CN110412322B - Secondary voltage switching device for station electric energy metering - Google Patents
Secondary voltage switching device for station electric energy metering Download PDFInfo
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- CN110412322B CN110412322B CN201910854294.7A CN201910854294A CN110412322B CN 110412322 B CN110412322 B CN 110412322B CN 201910854294 A CN201910854294 A CN 201910854294A CN 110412322 B CN110412322 B CN 110412322B
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- 230000000712 assembly Effects 0.000 claims abstract description 17
- 238000000429 assembly Methods 0.000 claims abstract description 17
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical group [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 claims description 13
- 230000000007 visual effect Effects 0.000 claims description 10
- 230000008878 coupling Effects 0.000 claims description 4
- 238000010168 coupling process Methods 0.000 claims description 4
- 238000005859 coupling reaction Methods 0.000 claims description 4
- 238000005259 measurement Methods 0.000 claims description 2
- 238000000034 method Methods 0.000 description 5
- 230000009471 action Effects 0.000 description 3
- 230000032683 aging Effects 0.000 description 2
- 238000012423 maintenance Methods 0.000 description 2
- 230000008569 process Effects 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000002788 crimping Methods 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000013461 design Methods 0.000 description 1
- 238000010438 heat treatment Methods 0.000 description 1
- 238000002955 isolation Methods 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
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- 239000004065 semiconductor Substances 0.000 description 1
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
- G01R11/00—Electromechanical arrangements for measuring time integral of electric power or current, e.g. of consumption
- G01R11/02—Constructional details
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Abstract
The invention discloses a station electric energy metering secondary voltage switching device which comprises a shell, wherein the shell is surrounded by a front panel, a rear panel, an upper panel, a lower panel, a left panel and a right panel, and two groups of wire inlet connection assemblies which are identical in structure and are symmetrically arranged up and down and two groups of wire outlet connection assemblies which are identical in structure and are symmetrically arranged up and down are arranged in the shell. The secondary voltage switching device for the station electric energy metering provided by the invention realizes reliable switching of the metering secondary voltage, has the characteristics of simple wiring, is convenient to use and maintain, and simultaneously solves the problem that the voltage loss of the electric energy meter cannot be automatically and remotely checked when the line and the main transformer are in a cold standby and overhauling state and the relay group is used as the switching device.
Description
Technical Field
The embodiment of the invention relates to the technical field of secondary voltage switching, in particular to a secondary voltage switching device for station electric energy metering.
Background
The secondary voltage of a bus voltage transformer is mostly used for measuring the voltage of the station line and the main transformer measuring point electric energy meter. In order to improve the operation flexibility and the power supply reliability, the primary system of the station is provided with a double-bus wiring mode and a single-bus sectional wiring mode. When the primary side line and the main transformer are switched to different buses to operate according to operation requirements, the corresponding bus voltage transformer secondary voltage is required to be used for measuring voltage of the electric energy meter at the measuring point.
The secondary voltage loop switching of the current station metering point is mainly performed through two relays. When the bus side disconnecting link is closed, the corresponding direct current signal line is electrified, and the direct current signal line is usually in direct current 110V and 220V. The direct current signal line is connected to the relay power end, and when the direct current signal line is electrified, the relay works to enable the normally open contact to be closed, and the voltage port of the electric energy meter is connected to the corresponding bus voltage transformer secondary circuit. The other bus side disconnecting link is disconnected, the corresponding direct current signal line is not electrified, the corresponding relay does not work, and the bus voltage sensor secondary loop is isolated from the electric energy meter, so that the metering secondary voltage switching is realized.
The prior art scheme has the following problems:
1. the relay contact is a normally open contact, and the contact is closed when the relay works so as to electrify the electric energy meter. When the circuit and the main transformer are in a cold standby and overhauling state, the side disconnecting link of each bus is disconnected, the direct current signal circuit is not electrified, and both relays cannot work, so that the electric energy meter is out of voltage and cannot perform remote automatic meter reading.
2. In order to keep the contacts closed, the relay direct-current coil is always in an electrified working state, the relay coil is seriously heated, ageing of the relay is accelerated, and ageing and damage of the relay plastic material with longer running time are serious.
3. The power failure of the direct current signal line can lead the relay to work abnormally, and the relay can not be attracted or the attraction force is insufficient, so that the metering failure occurs.
4. The relay contacts can deform for a long time to cause poor contact and metering faults.
5. There are various types of relays. After the relay is damaged, the relay with the same model needs to be found for replacement, and inconvenience is brought to later maintenance.
6. The relay group is many, and the wiring is difficult to directly perceived take place the wrong line of wiring, is inconvenient for maintaining.
