JP2018147835A - Simulation breaker malfunction prevention device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a simulation breaker malfunction prevention device capable of avoiding generation of the concern that a power failure may occur even when verification of drawings or curing work is under lapse of memory in performance test of a simulation breaker to be performed under such a state as to be connected with a breaker trip circuit.SOLUTION: A simulation breaker malfunction prevention device 8 includes: a positive electrode line Pwith a toggle switch sprovided between terminals Tand T; a negative electrode line Nwith a toggle switch sinterlocking with the toggle switch sbetween terminals T, T; and voltage detection means 9-11 configured to detect and display each of voltages between terminals 9a, 9b, between terminals 10a, 10b and between terminals 11a, 11b.SELECTED DRAWING: Figure 3

Description

  The present invention relates to a simulated circuit breaker malfunction prevention device used for an operational test of a simulated circuit breaker that is connected to a circuit breaker trip circuit, and in particular, forgets confirmation of a drawing and curing work and uses a simulated circuit breaker. The present invention relates to a simulated circuit breaker malfunction prevention device that does not cause a power failure by mistake even when connected.

  In the actual interruption test performed after revising the trip circuit and closing circuit of the circuit breaker, if a power failure cannot be made, remove the short-circuit strip from the trip lock terminal connected to the trip coil and the closing coil, and then the circuit breaker trip circuit. The test is carried out with a simulated circuit breaker connected to. The connection of the simulated circuit breaker to the circuit breaker trip circuit needs to be cured so that it is not mistakenly connected to the circuit on the circuit breaker side by confirming in the drawing that no voltage is generated between the grounds. However, when a simulated circuit breaker is connected after forgetting to confirm such drawings and curing, there is a problem that a circuit breaker in operation is accidentally cut off to cause a power failure.

As a technique related to an operation test of a circuit breaker, for example, Patent Document 1 discloses an invention relating to a relay having a test function for a circuit breaker tripping circuit under the name “digital protection relay”.
In the invention described in Patent Document 1, the “opening / closing part” that opens and closes the current path and the connection destination of the first connection point to which the “opening / closing part” is connected are the second connection point and the third connection point. Of the end portions of the “switching portion” to be switched to any one of the “opening and closing portions”, the end portion on the opposite side of the end portion connected to the “switching portion” and the third connection point “ A "current detection unit" installed on the parallel current path for the "opening and closing unit" and a "control unit" that determines whether to stop or continue the soundness test based on the detection signal from the "current detection unit" It has a structure.
According to such a structure, the malfunction of the circuit breaker which may occur at the soundness confirmation test of the circuit breaker tripping circuit can be prevented.

Further, in Patent Document 2, an overcurrent cutoff function test of a circuit breaker for wiring can be carried out while supplying a load current under the name of “a circuit breaker uninterruptible testing apparatus and a method for uninterruptible testing”. An invention relating to an apparatus and a method thereof is disclosed.
The invention described in Patent Document 2 has a structure including a bypass circuit that supplies a load current from a distribution line to a load connected to the wiring circuit breaker when the wiring circuit breaker is interrupted.
According to such a structure, even if the circuit breaker is operated during the overcurrent circuit breaker function test of the circuit breaker, the load is supplied with current from the distribution line via the bypass circuit. Can prevent power outage.

Japanese Patent Application Laid-Open No. 2006-152663 JP 2011-154875 A

  In the invention described in Patent Document 1, since it is configured to determine the soundness of a predetermined circuit by detecting the current flowing through the opening and closing unit and the switching unit, about the terminal connected to the trip coil and the closing coil, There was a problem that the ground voltage could not be detected. Further, the present invention is used for testing an actual circuit breaker, and there is a problem that it cannot be applied to a test for a simulated circuit breaker.

  In the invention described in Patent Document 2, a power failure during the test of the circuit breaker for wiring can be prevented, but there is a problem that it is not possible to find deficiencies such as miswiring and drawing confirmation errors. .

