Automatic Earth Fault Indicator Optical Fiber Network GSM / GPRS Sending

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 .

Main characteristics

1) GPRS real-time communication

Communicate real-time with master station by GPRS. Client also can choose mode of timing online according to power supply condition at site or GPRS flow condition .

2 )Eight roads of remote fault indication can be displayed at the same time

Equipped with cable fault indicators, with both function of remote fault indication and remote data measurement. 8 roads of cable information can be detected, and also, 8 roads of remote indication information can be displayed in LED at same time.

3 )Power supply way

There are two kinds of power supply method according to actual situation at site.

1) When there is AC power supply condition at site, use AC220V power supply and matched cable, connect device power interface to PT at site.in this way, the device can work immediately after power restore.

2) powered by two roads of powered CT, back up used each other, if primary line current is not less than10A,device can work normally.

Note: when power supply at site is not normal.the super capacitor in the device supports the DTU running normally 30 minutes in real-time status to make sure fault information upload correctly.

TYHD-A1 panel type fault indicator(be called indicator for short below) is mainly used for indicate short circuit fault and earth fault on the On/Off panel, and used for output wireless signal.

Working principle:

The principle is micro-controllers with little power consumption, micro-controllers can automatically identify fault signals from short circuit indicator and earth indicator, They can display the fault signals using LED flashing lights on the spot and output the signals by wireless.

Function:

1) Show short circuit fault and earth fault locally.

2)Self-reset ,the interval time of self-reset can be set before delivery from factory (The default is 12 hours).

3) Reset or self-test manually.

4)Set the addresses of the indicators

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