This manual describes the fault indicator tester designed and manufactured by the Qingdao great electric equipment Co., Ltd., designed and developed according to the professional inspection outline of the power distribution line fault indicator of the national grid in 2017. The fault indicator tester is a high reliable multi closed loop control technology with high output power. Precision, high output power resolution, high stability and reliability, high conversion efficiency, low power grid pollution, constant current and constant voltage. Using SIEMENS PLC, Taiwan polyvinyl 10 inch LCD screen, software is developed independently, without input parameters, automatic test data.

This product control system provides perfect protection and necessary safety measures for operators, power supply equipment and power supply itself. The key circuit and the main electrical parameters are monitored in real time. Once the failure occurs, the power is shut off immediately. The risk of the user, the electrical equipment and the power supply itself is reduced to a minimum.

L high frequency SPWM hardware adjustment technology, fast response and stable output.

L high power MOS/IGBT driver, reliable operation, strong overload capacity;

L is suitable for various loads such as resistance, sensibility and rectification.

L has the protection function of overheat, overcurrent and short circuit.

With parameter memory function and shortcut key operation mode, it is simple and convenient to use.

Using SIEMENS PLC, Taiwan polyvinyl 7 inch LCD screen, software is developed independently, without input parameters, automatic test data.

3.1 the basic requirements of the working power supply are AC 380V + 10%, and the capacity is not higher than 40kVA.

3.2 basic current output basic requirements

3.2.1 analog current amplitude (each phase): greater than 1000A.

3.2.2 output accuracy: less than 0.2%.

3.2.3 output stability: less than 0.5%.

3.3 basic voltage output requirements

3.3.1 analog voltage amplitude (each phase): greater than 10kV.

3.3.2 output accuracy: less than 0.5%.

3.3.3 output stability: less than 0.5%.

3.4 basic requirement of acquisition precision

3.4.1 acquisition precision: less than 0.1%.

3.4.2 frequency range: 45 ~ 55Hz.

3.5 basic requirements for carrying capacity

3.5.1 analog line perimeter (per phase): greater than 3m.

3.5.2 failure indicator installation: more than 60 sets.

3.5.3 current output power (per phase): greater than 10kVA.

3.5.4 voltage output power (per phase): greater than 1kVA.

4. analogue function description

4.1 load monitoring ability detection

4.1.1 simulate the normal operation of distribution lines:

A) load current simulation, and continuously output the normal load current with a maximum value of 1000A.

B) line voltage simulation, and continuously output the line voltage up to 10kV.

4.1.2 automatic detection of distribution line fault indicator is as follows: function and performance:

A) load current acquisition function under normal operation condition of the line, including acquisition accuracy and acquisition interval.

B) voltage acquisition function, including acquisition accuracy and acquisition interval.

C) line load power supply function.

D) three phase synchronization precision detection.

Detection of 4.2 short circuit fault identification ability

Simulation of interphase short-circuit fault line current and voltage changes, automatic detection of distribution line fault indicator short-circuit fault identification function, performance:

A) short circuit fault detection.

B) fault current acquisition accuracy and start error detection.

C) automatically determine the function of fault current alarm action value according to line load variation.

D) short-circuit fault current minimum duration 40ms recognition capability.

E) transient fault and permanent fault recognition capability.

F) functions such as data communication, timing, signal reset and other functions.

Detection of 4.3 grounding fault recognition ability

4.3.1 simulates different types of grounding faults:

A) simulate the change of line current and voltage caused by metal grounding, small resistance grounding, high resistance grounding, and arc grounding fault.

B) simulate the transient process of current and voltage in different grounding systems and different types of grounding faults.

C) the transient fault current with a maximum value of 1000A can be output.

D) the phase of the fault triggering time is controllable.

4.3.2 automatic detection of distribution line fault indicator grounding fault identification function and performance:

A) detection of different types of grounding faults and detection of grounding fault recognition rate.

B) fault current acquisition accuracy and startup error detection for small resistance grounding fault.

4.4 fault recording function

Support the recording of the current and voltage waveform of Comtrade 1999 standard recording format, compare with the waveform sent by the fault indicator, and automatically output the comparison result.

4.5 anti malfunction detection

The operation conditions such as load fluctuation, large load switching, transformer unload inrush, line closing inrush, near line fault and reclosing current are used to automatically detect the anti misoperation function of distribution line fault indicator.

4.6 fault case editing and execution

A) can edit state sequence and store according to relevant standards, such as ground fault state sequence, instantaneous short circuit fault state sequence, permanent short circuit fault state sequence and so on.

B) select the corresponding state sequence or fault case according to the test request, and execute the test case automatically.

4.7 response image recognition

Support distribution line fault indicator response results automatic image acquisition, identification and upload.

Analysis and comparison of 4.8 detection results

It supports automatic analysis, comparison and calculation of test results.

4.9 the result of detection is consistent

The detection result is based on the latest relevant standards of the national Power Grid Corp and the quality control and control scheme, which is consistent with the professional inspection of the network, ensuring the professional inspection of the distribution line fault indicator, the inspection before supply and the agreement of the inspection results after the arrival of the goods.

4.10 unified deployment of detection cases

Support the unified deployment of detection cases, support network professional detection report, pre supply and post delivery inspection report integration and sharing, easy to network professional testing and different provincial companies to carry out pre supply and post inspection cases, detection methods, judgment basis, and the results of the unified sharing.

2 upgrade and extension

5.1 detection project and judgment basis update

The corresponding testing items can be configured according to the change of the testing standards, and the basis for judging the maintenance results can be updated, so as to improve the accuracy and consistency of the test results.

5.2 load capacity expansion

It can expand the carrying capacity according to the test demand, drive the longer analog coil, and has a larger detection capability.