Relay protection device action contact test junction box, wiring system and method
Through the design of the combination of the relay protection device, the teste of the motion contact box, the programming logic controller is used to select the test method and the partition access contact, solve the problem of low sensitivity of the existing test method, large workload and insufficient access volume, and realize efficient efficiency , Safe test process.
Patent Information
- Application Number
- CN202411509080.3
- Authority / Receiving Office
- CN · China
- Patent Type
- Applications(China)
- Current Assignee / Owner
- Filing Date
- 2024-10-28
- Publication Date
- 2025-01-28
AI Technical Summary
The existing relay protection device action contact testing methods have problems such as insensitive measurement results, large workload, complex wiring and insufficient access to the test instrument, resulting in low testing efficiency and increased safety risks.
Design a type of relay protection device action connection test wiring box, built -in programmable logic controller, can choose potential connection test or dry connection point test, and use the design of the switch module, access area and the connection area, partition access to partition access, partition access area access area, partition access access area, partition access access area, partition access access area access area, partition access access area, partition access access area, partition access access area, partition access access area, partition access access area, partition access area access Activity and non -action contacts, and output the unique contact to the tester through different or logical output.
The high sensitivity, reduced workload, simplified wiring, and improvement of test efficiency, solved the problem of insufficient tested instrument access, and reduced safety risks.
Smart Images
Figure CN119375693A_ABST
Abstract
Description
Technical Field
[0001] The invention belongs to the technical field of relay protection and control of electric power systems, and in particular relates to a relay protection device action contact test junction box, a wiring system and a method. Background Art
[0002] In the regular inspection of relay protection devices in conventional substations, it is necessary to inspect the action output circuit of the relay protection device. Before carrying out the test, it is necessary to take secondary circuit safety measures, that is, to remove the negative power terminal of the operating power supply of the output tripping circuit. There are two mainstream testing methods: the potential contact method uses a relay protection test instrument to apply voltage and current to the relay protection device, and use the DC voltage gear of the multimeter in front of the protection screen to test whether the lower end of the outlet hard pressure plate is positively charged. If it is positively charged, it means that the protection action contact is closed, otherwise, the protection action contact is not closed; the dry contact method uses a relay protection test instrument to apply voltage and current to the relay protection device. At the same time, the two ends of each outlet contact to be tested are connected to the access terminal of the relay protection test instrument with a test line to measure whether the contact is closed.
[0003] However, the potential contact method has the problem that the tripping pulse of the protection device lasts for a short time. If the probes of the multimeter are not in proper contact or the meter display is not sensitive enough, the measurement results will be affected. In addition, the test personnel may find it difficult to capture the numerical changes on the meter display in time, which requires repeated testing and verification. On the other hand, the protection device has a large number of outlet hard pressure plates. For example, the main transformer protection, in addition to the outlet pressure plates for tripping the switches on each side, also includes failure prevention, pressure relief, tripping of main coupling section switches, joint tripping and automatic transfer, as well as spare outlet pressure plates. If the multimeter is used for potential tests one by one, each test must be repeated and increased. When there is more than one branch on each side of the main transformer, the workload and test time of the regular inspection test personnel will be greatly increased.
[0004] On the one hand, the dry contact method requires two test wires for each action contact, and connecting both ends to the relay protection test instrument results in a large amount of wiring work; on the other hand, the relay protection test instruments currently on the market can only support a maximum of 8 connections, which cannot meet the requirements of one-time access to all the outlet circuits to be tested for busbar protection, main transformer protection, etc., resulting in the need to repeatedly disconnect the wires during the test, which greatly increases the complexity of on-site work and also brings great risks to the restoration of safety measures of the relay protection device. Summary of the invention
[0005] In order to solve the above problems existing in the prior art, the present invention is implemented by the following technical solutions:
[0006] In the first aspect of the present invention, a relay protection device action contact test junction box is provided, in which a programmable logic controller is arranged; the programmable logic controller includes a switching switch module connected in sequence and capable of selecting potential contact testing or dry contact testing, an access area for accessing the contacts of the relay protection device, and an access area for connecting the relay protection tester.
