Intelligent Underground Cable Fault Indicators Current Automatically For Short Circuit 

The TYHD-3 cable indicator is suitable for the cable 35kV system (including bellow 35kV system).It can only judge short-circuit, without locally indicating function. When short-circuit happened in cable,It can help line finder find the fault quickly .shorten power-off duration,improve the reliability of power supply,The picture of product is below:

Working principle:

Using clip-on line structure of fault detector as sensor of measuring load current. The intelligent controller control as the core with little power consumption ,When a circuit has a short circuit fault,The fault detector automatically recognize fault current characteristics to judge intelligently. In the meantime. the action signal will be transmitted to the panel indicator installed locally by fiber and locally indicating,then the panel indicator send the wireless signal to DTU to realize the remote transmission of fault signal.

Installing methods:

Clip the indicator on the line as shown in the pictures1.2.3, rotate the screws clockwise to fix it and tighten the fault detector, connect the fault detector and panel indicator through short-distance plastics optical fiber; make sure to insert the optical fiber to the other end and tighten the nut. The length of the optical fiber should be less than 10m,The shorter the distance ,the higher the reliability .optical fiber cross-section is cut flat with a paper cutter, which is beneficial to the transmission of fiber signal

After the test completely cover the rubber cover,in order to avoid abnormal indicator accused by long-term light leakage

Function:

1) Install and disassemble easily, be suitable for Cable lines with an external diameter of less than 40 mm.

2 ) detect short circuit

3 ) epoxy resin pouring,whole-sealed structure, suitable to run outdoors for a long time.

4) The line load current can be detected automatically, no need to configure alarm parameters.

5) Inhibiting the switch-off surge current automatically.

6) Fiber data communication:

Indicating locally the fault alarm signal transmitting from fault indicator to panel indicator(if no panel indicator, this function is not available).

7) Taking electricity from cable current, equipped with built-in storage lithium battery, life is more than 15 years.

There is type test report for it, test items as following:

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.