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|Remotely Upgrade:||Device Can Easily Be Upgraded Remotely||Wireless Receive:||Receive Fault Point Signal From Panel Indicator By Wireless|
|Power Supply Way:||PT Supply Or Two Road Of CT Supply||Function:||Detect Earthed Fault|
underground electrical fault locator
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.
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.
1.wireless receive: receive fault point signal from panel indicator by wireless
2.GSM or GPRS transmission: send status information, fault information to master station by GSM or GPRS.
3. Power supply way:PT supply or two road of CT supply, if primary current is above 10A,it can work normally.
4. communication protocol:IEC870－5－101 or IEC870－5－104
5. Remotely upgrade:device can easily be upgraded remotely
TYHD-2A cable earthed fault indicator is applied to cable system below 35KV, with function of zero-sequence earthed fault detection and fault signal remote transmission function. the panel indicator displays and remotely transmitted the detected fault signal from earthed fault indicator transmitted by optical fiber,when earth fault happened in cable. It can help line finder find the fault location quickly .shorten power-off time,improve the reliability of power supply.
Using specially designed open zero-sequence CT as sensor of measuring zero-sequence current, micro-power consumption intelligent controlling chip is as core. When earth fault happen, earthed detector will automatically distinguish fault current characteristics to judge earth fault intelligently, then transmit the data to panel indicator to display by optical fiber, and the panel indicator will send wireless signal to DTU to realize the remote transmitting for fault signal.
Main technical performance and parameters:
working power: 3.6V/2Ah lithium battery is equipped for supply；
static power consumption:3.6V power supply＜5uA
long endurance current:500A
short endurance current:2000A/2S
optical fiber communication distance:10m
optical fiber data rate:9600bps
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.|