[0007] The conversion switch QF in the conversion switch module includes a dry contact 1 and a potential contact 2, the dry contact 1 is connected to the output interface M of the AC / DC conversion module, and the potential contact 2 is connected to the access common terminal interface S / S.
[0008] The access area includes an access common terminal module, an access area module for contact points that should be operated, and an access area module for contact points that should not be operated; the access common terminal module includes an access common terminal contact point and an access common terminal interface S / S; the access area module for contact points that should be operated includes a plurality of access modules for contact points that should be operated; the access area module for contact points that should not be operated includes a plurality of access interface modules that should not be operated, a first resistor, a light emitting diode DM1, and a first phototransistor that are sequentially connected;
[0009] The output area includes an output common terminal module, a contact output module that should be operated, and a contact output module that should not be operated; the output common terminal interface COM in the output common terminal module is connected to the output common terminal contact; the contact output module that should be operated includes a plurality of contact output modules that should be operated; the contact output module that should not be operated includes a switch KN1, an output interface N1 that should not be operated, and an output contact that should not be operated;
[0010] The junction box is provided with jacks corresponding to the contacts of each module in the junction box.
[0011] Among them, the number of the actionable contact access modules and the actionable contact output modules is preferably 4; the number of the non-actionable access interface modules is preferably 3.
[0012] In a second aspect of the present invention, a relay protection device action contact test wiring system is provided, comprising a relay protection screen for providing contacts to be tested, a junction box and a relay protection tester for testing the contacts to be tested.
[0013] Among them, the programmable logic controller arranged in the junction box includes a switching switch module which is connected in sequence and can select potential contact test or dry contact test, an access area for connecting to the contacts of the relay protection device and an access area for connecting to the relay protection tester.
[0014] The conversion switch QF in the conversion switch module includes a dry contact 1 and a potential contact 2, the dry contact 1 is connected to the output interface M of the AC / DC conversion module, and the potential contact 2 is connected to the access common terminal interface S / S.
[0015] The access area includes an access common terminal module, an access area module for contact points that should be operated, and an access area module for contact points that should not be operated; the access common terminal module includes an access common terminal contact point and an access common terminal interface S / S; the access area module for contact points that should be operated includes a plurality of access modules for contact points that should be operated; the access area module for contact points that should not be operated includes a plurality of access interface modules that should not be operated, a first resistor, a light emitting diode DM1, and a first phototransistor that are sequentially connected;
[0016] The output area includes an output common terminal module, a contact output module that should be operated, and a contact output module that should not be operated; the output common terminal interface COM in the output common terminal module is connected to the output common terminal contact; the contact output module that should be operated includes a plurality of contact output modules that should be operated; the contact output module that should not be operated includes a switch KN1, an output interface N1 that should not be operated, and an output contact that should not be operated;
[0017] The junction box is provided with jacks corresponding to the contacts of each module in the junction box.
[0018] Among them, the number of the actionable contact access modules and the actionable contact output modules is preferably 4; the number of the non-actionable access interface modules is preferably 3.
[0019] In a third aspect of the present invention, a wiring method for a relay protection device action contact test junction box and a wiring system is provided, the wiring method comprising:
[0020] After the secondary return safety measures, choose to test using potential contacts or dry contacts;
[0021] If dry contacts are used, turn the switch to dry contact 1, connect the common terminal of the relay protection device to be tested to the access common terminal, and connect the contacts to be tested of the relay protection device to the contact access area that should be operated and the contact access area that should not be operated respectively; connect the output common terminal to the access common terminal of the relay protection tester, and connect the contacts in the output module of the contact that should be operated and the output module of the contact that should not be operated to the input terminals of the relay protection tester;
[0022] If potential contacts are used, turn the conversion switch to potential contact 2, connect the common terminal of the relay protection device to be tested to the access common terminal connection point, and connect the contacts to be tested of the relay protection device to be tested to the contact access area that should be operated and the contact access area that should not be operated respectively; connect the output common terminal connection point to the ground terminal of the relay protection tester, and connect each contact in the contact output module to be operated and the contact output module that should not be operated to the input terminal of the relay protection tester.