  The present invention has been made in response to such a conventional situation, and in the operation test of the simulated circuit breaker performed in a state connected to the circuit breaker trip circuit, even when the confirmation of the drawings and the curing work are forgotten, It is an object of the present invention to provide a simulated circuit breaker malfunction prevention device that does not cause a power failure by mistake.

  In order to achieve the above object, according to a first aspect of the present invention, a positive first power line and a second power line are connected to the second power line via a first changeover switch and a second changeover switch, respectively. A circuit breaker trip circuit having a first trip lock terminal and a second trip lock terminal and a negative third power line and transmitting a trip signal to the circuit breaker, and sent to the trip coil terminal A trip coil that operates according to a trip signal, a closing coil that operates according to a closing signal sent to a closing coil terminal, a first toggle switch whose operation is controlled by the closing coil and the trip coil, and a trip coil and a closing coil A first control power line and a second control power line connected to each other via a trip coil terminal, the trip coil terminal being a first switching switch. And the first trip lock terminal, and the circuit breaker malfunction used for the operation test of the simulated circuit breaker in which the closing coil terminal is connected between the second changeover switch and the second trip lock terminal. And a positive line in which a second toggle switch is provided between the first terminal and the second terminal, and the second toggle switch between the third terminal and the fourth terminal. A negative line provided with a third toggle switch to be interlocked, and first to third voltage detecting means for detecting and displaying a voltage between two terminals. Is.

  In the simulated circuit breaker malfunction preventing apparatus having such a structure, when performing an operation test of the simulated circuit breaker connected to the circuit breaker trip circuit, the first terminal and the third power line are connected to the first power line and the third power line. The second terminal and the fourth terminal are connected to the first control power line and the second control power line, respectively, and the two terminals of the first voltage detecting means are connected to the positive line. Connect to the negative electrode line, ground one terminal of the second voltage detection means, connect the other terminal to the trip coil terminal, ground one terminal of the third voltage detection means, and connect the other terminal In the state connected to the closing coil terminal, the voltage detected by the first voltage detecting means to the third voltage detecting means is confirmed, so that the voltage is cut off before the voltage is applied to the control power line of the simulated circuit breaker. Vessel Tsu has the effect of defect is detected in the flop circuit and mock breaker wiring.

According to a second aspect of the present invention, in the first aspect, at least one of the first voltage detection means to the third voltage detection means is configured to detect a voltage between two terminals. And a display unit for displaying the voltage detected by this circuit.
In the simulated circuit breaker malfunction prevention device having such a structure, in addition to the operation of the first invention, the entire device is reduced in size and weight.

According to a third invention, in the first invention, at least one of the first voltage detection means to the third voltage detection means comprises a voltmeter that detects a voltage between two terminals. To do.
In this case, there is a merit that an effect similar to that of the first invention is exhibited by a simple structure.

  According to the first invention, there is no possibility of causing a power failure by mistake even when the simulated circuit breaker is connected after forgetting the confirmation of the drawings and the curing work.

  According to the second invention, in addition to the effects of the first invention, it is easy to carry and install, and there is an effect that a large space is not required for storage.

  According to the 3rd invention, in addition to the effect of the 1st invention, there exists an effect that manufacturing cost is reduced.

(A) And (b) is a circuit diagram which shows an example of a circuit breaker trip circuit and a simulation circuit breaker, respectively. It is a circuit diagram which shows the state with which the circuit breaker trip circuit and the simulation circuit breaker were connected. It is a circuit diagram which shows the Example of the simulation circuit breaker malfunction prevention apparatus which concerns on embodiment of this invention. It is a circuit diagram which shows the state by which the simulation circuit breaker malfunction prevention apparatus of FIG. 3 was connected to the circuit breaker trip circuit and the simulation circuit breaker. It is the flowchart which showed the procedure at the time of performing the operation test of a simulation circuit breaker using the simulation circuit breaker malfunction prevention apparatus of FIG.

  Since the simulated circuit breaker malfunction prevention device of the present invention is used for a simulated circuit breaker connected to a circuit breaker trip circuit, first, the circuit breaker trip circuit and the simulated circuit breaker will be described with reference to FIGS. 1 and 2. To do. FIG. 1A and FIG. 1B are examples of circuit diagrams of a circuit breaker trip circuit and a simulated circuit breaker, respectively. FIG. 2 is a circuit diagram showing a state in which the circuit breaker trip circuit and the simulated circuit breaker are connected.