Disclosure of Invention
The invention provides a station electric energy metering secondary voltage switching device which aims to solve the defects in the prior art.
In order to achieve the above object, the present invention provides the following technical solutions:
the utility model provides a station electric energy measurement secondary voltage auto-change over device, includes the casing, the casing is enclosed by front panel, rear panel, top panel, lower panel, left panel and right panel, be provided with two sets of inlet wire coupling assembling that the structure is the same and upper and lower symmetry set up in the casing and two sets of structure are the same and upper and lower symmetry set up the outlet wire coupling assembling;
each group of the incoming line connecting assemblies comprises three incoming line connecting pieces which are horizontally arranged and are respectively an A-phase incoming line connecting piece, a B-phase incoming line connecting piece and a C-phase incoming line connecting piece;
the three wire inlet connecting pieces are supported by the two guide grooves and restrict a movement path, one ends of the three wire inlet connecting pieces are respectively connected with one end of the insulating connecting rod, the other ends of the three wire inlet connecting pieces are respectively provided with a hook part, and the other ends of the insulating connecting rods are connected with a first tension spring; a first insulating fixing plate is arranged between the two guide grooves and is fixedly connected with the three incoming wire connecting pieces through fixing screws respectively, a closing armature is arranged on the first insulating fixing plate, and a closing coil matched with the closing armature for use is arranged in front of the closing armature;
each group of the outgoing line connecting assemblies comprises three outgoing line connecting pieces which are horizontally arranged and are respectively an A-phase outgoing line connecting piece, a B-phase outgoing line connecting piece and a C-phase outgoing line connecting piece;
the three outgoing line connecting pieces are fixed by a second insulating fixed plate, one ends of the three outgoing line connecting pieces are respectively fixed on a rotating shaft seat, and the other ends of the three outgoing line connecting pieces are respectively provided with the hook buckle parts; the second insulating fixing plate is connected with a second tension spring, and a supporting shaft is arranged in the acting force direction of the second tension spring; a trip bar is arranged in the middle of the second insulating fixed plate, the trip bar is movably connected in a trip frame, and a trip pressure spring for driving the trip bar to move upwards is sleeved on the trip bar; the part of the trip bar, which is exposed out of the trip frame, is connected with one end of a trip armature, and the other end of the trip armature is connected to an electromagnetic trip iron core; the power supply loop of the electromagnetic release iron core is connected with a movable contact of the direct-acting travel switch and a normally-closed contact of the voltage loss monitor, and the power supply loop of the closing coil is connected in series with a movable break contact of the direct-acting travel switch.
Further, in the secondary voltage switching device for the station electric energy metering, two first tension springs are arranged in each group of the incoming line connecting assemblies, and the two first tension springs are symmetrically arranged between the insulating connecting rod and the right panel.
Further, in the secondary voltage switching device for power metering of the plant, the front panel and the rear panel are respectively provided with a supporting groove for supporting the first insulating fixing plate;
the supporting groove positioned on the front panel is a visual supporting groove capable of displaying the internal closing state.
Further, in the secondary voltage switching device for the station electric energy metering, the left side position of the visual supporting groove is printed with a logo of a closing state character, and the right side position of the visual supporting groove is printed with a logo of a separating state character.
Further, in the secondary voltage switching device for power metering of the plant, the second tension springs in the upper group of the wire outlet connection assemblies are arranged between the second insulating fixing plate and the upper panel;
the second tension springs in the lower set of outlet connection assemblies are disposed between the second insulating fixing plate and the lower panel.
Further, in the secondary voltage switching device for power metering of the station, the front panel and the rear panel are respectively provided with a fixing groove for fixing the supporting shaft.
Further, in the secondary voltage switching device for the station electric energy metering, the rotating shaft seat is fixed on the left panel.
Further, in the secondary voltage switching device for power metering of the plant, openings are respectively formed in positions of the upper panel and the lower panel corresponding to the tripping rod so as to perform manual tripping.
Further, in the secondary voltage switching device for station electric energy metering, an opening is formed in the position, corresponding to the B-phase incoming line connecting sheet, of the right panel so as to conduct manual switching-on.
