Fault location and repair of power lines are the core of distribution network automation. Building a strong and intelligent distribution network to improve the automation rate of distribution networks requires real and effective monitoring of power lines, as well as analysis of monitoring data. Timely locate and display the location of faults in power lines, and guide operation and maintenance personnel to quickly troubleshoot and restore power supply through various communication methods such as SMS or WeChat. Provide guarantees and intelligent decision-making for the safe and stable operation of power lines.

Our company has conducted in-depth research and long-term practice on the principle of line monitoring, and developed a domestically leading fault indicator. This product monitors the operation status of overhead power lines online, including grounding faults, short-circuit faults, and line loads, and sends the collected characteristic information to the system main station. The system software performs data analysis, alarm display, fault statistics retrieval and query to obtain line operation data and fault information, realizing the functions of fast and accurate positioning of short circuit and grounding faults and load monitoring, providing a basis for load allocation of the line, accelerating fault elimination speed, shortening power outage time, reducing power outage losses, and improving the automation and informatization level of operations.

The fault indicator uses card wires and coils to induce overhead line current and electric field signals, and collects and processes these signals through low-power microcontrollers to complete line load current calculation, short circuit, and grounding (optional) fault detection. It also uses a built-in remote low-power small wireless module to achieve local wireless networking or directly collect fault indicator information from communication terminals and upload it to the monitoring center.

Our fault indicators include external signal fault indicators and transient waveform fault indicators.

·External signal type fault indicator

Local communication function, fault indicators on the line, and remote transmission transformer monitoring terminal network communication serve as relays for each other, expanding communication distance.

Short circuit criterion: adaptive algorithm, automatically tracks load current without setting action parameters; The overcurrent cutoff method is used to set overcurrent and speed determination values in conjunction with the substation setting parameters.

Grounding criterion: Passive method is used to detect grounding faults, while active injection method is compatible to detect grounding faults, ensuring accurate grounding fault detection.

Live installation and disassembly, suitable for overhead wires with an outer diameter of 5-28mm.

Epoxy casting, fully sealed structure, can operate outdoors for a long time.

Detect phase to phase short circuit faults, grounding, insulation degradation, power outages, etc.

Real time monitoring of line load current.

Automatic reset, self check and self recovery function; Remote control reset.

Automatically suppress surge current during closing.

Built in lithium battery, can be powered by wire CT, with a service life of over 8 years.

Fall resistance: The product can be freely dropped from a height of 1 meter onto a concrete floor without damage.

·Transient waveform fault indicator

Innovative low current (5A) self tapping technology, real-time online stable operation, through the application of new materials and innovative power technology, can continuously tap power within the range of 0-600A line current

Advanced electronic current transformer, with a measurement accuracy of ± 1% for line current, can detect changes in the amplitude of the line to ground electric field with high sensitivity of ± 0.5%, and accurately identify the working conditions of the line

Intelligent triggering of line current, high-speed recording of ground electric field (4kHz), capturing transient waveform signals of small current grounding faults

High precision (± 100 μ s) wireless time synchronization enables synchronous acquisition of three-phase current and ground electric field waveforms

Accurately identify line operating conditions and support current waveform recording

Real time online, the status of the line can be controlled at any time

Maintenance free design, capable of remote wireless upgrade

Insulated operating rods can be used for live installation and disassembly, which is safe and convenient

Installing equipment at suspected grounding or short-circuit fault locations on overhead lines with a neutral point of 35KV or below that is grounded through a small resistor, grounded through an arc suppression coil, or not grounded, can quickly locate the location of the fault.