As shown in FIG. 1A, the circuit breaker trip circuit 1 has a structure in which a circuit breaker 3, an automatic recovery device 4, a remote control panel 5, and a power receiving panel 6 are connected to a protective relay panel 2.
In the protective relay panel 2, the positive power line P ₀ is connected to the terminal T _1, and is connected to the terminal T ₂ through the make contacts a ₁ and a ₂ and the trip lock terminal tr ₁ . Further, the positive power line P ₁ is connected to the terminal T ₂ via the make contacts a ₃ , a ₄ , the changeover switches s ₁ , s ₂ and the trip lock terminal tr ₂ for the off-delay operation, and the break contact b _1. And make contacts a _{5 to} a ₇ , auxiliary relays R ₁ and R ₂ , changeover switches s ₁ and s _2, and a trip lock terminal tr ₃ are connected to a terminal T ₃ . The power line P ₁ and the auxiliary relay R ₁ are also connected via make contacts a ₃ and a ₄ provided in parallel with the break contact b ₁ and the make contacts a _{5 to} a ₇ .
Further, the negative power line N ₀ is connected to the terminal T ₄ via auxiliary relays R ₃ and R ₄ connected in parallel.

In the circuit breaker 3, a break contact b ₂ is connected to the negative power line N ₁ , and a terminal T ₅ is connected to the break contact b ₂ via an auxiliary relay R ₅ and a limit switch Ls _1. The terminal T ₆ is connected only through the limit switch Ls ₁ , and further the terminal T ₇ is connected through the auxiliary relay R ₆ and the limit switch Ls ₂ .
In the automatic recovery device 4, the terminal _{T 8} is connected make contact _{a 8} is, this make contact _{a 8,} make contact _{a 9,} via the switch _S 1, _{S 2} and trip lock pin tr ₄ pin T ₉ is connected, and terminal T ₁₀ is connected via make contact a ₁₀ , changeover switches s ₁ and s _2, and trip lock terminal tr ₅ .

The remote control panel 5 has terminals _{T 11, T 12} to the power line _{P 2} of the positive polarity through the switch _s 3, _{s 4} are connected respectively, the incoming panel 6, the positive polarity of the power line _{P 3} button switch s Terminals T ₁₃ and T ₁₄ are connected via ₅ and s ₆ , respectively.
The terminals T ₁ and T ₄ of the protective relay panel 2 are respectively connected to the terminals T ₈ and T ₉ of the automatic recovery device 4, and the terminal T ₂ is a terminal T ₅ of the circuit breaker 3 and a terminal of the remote control panel 5. T ₁₂ is connected to terminal T ₁₄ of power receiving panel 6, and terminal T ₃ is connected to terminal T ₆ of circuit breaker 3. Then, the terminal _{T 10} of the automatic recovery device 4 are connected to the terminal _{T 13} of the incoming panel 6 and terminal _{T 11} of the terminal _{T 7} and the remote control panel 5 of the circuit breaker 3.

As shown in FIG. 1 (b), the simulated breaker 7, the toggle switch s ₇ which is controlled the operation by the trip coil TC and closing coil CC is contact c ₁ and the contact point c ₂ is configured to switch the terminal T ₁₅ is connected to the control power line N ₂ having, in contact c ₁ is connected in parallel return timer TT and the trip coil TC, respectively, to the contact c _2, the operation timer CT and closing coil CC, respectively Connected in parallel. The trip coil TC is connected to a control power line P ₄ having a terminal T ₁₆ via a toggle switch s ₈ whose operation is controlled by a return timer TT, and the operation of the closing coil CC is controlled by an operation timer CT. Connected to the control power line P ₄ via the toggle switch s ₉ . Then, return timer TT is is connected to the trip coil terminals T _17, it is connected via a toggle switch s ₁₀ to control the power line P _4, together with the operation timer CT is connected to the closing coil terminal T _18, It is connected to the control power line P ₄ via the toggle switch s _11.
Furthermore, the control power line P ₄ is connected to the control power line N ₂ through the red light RL and the toggle switch s ₁₂ and the green lamp GL and toggle switch s ₁₃ respectively. Furthermore, although a code | symbol is abbreviate | omitted, a some pair of terminal is mutually connected via the some toggle switch by which operation | movement is controlled by the trip coil TC and the making coil CC.