[0023] Compared with the prior art, the present invention has the following beneficial effects:
[0024] The present invention provides a relay protection device action contact test junction box, wiring system and method. On the one hand, potential contacts or dry contacts can be selected for access through a conversion switch, that is, the access area and the access area can adapt to both the protection action contact test mode of the "potential contact" method and the protection action contact test mode of the "dry contact" method; on the other hand, the protection contacts that should be activated and the protection contacts that should not be activated are accessed in partitions, and the protection contacts that should not be activated ultimately output only one group of contacts to the relay protection tester through exclusive OR logic, thereby solving the problem of insufficient access ports of the relay protection tester.
[0025] The present invention will be further described in detail below with reference to the accompanying drawings and embodiments. BRIEF DESCRIPTION OF THE DRAWINGS
[0026] Figure 1 The invention discloses a circuit wiring diagram of a programmable logic controller in a relay protection device action contact test junction box provided by an embodiment of the invention.
[0027] Figure 2 It is a functional structure diagram of a relay protection device action contact test junction box provided by an embodiment of the present invention.
[0028] Figure 3 The present invention provides a structural diagram of a relay protection device action contact test wiring system.
[0029] Figure 4 The present invention provides a flowchart of a method for testing the wiring of the operating contacts of a relay protection device. DETAILED DESCRIPTION
[0030] In order to further explain the technical means and effects adopted by the present invention to achieve the predetermined invention purpose, the scheme according to the present invention is described in detail below in conjunction with the accompanying drawings and specific implementation methods.
[0031] The above and other technical contents, features and effects of the present invention are clearly presented in the following detailed description of the specific implementation modes in conjunction with the accompanying drawings. Through the description of the specific implementation modes, the technical means and effects adopted by the present invention to achieve the predetermined purpose can be more deeply and specifically understood. However, the attached drawings are only for reference and explanation purposes and are not used to limit the technical solutions of the present invention.
[0032] It should be noted that, in this article, relational terms such as first and second, etc. are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Moreover, the terms "include", "comprise" or any other variants are intended to cover non-exclusive inclusion, so that an article or device including a series of elements includes not only those elements, but also other elements that are not explicitly listed. In the absence of more restrictions, the elements defined by the statement "including one..." do not exclude the existence of other identical elements in the article or device including the elements.
[0033] The first aspect of the technical solution of the present invention provides a relay protection device action contact test junction box, such as Figure 1 As shown, the programmable logic controller in the junction box in this embodiment includes a switching switch module that can select potential contact testing or dry contact testing, an access area for connecting to the contacts of the relay protection device, and an access area for connecting to the relay protection tester.
[0034] The conversion switch QF in the conversion switch module includes a dry contact 1 and a potential contact 2, the dry contact 1 is connected to the output interface M of the AC / DC conversion module, and the potential contact 2 is connected to the access common terminal interface S / S.
[0035] The access area includes an access common terminal module, an access area module for contact points that should be acted upon, and an access area module for contact points that should not be acted upon. The access common terminal module includes an access common terminal contact and an access common terminal interface S / S; the contact access area module that should be acted upon is composed of four contact point access modules, namely, a first contact point access module that should be acted upon, a second contact point access module that should be acted upon, a third contact point access module that should be acted upon, and a fourth contact point access module that should be acted upon; the first contact point access module that should be acted upon includes a first contact point that should be acted upon, a contact point input interface X1, a second resistor, a light-emitting diode DX1, and a second phototransistor that are connected in sequence; the second contact point access module that should be acted upon includes a second contact point that should be acted upon, a contact point input interface X2, a third resistor, a light-emitting diode DX2, and a third phototransistor that are connected in sequence; the third contact point access module that should be acted upon includes a third contact point that should be acted upon, a contact point input interface X3, a fourth resistor, a light-emitting diode DX3, and a fourth phototransistor that are connected in sequence; and the fourth contact point access module that should be acted upon includes a third contact point that should be acted upon, a contact point input interface X3, a fourth resistor, a light-emitting diode DX3, and a fourth phototransistor that are connected in sequence. The action contact access module includes a fourth actionable input contact, an actionable input interface X4, a fifth resistor, a light-emitting diode DX4 and a fifth phototransistor connected in sequence; the non-actionable contact access area module includes a non-actionable access interface module, a first resistor, a light-emitting diode DM1 and a first phototransistor connected in sequence; the non-actionable contact access interface module includes a first non-actionable access interface module composed of a first non-actionable input contact connected to a non-actionable input interface M1, a second non-actionable access interface module composed of a second non-actionable input contact connected to a non-actionable input interface M2, and a third non-actionable access interface module composed of a third non-actionable input contact connected to a non-actionable input interface M3; the first, second and third non-actionable access interface modules are commonly connected in sequence to the first resistor, the light-emitting diode DM1 and the first phototransistor.