Compared with the prior art, the embodiment of the invention has the following beneficial effects:
1. the wiring is visual and simple, the maintenance is convenient, only two groups of bus voltage transformer secondary voltage loops and corresponding direct current signal power supplies are connected to the wiring, and a group of secondary voltage outgoing lines are connected to the electric energy meter;
2. the low power consumption, through adopting the clasp mode and tension spring to keep the state, except that the low-power voltage loss monitor needs to be electrified for a long time to keep the state, other electromagnetic coils are electrified to provide power only when the state needs to be changed, and the power supply is automatically disconnected after the action is finished, so that the heating problem caused by the fact that the electromagnetic relay needs to be electrified for a long time to provide power to keep the state does not exist;
3. the problem of poor contact caused by poor connection and deformation when the crimping mode is adopted is solved, and reliable connection is ensured by adopting the hooking mode;
4. the circuit and the main transformer are cooled for standby or overhauling, the metering secondary voltage loop is not disconnected by the device, the voltage loss of the electric energy meter cannot be measured remotely, the primary side disconnecting link corresponding to the circuit is disconnected by the disconnection loop, the metering secondary voltage loop is disconnected only when the direct current signal circuit is powered off and the other bus disconnecting link is connected, and the operation condition of disconnecting the metering secondary voltage loop by the device is not met only when the circuit and the main transformer are cooled for standby or overhauling.
Drawings
In order to more clearly illustrate the embodiments of the invention or the technical solutions of the prior art, the drawings which are used in the description of the embodiments or the prior art will be briefly described, it being obvious that the drawings in the description below are only some embodiments of the invention, and that other drawings can be obtained from these drawings without inventive faculty for a person skilled in the art.
FIG. 1 is a front view of a station electric energy metering secondary voltage switching device provided by an embodiment of the invention;
FIG. 2 is a top view of a secondary voltage switching device for power metering in a plant according to an embodiment of the present invention;
FIG. 3 is a left side view of a wire connecting portion of an outlet connection pad in an embodiment of the invention;
fig. 4 is a right side view of the wire connection section of the wire connection tab in an embodiment of the invention.
Reference numerals:
the device comprises a wire inlet connecting piece 10, a guide groove 20, an insulating connecting rod 30, a first tension spring 40, a first insulating fixing plate 50, a closing armature 60, a closing coil 70, a wire outlet connecting piece 80, a second insulating fixing plate 90, a rotating shaft seat 100, a second tension spring 110, a supporting shaft 120, a tripping rod 130, a tripping armature 140, an electromagnetic tripping iron core 150, a direct-acting travel switch moving contact 160, a normally closed contact 170 of a pressure loss monitor, a direct-acting travel switch moving contact 180, a pressure loss monitor coil 190, a supporting groove 200 and a fixing groove 210;
a phase A wire inlet connection piece 11, a phase B wire inlet connection piece 12 and a phase C wire inlet connection piece 13;
phase a line connection 81, phase b line connection 82, phase c line connection 83.
Detailed Description
In order to make the objects, features and advantages of the present invention more obvious and understandable, the technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is apparent that the embodiments described below are only some embodiments of the present invention, not all embodiments of the present invention. All other embodiments, which can be made by those skilled in the art based on the embodiments of the invention without making any inventive effort, are intended to be within the scope of the invention.
In the description of the present invention, it will be understood that when one component is referred to as being "connected" to another component, it can be directly connected to the other component or intervening components may also be present. When an element is referred to as being "disposed on" another element, it can be directly on the other element or intervening elements may also be present.
Furthermore, the terms "long," "short," "inner," "outer," and the like, as used herein, refer to an orientation or positional relationship based on that shown in the drawings, for convenience of description of the present invention, and are not intended to indicate or imply that the apparatus or elements referred to must have this particular orientation, operate in a particular orientation configuration, and thus should not be construed as limiting the invention.
The technical scheme of the invention is further described below by the specific embodiments with reference to the accompanying drawings.