When performing an operation test of the simulated circuit breaker 7, first, after removing the short-circuit strip from the trip lock terminals tr ₄ and tr _{5 of} the automatic recovery device 4, as shown in FIG. 2, the terminal T ₁₆ is connected to the power line P ₁ . The terminal T ₁₅ is connected to the power line N ₀ , the trip coil terminal T ₁₇ is connected between the changeover switch s ₂ and the trip lock terminal tr ₄ , and the closing coil terminal T ₁₈ is connected to the changeover switch s ₂ and the trip lock terminal. Connect during tr ₅ .

Next, the simulated circuit breaker malfunction prevention device of the present invention will be described with reference to FIGS. In this embodiment, it is assumed that voltages of “+55 V” and “−55 V” are applied to the power lines P ₁ and N ₀ , respectively.
FIG. 3 is a circuit diagram showing an example of a simulated circuit breaker malfunction prevention device of the present invention, and FIG. 4 is a circuit diagram showing a state in which the simulated circuit breaker malfunction prevention device of FIG. 3 is connected to a circuit breaker trip circuit and a simulated circuit breaker. FIG. FIG. 5 is a flowchart showing a procedure for performing an operation test of the simulated circuit breaker using the simulated circuit breaker malfunction preventing apparatus of FIG.
In addition, about the component shown in FIG.1 and FIG.2, the same code | symbol is attached | subjected and the description is abbreviate | omitted. Further, FIG. 3 shows a state in which the toggle switches s ₁₄ and s ₁₅ are “ON”.

As shown in FIG. 3, the simulated circuit breaker malfunction prevention device 8 of the present invention has a positive terminal P ₅ having a terminal T ₁₉ provided at one end and a terminal T ₂₀ provided at the other end via a toggle switch s _14. The terminal T ₂₁ is provided at one end and the negative line N ₃ having the terminal T ₂₂ provided at the other end is connected to the positive line P ₅ via the toggle switch s ₁₅ interlocked with the toggle switch s ₁₄ . a voltage detecting means 9 consisting of the circuit configured and voltage display unit so as to detect the voltage between the connected terminal 9b to the terminal 9a and a negative electrode line N ₃ (not shown), trip coil of the simulated circuit breaker 7 a voltage detecting means 10 consisting of the circuit configured and voltage display unit so as to detect the voltage between the connected terminals 10a and grounded terminal 10b to the terminal T ₁₇ (not shown), the simulated breaker 7 Input coil terminal T ₁₈ includes a circuit configured to detect a voltage between a terminal 11a connected to ₁₈ and a grounded terminal 11b, and a voltage detection means 11 including a voltage display unit (not shown).

A method of performing an operation test of the simulated circuit breaker 7 using the simulated circuit breaker malfunction prevention device 8 will be described with reference to FIG.
As shown in FIG. 5, first, in step S1, the short-circuit piece is removed from the trip lock terminals tr ₄ and tr ₅ of the automatic recovery device 4.
Next, in step S2, as shown in FIG. 4, respectively connect the terminals _{T 19} and the terminal _{T 21} of the simulated breaker lockout device 8 to the power line _{P 1} and the power line _{N 0.} In step S3, the voltage detecting means 10 of the automatic recovery device 4 of the change-over switch s ₂ and the trip lock pin tr simulated breaker lockout device 8 to the trip coil terminal T ₁₇ of the connected simulated breaker 7 between ₄ with connecting terminals 10a, voltage detection automatic recovery device 4 of the change-over switch s ₂ and the trip lock pin tr simulated breaker 7 connected between the _5-on coil terminals T ₁₈ simulated breaker lockout device 8 The terminal 11a of the means 11 is connected.
Furthermore, in step S4, the terminal T20 and the terminal 22 of the simulated circuit breaker malfunction prevention device 8 are connected to the simulated circuit breaker 7 with the toggle switches s ₁₄ and s ₁₅ of the simulated circuit breaker malfunction prevention device 8 both turned off. respectively connected to the terminal _{T 16} and _{T 15.}