[0036] The access area includes an access common terminal module, a contact output module that should be operated, and a contact output module that should not be operated. In the access common terminal module, the access common terminal interface COM is connected to the access common terminal contact; the contact output module that should be operated includes a first contact access module composed of a switch K1, an output interface Y1 and a first output contact that should be operated, a second contact access module composed of a switch K2, an output interface Y2 and a second output contact that should be operated, a third contact access module composed of a switch K3, an output interface Y3 connected to a third output contact that should be operated, and a fourth contact access module composed of a switch K4, an output interface Y4 and a fourth output contact that should be operated; the contact output module that should not be operated includes a switch KN1, an output interface N1 that should not be operated, and an output contact that should not be operated.
[0037] like Figure 2As shown, the junction box is provided with a switching switch module inside the junction box, an access area for accessing relay protection contacts composed of an access common terminal module, an access area module for contacts to be activated and an access area module for contacts that should not be activated, and jacks corresponding to the contacts in the access area for connecting the relay protection tester composed of an output common terminal module, an output contact module for contacts to be activated and an output contact module for contacts that should not be activated.
[0038] When accessing the dry contact, turn the conversion switch QF to contact 1, and directly connect the 24V DC power supply converted by the AC / DC conversion module in series to the loop. At this time, the access common terminal contact is used to access the common terminal of any relay protection device to be tested. The first to fifth resistors play a current limiting role to prevent overvoltage from damaging the diode. The access common terminal is used to connect to the access common terminal of the relay protection tester.
[0039] If any contact of the connected relay protection device that should be operated is turned on, the corresponding light-emitting diode will light up, the photosensitive transistor connected to the right side will be turned on, and the conduction signal will be transmitted to the logic operation program module of the PLC; through the PLC circuit logic operation program module, it can be realized that when the contact to be tested of the relay protection device is closed, X1~X4 is high level, the upper switches corresponding to Y1~Y4 are turned on, and the contacts connected to the relay protection tester corresponding to the switches are also turned on, and the closed contacts are connected to the relay protection tester, which means that the contacts of the relay protection device that should be operated are considered to be operated;
[0040] When X1~X4 are at a low level, the contact to be tested of the node protection device is closed, the upper switches corresponding to Y1~Y4 are disconnected, and the contacts corresponding to the switches connected to the relay protection tester are not conductive, and the relay protection tester will not receive the access of the closed contact, that is, it is considered that the contact that should be operated by the relay protection is not operated; when any one of M1~M3 is at a high level, the KN1 switch is closed, and the relay protection tester will receive the access of the closed contact of N1, that is, it is considered that the contact that should not be operated by the relay protection device is operated. Therefore, only when the relay protection tester does not receive the access of N1 contact, it means that all the measured contacts of the relay protection devices that should not be operated are not operated.
[0041] When accessing the potential contact, turn the conversion switch QF to contact 2, and do not access the 24V DC power supply converted from the AC power supply. At this time, the common terminal contact is used to access the common terminal voltage of the relay protection device, and access the loop through the common terminal interface S / S. The first to fifth resistors play a current limiting role to prevent overvoltage from damaging the diode. The common terminal contact is connected to the ground terminal of the relay protection tester.
