CN117109894A - Test system for mechanical characteristic test of trolley breaker - Google Patents
Test system for mechanical characteristic test of trolley breaker Download PDFInfo
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- CN117109894A CN117109894A CN202311034501.7A CN202311034501A CN117109894A CN 117109894 A CN117109894 A CN 117109894A CN 202311034501 A CN202311034501 A CN 202311034501A CN 117109894 A CN117109894 A CN 117109894A
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- 238000004146 energy storage Methods 0.000 claims abstract description 58
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01M—TESTING STATIC OR DYNAMIC BALANCE OF MACHINES OR STRUCTURES; TESTING OF STRUCTURES OR APPARATUS, NOT OTHERWISE PROVIDED FOR
- G01M13/00—Testing of machine parts
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
- G01R31/00—Arrangements for testing electric properties; Arrangements for locating electric faults; Arrangements for electrical testing characterised by what is being tested not provided for elsewhere
- G01R31/327—Testing of circuit interrupters, switches or circuit-breakers
- G01R31/3271—Testing of circuit interrupters, switches or circuit-breakers of high voltage or medium voltage devices
- G01R31/3272—Apparatus, systems or circuits therefor
- G01R31/3274—Details related to measuring, e.g. sensing, displaying or computing; Measuring of variables related to the contact pieces, e.g. wear, position or resistance
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Abstract
A test system for mechanical property test of a trolley breaker comprises the trolley breaker, a mechanical property auxiliary measuring device, a switching property tester and an aviation female plug matched with an aviation plug; the mechanical characteristic auxiliary measuring device is used for automatically identifying each functional terminal pair of the trolley breaker according to a configured program after each device in the test system is connected and electrified; the functional terminal pairs comprise a brake-separating terminal pair, a brake-closing terminal pair, an energy storage control terminal pair, a locking-releasing terminal pair and signal loop terminal pairs; the switching characteristic tester is used for switching on or switching off corresponding functional terminal pairs according to a test item to be executed after the mechanical characteristic auxiliary measuring device determines each functional terminal pair of the current trolley breaker, and sending a direct current pulse signal corresponding to the test item so as to complete the mechanical characteristic test of the trolley breaker by controlling the opening and closing operation of the trolley breaker. The scheme can save human resources and improve the safety of operators.
Description
Technical Field
The invention relates to the technical field of operation and maintenance of power grids, in particular to a test system for mechanical characteristics of a trolley breaker.
Background
According to the requirements of the standard regulations of electric power tests, the electric connection and routine tests of the trolley type vacuum circuit breaker of the 10KV switch cabinet are required to be carried out frequently. During the test, the trolley circuit breaker is in an overhauling state, the secondary aviation plug of the circuit breaker is pulled out from the switch cabinet, the circuit breaker is in a power-off state, and the switching-on and switching-off control loop of the circuit breaker is also powered off.
When the mechanical property test of the circuit breaker is carried out, terminals such as opening, closing, energy storage and the like corresponding to the type of the circuit breaker are needed to be found manually. After the corresponding terminal is found, a tester is required to hold the test shorting tab or the contact pin contact terminal by special hands, the other end of the test tab is connected to the opening and closing output terminal on the circuit breaker action comprehensive tester, and the other tester is required to operate the instrument to provide a direct current pulse power supply to control the circuit breaker to realize opening and closing operation so as to test the mechanical characteristics of the circuit breaker. The instrument direct current output power switch is pressed by hand during energy storage to supply power for the energy storage motor until the spring mechanism finishes energy storage, and sometimes the energy storage terminal cannot be found, and manual mechanical energy storage is also needed. In addition, if the breaker itself has a closing lock, a test person needs to be added to release the closing lock by manpower. Therefore, the mechanical characteristic test of the trolley breaker is usually carried out by a plurality of people, and then a worker responsible person or a specialized guardian is calculated, so that a great deal of labor is consumed, and the high-voltage distribution room overhauls the working space to work crowded due to more people, so that a certain potential safety hazard is caused.
Disclosure of Invention
In view of the above, there is a need for a test system for testing mechanical characteristics of a trolley breaker that saves human resources and improves safety of workers.
The embodiment of the invention provides a test system for mechanical property test of a trolley breaker, which comprises the following components: the device comprises a trolley breaker, a mechanical characteristic auxiliary measuring device, a switching characteristic tester and an aviation female plug matched with an aviation plug on the trolley breaker;
one end of the female plug of the aviation female plug is inserted into the aviation plug of the trolley breaker for butt joint, the other end of the aviation female plug is connected to the mechanical property auxiliary measuring device, the interfaces of the opening, closing and public ends on the switching property tester are connected with the corresponding interfaces of the mechanical property auxiliary measuring device through cables, the phase A, the phase B and the phase C on the switching characteristic tester are respectively connected to the upper contacts of the phase A, the phase B and the phase C of the trolley breaker, and the lower contacts of A, B, C three phases of the trolley breaker are connected to a common end on the switching characteristic tester after being in short circuit, so that a test loop for testing the mechanical characteristics of the trolley breaker is formed;
the mechanical characteristic auxiliary measuring device is used for automatically identifying each functional terminal pair of the trolley breaker according to a pre-configured program after each device in the test system is connected and electrified; wherein, the functional terminal includes: a brake-off terminal pair, a brake-on terminal pair, an energy storage control terminal pair, a lock-off releasing terminal pair and signal loop terminal pairs; the switching characteristic tester is used for switching on or switching off corresponding functional terminal pairs according to a test item to be executed after the mechanical characteristic auxiliary measuring device determines the functional terminal pairs of the current trolley breaker, and sending a direct current pulse signal corresponding to the test item so as to complete the mechanical characteristic test of the trolley breaker by controlling the opening and closing operation of the trolley breaker.