In step S5, the trip coil terminal _{T 17} detected by the voltage detecting means 10, 11 to check the ground voltage of the closing coil terminal _{T 18.} At this stage, since the trip coil terminal T ₁₇ and the input coil terminal T ₁₈ is not connected to any electrically be power lines P _1, N _0, if the normal state, the ground voltage "0V" Should be. Therefore, when the voltage detection means 10 and 11 indicate other numerical values, it is suspected that the drawing has been mistakenly confirmed or the curing work has been forgotten. It is necessary to check for mistakes.

On the other hand, when the ground voltage is "0V" at step S6, it confirms the voltage between positive line P ₅ and negative electrode line N ₃ detected by the voltage detection means 9. Since the positive line P ₅ and the negative line N ₃ are connected to the power lines P ₁ and N ₀ in step S4, the voltage detection means 9 should indicate “110V” in a normal state. is there. Therefore, when the voltage detection means 9 indicates a value other than the above, it is suspected that the wiring is defective or wrong, so the operation test of the simulated circuit breaker 7 is interrupted and the circuit wiring state is confirmed. It is necessary to.

Voltage between positive line _{P 5} and negative electrode line _{N 3} is the case of "110V" in step S7, the toggle switch _{s 14, s 15} of the simulated breaker lockout device 8 to the state of "ON" ( The state shown in FIG. Thereby, since the control power lines P ₄ and N ₂ are electrically connected to the positive line P ₅ and the negative line N ₃ , their ground voltages are “+55 V” and “−55 V”, respectively. Further, when the toggle switch s ₇ is connected to the contact c ₁ , only the trip coil terminal T ₁₇ is electrically connected to the control power line N ₂ , so that the trip coil terminal T ₁₇ and the closing coil are connected. each ground voltage of the terminal _{T 18} is "-55V" and "0V". On the other hand, when the toggle switch s ₇ is connected to the contact c ₂ , only the closing coil terminal T ₁₈ is electrically connected to the control power line N ₂ , so that the trip coil terminal T ₁₇ and the closing coil are connected. each ground voltage of the terminal _{T 18} is "0V" and "-55V". Therefore, when the ground voltage of the trip coil terminal T ₁₇ and the input coil terminal T ₁₈ detected by the voltage detection means 10 and 11 shows other values, the operation test of the simulated circuit breaker 7 is interrupted, It is necessary to check the wiring status of the circuit.

In step S8, the selector switches s ₁ and s ₂ of the automatic recovery device 4 are operated and either one of the make contacts a ₈ and a ₉ is closed, and either the trip coil terminal T ₁₇ or the closing coil terminal T ₁₈ is connected to the power line. to connect to the P _0. In this case, the trip coil terminal _{T 17} one of the ground voltage of the input coil terminal _{T 18} becomes the "+ 55V". Therefore, when the ground voltage of the trip coil terminal T ₁₇ and the input coil terminal T ₁₈ detected by the voltage detection means 10 and 11 shows other values, the operation test of the simulated circuit breaker 7 is interrupted, It is necessary to check the wiring status of the circuit.

  As described above, according to the simulated circuit breaker malfunction prevention device of the present invention, a voltage is applied to the control power line of the simulated circuit breaker in the operation test of the simulated circuit breaker performed in a state connected to the circuit breaker trip circuit. In such a state, the circuit breaker trip circuit and the circuit breaker of the simulated circuit breaker are detected. Therefore, there is no possibility of causing a power outage accidentally even when the simulated circuit breaker is connected after forgetting the confirmation of the drawings and the curing work.

