JP5358299B2 - Test terminal and electrical panel - Google Patents

Description

  The present invention relates to a test terminal incorporated in an electrical panel such as an automatic recovery device installed in an electric station such as a substation and used for a protective relay test, and an electrical panel equipped with the test terminal.

  Conventionally, in an electrical station such as a substation, for example, an automatic recovery device (ARE) is installed to automatically restore a circuit breaker that has been interrupted by turning on after a certain time has elapsed since the circuit breaker was shut down due to an accident. ing. The automatic recovery device is provided with a number of test terminals corresponding to the lines for testing the protective relay. The test terminals include an instrument transformer test terminal (PTT terminal) and an instrument current transformer test terminal (CTT terminal) that are incorporated into the transformer circuit and the current transformer circuit, respectively. For example, when the recovery function of the automatic recovery apparatus is not used (when the recovery function is stopped), the corresponding PTT plug is inserted into the plug insertion port of the PTT terminal, and the voltage is measured.

  When operating the PTT plug for the test, the worker looks at the nameplate on which the line name is displayed and confirms that the line does not use the recovery function. However, the worker may mistakenly recognize that the line is a line not using the recovery function even though it is a line using the recovery function, and may insert the PTT plug. In this case, the voltage loss is caused by inserting the PTT plug while the restoration function is used, and the sound line is erroneously cut off by the cut-off command.

  In the upper part of the automatic recovery device, the display of the recovery function use status / non-use status (43 switch display) is made, but since many test terminals are arranged in the lower part of the automatic recovery device, Confirmation is not easy and it is difficult to prevent misidentification.

  For this reason, a test terminal cover is attached to the plug insertion port of the test terminal to close the plug insertion port, and the test terminal cover is attached to the display board and the display board around the height direction (vertical direction in the attached state). It is composed of an outer frame that is rotatably supported and a leg for locking, displays `` Insert Prohibition '' on the surface of the display board, hides the back surface, and depending on whether or not the test plug can be inserted, A technique has been proposed in which a test terminal cover is attached with the front surface or back surface of the display panel facing the front side (external side) (see, for example, Patent Document 1).

JP 2007-171750 A

  However, in the above prior art, the operator determines whether or not to display the “prohibition of insertion”, and if the test terminal cover is removed, the test plug can be easily inserted into the plug insertion slot. It is difficult to completely eliminate human errors such as inserting a test plug while using the recovery function.

  An object of the present invention is to provide a test terminal and an electric panel that can solve the above-described problems and can reliably prevent erroneous operations.

In order to solve the above-mentioned problem, the invention of claim 1 is a test terminal provided in an electric panel having a predetermined function and used for a protective relay test, in which a corresponding test plug is inserted. An insertion that includes a plug insertion slot and closes the test plug insertion slot when the predetermined function is in use, and opens the test plug insertion slot when the predetermined function is not in use The opening / closing means includes a movable member capable of opening / closing the test plug insertion opening and being attracted by magnetic attraction, and a suction means for attracting the movable member when energized. And an open / close switch connected in series to the suction means, and when the open / close switch is operated when the predetermined function is not in use, the suction means is excited. Is, the movable member is attracted, the test plug insertion port is configured to be opened, when the predetermined function of use, the suction means is an excitation disabled state, said movable member by its own weight The test plug insertion slot is closed, and the movable member is manually displaceable .

  In the invention of claim 1, the insertion port opening / closing means closes the test plug insertion port when the predetermined function of the electric panel is in use, and opens the test plug insertion port when the predetermined function is not in use. Open.

  A second aspect of the present invention is the test terminal according to the first aspect, wherein the electrical panel has an automatic recovery function for automatically recovering a shut-off device after a predetermined time, and the insertion port opening / closing means The test plug insertion slot is closed when the automatic recovery function is in use, and the test plug insertion slot is opened when the automatic recovery function is not in use.

