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|Function:||Indicate And Locate Short-circuit And Earth Fault For Underground Cable||Working Mode:||Wireless Signal Output .|
|Long Endurance Current:||650A||Power Supply:||Taking Electricity From Cable Current And Standby Battery|
|Designed Life:||More Than 10years||Environment Temperature:||（-40～70）℃ Maximum Daily Temperature Difference Is 25℃.|
underground power cable fault locator,
underground electric cable fault locator
Parameters can be customized by client's requirement, if require more details please contact our company.
TYHD-2 panel type fault indicator(be called indicator for short below) is mainly used for switch gears for locally indicate short circuit fault and earth fault and also provide wireless signal output . Data Transmission Unit(wireless)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.
2, canle fault indicator 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.The parameters can be customized by client's requirement. please contact rainbow2667 for skype ID.
Data Transmission Unit(wireless)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 .
Data Transmission Unit 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.
Data Transmission Unit Function
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
3, Installing methods
Method of installing:
L1 connects with A phase for signal input from optical fiber
L2 connects with B phase for signal input from optical fiber
L3 connects with C phase for signal input from optical fiber
L4 connects with Earth line for signal input from optical fiber
3.1 Fault indicate function
The lights on the L1,L2,L3,and Earth buttons will flash with a an interval of 4 seconds,if the short circuit fault or earth fault occur.This can be reset automatically according to the time delay set before delivery from the factory or manually reset by pressing button of “Reset/Test”.the status of low battery capacity of the indicator can be uploaded by wireless,in the meantime, The indicator will flash for low battery voltage(with 4 seconds of interval).
3.2 Reset/Test function
3.2.1 Reset: press lightly the “Reset/Test” button slightly, it will reset after all lights on in indicator
press ““Reset/Test” button, press on L1 and L2 in turn, then let go, after all lights are on at mean time once, the corresponding address lights is on. In 10s, corresponding address lights are on again, then self-checking finished.(indicator current address refer to label number in the back).address is corresponding to L1,L2,L3,E lights by BCD code, instructions is as following table:
|Address||black point means the corresponding LED is on|
3.2.3 L1,L2,Wireless function self-checking
press “Reset/Test” button, press on L1 and L2 and L3 in turn, then let go, the indicator will send wireless status message to upper computer, the “ battery low voltage” light will flash fast 3 times to indicate, it tells test finished. If transmission is failed, the test status will exit automatically in 1 minute. Operator also can press slightly on “Reset/Test” button to reset indicator and exit this status.
3.2.4 indicator address configure
When install the indicator, the panel indicator address should not be the same in the same RMU or switching station, if the address is same, it will result in the information transmission mixed error.each indicator labels its current address(when installed, its address also can be checked by the way of self-checking. If need to modify indicator address,please follow the following steps:press “Reset/Test” button, press on L1 and L2,L3,Earth fault lights in turn, then let go,light of “low battery voltage” flash(with an interval of 1s) and change to ready- setting state(automatically exit in 20s), press again“Reset/Test” button, lights of L1,L2,L3,Earth fault will display address (1-8)by the address sequence of BCD code, when it displays the address which requires to be configured, then let go at once,the expected address will flashing clockwise with the light of “low battery voltage”, at this time, press the button again and save this address. The operator can refer to the self-checking steps mentioned in 2.2 to check if the address written is right; if configuration is not right or cancel this configuration, please not save, the configuration status will exit automatically in 20s.
4.1 Show short circuit fault and earth fault locally.
4.2 Self-reset ,self-reset time can be set before delivery from factory (The default value is 12 hours).
4.3 Reset manully /self-test manually is available .
4.4 address of the indicators can be configured
5.1 The distance of fiber communication:
5.2 Ambient temperature:-35℃～70℃
5.3 Action times :more than 2000
5.4 Indicator power supply mode :built-in 3.6V/2Ah lithium cell.
5.5 Battery can be changed.
5.6 Life: continuous working for more than 10 years.
5.7 net weight :less than 0.5kg
5.8 Static power consumption :less than 12uA
Part 2 :The cable indicator of short circuit fault
The TYHD-2 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:
cable short circuit fault indicator
2. 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
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
4.1 Install and disassemble easily, be suitable for Cable lines with an external diameter of less than 40 mm.
4.2 detect short circuit
4.3 epoxy resin pouring,whole-sealed structure, suitable to run outdoors for a long time.
4.4The line load current can be detected automatically, no need to configure alarm parameters.
4.5 Inhibiting the switch-off surge current automatically.
4.6Fiber data communication:
Indicating locally the fault alarm signal transmitting from fault indicator to panel indicator(if no panel indicator, this function is not available).
4.7Taking electricity from cable current, equipped with built-in storage lithium battery, life is more than 15 years.
environment temperature:(-40～70)℃ maximum daily temperature difference is 25℃.
5.2 system specification
cable outer diameter: 10～40mm
maximum over-current protection time delay adaptable :＜4S
5.3 main technical performance and parameters
working power:taking electricity from line sensing current, one backup 3.6V/2Ah lithium battery is equipped for supply.
static power consumption:3.6V power supply, ＜5uA
designed life:10 years above
optical fiber communication distance:less than 10m
optical fiber data rate:9600bps
long endurance current:650A
cable earthed fault indicator
TYHD-2 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. The picture of product is below:
earthed fault detector
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.
4.1 Install and uninstall simply.adaptable to detect zero-sequence current in three-phase cable with outer diameter below 110mm.
4.2 Epoxy resin casting,adaptable to run outside in a long term
4.3 detect earthed fault
4.4 optical fiber communication
transmit fault signal from detector to panel indicator
4.5 Equipped with a Built-in a lithium battery, life is above 8 years
5. Performance index
5.1 Environmental index
environmental temperature:(-40～70)℃ maximum daily temperature difference is 25℃.
5.2 system specification
cable outer diameter:<110mm
5.3 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