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Test system and test method for control cable

A technology for controlling cables and testing systems, applied in the direction of measuring electricity, measuring devices, and measuring electrical variables, etc. It can solve problems such as errors in adjustment and management of test records, doubts about test accuracy, and inability to perform confirmation tests, so as to save manual labor. Effect of reducing construction cost and shortening test time

Inactive Publication Date: 2011-06-15
KK TOSHIBA
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Moreover, in the case of long cables, it is easy to doubt the accuracy of the test even if the cable is good
[0014] In addition, sometimes the cable is temporarily removed from the terminal block in order to ground one end of the cable or to measure the conduction resistance value during the test, which is the cause of the reconnection (cable recovery) error after the test.
In addition, there is a risk of error in relying on manual work adjustments and management of test records when an extremely large number of cable core connection inspections are performed in a short period of time
[0015] In the case of using the tester of Japanese Patent Application Laid-Open No. H9-89968, 2001-325116, or 2006-269213, monitoring is limited only to the judgment of a wrong connection of a single control cable, and whether the cable is cut or Judgment that there is a short circuit, and the confirmation test cannot be performed when the control cable is energized
And, because the cable must be removed from the terminal block once the validation test is performed, the risk of correcting errors after validation becomes a problem

Method used

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  • Test system and test method for control cable
  • Test system and test method for control cable
  • Test system and test method for control cable

Examples

Experimental program
Comparison scheme
Effect test

no. 1 example

[0031] The following will refer to figure 1 , Describe the first embodiment of the present invention. In the mode of this embodiment, the testers 8 and 9 are used to test the control cable 1 connecting the two devices 6 and 7.

[0032] By fixing the probe of the tester 8 in the terminal board 4 provided on one device 6, the tester 8 is connected to each end 1aa, 1ab, 1ac of the plurality of control cable cores 1a, 1b, 1c, and 1d via the terminal board 4. Connect with 1ad, and simultaneously apply test signals of different waveforms to those control cable cores 1a, 1b, 1c, and 1d. By fixing the probe of the tester 9 in the terminal board 5 provided on the other device 7, the tester 9 is connected to each end 1ba, 1bb of the plurality of control cable cores 1a, 1b, 1c, and 1d via the terminal board 5. , 1bc and 1bd are connected, and receive test signals applied via the control cable cores 1a, 1b, 1c, and 1d to be tested by the tester 8. By collecting the waveforms as test signa...

no. 3 example

[0047] The following will refer to Image 6 , Describe the third embodiment of the present invention. The same index numbers are assigned to those device functions that are the same as those of the first to second embodiments, and repetitive descriptions are omitted.

[0048] In the first and second embodiments, the module for judging the faulty connection of the cable is only on the receiving side of the test signal. However, in the configuration of this embodiment, the test signal information received by the receiving-side tester is transmitted to the transmitting side via the communication path 15, which is separated from the test target cable core, and only the judgment module is provided on the transmitting side, Thus, the defective connection of the cable can be judged.

[0049] In this configuration, it is possible to advantageously simplify the receiving-side tester by only providing a function for transmitting the information related to the received test signal, and becau...

no. 4 example

[0052] The following will refer to Figure 7 , Describe the fourth embodiment of the present invention. The same index numbers are assigned to those device functions that are the same as those of the first to third embodiments, and repetitive descriptions are omitted.

[0053] In the configuration of the present embodiment, the cable defect connection judgment processing section is provided in the receiving side tester, which is opposite to the configuration shown in the third embodiment. In the test signal transmission side tester 8, while the test signal is applied to the test target cable core, the test signal information is transmitted from the test target cable core to the receiving side tester 9 via the separate communication path 15, while at the same time On the receiving side, the judging module judges the defective connection of the cable by checking the test signal received via the test target cable core based on the test signal information.

[0054] With the above conf...

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PUM

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Abstract

This invention provides a testing system of control cable and a testing method which can shorten the testing time through automation and saving manual labor and reduce the building cost of the electrical field through a processing management tool combined the testing correctness and improved quality. A first tester applies testing signals with different wave lengths to each control cable core in a plurality of control cable cores through a terminal board at the same time, and a second tester receives the applied testing signal from the first tester from the control cable core. A correspondence table is pre-coded for each one of the first and second testers; the correspondence table collects the wave length of the testing signal, the number of the cable core of the control cable and the terminal board number connecting a destination. The second tester located at the receiving side judges that there is a flaw connection if the testing signal different from the correspondence table is received; and except the information taken by the testing information, the tester further monitors the reduction and the distortion of the wave length of the signal, and judges that the cable core for transmitting the testing signal is abnormal when the reduction and the distortion are over the monitoring standard value.

Description

Technical field [0001] The present invention relates to a control cable test system and a test method for connecting a plurality of devices such as a monitoring control board and a protection board. The plurality of devices are useful for various power devices such as GIS or transformers at power plants and substations. For monitoring, control, data collection or protection, the present invention also relates to techniques for reducing the construction cost of power plants. Background technique [0002] A plurality of devices such as a monitoring control board and a protection board are connected through a control cable, and the required information is sent and received through the control cable. The multiple devices are important for power plants and substations such as GIS or transformers. All kinds of power equipment such as monitoring, control, data collection or protection of various power equipment. When laying control cables in such power plants and substations, the condu...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G01R31/02G01R31/08
Inventor 奥田实松村显
Owner KK TOSHIBA