  A third aspect of the present invention is the test terminal according to the first or second aspect, wherein the test terminal is disposed in the vicinity of the test plug insertion port and indicates a use state and / or a non-use state of the predetermined function. It is characterized by having means.

The invention of claim 4 is an electric board having a predetermined function and provided with a test terminal used for a protective relay test, wherein the test terminal is inserted with a corresponding test plug. An opening / closing opening that closes the test plug insertion port when the predetermined function is in use and opens the test plug insertion port when the predetermined function is not in use The insertion port opening / closing means opens and closes the test plug insertion port and can be attracted by a magnetic attractive force; and a suction means that attracts the movable member when excited. An opening / closing switch connected in series to the suction means, and when the opening / closing switch is operated when the predetermined function is not in use, the suction means is excited. The movable member is sucked and the test plug insertion opening is opened, and when the predetermined function is in use, the suction means is in an unexcitable state, and the movable member falls by its own weight. The test plug insertion port is closed, and the movable member can be manually displaced .

According to the invention of claim 1, the insertion port opening / closing means closes the test plug insertion port when the predetermined function of the electric panel is in use, prevents the test plug from being inserted, and the predetermined function is not used. Since the test plug insertion slot is opened in the state, it is possible to reliably prevent an erroneous operation such that the test plug is inserted while the predetermined function is in use. In addition, when the predetermined function is not in use, the suction means is excited only by pressing the open / close switch. Therefore, whenever the predetermined function is not in use, the test plug insertion slot is unnecessarily opened. Therefore, for example, foreign matter can be prevented from entering from the test plug insertion port.

  According to the invention of claim 2, the insertion opening / closing means closes the test plug insertion opening when the automatic restoration function of the electric panel is in use, the insertion of the test plug is prevented, and the automatic restoration function is not used. Since the test plug insertion slot is opened in the state, it is possible to reliably prevent an erroneous operation such that the test plug is inserted while the automatic recovery function is in use.

  According to the invention of claim 3, since the use state display means arranged in the vicinity of the test plug insertion port automatically indicates that the predetermined function is the use state and / or the non-use state, It is possible to clearly recognize whether the line is an unused line or a used line, and it is possible to prevent erroneous operations more reliably.

According to the invention of claim 4 , the insertion port opening / closing means closes the test plug insertion port when the predetermined function of the electric panel is in use, prevents the test plug from being inserted, and the predetermined function is not used. Since the test plug insertion slot is opened in the state, it is possible to reliably prevent an erroneous operation such that the test plug is inserted while the predetermined function is in use. In addition, when the predetermined function is not in use, the suction means is excited only by pressing the open / close switch. Therefore, whenever the predetermined function is not in use, the test plug insertion slot is unnecessarily opened. Therefore, for example, foreign matter can be prevented from entering from the test plug insertion port.

It is explanatory drawing for demonstrating the structure of the automatic recovery apparatus which concerns on one embodiment of this invention. It is an enlarged view which expands and shows the A section of FIG. It is explanatory drawing for demonstrating the structure and function of the test terminal part of the automatic recovery apparatus. It is explanatory drawing for demonstrating the structure and function of the test terminal part, Comprising: It is a figure which shows the state at the time of automatic recovery function use. It is explanatory drawing for demonstrating the structure and function of the test terminal part, Comprising: It is a figure which shows the state at the time of not using an automatic recovery function. It is explanatory drawing for demonstrating the structure and function of the test terminal part, Comprising: It is a figure which shows the state at the time of not using an automatic recovery function.

  Next, embodiments of the present invention will be described in detail with reference to the drawings.

  FIG. 1 is an explanatory diagram for explaining the configuration of an automatic recovery apparatus according to an embodiment of the present invention, FIG. 2 is an enlarged view showing an A portion of FIG. 1, and FIG. FIG. 4 is an explanatory diagram for explaining the configuration and functions of the test terminal unit of the apparatus, and FIG. 4 is an explanatory diagram for explaining the configuration and functions of the test terminal unit, showing a state when the automatic recovery function is used. 5 and 6 are explanatory diagrams for explaining the configuration and functions of the test terminal unit, and showing the state when the automatic recovery function is not used.