[0042] If any of the connected contacts that should be operated is turned on, the corresponding light-emitting diode will light up, the phototransistor connected to the right side will be turned on, and the conduction signal will be transmitted to the logic operation program module of the PLC; through the PLC circuit logic operation program module, it can be realized that when the contact to be tested of the relay protection device is closed, X1~X4 is high level, the upper switches corresponding to Y1~Y4 are turned on, and the contacts connected to the relay protection tester corresponding to the switches are also turned on, and the closed contacts are connected to the relay protection tester, which means that the contacts of the relay protection device that should be operated are considered to be operated;
[0043] When X1~X4 are at a low level, the contact to be tested of the node protection device is closed, the upper switches corresponding to Y1~Y4 are disconnected, and the contacts corresponding to the switches connected to the relay protection tester are not conductive, so the relay protection tester will not receive the access of the closed contacts, that is, it is considered that the contacts that should be operated by the relay protection are not operated; when any one of M1~M3 is at a high level, the KN1 switch is closed, and the relay protection tester will receive the access of the closed contacts of N1, that is, it is considered that the contacts of the relay protection device that should not be operated are operated. Therefore, only when the N1 contact is not closed, it means that all the measured contacts that should not be operated by the relay protection are not operated.
[0044] The second aspect of the technical solution of the present invention provides a relay protection device action contact test wiring system, such as Figure 3 As shown, it includes a relay protection screen to be tested placed inside the relay protection device to be tested and used for providing contacts to be tested, a junction box and a relay protection tester to test the contacts to be tested.
[0045] The programmable logic controller in the junction box includes a sequentially connected conversion switch module capable of selecting potential contact test or dry contact test, an access area for accessing the contacts of the relay protection device, and an access area for connecting the relay protection tester.
[0046] The programmable logic controller comprises a sequentially connected conversion switch module capable of selecting a potential contact test or a dry contact test, an access area for accessing the contacts of a relay protection device, and an access area for connecting a relay protection tester.
[0047] The conversion switch QF in the conversion switch module includes a dry contact 1 and a potential contact 2, the dry contact 1 is connected to the output interface M of the AC / DC conversion module, and the potential contact 2 is connected to the access common terminal interface S / S.
[0048] The access area includes an access common terminal module, an access area module for contact points that should be acted upon, and an access area module for contact points that should not be acted upon. The access common terminal module includes an access common terminal contact and an access common terminal interface S / S; the contact access area module that should be acted upon is composed of four contact point access modules, namely, a first contact point access module that should be acted upon, a second contact point access module that should be acted upon, a third contact point access module that should be acted upon, and a fourth contact point access module that should be acted upon; the first contact point access module that should be acted upon includes a first contact point that should be acted upon, a contact point input interface X1, a second resistor, a light-emitting diode DX1, and a second phototransistor that are connected in sequence; the second contact point access module that should be acted upon includes a second contact point that should be acted upon, a contact point input interface X2, a third resistor, a light-emitting diode DX2, and a third phototransistor that are connected in sequence; the third contact point access module that should be acted upon includes a third contact point that should be acted upon, a contact point input interface X3, a fourth resistor, a light-emitting diode DX3, and a fourth phototransistor that are connected in sequence; and the fourth contact point access module that should be acted upon includes a third contact point that should be acted upon, a contact point input interface X3, a fourth resistor, a light-emitting diode DX3, and a fourth phototransistor that are connected in sequence. The action contact access module includes a fourth actionable input contact, an actionable input interface X4, a fifth resistor, a light-emitting diode DX4 and a fifth phototransistor connected in sequence; the non-actionable contact access area module includes a non-actionable access interface module, a first resistor, a light-emitting diode DM1 and a first phototransistor connected in sequence; the non-actionable contact access interface module includes a first non-actionable access interface module composed of a first non-actionable input contact connected to a non-actionable input interface M1, a second non-actionable access interface module composed of a second non-actionable input contact connected to a non-actionable input interface M2, and a third non-actionable access interface module composed of a third non-actionable input contact connected to a non-actionable input interface M3; the first, second and third non-actionable access interface modules are commonly connected in sequence to the first resistor, the light-emitting diode DM1 and the first phototransistor.
