fault indicator]EKL-3.1 type fault indicator

2026-6-13 19:47:10

The EKL-3.1 fault indicator is an assembled component Used for detecting ground faults and short circuit faults It operates in a star shaped network with only one current input port and medium voltage The minimum value of grounding fault current must be 10A (resistance grounding or fixed grounding grid) The EKL-3.1 fault indicator must be installed on each branch of the network to indicate
a) Short circuit fault detection: Each of the three wires is indicated by an indicator light
b) Ground fault detection: There is a total of one indicator light
c) Remote signal: Remote signals can be used to indicate short circuits and ground faults indiscriminately, or remote signals can be used to differentiate between ground faults
Indicate short circuit and ground fault

Design the composition of grounding and short-circuit fault indicators: 3 short-circuit sensors, 1 grounding fault sensor, 1 reading device, and connecting wire or fiber optic cable reading device are installed in a plastic housing with devices for measuring current and setting fault indication time limits
A ground fault is indicated by a flashing indicator light, while a short circuit fault is indicated by one indicator light on each of the three wires The indicator shell has an indicator function detection key and an indicator status restoration key. The sensor is also equipped with a plastic casing, and the coil inside the casing is used to sense the current caused by short circuit or grounding. Sensors can be connected to wires or optical cables according to assembly requirements. The fully cast plastic casing meets the IP65 protection standard
Zero voltage data transmission between short-circuit/grounding sensors and reading devices can be achieved through optical cables. The optical cable is made of PMMA material and has a maximum length of 10 meters
After setting the fault current value, once the current value measured by the coil in the sensor is greater than the set fault value, the real-time current pulse is transmitted to the indicator and read, and the indicator light will also send a fault signal to the outside accordingly There is also a minimum pulse delay setting device inside the indicator, which is used to measure the delay of the current pulse captured by the sensor and compare it with the set value, thereby avoiding erroneous indications caused by the instantaneous peak current being too high when the power grid is energized or in other situations Each device can set up to four minimum pulse delays. The specific setting values have been set according to the buyer's wishes before leaving the factory Device reset 1. It can be controlled by a timer, and after the set indication duration ends, it will automatically return to the non indication state. Each device can be set with four indicator durations, ranging from 0.5 hours to 40 hours. 2. Manually turn back the button. 3. The power grid will automatically return to its original position after being powered on
The installation indicator is installed outside the high voltage zone. Short circuit sensors can be installed on high-voltage wires with or without shielding. The ground fault sensor must be installed around three wire cores to ensure that the total current of the three wires is measured When installing the sensor, its frame can be opened The short-circuit sensor is connected to the indicator through an optical cable, and the grounding sensor is connected through a wire
Overview of Technical Data

Short circuit fault current definition value setting: 100-1500 A
Grounding fault current definition value setting: 100--1500 A10 A --200 A*
Error range:+/-10%
Working environment temperature: -18 degrees Celsius to+60 degrees Celsius

indicator
Indication time setting: Minimum pulse delay: between 0.5 hours and 40 hours (4 values) between 20 milliseconds and 500 milliseconds (4 values)
Indicator required current: standby state requires 5-10 A, startup indicator requires 60A

Power indicator battery requirements: -230V AC (rechargeable batteries are also available) -9V to 110V DC - lithium battery

Remote indication: Shell size: Grounding and short circuit: Maximum 230V AC/50 to 150 watts

Surface installation of indicator housing 76x140x42mm (length, height, width)
Embedded installation 96x48x63mm (length, height, width)
Sensor housing short circuit 38x38x26mm (length, height, width) grounded 38x38x26mm (length, height, width)

EKL-3.1 type fault indicator

[fault indicator]EKL1 type fault indicator

2026-6-13 19:47:01

Overview of EKL1 Fault Indicator:

Short circuit and ground fault indicator is a device used to detect short circuit 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 next and distribution network systems, the higher-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.
The EKL series grounding and short-circuit fault display includes models: EKL1, EKL2, EKL3, EKL4.

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 current activation alarm setting value (which can be set before leaving the factory according to user requirements), the short circuit sensor sends an alarm signal. After the host receives this signal through optical fiber, it generates an alarm indication signal (the indicator light flashes rapidly).
2. 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 operation.

Main technical parameters of EKL1 fault indicator:
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
Display box size: 96 (W) × 49 (H) × 88 (D) mm
Display panel opening size: 92 (W) × 44 (H) mm
Sensor size: 40 (W) × 40 (H) × 27 (D) mm

Protection level: IP40 display, IP65 sensor

[fault indicator]Cable type short circuit fault indicator

2026-6-13 19:46:51

ESI-2S cable type short circuit fault indicator features:

1. Fault: When a short circuit fault occurs in the tested circuit, the fault indicator light will flash red for 12 hours and then automatically reset and stop; After the fault indication state ends, it automatically enters the monitoring indication state;
2. Self check function: When the fault indicator is in normal monitoring state, the status indicator light will flash green light twice every 30 seconds, indicating that the IMS-S2 fault indicator is in normal monitoring state; When the fault indicator is low on battery, the status indicator light flashes yellow once every 10 seconds to prompt the user to replace it;
3. Automatic reset: Automatic delay (time can be set) reset, maintenance free;
4. High reliability: Built in high-sensitivity sensor with high indication accuracy;
5. Online operation: directly installed on the cable, can run for a long time, maintenance free;
6. Fireproof: Made of refractory materials, it will not become a ignition point in the ring main unit and branch box;

Installation diagram of ESI-2S cable type short circuit fault indicator:

ESI-2S cable type short circuit fault indicator

[fault indicator]ALPHA/M type fault indicator

2026-6-13 19:39:27

Description:
The ALPHA/E type short circuit fault indicator unit mainly consists of an electronic circuit, a micro motor with a rotating handle, and three rectangular red flip cards The operating mode of the action current and SCADA contacts can be selected by jumper This short-circuit fault indicator can be used to test the functionality of the entire circuit at any time by rotating the handle to the right
Technical Specifications:
Calibration pulse: 100ms
Action current: 400A, 600A, 800A, 1000A, on-site jumper selection
Accuracy: ± 15%

Reset: Manual
SCADA contacts: selection of jumper wires between normally open and normally closed contacts or fixed tripping contacts,
Contact parameters: 250V/3A/30W/maximum 60VA
Shell: Plug in polycarbonate shell, compliant with standard ICE61554
Attachment: 4 fixed spring plates
Installation size: The recommended opening size for the switchgear panel is (92+0.8) × (45+0.6) mm
Installation position: Horizontal external dimensions: 96 × 48 × 97MM (width × height × depth)
Weight: Approximately 1KG (including CT)
Sensor: Multi layer silicon steel sheet transformer with coil

[fault indicator]SFI-1 type fault indicator

2026-6-13 19:39:18

Introduction to SFI-1 Fault Indicator:

The SFI-1 fault indicator is an automatic fault detection device developed and produced by Shanghai Heyu Company, which can detect short-circuit faults. After testing by the National Electric Power Equipment and Instrument Inspection and Testing Center, all technical indicators have reached an advanced level. This product is widely used for overhead use. It can accurately identify faulty lines and fault points, with stable performance, high accuracy, strong anti-interference ability, beautiful appearance, and easy installation.

Function and Features:
Fault indication: During normal operation, the window is displayed in white; When a short circuit fault occurs, the window is displayed in red.
Automatic reset: After the power supply is restored to the line, the fault indicator will automatically reset. The reset time can be selected by the customer according to the line environment, patrol length, department requirements, etc.
1. Live loading and unloading: Live loading and unloading are extremely simple and do not affect the operation of the line.
2. Provided technical means for identifying hidden fault points.
3. Quickly identify the faulty line and fault point to shorten the troubleshooting time.
4. Accurately indicating instantaneous faults is beneficial for eliminating power supply hazards.
5. Avoid the impact of traditional multiple line pulling and closing patrols on power equipment.
Detection principle:
Short circuit section: Current detection will only indicate when a short circuit occurs, the current suddenly increases, and the switch trips.
Structural characteristics:
1. A circuit board composed of the latest digital circuits, combined with imported components such as dedicated chips and microcontrollers.
2. The card wire structure is made of magnetic material and treated with nickel plating, with extremely strong magnetic conductivity and strong corrosion resistance.
3. The display part adopts red fluorescent paint, which has strong visual appeal and can clearly indicate under low light conditions at night. It also does not fade under long-term outdoor ultraviolet radiation.
4. High strength and high perspective aviation materials are used for one-time molding, and after special chemical technology treatment, the perspective is better, anti pollution and anti-aging.

[fault indicator]EKL4 type short circuit and ground fault indicator

2026-6-13 19:37:41

The EKL4 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.

Main technical parameters of EKL4 short circuit and ground fault indicator:
Short circuit fault action current: 80A-1500A
Ground fault action current: 20A-200A
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: 230VAC 1A/125VDC 1A/30VDC 2A
Dimensions (W × H × D)
Reading instrument:
Panel mounted reading instrument: 92 × 46 × 63mm
Surface mounted reading instrument: 76 × 140 × 42mm
Sensor:
Short circuit sensor: 40 × 43 × 26mm
Ground fault sensor: 40 × 43 × 26mm
The following are the improvements or advantages of EKL4 compared to EKL3:
1. Composition of short circuit and ground fault indicator:
Three short-circuit fault sensors
A ground fault sensor
A reading instrument
Four optical cables
The prominent feature of EKL4 short circuit and ground fault indicator is that all connections between sensors and reading instruments are made through optical cables. This is an advantage as the sensor can be directly installed in unshielded cable areas. The result is that shielding may not necessarily pass through the frame, but can independently pass through the steel strip. This method provides common applications for short circuits and ground faults.
2. The adjustment of operating current, reset time, and battery replacement can all be operated directly without opening the box.

[fault indicator]EKL3 type short circuit and ground fault indicator

2026-6-13 19:37:32

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.