JBLG intelligent zero value insulator ground detectorTechnical Specifications

JBLG intelligent zero value insulator ground detector

I. Overview

1Overview

Insulators on transmission and transformation lines,Due to long-term exposure to mechanical and electrical loads, sun and rain, and changes in temperature during operation,Defects such as decreased insulation resistance, cracking, and even breakdown may occur. The insulation resistance value of high-voltage transmission line insulators directly affects the safe and stable operation of the line. Once there is a zero value defect in the insulator, it must be replaced as soon as possible, otherwise it may cause accidents such as flashover and tripping. Now it is live testing, which checks each insulator piece. Although zero value defects can be found in the insulator, the work is quite large, and the requirements for live testing personnel are high, resulting in significant safety hazards.JblgIntelligent zero value insulator ground detector, capable of detecting zero value defects in operating insulators on the ground

Online measurement, using census methods to determine zero defects. Transition the live detection method from pole and tower installation to regular ground inspections without pole and tower installation. If zero value defects are found in insulators, targeted live detection verification will be carried out to compensate for the shortcomings of regular preventive testing methods.

2. Functions and features:

2.1.Small size, light weight, novel structure, simple and fast operation, safe and reliable.

Applicable to35 kVAbove to1000 kVHigh voltage transmission lines and substations have disc-shaped suspension insulators.

2.2.Test result: There is a zero value defect in the operating insulator at the position of the tower, as well as the ground temperature and relative humidity.

• Zero value defect resolution: one piece.
• Measurement location: Tower grounding wire (multiple grounding wires do not need to be disconnected).

2.5.JBLG intelligent zero value insulator ground detectorMeasurement method: Ground detection on the tower grounding wire.

3. Technical indicators

3.1 Measurement shows the current value, ground temperature, and relative humidity of a specific frequency band on the tower ground wire.

3.2 Instrument composition: display instrument (including temperature and humidity measuring components), current measuring sensor.

3.3 Measurement range: Current:0～4999 µAAccuracy2 Grade; Auxiliary measurement: ① Temperature:0-60 ℃ accuracy1 Grade; ② Relative humidity<95%precision1 Grade.

3.4 Usage conditions ① Outdoor and online measurement ② ambient temperature 0～60℃

3.5 Measurement sensor inner window:80×15

3.6 Stable working hours2 minute

3.7 Working power supply:5^{#battery6 section}

3.8 Appearance: ① Instrument 350×280×180（mm³）； ② Measurement sensor:310×85×35（mm³）；

Total weight3.0 Kg(including backpack, aluminum alloy box) III. Instrument panel layout

Layout instructions:

（1）USB Socket (selected)

（2）RS232 Socket.

(3) Charging port, (internal positive, external).

(4) Power switch.

(5) LCD display.

(6) Touch the keyboard.

(7) Temperature measurement window.

(8) Moisture measurement window.

(9) Current sensing socket

(10)Battery box cover plate. 4、 Measurement operation instructions

4.1. Connect according to the diagram: da kai lock buckle, thread the grounding wire, fasten the lock buckle, and the grounding wire should be close to the sensor

Measurement area.

4.2. Insert one end of the instrument's self provided wiring into the instrument's wiring socket; Insert the other end into the sensor wiring socket. Open the dust cap of the temperature and humidity sensor (cover the tower after the detection work is completed)

4.3. The instrument needs to be preheated for 2 minutes before use.

4.4. Display interface operation: Press the power switch, and the screen will display the following main menu: Select main menu1：

Select main menu 1 and test:

pressENTERSave, return to continue measuring.

Press ESC to return to the main menu. Select main menu 2, search

Press the up and down keys to query data. Press ESC to return to the main menu.

Select main menu 3, Communication:

Option 2, Serial Communication

Press ENTER

Return to the main menu after transferring data. Select main menu 4, clock:

The data file is: L year month day A-Z.txt The numbering of 26 letters is variable.

4.5 Shutdown: Simply turn off the power switch.

When the instrument display screen indicates undervoltage, the battery should be charged in a timely manner. 5、 Precautions

5.1 Measurements should be taken in dry weather. This detector is not suitable for zero value measurement of towers equipped with lightning arresters and other devices.

5.2 Before use, open the battery box cover to install the battery. If stored for a long time, please remove the battery.

5.3 The voltage of the battery (1.2V, 6 cells) is less than 4.5 volts (the display screen indicates undervoltage). The battery should be charged in a timely manner.

If there are any other malfunctions with the instrument, please contact our company and do not disassemble or assemble it without authorization. 6、 Attachment

6.1 Connect one sensor to the host.

6.2 One nine pin serial port cable.

6.3 One 12VDC charger

6.4 Two coding tables (empty tables) corresponding to the line names and tower numbers. 7、 Fault diagnosis example (a power supply company adopts the following method):

7.1 Measurement requirements: ① Environmental temperature greater than 0 ℃; Is the relative humidity less than 65? Measurements should be taken on sunny days.

② Suitable for towers with overhead ground wires.

③ During measurement, it is not necessary to open another ground wire.

7.2 (Zero value defect judgment) 1) Comparison of measurement values: The change in measurement values for the same tower (half a year apart from the last time) is greater than 50.

7.3 (Zero value defect judgment 2) Measurement: The sum of ground wire leakage currents (multiple) of 110KV transmission towers in the primary circuit is greater than

2300µA. Primary circuit tower 500KV The sum of the leakage currents (multiple) of the ground wires of the transmission tower is greater than 3500µA。

7.3 (Determination of Defects in Tower Grounding Devices) If significant differences are found in the measured values on two ground wires of the same tower during measurement, they should be checked and measured

Is the one with the smaller value in poor contact; If the measured value is ≤ 30µA， The continuity of the grounding wire or the grounding condition of the grounding device should be checked.