NOYAFA Electronic specializing in testing instruments and cable testers for 16 years
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NOYAFA Electronic specializing in testing instruments and cable testers for 16 years
Author: Noyafa–Cable Tester Manufacturer
How to operate the cable fault detector The wide application of the cable fault detector has effectively improved the efficiency of cable fault detection. However, many people do not understand the performance of the cable fault detector equipment, so they operate blindly, thus affecting the accuracy of the detection equipment. How to operate the cable fault detector The wide application of the cable fault detector effectively improves the efficiency of cable fault detection.
However, many people do not understand the performance of the cable fault detector equipment, so they operate blindly, thus affecting the accuracy of the detection equipment. The following editor will give you some basic knowledge of the operation of cable fault detector. Before detecting a cable fault, it is necessary to first understand the cause of the cable fault and the basic conditions of the cable.
For example, whether the cable has failed or failed in operation, the approximate length of the new cable or the cable that has been running for a long time, whether there is a joint in the middle of the cable, whether the cable has failed before, whether the cable is directly buried or laid in the cable groove, whether the cable is type, etc. When testing the cable, both ends of the cable must be disconnected from other lines to ensure that the cable has no power. The environment around the cable is in a safe state.
Before the testing equipment is connected to the cable, it must be noted that each phase wire of the cable is connected to the ground with a short wire, and one end of the short cable must be grounded, and the other end must be connected to the discharge of each phase wire of the cable. Other electrical appliances such as capacitors, test transformers, etc., should be discharged before wiring. In short, to develop the habit of operation, before each operation, pay attention to the operation and circuit connection of the electrical appliance, put it first, and then operate it.
When testing, first use the low-voltage pulse function of the flash meter to test the full length of each phase of the cable to see if the waveforms of the three-phase armoring test are consistent; for most high-resistance faults, the test waveforms of each phase are consistent. In case of resistance fault and high blocking phase fault, the fault phase test waveform is inconsistent with the full length of the cable under test, and the fault distance can be directly measured with low-voltage pulses. Regardless of whether the cable fault is a high-resistance fault or a low-resistance fault, it can be tested by the high-voltage flashover method; for low-resistance or disconnection faults that can directly test the fault distance with low-voltage pulses, it is generally necessary to use high-voltage flashover to verify the test and locate. point of failure. After the high-voltage flashover test is completed, the fault can be located by determining the fault distance.
When using the acousto-magnetic synchronous locator, fault localization and path detection can be performed simultaneously. Shenzhen Noyafa Electronic Technology focuses on the development and production of cable testing equipment Shenzhen Noyafa Electronic Technology Co., Ltd. is a wholly-owned subsidiary invested and established by Noyafa (stock code: 831548), a listed company on the New Third Board. R&D, production and sales of cable fault tester, multiple pulse cable fault tester, cable safety test device, cable identification instrument, cable fault precise location instrument, high-voltage cable outer sheath fault tester, high-voltage bridge fault tester Instrument, light high voltage signal power supply and other high and low voltage power test equipment.
On the basis of strong technical force, the company optimizes reforms and brings forth new ideas, so as to continuously improve product quality and production technology. The products have the characteristics of professional quality, precision and intelligence, stability and efficiency, lightness and portability, simple operation, safety and durability. Over the years, the excellent product performance has brought significant economic benefits to users and won the trust and praise of customers.
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