Active Member
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[China]
Address: Room1301, Building 11, yard 88 , Sanluju Road, Fengtai District, Beijing, China
Contact name:
Beijing Tianyihongda Science & Technology Development Co., LTD |
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connecting wireless indicator for undergroud cable for information quickly and effection
Data Transmission Unit function is to receive wireless signal from panel indicator then to demodulate and decode,then send the signal to central station by GSM or GPRS.
The TYHD-A0 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 .
Working principle:
Date Transmission Unit is to transmit the fault signal from panel indicator which is transmitted from short-circuit fault indicator and earth fault indicator through optical fiber. DTU receive data wireless from panel indicator ,then send the fault signals to master station by GSM or GPRS after analysis and processing to realize fault detection and fault location of power distribution network .
Main characteristics:
Wireless receive:receive fault point information from panel indicator through wireless
GSM OR GPRS send: send status and fault information to master station,requires confirm detailed requirement before order.
Main supply: powered by two roads of powered CT, back up used each other, if primary line current is not less than 10A, back-up power will not be consumed; or PT powered.
Back-up power supply:equipped with free-maintenance 5AH lithium battery. Under condition of no power for main power source, it can keep device working 5-8 years and fault information not lost and no need to complement energy.
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
Technical parameters:
| DTU size | height×width×thickness=330mm×230mm×90mm |
| weight | <5Kg |
| Rate working voltage | PT power supply；For CT supply,primary line current is not less than 10A |
| Static power consumption | <1mW |
| wireless receive distance | ≥10m |
| Wireless frequency | 433MHz or 865-869MHZ |
| GSM module | E-GSM/GPRS 900/1800 double-frequency band |
| Lithium battery life | ≥5 years |
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. |
