CN217133293U

CN217133293U - Control cable line inspection test system

Info

Publication number: CN217133293U
Application number: CN202220518774.3U
Authority: CN
Inventors: 刘彦超; 王建军; 张鹏飞; 李�浩; 李培军; 刘杰; 王永翔
Original assignee: Luohe Power Supply Company State Grid Henan Electric Power Co
Current assignee: Luohe Power Supply Company State Grid Henan Electric Power Co
Priority date: 2022-03-08
Filing date: 2022-03-08
Publication date: 2022-08-05
Anticipated expiration: 2032-03-08

Abstract

The utility model relates to a control cable tests technical field, concretely relates to control cable inspection test system, include: the test host is connected with the initial ends of the control cable cores and sequentially outputs test signals to each core to be tested; and the terminal connectors are connected with the control cable core terminals, the terminal connectors connect every two cores to be tested, and the terminal receiver receives the test signals output by the test host and returns the test signals to the test host. The utility model discloses control cable inspection test system has realized that the break-make of once-through test device accomplishes all sinle silks of control cable tests, and the mark constitutes the sinle silk in return circuit to test out the loop resistance value, saved the manual work, shortened test time, for the matching between the equipment provides the reference, reduce energy loss in the operation, provide the foundation for troubleshooting.

Description

Control cable line inspection test system

Technical Field

The utility model relates to a control cable tests technical field, concretely relates to control cable inspection test system.

Background

The control cable is mainly suitable for control, signal, protection and measurement circuits with 50-60 Hz direct current or alternating current and 600/1000V rated voltage or below, is usually used for fixedly laying in an electrical control system and an electrical device, and generally has the advantages of discontinuous load, small current, small core wire section and more copper conductors adopted by the core wire in the control circuit.

The control cable is mainly applied to the internal connection of a power system, an information transmission system, electrical equipment and an electrical instrument, and realizes information interaction between equipment by sending and receiving electric signals. In power and information systems, all of these devices use a large number of wires and cables from the beginning of the system, through various nodes of the system to the end, and control cables serve as connections between components to transmit power or signals.

The control cable plays an important role in the normal operation of electrical equipment, cable faults caused by manufacturing, construction and the like are hidden and are not easy to check, in addition, the direct current resistance of the control cable is an important index of the quality of the cable, the direct current resistance of the control cable is measured less, errors are large, an accurate measurement result cannot be accurately given, the matching degree of the equipment cannot be judged, and whether the requirements of related standard regulations are met or not (GB/T50063 electric power device electric measuring instrument device design specification, DL/T866 current transformer and voltage transformer selection and calculation specification, DL/T5136 secondary wiring design technical specification of a thermal power plant and a substation). During testing, each cable core needs to be conducted and tested at two ends of the cable, integrity of the cable cores is guaranteed, and resistance matching is carried out on the cable cores and equipment, so that errors are reduced. Usually, the cable both ends department all stands someone, carries out conductivity test once at every turn to a cable core simultaneously through personnel's cooperation, and the conductivity test is consuming time and with high costs, and can not accurately test the sinle silk resistance, can't accomplish simultaneously and test and resistance measure.

Chinese patent publication No. CN101290338B discloses a control cable test system and test method that can shorten the test time by automation and saving manual labor, and reduce the construction cost of a power plant by a consistent process management tool combined with test correctness and quality improvement. The first tester applies test signals of different waveforms to each of the plurality of control cable cores via the terminal board at the same time, and the second tester receives the applied test signals from the first tester via the control cable cores. A correspondence table that collects applied terminal block numbers as test signal waveforms, the number of cable cores of the control cable, and connection destinations is previously prepared for each of the first and second testers. Upon receiving a test signal that does not coincide with the correspondence table, a second tester on the receiving side judges that there is a defective connection, and in addition to the information carried by the test signal, the tester monitors attenuation and distortion of the signal waveform, and in the case where the attenuation and distortion exceed a monitoring reference value, judges that an abnormality has occurred in the cable core that transmits the test signal. However, the patent only tests whether a single wire core is conducted or not, resistance is not measured, signals with different waveforms are used for testing, and the structure is complex.

SUMMERY OF THE UTILITY MODEL

For overcoming the above-mentioned defect, the utility model aims to provide a control cable line-checking test system has realized the break-make test of once installing testing arrangement and accomplishing all sinle silks of control cable, and the mark constitutes the sinle silk in return circuit to test out return circuit resistance value, saved the manual work, shortened test time, for the matching between the equipment provides the reference, reduce energy loss in the operation, provide the foundation for troubleshooting.

In order to achieve the above purpose, the utility model adopts the following technical scheme:

a control cable inspection test system comprising:

the test host is connected with the initial ends of the control cable cores and sequentially outputs test signals to each core to be tested;

and the terminal connectors are connected with the control cable core terminals, the terminal connectors connect every two cores to be tested, and the terminal receiver receives the test signals output by the test host and returns the test signals to the test host.

Preferably, the test signal is a current signal.