Preferably, the mechanical property auxiliary measuring device is configured to perform the following steps when determining each functional terminal pair of the trolley breaker:
step 1: selecting a reference terminal (X, Y) from a plurality of functional terminals; wherein, (X, Y) is used for representing that the current reference terminal is a Y-th functional terminal of an X-th column in the functional terminals of the aviation plug;
step 2: forming terminals (X-1, Y-1), (X-1, Y), (X-1, Y+1), (X, Y-1), (X, Y+1), (X+1, Y-1), (X+1, Y), (X+1, Y+1) to be paired with the terminals adjacent to the bit line or adjacent to the bit line, respectively; wherein, when X-1 is 0, X-1 automatically becomes the maximum column number; when X+1 is greater than the maximum column number, X+1 automatically becomes the first column;
step 3: sequentially switching on the terminals to be paired and the reference terminal through a control relay, and determining the function of a terminal pair formed by the terminals to be paired and the reference terminal according to detection results of on-off detection and current detection;
step 4: and (3) reselecting a reference terminal according to a preset sequence, and circularly executing the steps 2 to 4 until all the functional terminals are traversed.
Preferably, the step 3 specifically includes:
s1: sequentially carrying out on-off identification on a functional terminal pair consisting of a reference terminal and each terminal to be paired; determining the terminal pair identified as on as a state terminal pair K1, and determining the terminal pair identified as off as a first incomplete off loop terminal pair K2, or a first complete high-resistance loop terminal pair K3;
s2: sequentially applying direct-current voltage to each terminal pair corresponding to the first incomplete disconnection loop terminal pair K2 and the first complete high-resistance loop terminal pair K3, and detecting current in a loop; if the current in the loop is detected to be 0, determining the corresponding terminal pair as a first incomplete disconnection loop terminal pair K2, and if the current in the loop is detected to be not 0, determining the corresponding terminal pair as a first complete high-resistance loop terminal pair K3; according to the detected current in the loop, respectively determining an energy storage control loop terminal pair K3A, a handcart test position locking control loop terminal pair K3B and a closing monitoring loop terminal pair K3C;
s3: the trolley breaker is subjected to energy storage through an energy storage control loop, and each terminal pair in the state terminal pair K1 is sequentially subjected to on-off identification after the energy storage is completed; determining the terminal pair identified as open as a non-stored-energy signal loop terminal pair K1B;
s4: on-off identification is carried out on each terminal pair in the first incomplete disconnection loop terminal pair K2, the terminal pair identified as being conducted is determined to be an stored-energy signal loop terminal pair K21B, and the terminal pair identified as being disconnected is determined to be a second incomplete disconnection loop terminal pair K22 or a second complete high-resistance loop terminal pair K23;
s5: sequentially applying direct-current voltage to each terminal pair corresponding to the second incomplete disconnection loop terminal pair K22 and the second complete high-resistance loop terminal pair K23, and detecting current in a loop; if the current in the loop is detected to be 0, determining to be a second incomplete disconnection loop terminal pair K22, and if the current in the loop is detected to be not 0, determining to be a second complete high-resistance loop terminal pair K23;
s6: applying direct current voltage to a handcart test position locking control loop terminal pair K3B, and detecting current in each loop corresponding to a second incomplete disconnection loop terminal pair K22; if the current is detected to be not 0, determining that the corresponding terminal pair is a jump monitoring loop terminal pair K22F or a closing control loop terminal pair K22G;
s7: a direct-current voltage is applied to any one terminal pair selected from the jump monitoring loop terminal pair K22F or the closing control loop terminal pair K22G so as to realize the closing operation of the circuit breaker; after the closing operation is finished, the terminal pair which is not determined in the state terminal pair K1 is subjected to on-off identification, the terminal pair which is identified as being conducted is determined to be a handcart test position signal loop terminal pair K1C, and the terminal pair which is identified as being disconnected is determined to be a brake-off signal loop terminal pair K1A;
s8: carrying out on-off identification on the second incomplete disconnection loop terminal pair K22, and determining the terminal pair identified as on as a closing signal loop terminal pair K22A;
s9: detecting the current of an undetermined terminal pair in the second incomplete disconnection loop terminal pair K22, and determining the terminal pair with the current which is detected to be not 0 in the loop as a brake-separating control loop terminal pair K22C;
s10: each other undetermined terminal pair is determined as an invalid terminal pair K20.
