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|Communication:||GPRS Real-time Communication||Function:||Indicate And Locate Short-circuit And Earth Fault|
|Receive Signals Of Fault Point:||Optical Fiber Receiving||Fault Information Transmitted:||By GSM/GPRS|
|Power Supply:||PT Supply Or Two Road Of CT Supply||Communication Protocol:||IEC870－5－101 Or IEC870－5－104|
underground cable fault distance locator,
underground electric cable fault locator
One whole system is composed of 1 Data transmission unit, 3 short-circuit fault indicators and 1 earthed indicator and 1 panel indicator, data transmitted by optical fiber and gprs or gsm.
Data transmission Unit is applied in power distribution network, used for data gathering and transmission for load detection ,fault detection and location in cable.
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 .
3.1 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 .
3.2 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.
3.3 Power supply way
There are two kinds of power supply method according to actual situation at site.
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.
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.
4.1 Optical fiber receiving: receive signals of fault point and load current from indicators by optical fiber network
4.2 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
4.3 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.
4.4 communication protocol:IEC870－5－101 or IEC870－5－104 to transmit fault information or shift information.
4.5. Remotely upgrade:device can easily be upgraded remotely
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＜15uA
measurement accuracy:0～180A:typical error±1.5A or±3％
long endurance current:500A
short endurance current:2000A/2S
optical fiber communication distance:15m
optical fiber data rate:9600bps
For more details please contact beijing tianyihongda science&technology development cooperation limited.
|DTU size||height×width×thickness=399mm×286mm× 84.5mm|
|Rate working voltage||CT supply not less than 10A|
|PT supply AC220V±20%|
|whole-set static power consumption||Below 240mW|
|whole-set maximum power consumption||570mW|
|equipped indicator numbers||32pcs|
|GPRS module||E-GSM/GPRS 900/1800 double-frequency band|