  As shown in FIG. 1, the automatic restoration device 1 is used to automatically restore a circuit breaker that has been interrupted by a turn-on operation after a certain period of time has elapsed since the circuit breaker (device) has been shut down due to an accident. Are equipped with test terminals 3, 3,... As shown in FIG. 2 and FIGS. 4 to 6, the test terminal portion 3 has a test plug insertion port 4 into which the test plug 19 is inserted and is disposed in the vicinity of the test plug insertion port 4. , A use state display unit 5 indicating a use state / non-use state of the automatic recovery function, and an insertion port opening / closing mechanism 6 that opens and closes the test plug insertion port 4 in accordance with the use state of the automatic recovery function. Further, as shown in FIG. 3, the test terminal unit 3 includes a positive electrode side terminal t1 and a negative electrode side terminal t2 for a display circuit, a positive electrode side terminal t3 for an excitation circuit, and a negative electrode side terminal t4. Yes.

  As shown in FIG. 3, the use state display unit 5 is made of a light-transmitting member, and is arranged on the nameplate 9 on which the corresponding line name and the like are displayed, on the back side of the nameplate 9, and illuminates and lights the nameplate It has the indicator lamp 11 comprised from LED which shows a use condition by. The make contact (a contact) 22 is closed by the excitation of the relay coil 21 of the auxiliary relay that operates when the automatic recovery function is used (when the 43 switch state of the corresponding line indicates “use”), and the make contact 22 is connected in series. The indicator lamp 11 connected to is turned on.

  When the automatic restoration function is not used, the relay coil 21 is restored, the make contact 22 is opened, and the indicator lamp 11 is extinguished. That is, when the indicator lamp 11 is turned on, it is automatically indicated that the automatic restoration function is in use, and when the indicator lamp 11 is extinguished, it is automatically indicated that the test plug can be inserted while the automatic restoration function is not in use. Shown in

  As shown in FIG. 2 and FIGS. 4 to 6, the insertion opening / closing mechanism 6 is disposed above the shutter opening / closing switch 12 and the test plug insertion opening 4 and is excited including a shutter drive coil. The movable member 14 disposed below the circuit 13 and the excitation circuit 13 and displaceable along the vertical direction by the excitation circuit 13, and a groove for guiding the displacement of the movable member 14 are formed and the movable member 14 is displaced. It has a movable member support part 15 for supporting it.

  The movable member 14 is attached to a plate-like shutter member 16 and an upper portion of the shutter member 16 and is made of a strip-shaped steel material or the like, and can be displaced upward by a magnetic attractive force of an excited shutter drive coil of the excitation circuit 13. It has the part 17 and the holding member 18 which is arrange | positioned at the both right and left sides of the action | operation part 17, and the edge part was exposed outside.

  As shown in FIG. 3, the make contact 24 is closed by the excitation of the relay coil 23 of the auxiliary relay that operates when the automatic recovery function is not used, and the shutter drive coil can be excited. In this state, when the shutter opening / closing switch 12 connected in series to the make contact 24 is pressed, the shutter driving coil of the excitation circuit 13 connected in series to the shutter opening / closing switch 12 is excited, and the operating unit 17 is moved upward. The movable member 14 is sucked up and the movable member 14 is displaced upward, and the test plug insertion port 4 closed by the shutter member 16 is opened, and the test plug 19 can be inserted.

  Further, when the automatic recovery function is used, the make contact 24 is opened and the shutter drive coil cannot be excited. As a result, the movable member 14 attracted upward by the shutter drive coil of the excitation circuit 13 falls (displaces downward) due to its own weight, and the test plug insertion port 4 is closed and closed by the shutter member 16. The test plug 19 is prevented from being inserted.

