This kind of device is applied to the overhead power distribution
network automatic system from 6KV to 69KV,is used to improve the
safe and reliable operating performance through centralized
monitoring the current, temperature and fault condition on the
power distribution circuit.The fault indicator is used for
indicating of phase-to-phase and phase-to-earth faults by
determining short circuit, over-current and power features to
detect faults and provide a local light indication. In addition,
the indicator also has current measurement and wireless data
communication capabilities, by sending the fault signal to FTU,in
order to comply the function of the remote communication and the
remote monitoring, to help operators to find the point of failure
quickly and shorten the outage time and improve reliability.
The fault indicator installed on the overhead lines, which clipped
on each phase so that to detect current and Voltage signal in this
phase using itself clipped line structure. Through the low-power
chip, it completes current calculation, short circuit, ground fault
detection, and through built-in low-power RF modules achieves short
distance wireless communication.
After the indicator is installed, the line current has been
measured . When the current meet the characteristics of the fault,
the indicator immediately sends the fault current and the fault
information to the nearest terminal device by the RF, while
triggering a flop and flash indication.
The lineman simple follows the flashing fault indicators all the
way to the first non-flashing fault indicator, thereby identify the
The terminal device receives the fault information can further
upload, so master station can get useful information and determine
the fault zone according to the sub-station uploaded information.
This system of device is composed of communicable fault passage
indicator, data transmission unit, main station software and
Fault judge: identifying the Short-circuit fault , without testing
the action value
reset way: Timing reset, manual reset , Intelligent automatic reset
(A few minutes after Tripping, once the fault is cleared, reset
itself upon the power return)
Handling charge: installing and removing while line is in charging
Rust and corrosion protection: Structure part is made of
Surge suppression: to eliminate the wrong phenomenon of closing
The feature of the inverse: operating characteristics of maximum
protection with the substation,to improve the action accuracy
Indication: Flashing and triggering a flip
Drop: Products from a height of 1 meter free fall to the concrete
floor, no damage
The technical specifications:
Environment temperature: -35℃～70℃
Voltage grade: 7～69kV
Frequency: 50 Hz
Power source: taking power through the line and Built-in lithium
battery of 3.6V, more than 10 years shelf life
Indication: three high-intensity red LEDs, 360-degree visibility
Total indicating time: >2000 hours
Cable diameter range: 5～40mm
Long time withstand current: 630A
Short time withstand current: 31.5kA/2s
Reset time: 1～48 hours Settable, ± 1%
Weight : ≤500g
Size : Ф75(MAX)×115mm
Shocks and vibrations
Power frequency magnetic field test
When continuous sine waveform, 100A / m magnetic interference
applied to the indicator, it should work correctly.
b) Grip test
The downward pressure in the direction perpendicular to indicator
spring is not less than 8 times the weight of the overall indicator
.After fault indicator mounted ACSR, the transverse tension along a
direction of aluminum wire is not less than 50N. So that, Indicator
can withstand winds without falling from the line.
a) By fitting the bracket installed in the hot sticks, screw
detaching sheet nut to let the sheet fully retracted into the
interior of the column (ie: try to tighten the sides, leaving
enough space so as not to block the indicator when installing).
b)put the indicator into the bracket , and make the spring device
to hook with the indicator spring, and rotate the spring device
down firmly until after the indicator spring pulled position
retractor can hook, then hook the spring with retractor and pull t
he spring device out. And use the same method to the other side of
the same end of the indicator spring to hook retractors.
c) Aligning the overhead lines pushed up and under the pressure of
the overhead lines the indicator springs are divorced from the
retractor spring and stucked overhead lines firmly.
a)Install the bracket in the hot sticks,and let the hook outward
open, and screw detaching sheet nut to let the sheet leaned out of
the column.It is best to made the screws on both sides of the
detaching sheet leaving 4-5 buckle (wire length).
Data Transmission Unit
1. Device description
Remote terminal uint is the data acquisition and communications
forwarding device for power distribution network load monitoring,
fault detection and positioning system, which can be set as the
practical distribution terminal device of two remote (remote
signaling, telemetry) functions in the distribution automation
system via terminal parameter configuration, which can also be set
as the traditional distribution terminal device of remote fault
Remote terminal uint is to process and analyze the information from
overhead indicator sent via wireless and then send the circuit load
current and fault information to the main distribution network
station via GSM short messages or GPRS communication.
2. Working principle
Remote terminal uint is to receive the circuit fault information
and circuit load operation information from overhead indicator
installed in the circuit via wireless for analysis and compiling
and then sends the information to main distribution network station
via GPRS/GSM communications, to realize the online monitoring,
fault detection and positioning functions of distribution network.
3. Main features
3.1 GSM or GPRS forwarding
GSM (short messages) and GPRS (data) are mutually the standby mode,
which are used to send the substation condition, circuit load
current, indicator status and fault information to main
distribution network station, to ensure the reliable transmitting
of distribution network fault information.
3.2 Remote upgrade
The equipment program can be upgraded conveniently through master
remote maintenance station.
3.3 Work mode setting
The terminal can be in the two-remote or one-remote working mode by
setting the intrinsic parameters of remote terminal uint.
Two-remote working mode: the terminal is online in real time, and
the circuit load current and circuit status can be uploaded.
One-remote working mode: the terminal is online regularly; when the
circuit breaks down, the terminal opens GPRS module power supply
and sends the fault information to main distribution network
1. Wireless receiving: the fault point information and load current
information sent by indicator are received via short-range wireless
2. GSM or GPRS forwarding: GSM (short messages) and GPRS (data) are
mutually the standby mode, which are used to send the substation
condition, circuit load current, indicator status and fault
information to main distribution network station, to ensure the
reliable transmitting of distribution network fault information.
3. Solar power supply: the solar power supply mode is applied, and
the maintenance-free 8AH lead-acid battery or 12AH lithium iron
phosphate battery is provided, with the working temperature range
of both batteries of -35℃~75 ℃ and -20℃～75℃ separately.
4. Optional communication protocol: IEC870－5－101 protocol or 104
can be selected for the connection with the third party equipment
to upload the fault and shift information.
5. Remote upgrade: the equipment program can be upgraded
conveniently through master remote maintenance station.
6. Convenient maintenance: the parameter setting and equipment
maintenance can be performed conveniently via wireless setting
7. Event recording: the device can record the maximum 500 pieces of
SOE events, providing the rich data support for system fault
5. Technical parameters
|Dimension of repeater station||H×W×T=388mm×366mm×368mm|
|Weight of repeater station||6.75kg|
|Applied voltage grade||6~69kV overhead line|
|Circuit load current||0~630A|
|Rated working voltage||5.5V-7.5V|
|Overall power consumption||＜0.4W|
|Work time in rainy weather||≥10 days|
|Solar panel||Organic glass protection, amorphous silicon, and 30 years of
|Power of solar panel||18W/17.6V|
|Quantity of cooperation indicators||12|
|GPRS module||E-GSM/GPRS 900/1800 dual band|
|Working temperature range (lead-acid battery)||-35℃～75℃|
|Working temperature range (lithium iron phosphate)||-20℃～75℃|