Preferably, the test host includes:

the current output module consists of a constant current source, is provided with an output circuit and applies a current signal to a core to be tested of the control cable through a wiring port;

the detection marking module is used for sequentially detecting current signals of the other wiring ports, measuring voltage, marking the wiring ports capable of detecting the current signals as the same group, and outputting a voltage measurement result and the marking information of the wiring ports of the same group to the calculation output module;

the calculation output module calculates the resistance value of the loop according to the voltage measurement result of the detection marking module and outputs the resistance value and the marking information of the same group of wiring ports to the display module;

and the display module is used for displaying the loop resistance value and the same group of wiring port mark information which are obtained by calculation of the calculation output module.

Preferably, the current output module outputs one current signal each time, and selects an unmarked wiring port to output the next current signal according to the marking information of the same group of wiring ports of the detection marking module until the test of all the wire cores is completed.

The utility model discloses an actively beneficial effect:

1. the utility model discloses at first need discernment return circuit when control cable inspection test system tests, on the basis of discerning two sinle silks in same return circuit, test out the return circuit resistance value, can be to control cable automatic identification and match in groups, the loop resistance value is measured simultaneously, and realized that one-time installation testing arrangement just can accomplish all sinle silk tests moreover, saved the manual work, shortened test time, for the matching between the equipment provides the reference, reduce energy loss in the operation, provide the foundation for troubleshooting.

2. The utility model discloses output signal is constant current source current signal, and it is less to receive the influence of test environment, and the accuracy is higher, and when current signal was applyed in the test object, voltage measurement changed the realization, more can improve test speed.

Drawings

Fig. 1 is the structure block diagram of the control cable inspection and test system of the present invention.

Detailed Description

The invention will be further described with reference to some specific embodiments.

Example 1

Referring to fig. 1, a control cable inspection test system includes:

test host computer, including the wiring port, be connected with control cable core top, test host computer exports test signal in proper order to every sinle silk that awaits measuring, promptly: the test host outputs a test signal each time, one wire core to be tested is tested, and the test host outputs a test signal to the next wire core to be tested;

the terminal connector comprises a wiring port and is connected with a control cable core terminal, the terminal connector connects the cores to be tested in pairs to form a loop, the terminal receiver receives a test signal output by the test host and returns the test signal to the test host to complete a test process, and if the test host does not receive the return signal in a certain test process, the terminal connector judges the cores to be tested to be suspicious fault cores; and one test flow is completed, the next test flow is performed according to the test flow, the tested wire cores forming the loop are not tested any more, and the test of all the wire cores is completed in sequence.

Furthermore, the test signal is a current signal, the current signal is less influenced by a test environment, the accuracy is higher, and when the current signal is applied to a test object, voltage measurement is easier to realize, and the test speed can be improved.

Further, the test host comprises:

Furthermore, the current output module outputs one current signal each time, and selects the unmarked wiring port to output the next current signal according to the marking information of the same group of wiring ports of the detection marking module until the test of all the wire cores is completed.

The method for testing the control cable by utilizing the control cable plugging test system comprises the following steps:

step 1: the starting ends of all the wire cores to be tested are connected into the wiring port of the test host, the terminals are connected into the wiring port of the terminal connector, and the terminal connectors connect the wire cores to be tested in pairs to form loops, so that reliable connection is ensured;

step 2: the constant current source of the current output module applies voltage U to a first wire core, output current I, the current of the residual wire core is sampled in sequence by the detection marking module, two wire cores forming a loop can be conducted, the current is I, the same group of wire cores are judged, measurement voltage U 'is recorded, meanwhile, the resistance value of the group of wire cores is solved through ohm law (R ═ U')/I), the impedance is small, the voltage is low, the connection of the wire cores is reliable, a test flow is completed, the next test flow is carried out, the marked wiring port is not tested any more, the test is completed until all ports are tested, namely: the current output module outputs a current signal each time, and selects the wiring port which is not marked to output the next current signal according to the tested same group of wiring ports marked by the detection marking module, and tests of the rest wire cores are sequentially carried out in this way until the tests of all the wire cores are completed;

and step 3: in a certain test flow, the current output module constant current source outputs current I to a certain core, when the detection marking module cannot detect the current of the rest cores, the detection marking module marks the core of the current signal input this time as a suspected fault core, and after the test of all cores is completed, all the suspected fault cores are subjected to fault removal, so that the line inspection test of all the cable cores to be controlled is completed according to the method.

Finally, the above embodiments are only used for illustrating the technical solutions of the present invention and not for limiting, and other modifications or equivalent replacements made by the technical solutions of the present invention by those of ordinary skill in the art should be covered within the scope of the claims of the present invention as long as they do not depart from the spirit and scope of the technical solutions of the present invention.

Claims

1. A control cable inspection test system, comprising:

2. The control cable inspection test system of claim 1, wherein the test signal is a current signal.

3. The control cable inspection test system of claim 2, wherein the test host comprises:

4. The control cable inspection test system of claim 3, wherein the current output module outputs one current signal at a time, and selects the unmarked connection port to output the next current signal according to the same set of connection port marking information of the detection marking module until the test of all the cores is completed.