TYHD-AI3 smart grounded and short circuit fault passage indicator is installed on the overhead power lines, is to detect the grounded and short circuit fault for overhead line. It will alarm during the day and flash during night to show the fault.According to the alarm information , the operator can locate the fault area quickly and find out the point of fault, which supply the best solution for the difficulty in finding fault area. This device can improve work efficiency, reduce power outage time and power restoration quickly.

When short-circuit happen in line, the fault current passage is from fault point to substation,all indicators which the fault current flows through will sense the current sudden changes.with the switch tripped at exit of substation, the line will be in status of loss of voltage and current. Short-circuit adopts method of load current self-adaption intelligent sudden changing way.

basic function

• Fault indication: The window appears white when line running normally;when short-circuit and earth fault happen, the window will appear red and flashlight at meantime.
• Power taking function:Taking power from line through magnetic ring and not consume stand-by battery, extend indicator life, the stand-by battery can be replaced.
• running online.installed on overhead line directly,free-maintenance.
• Good adaptability: The accuracy of fault detection will not be affected by the load current changing value
• Strong anti-disturbance capacity:Signal is not affected by line,magnetizing rush current,ultra-harmonics and current wave,especially the earthed capacitance current under condition of mixed lines
• Intelligent reset: permanent fault:fault is cleared and power is restored, fault passage indicator will reset for short time transient fault:Line fault happened and tripped then re-close successfully, fault passage indicator will reset by setting time. Install and uninstall with power:can be installed and uninstalled when line is on power,not affect line running status.
• There is type test report for it,test items as following:

• Type Test Items

  1. appearance and structure 2.function 3. electrical device performance 4.low temperature performance 5.high temperature performance 6.alternating temperature humidity7.vibrationendurance 8.incline drop test 9. electrical device life 10. static electricity and elecro-discharge immunity test 11.radio frequency electromagnetic field radiated immunity test 12.surge impact immunity test 13. power frequency magnetic field immunity test. 14. Adjacent interference test 15.short-circuit withstand impact test 16. fire hazard test 17. power consumption test 18. protection grade test 19. gripping strength test of grip structure.

Beijing TIANYIHONGDA Science & Technology Development Co., LTD is located in Lize Business Circle area, a prosperous business area in the center of Beijing City, China. is a high and advanced technology enterprise which is professionally engaged in research, production, sales and service of advanced smart monitoring technology products. We have great professional research team and techniques service team with rich working experience in the field of smart monitoring technology, cooperating with many famous Universities and Science Research Institutions on Smart Grid Automation, Smart Sensors and Wireless Communication and developing widespread market.

Our company has a great achievement in the development of Smart Grid, we by ourselves researched out the whole set of power distribution automation products such as DTU, FTU, RTU and so on. The central products and technology obtain national patents and certificate issued by relevant authoritative institution. The Fault Passage Indicators and Fault Location DTU systems has been stably running nearly 820,000 sets in the big city and middle city in domestic and overseas Market. accumulation of rich techniques and practical running experience on sites, these devices not only applied in the areas of national state grid, railway, petroleum, chemistry, coal, but also widespread used in the overseas countries such as India, Vietnam, Sri Lanka, Indonesian, Iran, Brazil, South Korea, South American and so on.

Meanwhile, the company is also successfully developing products to new monitoring fields, researched out Meteorological Monitoring Equipment, Environmental Monitoring Equipment and Video Monitoring Equipment and so on. All the products got the authoritative type test report and fully carry out and implement ISO9001 Quality Management System, these equipments have been successfully sold to domestic and overseas markets and approved by our clients.

Solar Power system with remote monitoring function is also successfully entering into market and get approval by the users. we have succefully finished many projects including commercial,residential applications for on-grid and off-grid applications such as 40KW substation, 60KW substation, residential ,countryside etc.

“ Sincerity is fundamental, clients is the first” & “strict quality control, earnest service supply” are our company’s management ideal, we sincerely invite all the cooperation partners working together to supply good qualities of products and service to domestic and overseas clients, devote ourselves to electrical smart grid development and monitoring technology development.