Preferably, in step S2, determining the energy storage control loop terminal pair K3A, the handcart test position locking control loop terminal pair K3B, and the closing monitoring loop terminal pair K3C according to the detected current in the loop includes:
if the detected current in the loop is between 200 mA and 300mA, determining a terminal pair as the energy storage control loop terminal pair K3A;
if the detected current in the loop is less than 50mA, determining that the terminal pair is the closed control loop terminal pair K3B at the test position of the handcart;
and if the detected current in the loop is between 0.5 and 1A, determining the terminal pair as the combination monitoring loop terminal pair K3C.
Preferably, a relay array is arranged in the mechanical property auxiliary measuring device, each jack in the aviation female plug is led to the relay array in the mechanical property auxiliary measuring device through a lead wire, and each jack corresponds to one micro relay in the relay array.
Preferably, the mechanical characteristic assisting measurement device controls disconnection of an invalid terminal pair other than each functional terminal pair after identifying each functional terminal pair.
Preferably, the mechanical characteristic auxiliary measuring device controls the conduction of each signal loop terminal pair in the whole test process after identifying each functional terminal pair, and correspondingly lights the indicator lights of each signal loop terminal pair on each device.
Preferably, the mechanical characteristic auxiliary measuring device is further used for switching on the identified energy storage control terminal pair after detecting the non-energy storage signal so as to realize the energy storage operation of the circuit breaker.
Preferably, after determining each functional terminal pair of the current breaker, the mechanical characteristic auxiliary measuring device matches and stores the model of the current breaker with the determined functional terminal pair for directly testing the breaker of the model next time.
According to the technical scheme, the mechanical characteristic test system of the trolley breaker provided by the embodiment of the invention can comprise the trolley breaker, the mechanical characteristic auxiliary measuring device, the switching characteristic tester and the aviation female plug matched with the aviation plug on the trolley breaker, and the mechanical characteristic auxiliary measuring device can automatically complete the identification of each functional terminal pair of the trolley breaker after being electrified, so that the switching characteristic tester can execute operations such as opening and closing according to the determined functional terminal pairs, and further complete the mechanical characteristic test of the trolley breaker. Therefore, the scheme does not need to search for the functional terminal pairs manually, and further the number of people for mechanical property testing can be reduced, and the efficiency of mechanical property testing can be improved while manpower is saved. In addition, based on this scheme, the tester can reduce with the contact of terminal and circuit, and personnel's quantity reduces moreover and makes high voltage distribution room can not crowded, and then can reduce the potential safety hazard when the tester carries out mechanical properties test.
Drawings
Fig. 1 is a schematic diagram of a test system for mechanical property test of a trolley breaker according to an embodiment of the present invention.
Fig. 2 is a schematic diagram of an aerial plug insert pin arrangement of a trolley breaker according to an embodiment of the present invention.
In the figure: the device comprises a trolley breaker 1, a mechanical characteristic auxiliary measuring device 2, a switching characteristic tester 3, an aviation plug 4 and an aviation female plug 5.
Detailed Description
In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings that are needed in the embodiments will be briefly described below, and it is obvious that the drawings in the following description are some embodiments of the present invention, and other drawings may be obtained according to these drawings without inventive effort for a person skilled in the art.
Referring to fig. 1, an embodiment of the present invention provides a mechanical characteristic test system for a trolley breaker 1, including: the device comprises a trolley breaker 1, a mechanical characteristic auxiliary measuring device 2, a switching characteristic tester 3 and an aviation female plug 5 matched with an aviation plug 4 on the trolley breaker 1;
the female plug end of the aviation female plug 5 is inserted into the aviation plug 4 of the trolley breaker 1 for butt joint, the other end of the aviation female plug 5 is connected to the mechanical property auxiliary measuring device 2, the interfaces of the opening, closing and public ends on the switching property tester 3 are connected with the corresponding interfaces of the mechanical property auxiliary measuring device 2 through cables, the A phase, the B phase and the C phase on the switching property tester 3 are respectively connected to the upper contacts of the A phase, the B phase and the C phase of the trolley breaker 1, the lower contacts of A, B, C three phases of the trolley breaker 1 are connected to the public ends on the switching property tester 3 after being short-circuited, and a test loop for testing the mechanical property of the trolley breaker 1 is formed;
the mechanical characteristic auxiliary measuring device 2 is used for automatically identifying each functional terminal pair of the trolley breaker 1 according to a pre-configured program after each device in the test system is connected and electrified; wherein, the functional terminal pair includes: a brake-off terminal pair, a brake-on terminal pair, an energy storage control terminal pair, a lock-off releasing terminal pair and signal loop terminal pairs; the switching characteristic tester 3 is configured to, after the mechanical characteristic auxiliary measurement device 2 determines each functional terminal pair of the current trolley breaker 1, switch on or off the corresponding functional terminal pair according to a test item to be executed, and send a dc pulse signal corresponding to the test item, so as to complete the mechanical characteristic test for the trolley breaker 1 by controlling the opening and closing operation of the trolley breaker 1.
In the embodiment of the invention, a mechanical characteristic auxiliary measuring device 2 is added between the output terminal of the switching characteristic tester 3 and the aviation plug 4 of the trolley breaker 1 and is matched with the switching characteristic tester 3 for use, so that the mechanical characteristic auxiliary measuring device 2 can automatically find out terminals such as opening, closing, energy storage, contact locking and the like according to a preset program after the connection is completed and the power is on. Further according to actual test demand, operation such as opening and closing can be realized by utilizing the corresponding terminals, and further mechanical characteristic test of the trolley breaker 1 is realized, and safety of operators can be improved while the manpower is saved to find the functional terminals.