  That is, when the automatic restoration function is not in use, the movable member 14 is automatically displaced upward by pressing the shutter opening / closing switch 12, and the test plug insertion port 4 is opened, so that the test plug 19 Insertion into the insertion slot 4 is possible. Further, when the automatic recovery function is in use, the movable member 14 is automatically displaced downward, the test plug insertion port 4 is closed, and insertion of the test plug 19 is prevented. However, in this embodiment, even when the automatic recovery function is in use, the movable member 14 may be displaced upward by manually lifting the gripping part 18 to open the test plug insertion port 4. It has been made possible.

  Next, the operation of the test terminal unit will be described with reference to FIGS. When the automatic recovery function is not used, as shown in FIG. 3, the make contact 22 is opened and the indicator lamp 11 is extinguished. That is, it is indicated that the automatic restoration function is not in use by the extinguishing of the indicator lamp 11. Further, the make contact 24 is closed by excitation of the relay coil 23 of the auxiliary relay, and excitation is possible.

  In this state, when the shutter opening / closing switch 12 is pressed, the shutter drive coil of the excitation circuit 13 is excited, and as shown in FIG. 4, the operating portion 17 is drawn upward, and the movable member 14 is displaced upward, The test plug insertion port 4 that has been blocked by the shutter member 16 is opened. As a result, the test plug 19 is inserted into the test plug insertion port 4. For example, a measuring device such as a voltmeter is connected to the PTT plug as the test plug 19 to measure the voltage.

  When using the automatic recovery function, as shown in FIG. 3, the make contact 22 is closed and the indicator lamp 11 is lit by excitation of the relay coil 21 of the auxiliary relay. That is, when the indicator lamp 11 is turned on, it indicates that the automatic recovery function is in use. Further, the make contact 24 is opened, and excitation is disabled. Accordingly, as shown in FIGS. 5 and 6, the movable member 14 drawn upward by the shutter drive coil of the excitation circuit 13 falls due to its own weight, and the test plug insertion port 4 is blocked by the shutter member 16. And closed.

  When the automatic restoration function is not used and the test plug 19 is inserted into the test plug insertion port 4 and measurement is performed, the line may be restored and the automatic restoration function may be in use. However, the worker can know the change to the use state by lighting the indicator lamp 11 of the use state display unit 5.

  Thus, according to the configuration of this embodiment, when the automatic recovery function is not in use, the shutter drive coil is excited by pressing the shutter opening / closing switch 12, and the movable member 14 is excited by the magnetic attraction of the shutter drive coil. Is displaced upward, the test plug insertion port 4 is opened, and the test plug 19 can be inserted into the test plug insertion port 4. When the automatic recovery function is in use, the movable member 14 is automatically displaced downward, the test plug insertion port 4 is closed, and insertion of the test plug 19 is prevented. As a result, it is possible to reliably prevent an erroneous operation such as inserting the test plug 19 while the recovery function is being used. Therefore, for example, a power failure due to a human error can be prevented.

  In addition, when the automatic recovery function is not used, the shutter drive coil is excited only when the shutter opening / closing switch 12 is pressed, so that the test plug insertion port 4 can be used unnecessarily whenever the automatic recovery function is not used. It will never be open. Therefore, for example, foreign matter can be prevented from entering from the test plug insertion opening 4.

  Furthermore, lighting of the indicator lamp 11 disposed in the vicinity of the test plug insertion port 4 automatically indicates that the automatic recovery function is in use. When the indicator lamp 11 is turned off, the automatic recovery function is not used. Therefore, the worker can clearly recognize whether the line is an unused line or a used line, and can prevent erroneous operation more reliably. Since the shutter drive coil is in a non-excited state when the automatic recovery function is in use, the movable member 14 is displaced upward by manually using the gripping part 18 even in use, and the test plug is inserted. Since the mouth 4 can be opened, the work can be performed smoothly when the work for using the automatic recovery function is required.