[0049] The access area includes an access common terminal module, a contact output module that should be operated, and a contact output module that should not be operated. In the access common terminal module, the access common terminal interface COM is connected to the access common terminal contact; the contact output module that should be operated includes a first contact access module composed of a switch K1, an output interface Y1 and a first output contact that should be operated, a second contact access module composed of a switch K2, an output interface Y2 and a second output contact that should be operated, a third contact access module composed of a switch K3, an output interface Y3 connected to a third output contact that should be operated, and a fourth contact access module composed of a switch K4, an output interface Y4 and a fourth output contact that should be operated; the contact output module that should not be operated includes a switch KN1, an output interface N1 that should not be operated, and an output contact that should not be operated.
[0050] The junction box is provided with jacks corresponding to the contacts of each module of the programmable logic controller in the junction box.
[0051] A third aspect of the technical solution of the present invention provides a wiring method for a relay protection device action contact test junction box and a wiring system, such as Figure 4 As shown, the method includes:
[0052] In the secondary return safety measure, i.e. removing the negative terminal of the operating power supply of the output tripping circuit of the relay protection device, choose to test using potential contacts or dry contacts.
[0053] According to the actual situation, the potential contact or the dry contact connected to the junction box is selected through the conversion switch. For example, when testing whether the relay protection action node is closed through the potential of the hard pressure plate in front of the relay protection screen to be tested, the switch input terminal of the existing relay protection tester cannot adapt to the access of the potential contact. At this time, the junction box can convert the potential contact into a dry contact and then connect it to the relay protection tester.
[0054] If dry contacts are used, turn the conversion switch to dry contact 1, connect the common terminal of the relay protection device to be tested to the access common terminal contact point, and respectively connect the contacts to be tested of the relay protection device to be tested to the contact access area that should be operated and the contact access area that should not be operated; connect the output common terminal contact point to the access common terminal of the relay protection tester, connect each contact in the contact output module that should be operated and the contact output module that should not be operated to the input terminal of the relay protection tester, and then start the test.
[0055] If potential contacts are used, turn the conversion switch to potential contact 2, connect the common terminal of the relay protection device to be tested to the access common terminal connection point, and connect the contacts to be tested of the relay protection device to be tested to the contact access area that should be operated and the contact access area that should not be operated respectively; connect the output common terminal connection point to the ground terminal of the relay protection tester, connect each contact in the contact output module that should be operated and the contact output module that should not be operated to the input terminal of the relay protection tester, and then start the test.
[0056] A relay protection device action contact test junction box, wiring system and method provided in the embodiments of the present invention can, on the one hand, select access to potential contacts or dry contacts through a conversion switch, that is, the access area and the access area can adapt to both the protection action contact test mode of the potential contact method and the protection action contact test mode of the dry contact method; on the other hand, the protection contacts that should be operated and the protection contacts that should not be operated are accessed in partitions, and the protection contacts that should not be operated ultimately output only a unique contact to the relay protection tester through XOR logic, thereby solving the problem of insufficient access ports of the relay protection tester.
[0057] The above contents are further detailed descriptions of the present invention in combination with specific preferred embodiments, and it cannot be determined that the specific implementation of the present invention is limited to these descriptions. For ordinary technicians in the technical field to which the present invention belongs, several simple deductions or substitutions can be made without departing from the concept of the present invention, which should be regarded as falling within the protection scope of the present invention.
Claims
1. A relay protection device action contact test junction box, wherein a programmable logic controller is arranged in the junction box, characterized in that: The programmable logic controller comprises a sequentially connected conversion switch module capable of selecting a potential contact test or a dry contact test, an access area for accessing the contacts of a relay protection device, and an access area for connecting a relay protection tester.
2. A relay protection device action contact test junction box according to claim 1, characterized in that: The conversion switch QF in the conversion switch module includes a dry contact 1 and a potential contact 2, wherein the dry contact 1 is connected to the output interface M of the AC / DC conversion module, and the potential contact 2 is connected to the common terminal interface S / S.