In general, the functional terminal pairs of the breaker such as a breaking terminal, a closing terminal, an energy storage terminal, a locking releasing terminal, various signal terminals and the like all meet the design arrangement principle of 'adjacent columns and adjacent positions', as shown in fig. 2, the VS1 type vacuum breaker 58 core aviation plug pin functional arrangement is taken as an example, in the figure, the 25-35 terminal pair is an energy storage loop terminal, the 35 # terminal is a 1 st column and 6 th terminal, the 25 # terminal is a 2 nd column and 6 th terminal, the columns where the two terminals are located are adjacent, namely 'adjacent columns', and the special 1 st column and 5 th column are also regarded as adjacent columns. Meanwhile, the terminals 25 and 35 are the terminals 6, and are adjacent in position, namely, are called as 'adjacent in position'. For example, the number 25 terminals are adjacent to the "bit row" of the terminals, and there are 8 terminals 34, 35, 36, 24, 26, 53, empty and 54.
For example, the functional terminal pairs in fig. 2 are 45-47 and 24-34 respectively, 26-36 are non-stored signal terminal pairs, 25-35 are stored energy control terminal pairs, 4-14 are switch-on control terminal pairs, 2-14, 8-18, 23-33, 29-39 etc. are switch-off signal terminal pairs, 30-31 are switch-off control terminal pairs, 7-17, 3-13, 5-15, 9-19, 27-37 etc. are switch-on signal terminal pairs, 20-44 are contact-latch terminal pairs. Based on the above-described terminal pairs having the "principle of bit row adjacency, position adjacency", the mechanical property auxiliary measuring device, when determining each functional terminal pair of the trolley breaker, may be configured to perform the steps of:
step 1: selecting a reference terminal (X, Y) from a plurality of functional terminals; wherein, (X, Y) is used for representing that the current reference terminal is a Y-th functional terminal of an X-th column in the functional terminals of the aviation plug;
step 2: forming terminals (X-1, Y-1), (X-1, Y), (X-1, Y+1), (X, Y-1), (X, Y+1), (X+1, Y-1), (X+1, Y), (X+1, Y+1) to be paired with the terminals adjacent to the bit line or adjacent to the bit line, respectively; wherein, when X-1 is 0, X-1 automatically becomes the maximum column number; when X+1 is greater than the maximum column number, X+1 automatically becomes the first column;
step 3: sequentially switching on the terminals to be paired and the reference terminal through the control relay, and determining the function of a terminal pair formed by the terminals to be paired and the reference terminal according to detection results of on-off detection and current detection;
step 4: and (3) reselecting a reference terminal according to a preset sequence, and circularly executing the steps 2 to 4 until all the functional terminals are traversed.
In this embodiment, the relay is controlled to be turned on and powered for each terminal, and the functions of the terminal pairs are identified by on-off detection and current detection. Then selecting another reference terminal according to the sequence, and carrying out paired power supply identification according to the principle, wherein the identified terminal pair is not repeatedly identified, so as to improve the identification efficiency. The cycle is thus repeated, if the above operation has not found all terminal functions, then pairs of verification searches are sequentially performed in the remaining terminals until all terminal pairs of the desired function are found.
It should be noted that the aviation female plug may be provided with an image detector, which is used for detecting whether there are pins, the number of columns, etc. in the aviation female plug when the aviation female plug is in butt joint with the aviation plug, and the mechanical characteristic auxiliary measuring device assigns coordinates or numbers to each pin according to the detected result.
For the circuit breaker inner loop:
energy storage circuit: the motor micro-switch node is characterized in that the motor is a permanent magnet Direct Current (DC) speed reduction motor, and the rated voltage is DC220V; the micro switch node is a normally closed node, and the motor is disconnected from the energy storage loop after energy storage is completed, so that the motor is prevented from being burnt out and damaged when the power is continuously supplied in an energy storage state.
Considering that the circuit breaker has the anti-tripping function, according to the design principle, the anti-tripping loops are all connected in series in the closing loop and are in parallel connection with the closing coil. Anti-jump loop: the anti-jump relay fixes a normally open node of the auxiliary switch of the resistance breaker.
Considering that the circuit breaker has a locking function, according to the design principle, the locking loop is independent of the opening and closing loop, and only a pair of action nodes of the locking relay are connected in series in the closing loop. Locking circuit: the locking relay is used for fixing the normally closed node of the auxiliary switch of the resistor breaker, the normally closed node of the handcart test position and the normally open node of the working position.
Closing loop: the normally-closed action node of the anti-tripping relay, the normally-closed node of the auxiliary switch of the breaker, the normally-open action node of the locking relay, the normally-open node of the energy storage micro-switch and the closing coil. Therefore, the preconditions for the closing control terminal to close the power supply circuit breaker are as follows: the anti-tripping loop is not on, the breaker is opened, the locking loop is connected, and the stored energy and the closing coil are normal.
