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
As we all know, the rapid development of society is inseparable from the construction of infrastructure, in which the spread of electricity plays an important role, the development of the whole society is inseparable from the stable operation of electricity. If the power failure is quickly resolved, it will be known for the regional economy, production and the rapid development of the society. The rapid development of the society is inseparable from the construction of infrastructure, and the spread of electricity plays an important role. The development of the whole society is inseparable from electricity. Stable operation. If the power failure is not resolved quickly, it will have an adverse effect on the regional economy, production and life.
Therefore, it is extremely important to quickly determine the device of the cable fault point. Cable fault tester is such a device. The working principle of the cable fault tester is to measure the reflected waveform of the low pressure pulse, and then generate an arc with a high pressure pulse to do a cable.
When the arc voltage drops to a certain value, trigger the medium pressure pulse stably extends the arc time, and then emits a low pressure pulse to obtain a reflective waveform of the fault point. After two waveforms, it can also be found that the divergence point is where the fault point corresponds. Due to the stable extension of the arc time by medium pressure pulse, the fault point waveform is easier than the secondary pulse.
Compared with the secondary pulse method, the three pulse method does not need to choose the synchronous firing time, it is simpler. The three pulse method uses a double impact method to extend the curved time, stabilize the curved shape, and easily locate high resistance faults and flash failures. Three pulse method technology advanced technology, simple operation, clear waveform, fast and accurate positioning, has become the mainstream positioning method of high resistance faults and flicker faults.
The three pulse method is the upgrade of the secondary pulse method. The general position between the full length and cable faults and the test end. Cable Fault Destinum is based on the cable fault tester, determine the correct position of the cable fault point to determine the accurate position of the cable fault point.
For the buried cable in an unknown direction, the power cable fault tester works: the power cable fault tester consists of three main components of the power cable fault tester, the cable fault positioner, and the cable path. Cable fault tester host used to measure the nature of cable failure. You need to use a pathometer to determine the underground direction of the cable.
The basic method of the fault test of the power cable is to apply a high pressure pulse to the fault cable, the cable fault is broken, the cable fault is broken, and the electromagnetic wave is generated outside the exterior, and the sound is sent. Let the cable's high resistance fault click to force an arc. At the same time, the test end adds the measured low-pressure pulse, and when the pulse is measured, when the pulse reaches the high-resistance fault point, the arc is encountered, the arc surface reflection is reflected.
Due to the arc burning, high-resistance faults become instantaneous short-circuit faults, the low pressure measurement pulse will change significantly, so that the waveform of lightning measurement becomes a low-voltage pulse shorter waveform, making the waveform specifically simple and clear. This is the so-called secondary pulse method receives a low pressure pulse failure, which is equivalent to a flash failure, combining a low-pressure pulse failure with a traditional high pressure pulse fault emission method, discharges low pressure pulse failure to a certain method (secondary pulse fault emission) To a certain method, high-voltage short-circuit faults, low-voltage short-circuit faults, high pressure pulse, low-voltage failure, low-circuit fault, low-circuit fault, low-circuit fault, low-circuit fault, low-circuit fault, low-circuit fault emissions The technique of low-circuit fault emissions low-circuit faulty emissions is determined. About cable fault tester related knowledge, Xiaobian will introduce you to everyone, I hope I can help everyone!
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