In addition, the simulation circuit breaker malfunction prevention apparatus of this invention is not limited to the structure shown in the Example. For example, instead of the circuit for detecting the voltage between the two terminals and the voltage display unit, a structure using a voltmeter as the voltage detection means 9 to 11 may be used. In this case, a simple structure, as with function of measuring the voltage and ground voltage trip coil terminal T ₁₇ and the input coil terminal T ₁₈ between the positive line P ₅ and negative electrode line N ₃ is in this embodiment exhibits Is done. Therefore, the manufacturing cost can be reduced. However, as in the present embodiment, when the voltage detection means 9 to 11 are configured by a circuit for detecting the voltage between both terminals and the voltage display unit, compared to the case where a voltmeter is used for the voltage detection means 9 to 11. Thus, since the simulated circuit breaker malfunction prevention device 8 is reduced in size and weight, there is an advantage that it is easy to carry and install and does not require a large space for storage.

  INDUSTRIAL APPLICABILITY The present invention can be used in an operation test of a simulated circuit breaker performed after revising the trip circuit and the closing circuit of the circuit breaker.

DESCRIPTION OF SYMBOLS 1 ... Circuit breaker trip circuit 2 ... Protection relay panel 3 ... Circuit breaker 4 ... Automatic recovery device 5 ... Remote control panel 6 ... Power receiving panel 7 ... Simulated circuit breaker 8 ... Simulated circuit breaker malfunction prevention device 9 ... Voltage detection means 9a, 9b ... terminal 10 ... voltage detection means 10a, 10b ... terminal 11 ... voltage detection means 11a, 11b ... terminal a ₁ ~a _{10 ...} make contact b _{1, b 2} break contact c _1, c 2 _... contacts s _{1, s 2} ... Changeover switch s ₃ , s ₄ ... switch s ₅ , s ₆ ... button switch s _{7 to} s ₁₅ ... toggle switch tr _{1 to} tr ₅ ... trip lock terminal CC ... closing coil CT ... operation timer GL ... green lamp Ls ₁ , Ls ₂ ... Limit switches P _{0 to} P ₃ ... Power line P ₄ ... Control power line P ₅ ... Positive line RL ... Red lamp N ₀ , N ₁ ... Power line N ₂ ... Control power line N ₃ ... Negative electrode wire T _{1 to} T ₁₆ ... Terminal T ₁₇ ... Trip coil terminal T ₁₈ ... Closing coil terminal T _{19 to} T ₂₂ ... Terminal TC ... Trip coil TT ... Return timer R _{1 to} R ₆ ... Auxiliary relay

Claims (3)

A positive first power line and a second power line;
A first trip lock terminal and a second trip lock terminal connected to the second power line via a first changeover switch and a second changeover switch, respectively;
A breaker trip circuit having a negative third power line and transmitting a trip signal to the breaker;
A trip coil that operates according to a trip signal sent to the trip coil terminal;
A closing coil that operates according to a closing signal sent to the closing coil terminal;
A first toggle switch whose operation is controlled by the closing coil and the trip coil,
A first control power line and a second control power line connected to each other via the trip coil and the closing coil,
The trip coil terminal is connected between the first changeover switch and the first triplock terminal, and the closing coil terminal is connected between the second changeover switch and the second triplock terminal. A simulated circuit breaker malfunction prevention device used for an operational test of a simulated circuit breaker,
A positive line provided with a second toggle switch between the first terminal and the second terminal;
A negative line provided with a third toggle switch interlocking with the second toggle switch between a third terminal and a fourth terminal;
A simulated circuit breaker malfunction prevention device, comprising: first voltage detection means to third voltage detection means for detecting and displaying a voltage between two terminals.   At least one of the first voltage detection means to the third voltage detection means includes a circuit configured to detect the voltage between the two terminals, and the voltage detected by the circuit. 2. The simulated circuit breaker malfunction prevention device according to claim 1, further comprising: a display unit that displays 2. The simulation according to claim 1, wherein at least one of the first voltage detection unit to the third voltage detection unit includes a voltmeter that detects the voltage between two terminals. Circuit breaker malfunction prevention device.

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