When the circuit breaker is in a breaking state, the normally open nodes connected in series in the anti-tripping loop are not connected, so that the anti-tripping relay does not act, and the normally closed nodes of the anti-tripping relay connected in series in the closing loop are always connected. Meanwhile, when the handcart is in the test position, the locking loop is connected. Therefore, only one condition that the closing loop is closed is limited on the premise that the handcart is at a test position and the circuit breaker is in a breaking state and the closing coil is complete, namely the circuit breaker is used for storing energy.
And (3) handcart position identification: the test position is also the working position, whether the handcart is further confirmed through a signal loop, and the handcart is defaults to the test position after being pulled out of the switch cabinet.
Based on the circuit inside the circuit breaker, step 3 may specifically include the following steps when determining the function of the terminal pair formed by each terminal to be paired and the reference terminal according to the detection results of the on-off detection and the current detection:
s1: sequentially carrying out on-off identification on a functional terminal pair consisting of a reference terminal and each terminal to be paired; determining the terminal pair identified as on as a state terminal pair K1, and determining the terminal pair identified as off as a first incomplete off loop terminal pair K2, or a first complete high-resistance loop terminal pair K3;
in this embodiment, the principle of on-off recognition is based on an on-off recognition circuit, in which a low-value resistor is used as a reference, and is generally 50-80 Ω. When the resistance in the loop is detected to be lower than the reference resistance, the circuit is identified as being turned on, and when the loop is detected to be not turned on or the resistance is detected to be higher than the reference resistance, the circuit is identified as being turned off. Thus, the power supply can be prevented from being burnt out by detecting without directly applying current.
There are three main situations for terminal pair K1 identified as conducting at this time: a brake-off signal loop terminal pair K1A, a non-energy-storage signal loop terminal pair K1B and a handcart test position signal loop terminal pair K1C;
the K2 comprises a part of inactive terminal pair K20 and a residual terminal pair K21 which are completely irrelevant to the loop function, wherein the K21 mainly comprises a closing signal loop terminal pair K21A, a stored energy signal loop terminal pair K21B, a handcart position signal loop terminal pair K21C, a jump monitoring loop terminal pair K21D, a closing control loop terminal pair K21E, a separating brake control loop terminal pair K21F, a handcart working position locking control loop terminal pair K21G and a grounding terminal pair K21H.
There are three situations for K3: the energy storage control loop K3A, the handcart test position locking control loop K3B and the closing monitoring loop K3C.
S2: sequentially applying direct-current voltage to each terminal pair corresponding to the first incomplete disconnection loop terminal pair K2 and the first complete high-resistance loop terminal pair K3, and detecting current in a loop; if the current in the loop is detected to be 0, determining the corresponding terminal pair as a first incomplete disconnection loop terminal pair K2, and if the current in the loop is detected to be not 0, determining the corresponding terminal pair as a first complete high-resistance loop terminal pair K3; according to the detected current in the loop, respectively determining an energy storage control loop terminal pair K3A, a handcart test position locking control loop terminal pair K3B and a closing monitoring loop terminal pair K3C;
in this embodiment, the dc voltage applied between the pair of terminals K2 and K3 is 110V, and since K2 is an open loop, the current is 0, and K3 is a complete high-resistance loop, and thus the current is not 0, based on which K2 and K3 can be distinguished.
Further, if the detected current in the loop is between 200 and 300mA, determining the terminal pair as an energy storage control loop terminal pair K3A; the power P of the energy storage motor is generally 90-120W, the rated voltage is DC220V, and the loop current in the energy storage process cannot exceed 1A.
If the detected current in the loop is less than 50mA, determining that the terminal pair is a handcart test position locking control loop terminal pair K3B; the locking loop can be electrified for a long time, and the coil is not burnt due to the fact that the resistance is large and the current is small, the resistance of the locking coil is generally more than 10 Kohm, and the current is in the level of 0.01A.
If the detected current in the loop is between 0.5 and 1A, determining the terminal pair as a closing monitoring loop terminal pair K3C, and connecting the closing monitoring loop in series with the brake separating coil without a breaker auxiliary switch.
After the terminal pair K3A of the energy storage control loop is determined, voltage is applied to the energy storage control loop through the terminal pair to carry out energy storage operation on the circuit breaker, and the circuit breaker is further identified after energy storage is completed.
Through the above steps, all terminal pairs k=k1+k2, k2=k20+k21+k3 are recorded at this time, the complete and valid terminal pair is k1+k21+k3, K3 has been identified as completed, and the next step is to distinguish K21. Note that K20 cannot be directly identified, and thus, after all valid terminal pairs are identified, the remaining terminal pairs are invalid terminal pairs.
S3: the trolley breaker is subjected to energy storage through an energy storage control loop, and each terminal pair in the state terminal pair K1 is sequentially subjected to on-off identification after the energy storage is completed; determining the terminal pair identified as open as a non-stored-energy signal loop terminal pair K1B;
s4: on-off identification is carried out on each terminal pair in the first incomplete disconnection loop terminal pair K2, the terminal pair identified as being conducted is determined to be an stored-energy signal loop terminal pair K21B, and the terminal pair identified as being disconnected is determined to be a second incomplete disconnection loop terminal pair K22 or a second complete high-resistance loop terminal pair K23;
in this embodiment, because of the energy storage operation completed above, when the first incomplete loop terminal pair K2 is identified as being on or off, the stored energy signal loop terminal pair K21B is in a conductive state.
