Remotely Low Voltage Cable Fault Locator , Easily Upgraded Cable Fault Indicator 

TYHD-A12 cable earthed fault indicator is applied to cable system below 35KV, with function of zero-sequence current measurement and data transmit function, it indicates fault when earth fault happened in cable, It can help line finder find the fault quickly .shorten power-off time,improve the reliability of power supply,be convenient for users to monitor the zero-sequence load current of line on real time.

Data transmission Unit is applied in power distribution network, used for data gathering and transmission for load detection ,fault detection and location in cable.

Working principle:

Date Transmission Unit is to make photoelectric translation,process and analyze the fault signal from short-circuit fault indicator and earth fault indicator transmitted through optical fiber.then send the fault signals to master station by GSM or GPRS after analysis and processing to realize fault detection,fault location and load current measurement of power distribution network .

Function:

1)Optical fiber receiving: receive signals of fault point and load current from indicators by optical fiber network

2) GSM or GPRS sending: send device status,line load current,indicator status and fault information to master station by GSM/GPRS and make sure the fault information can be transmitted reliably

3) Power supply:power supply method is flexible. 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 to transmit fault information or shift information.

5) Remotely upgrade:device can easily be upgraded remotely

Technical parameters:

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