3. A relay protection device action contact test junction box according to claim 1, characterized in that: The access area includes an access common terminal module, a contact access area module that should be operated, and a contact access area module that should not be operated; the access common terminal module includes an access common terminal contact and an access common terminal interface S / S; the contact access area module that should be operated includes a plurality of contact access modules that should be operated; the contact access area module that should not be operated includes a plurality of access interface modules that should not be operated, a first resistor, a light emitting diode DM1, and a first phototransistor that are sequentially connected; The output area includes an output common terminal module, a contact output module that should be operated, and a contact output module that should not be operated; the output common terminal interface COM in the output common terminal module is connected to the output common terminal contact; the output contact module that should be operated includes a plurality of output contact modules that should be operated; the output contact module that should not be operated includes a switch KN1, an output interface N1 that should not be operated, and an output contact that should not be operated; The junction box is provided with jacks corresponding to the contacts of each module in the junction box.
4. A relay protection device action contact test junction box according to claim 3, characterized in that: The number of the responsive contact access modules and responsive contact output modules is preferably 4; the number of the non-responsive access interface modules is preferably 3.
5. A relay protection device action contact test wiring system, characterized in that: The test wiring system comprises a relay protection screen to be tested for providing contacts to be tested, a junction box and a relay protection tester for testing the contacts to be tested.
6. A relay protection device action contact test wiring system according to claim 5, characterized in that: The programmable logic controller arranged in the junction box comprises a sequentially connected conversion switch module capable of selecting potential contact test or dry contact test, an access area for accessing the contacts of the relay protection device and an access area for connecting the relay protection tester.
7. A relay protection device action contact test wiring system according to claim 5, characterized in that: The conversion switch QF in the conversion switch module includes a dry contact 1 and a potential contact 2, wherein the dry contact 1 is connected to the output interface M of the AC / DC conversion module, and the potential contact 2 is connected to the common terminal interface S / S.
8. A relay protection device action contact test wiring system according to claim 5, characterized in that: The access area includes an access common terminal module, a contact access area module that should be operated, and a contact access area module that should not be operated; the access common terminal module includes an access common terminal contact and an access common terminal interface S / S; the contact access area module that should be operated includes a plurality of contact access modules that should be operated; the contact access area module that should not be operated includes a plurality of access interface modules that should not be operated, a first resistor, a light emitting diode DM1, and a first phototransistor that are sequentially connected; The output area includes an output common terminal module, a contact output module that should be operated, and a contact output module that should not be operated; the output common terminal interface COM in the output common terminal module is connected to the output common terminal contact; the output contact module that should be operated includes a plurality of output contact modules that should be operated; the output contact module that should not be operated includes a switch KN1, an output interface N1 that should not be operated, and an output contact that should not be operated; The junction box is provided with jacks corresponding to the contacts of each module in the junction box.
9. A relay protection device action contact test wiring system according to claim 8, characterized in that: The number of the responsive contact access modules and responsive contact output modules is preferably 4; the number of the non-responsive access interface modules is preferably 3.
10. A wiring method for a relay protection device action contact test junction box and a wiring system according to any one of claims 1 to 9, characterized in that: The wiring method comprises: After the secondary return safety measures, choose to test using potential contacts or dry contacts; If dry contacts are used, turn the switch to dry contact 1, connect the common terminal of the relay protection device to be tested to the access common terminal, and connect the contacts to be tested of the relay protection device to the contact access area that should be operated and the contact access area that should not be operated respectively; connect the output common terminal to the access common terminal of the relay protection tester, and connect the contacts in the output module of the contact that should be operated and the output module of the contact that should not be operated to the input terminals of the relay protection tester; If potential contacts are used, turn the conversion switch to potential contact 2, connect the common terminal of the relay protection device to be tested to the access common terminal connection point, and connect the contacts to be tested of the relay protection device to be tested to the contact access area that should be operated and the contact access area that should not be operated respectively; connect the output common terminal connection point to the ground terminal of the relay protection tester, and connect each contact in the contact output module to be operated and the contact output module that should not be operated to the input terminal of the relay protection tester.