At this time, there are mainly two types of terminal pairs identified as open: the first incomplete disconnection loop terminal pair K22 and the second complete high-resistance loop terminal pair K23; wherein, K22 includes invalid terminal pair K20 and valid terminal pair, and valid terminal pair includes: a closing signal loop terminal pair K22A, a handcart working position signal loop terminal pair K22B, a separating brake control loop terminal pair K22C, a handcart working position locking control loop terminal pair K22D and a grounding terminal pair K22E. In addition, when no latch exists in the loop, a skip monitor loop terminal pair K22F and a closing control loop terminal pair K22G are also included.
In the case that K23 has a tripping monitoring loop K23A and a closing control loop K23B, the premise that K23 appears is that a circuit breaker has closing locking, so that whether the circuit breaker has closing locking can be reversely pushed according to K23.
S5: sequentially applying direct-current voltage to each terminal pair corresponding to the second incomplete disconnection loop terminal pair K22 and the second complete high-resistance loop terminal pair K23, and detecting current in the loop; if the current in the loop is detected to be 0, determining to be a second incomplete disconnection loop terminal pair K22, and if the current in the loop is detected to be not 0, determining to be a second complete high-resistance loop terminal pair K23;
in this embodiment, the pair of terminals of K23 may be selected as the pair of closing control terminals.
S6: applying direct current voltage to a handcart test position locking control loop terminal pair K3B, and detecting current in each loop corresponding to a second incomplete disconnection loop terminal pair K22; if the current is detected to be not 0, determining that the corresponding terminal pair is a jump monitoring loop terminal pair K22F or a closing control loop terminal pair K22G;
in this embodiment, the skip monitoring loop terminal pair K22F and the closing control loop terminal pair K22G may be used for closing control.
S7: a direct-current voltage is applied to any one terminal pair selected from the jump monitoring loop terminal pair K22F or the closing control loop terminal pair K22G so as to realize the closing operation of the circuit breaker; after the closing operation is finished, the terminal pair which is not determined in the state terminal pair K1 is subjected to on-off identification, the terminal pair which is identified as being conducted is determined to be a handcart test position signal loop terminal pair K1C, and the terminal pair which is identified as being disconnected is determined to be a brake-off signal loop terminal pair K1A;
in this embodiment, after the closing operation of the circuit breaker is completed, the circuit breaker state becomes "test position, closing, no energy storage".
S8: carrying out on-off identification on the second incomplete disconnection loop terminal pair K22, and determining the terminal pair identified as on as a closing signal loop terminal pair K22A;
s9: detecting the current of an undetermined terminal pair in the second incomplete disconnection loop terminal pair K22, and determining the terminal pair with the current which is detected to be not 0 in the loop as a brake-separating control loop terminal pair K22C;
s10: each other undetermined terminal pair is determined as an invalid terminal pair K20.
In this embodiment, the current is 0 terminal pair and there are three types: the first is an invalid terminal, the second is a grounding terminal, the third is a handcart working position signal terminal and a locking terminal, and the handcart is always in a test position when in a test, so the terminal related to the handcart working position is also regarded as an invalid terminal, and therefore, only a pair of grounding terminals are left to be indeterminate at last, and the grounding terminal does not play a role in the whole test process, so the terminal is also regarded as an invalid terminal.
In this way, the identified loop terminal pair corresponds to the terminal number of the aviation plug itself, and the function table of the aviation plug terminal of the circuit breaker is obtained.
In one embodiment, the mechanical property auxiliary measuring device is internally provided with a relay array, each jack in the aviation female plug is led to the relay array in the mechanical property auxiliary measuring device through a lead wire, and each jack corresponds to one micro relay in the relay array. After the aviation female plug and the circuit breaker aviation plug are in butt joint, the corresponding terminals are connected or disconnected according to the requirements, so that control operation is realized. Meanwhile, the mechanical property auxiliary measuring device controls the disconnection of the invalid terminal pair other than each functional terminal pair after identifying each functional terminal pair, so as to prevent the occurrence of logic errors.
In one embodiment, the mechanical property auxiliary measuring device controls the conduction of each signal loop terminal pair in the whole test process after identifying each functional terminal pair, and correspondingly lights the indicator lights of each signal loop terminal pair on each device. When the breaker is in the state of 'test position, brake opening and stored energy', the test position lamp is on, the brake opening indicator lamp is on, and the stored energy indicator lamp is on.
Further, the mechanical characteristic auxiliary measuring device is also used for switching on the identified energy storage control terminal pair after detecting the non-energy storage signal so as to realize the energy storage operation of the circuit breaker. That is, the action conditions of the automatic energy storage of the circuit breaker are as follows: and as long as the non-energy-storage signal is detected, switching on a DC220V power supply with preset duration to store energy according to the identified energy-storage control terminal. Therefore, the automatic energy storage can be realized, the manual energy storage is avoided, and the potential safety hazard of operators is reduced while the manpower is saved.
Further, according to the identified closed loop terminal pair, the closed loop terminal is always connected in the whole test process, and a direct current power supply is applied, so that the closed relay is always electrified to act, and the contact is closed and locked.