  The embodiments of the present invention have been described in detail with reference to the drawings. However, the specific configuration is not limited to these embodiments, and the design can be changed without departing from the gist of the present invention. Is included in the present invention. For example, in the above-described embodiment, the case where the indicator light is turned on when the recovery function is used and the lamp is turned off when the recovery function is not used has been described. However, the display color (when the recovery function is used and when the recovery function is not used) Separate indicator lights of different colors (red and green, etc.) may be lit. Further, the blinking pattern may be changed between when the recovery function is used and when the recovery function is not used. Thereby, the non-lighting by the failure of an indicator lamp can be distinguished.

  Further, the shutter opening / closing switch 12 may be eliminated. Further, instead of the excitation circuit 13, the movable member 14 may be driven by a motor or the like. The movable member may be slid along the horizontal direction. Further, the gripping member is abolished, for example, an insertion hole through which the rod-shaped member can be inserted is formed in the movable member, and the rod-shaped member is inserted into the insertion hole during operation, and the movable member is operated as necessary. You may do it. Here, the rod-shaped member and the insertion hole may have a predetermined cross-sectional shape (for example, a polygonal shape) that can be fitted.

  In general, the present invention is not limited to an automatic recovery device, and can be applied to an electrical panel provided with a protective relay and a test terminal. In addition to substations and power plants, the present invention can be applied to test terminals for electrical panels installed in customer's electrical rooms as electrical stations.

1 Automatic recovery device (electric panel)
2 Protection relay 3 Test terminal section (test terminal)
4 Test plug insertion slot 5 Usage status display (usage status display means)
6 Insert opening / closing mechanism (Insertion opening / closing means)
12 Shutter open / close switch (open / close switch)
13 Excitation circuit (suction means)
14 Movable member 19 Test plug

Claims (4)

A test terminal provided on an electric board having a predetermined function and used for a protective relay test,
A test plug insertion slot into which a corresponding test plug is inserted, and when the predetermined function is in use, the test plug insertion slot is closed, and when the predetermined function is not in use, An insertion port opening / closing means for opening the test plug insertion port;
The insertion port opening / closing means includes a movable member that opens and closes the test plug insertion port and can be attracted by magnetic attraction, a suction unit that attracts the movable member when excited, and a suction unit An open / close switch connected in series, and when the open / close switch is operated when the predetermined function is not in use, the suction means is excited, the movable member is sucked, and the test When the predetermined function is in use, the suction means is in an unexcitable state, the movable member falls due to its own weight, and the test plug insertion port is closed. The test terminal is characterized in that the movable member can be manually displaced .   The electrical panel has an automatic recovery function for automatically recovering a shut-off device after a predetermined time, and the insertion port opening / closing means closes the test plug insertion port when the automatic recovery function is in use. The test terminal according to claim 1, wherein the test plug insertion port is opened when the automatic recovery function is not in use.   3. The test terminal according to claim 1, further comprising a use state display unit that is disposed in the vicinity of the test plug insertion port and indicates a use state and / or a non-use state of the predetermined function. An electrical panel having a predetermined function and provided with a test terminal used for a protective relay test,
The test terminal includes a test plug insertion slot into which a corresponding test plug is inserted, and closes the test plug insertion slot when the predetermined function is in use, so that the predetermined function is not used. When in a state, provided with an insertion port opening and closing means for opening the test plug insertion port,
The insertion port opening / closing means includes a movable member that opens and closes the test plug insertion port and can be attracted by magnetic attraction, a suction unit that attracts the movable member when excited, and a suction unit An open / close switch connected in series, and when the open / close switch is operated when the predetermined function is not in use, the suction means is excited, the movable member is sucked, and the test When the predetermined function is in use, the suction means is in an unexcitable state, the movable member falls due to its own weight, and the test plug insertion port is closed. In addition, an electric board wherein the movable member can be manually displaced .

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