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The wireless insulator tester is used to test live suspension insulators or to detect the distributed voltage of suspension insulators in the laboratory. Its kind of insulation tester. It can effectively find hidden faults inside the insulators, improve the reliability of the grid system operation, and improve the efficiency of the line workers in the live test. The principle structure of the wireless insulator tester is analyzed using wireless transmission, and the communication distance between the detector and the handheld terminal can reach more than 100m, so that the measurement process is truly safe, reliable, fast and accurate.
With the continuous advancement of science and technology, there are more and more styles and types of wireless insulator testers, but the principle of wireless insulator testers is basically the same: the potential difference between two points of the insulator is measured, and the measured voltage is turned into an electric field. measuring. Therefore, the impedance is high, and the impact on the measured system is the least. The measured signal is internally amplified and processed, and then output by LCD digital display in the form of voltage value.
The principle and structure of the wireless insulator tester: measure the potential difference between two points of the insulator, the internal voltage is divided by high-voltage internal resistance, and then the voltmeter head reads the value. If the potential difference of a piece of insulator is O, then the piece of insulator is a zero value insulator. If a section in the test is 50% of the standard value, it means it is a degraded insulator. Draw the insulator distribution voltage curve based on the measured data. It is used to further confirm and judge the deteriorated insulator.
The schematic diagram of the principle structure of the wireless insulator tester is as follows:
The relevant standards based on the principle of LTJY-900 wireless insulator tester are shown in the following table:
| Serial number | standard name |
|---|---|
| 1 | GB50150-2006 "Electrical Equipment Installation Engineering Electrical Equipment Handover Test Standard" |
| 2 | GB/T.311-1997 "Insulation and coordination of high-voltage power transmission and transformation equipment" |
| 3 | DL/T626-2005 "Deteriorated Disc Suspension Insulator Inspection Regulations" |
| 4 | DL/T 596-2005 "Procedures for Preventive Tests of Power Equipment" |
| 5 | DL/T 846-2004 "High Voltage Test Equipment General Technical Conditions Series Standards" |
| 6 | DL/T 848-2004 "General Technical Requirements for High Voltage Test Equipment" |
| 7 | GB1094.1-GB1094.6-96 "Enclosure Protection Grade" |