It should be noted that the mechanical characteristic auxiliary measuring device and the switch characteristic tester are respectively provided with a corresponding display screen, a terminal interface, a power interface, an indicator lamp and the like.
The test system for the mechanical characteristic test of the trolley breaker provided by the invention at least can comprise the following beneficial effects:
1) The plug connector is matched with the aviation plug of the handcart breaker through the female plug connector to complete butt joint, so that the contact terminal of a tool is fundamentally prevented from being used manually, and the potential safety hazard of operators is reduced while the manpower is saved.
2) The circuit breaker is always contacted with the closing lock in the mechanical characteristic test process of the circuit breaker, so that the number of people in the mechanical characteristic test is greatly reduced, the mechanical characteristic test efficiency is improved, and the potential safety hazard of operators is reduced.
3) The mechanical characteristic auxiliary measuring device automatically realizes the searching of each functional terminal pair, does not need to manually check an electrical schematic diagram or check on site, and can save a great deal of time.
4) At present, the control is realized by using test shorting bars and crocodile clips to contact with pins in aviation plugs, however, because the distance between the pins in the secondary aviation plugs of the circuit breaker is smaller, the problem of terminal false collision often occurs in the contact process. The scheme can avoid the problem of terminal miscollision by utilizing the aviation plug of the circuit breaker and the aviation female plug for docking.
The modules or units in the device of the embodiment of the invention can be combined, divided and deleted according to actual needs. The foregoing disclosure is illustrative of the preferred embodiments of the present invention, and is not to be construed as limiting the scope of the invention, as it is understood by those skilled in the art that all or part of the above-described embodiments may be practiced with equivalents thereof, which fall within the scope of the invention as defined by the appended claims.
Claims (9)
1. A test system for testing mechanical characteristics of a trolley circuit breaker, comprising: the device comprises a trolley breaker, a mechanical characteristic auxiliary measuring device, a switching characteristic tester and an aviation female plug matched with an aviation plug on the trolley breaker;
one end of the female plug of the aviation female plug is inserted into the aviation plug of the trolley breaker for butt joint, the other end of the aviation female plug is connected to the mechanical property auxiliary measuring device, the interfaces of the opening, closing and public ends on the switching property tester are connected with the corresponding interfaces of the mechanical property auxiliary measuring device through cables, the phase A, the phase B and the phase C on the switching characteristic tester are respectively connected to the upper contacts of the phase A, the phase B and the phase C of the trolley breaker, and the lower contacts of A, B, C three phases of the trolley breaker are connected to a common end on the switching characteristic tester after being in short circuit, so that a test loop for testing the mechanical characteristics of the trolley breaker is formed;
the mechanical characteristic auxiliary measuring device is used for automatically identifying each functional terminal pair of the trolley breaker according to a pre-configured program after each device in the test system is connected and electrified; wherein, the functional terminal pair includes: a brake-off terminal pair, a brake-on terminal pair, an energy storage control terminal pair, a lock-off releasing terminal pair and signal loop terminal pairs; the switching characteristic tester is used for switching on or switching off corresponding functional terminal pairs according to a test item to be executed after the mechanical characteristic auxiliary measuring device determines the functional terminal pairs of the current trolley breaker, and sending a direct current pulse signal corresponding to the test item so as to complete the mechanical characteristic test of the trolley breaker by controlling the opening and closing operation of the trolley breaker.
2. The cart breaker mechanical property test system of claim 1, wherein the mechanical property auxiliary measurement device, when determining each functional terminal pair of the cart breaker, is configured to perform the steps of:
step 1: selecting a reference terminal (X, Y) from a plurality of functional terminals; wherein, (X, Y) is used for representing that the current reference terminal is a Y-th functional terminal of an X-th column in the functional terminals of the aviation plug;
step 2: forming terminals (X-1, Y-1), (X-1, Y), (X-1, Y+1), (X, Y-1), (X, Y+1), (X+1, Y-1), (X+1, Y), (X+1, Y+1) to be paired with the terminals adjacent to the bit line or adjacent to the bit line, respectively; wherein, when X-1 is 0, X-1 automatically becomes the maximum column number; when X+1 is greater than the maximum column number, X+1 automatically becomes the first column;
step 3: sequentially switching on the terminals to be paired and the reference terminal through a control relay, and determining the function of a terminal pair formed by the terminals to be paired and the reference terminal according to detection results of on-off detection and current detection;
step 4: and (3) reselecting a reference terminal according to a preset sequence, and circularly executing the steps 2 to 4 until all the functional terminals are traversed.
3. The mechanical property test system of the trolley breaker according to claim 2, wherein the step 3 specifically comprises:
s1: sequentially carrying out on-off identification on a functional terminal pair consisting of a reference terminal and each terminal to be paired; determining the terminal pair identified as on as a state terminal pair K1, and determining the terminal pair identified as off as a first incomplete off loop terminal pair K2, or a first complete high-resistance loop terminal pair K3;
s2: sequentially applying direct-current voltage to each terminal pair corresponding to the first incomplete disconnection loop terminal pair K2 and the first complete high-resistance loop terminal pair K3, and detecting current in a loop; if the current in the loop is detected to be 0, determining the corresponding terminal pair as a first incomplete disconnection loop terminal pair K2, and if the current in the loop is detected to be not 0, determining the corresponding terminal pair as a first complete high-resistance loop terminal pair K3; according to the detected current in the loop, respectively determining an energy storage control loop terminal pair K3A, a handcart test position locking control loop terminal pair K3B and a closing monitoring loop terminal pair K3C;
s3: the trolley breaker is subjected to energy storage through an energy storage control loop, and each terminal pair in the state terminal pair K1 is sequentially subjected to on-off identification after the energy storage is completed; determining the terminal pair identified as open as a non-stored-energy signal loop terminal pair K1B;
s4: on-off identification is carried out on each terminal pair in the first incomplete disconnection loop terminal pair K2, the terminal pair identified as being conducted is determined to be an stored-energy signal loop terminal pair K21B, and the terminal pair identified as being disconnected is determined to be a second incomplete disconnection loop terminal pair K22 or a second complete high-resistance loop terminal pair K23;
s5: sequentially applying direct-current voltage to each terminal pair corresponding to the second incomplete disconnection loop terminal pair K22 and the second complete high-resistance loop terminal pair K23, and detecting current in a loop; if the current in the loop is detected to be 0, determining to be a second incomplete disconnection loop terminal pair K22, and if the current in the loop is detected to be not 0, determining to be a second complete high-resistance loop terminal pair K23;
s6: applying direct current voltage to a handcart test position locking control loop terminal pair K3B, and detecting current in each loop corresponding to a second incomplete disconnection loop terminal pair K22; if the current is detected to be not 0, determining that the corresponding terminal pair is a jump monitoring loop terminal pair K22F or a closing control loop terminal pair K22G;
s7: a direct-current voltage is applied to any one terminal pair selected from the jump monitoring loop terminal pair K22F or the closing control loop terminal pair K22G so as to realize the closing operation of the circuit breaker; after the closing operation is finished, the terminal pair which is not determined in the state terminal pair K1 is subjected to on-off identification, the terminal pair which is identified as being conducted is determined to be a handcart test position signal loop terminal pair K1C, and the terminal pair which is identified as being disconnected is determined to be a brake-off signal loop terminal pair K1A;
s8: carrying out on-off identification on the second incomplete disconnection loop terminal pair K22, and determining the terminal pair identified as on as a closing signal loop terminal pair K22A;
s9: detecting the current of an undetermined terminal pair in the second incomplete disconnection loop terminal pair K22, and determining the terminal pair with the current which is detected to be not 0 in the loop as a brake-separating control loop terminal pair K22C;
s10: each other undetermined terminal pair is determined as an invalid terminal pair K20.
4. The mechanical property test system of a trolley breaker according to claim 3, wherein in step S2, determining the energy storage control loop terminal pair K3A, the trolley test position locking control loop terminal pair K3B, and the closing monitoring loop terminal pair K3C, respectively, based on the detected current in the loop, specifically comprises:
if the detected current in the loop is between 200 mA and 300mA, determining a terminal pair as the energy storage control loop terminal pair K3A;
if the detected current in the loop is less than 50mA, determining that the terminal pair is the closed control loop terminal pair K3B at the test position of the handcart;
and if the detected current in the loop is between 0.5 and 1A, determining the terminal pair as the combination monitoring loop terminal pair K3C.
5. The test system of claim 1, wherein a relay array is provided in the auxiliary mechanical property measuring device, each jack in the aerial female plug is led to the relay array in the auxiliary mechanical property measuring device through a lead wire, and each jack corresponds to one micro relay in the relay array.
6. The cart breaker mechanical property test system of claim 1, wherein said mechanical property auxiliary measuring means controls the disconnection of inactive terminal pairs other than each functional terminal pair after each functional terminal pair is identified.
7. The mechanical property test system of the trolley breaker according to claim 6, wherein the mechanical property auxiliary measuring device controls the conduction of each signal loop terminal pair in the whole test process after identifying each functional terminal pair, and correspondingly lights the indicator lights of each signal loop terminal pair on each device.
8. The cart breaker mechanical property test system of claim 7, wherein said mechanical property auxiliary measurement means is further adapted to switch on the identified energy storage control terminal pair upon detection of an un-stored energy signal to effect energy storage operation of the breaker.
9. The mechanical property test system of a trolley breaker according to any one of claims 1-8, wherein the mechanical property auxiliary measuring device, after determining each functional terminal pair of the current breaker, matches and stores the current breaker model and the determined functional terminal pair for directly testing the breaker of the model at the next time.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202311034501.7A CN117109894A (en) | 2023-08-16 | 2023-08-16 | Test system for mechanical characteristic test of trolley breaker |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202311034501.7A CN117109894A (en) | 2023-08-16 | 2023-08-16 | Test system for mechanical characteristic test of trolley breaker |
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| CN117109894A true CN117109894A (en) | 2023-11-24 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202311034501.7A Pending CN117109894A (en) | 2023-08-16 | 2023-08-16 | Test system for mechanical characteristic test of trolley breaker |
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| Country | Link |
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| CN (1) | CN117109894A (en) |
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- 2023-08-16 CN CN202311034501.7A patent/CN117109894A/en active Pending
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