Example 1
Referring to fig. 1 to 4, an embodiment of the present invention provides a secondary voltage switching device for power metering of a plant, including a housing, where the housing is surrounded by a front panel, a rear panel, an upper panel, a lower panel, a left panel and a right panel, and two groups of incoming line connection assemblies with the same structure and arranged symmetrically up and down and two groups of outgoing line connection assemblies with the same structure and arranged symmetrically up and down are arranged in the housing;
each group of the incoming line connecting components comprises three incoming line connecting pieces 10 which are horizontally arranged in a transverse direction, namely an A-phase incoming line connecting piece 11, a B-phase incoming line connecting piece 12 and a C-phase incoming line connecting piece 13;
the three wire inlet connecting pieces 10 are supported by the two guide grooves 20 and restrict a movement path, one ends of the three wire inlet connecting pieces 10 are respectively connected with one ends of the insulating connecting rods 30, the other ends of the three wire inlet connecting pieces 10 are respectively provided with a hook buckle part, and the other ends of the insulating connecting rods 30 are connected with first tension springs 40; a first insulating fixing plate 50 is arranged between the two guide grooves 20, the first insulating fixing plate 50 is fixedly connected with the three incoming wire connecting pieces 10 through fixing screws respectively, a closing armature 60 is arranged on the first insulating fixing plate 50, and a closing coil 70 matched with the closing armature 60 is arranged in front of the closing armature 60;
each group of the outgoing line connecting components comprises three outgoing line connecting pieces 80 which are horizontally arranged in the transverse direction, namely an A-phase outgoing line connecting piece 81, a B-phase outgoing line connecting piece 82 and a C-phase outgoing line connecting piece 83;
the three wire outlet connection pieces 80 are fixed by the second insulating fixing plate 90, one ends of the three wire outlet connection pieces 80 are respectively fixed on a rotating shaft seat 100, and the other ends of the three wire outlet connection pieces 80 are respectively provided with the hook buckle parts; the second insulating fixing plate 90 is connected with a second tension spring 110, and a supporting shaft 120 is arranged in the acting force direction of the second tension spring 110; a trip bar 130 is arranged in the middle of the second insulating fixing plate 90, the trip bar 130 is movably connected in a trip frame, and a trip pressure spring for driving the trip bar 130 to move upwards is sleeved on the trip bar 130; the part of the trip bar 130 exposing the trip frame is connected with one end of the trip armature 140, and the other end of the trip armature 140 is connected to the electromagnetic trip iron core 150 (the electromagnetic trip iron core 150 is wound with a coil); the power circuit of the electromagnetic release iron core 150 is connected with a movable contact 160 of the direct-acting travel switch and a normally-closed contact 170 of the voltage loss monitor, and the power circuit of the closing coil 70 is connected in series with a movable contact 180 of the direct-acting travel switch.
Preferably, there are two first tension springs 40 in each group of the incoming line connection assemblies, and the two first tension springs 40 are symmetrically disposed between the insulating connecting rod 30 and the right panel.
Preferably, the front panel and the rear panel are provided with supporting grooves 200 for supporting the first insulating fixing plate 50;
the supporting groove 200 on the front panel is a visual supporting groove capable of displaying the internal closing state.
The left side position of the visual support groove is printed with a logo of a closing state character, and the right side position of the visual support groove is printed with a logo of a separating state character.
Preferably, the second tension springs 110 in the upper set of the outlet connection assemblies are disposed between the second insulating fixing plate 90 and the upper panel;
the second tension springs 110 in the lower set of the outlet connection assemblies are disposed between the second insulating fixing plate 90 and the lower panel.
Preferably, the front panel and the rear panel are provided with fixing grooves 210 for fixing the support shaft 120.
The rotating shaft seat 100 is fixed on the left panel.
Preferably, the upper panel and the lower panel are respectively provided with openings corresponding to the positions of the trip bar 130 for manual trip.
The right panel is provided with an opening corresponding to the position of the B-phase incoming line connecting sheet 12 for manual closing.
It should be noted that, in normal state, the incoming wire connecting piece 10 is pulled to the right side of the switching device by the first tension spring 40, at this time, the incoming wire connecting piece 10 is not connected to the outgoing wire connecting piece 80, and the loop is in a disconnected state.
When the bus side disconnecting link is closed, the direct current signal line is electrified, and the closing coil 70 is electrified to attract the closing armature 60, so that the wire inlet connecting piece 10 is pulled to move to the left side, and closing action is performed.
The upper and lower sets of wire-outlet connection pieces 80 are connected in parallel in phase, and reference may be made to fig. 3, in which the first set of bus voltage transformer secondary wires A1, B1, and C1 are connected in parallel with the second set of bus voltage transformer secondary wires A2, B2, and C2 in correspondence: A1-A2, B1-B2, C1-C2.
Normally, the outgoing line connecting piece 80 is kept fixed on the supporting shaft 120 by the second tension spring 110, and the outgoing line connecting piece 80 is kept in the same horizontal direction with the incoming line connecting piece 10 by the axle center of the rotating shaft seat 100 and the supporting shaft 120.
The outgoing line connecting pieces 80 of the phase A, the phase B and the phase C are fixed by a second insulating plate, synchronous movement of the three-phase outgoing line connecting pieces 80 is realized, when the corresponding bus side disconnecting switch of the circuit is disconnected, the direct current signal line is out of voltage, and the other bus side disconnecting switch is closed to enable the other direct current signal line to be electrified, the electromagnetic release iron core 150 is electrified to attract the release armature 140, and at the moment, the outgoing line side connecting pieces rotate in the direction away from the supporting shaft 120 by taking the axis of the rotating shaft seat 100 as the center of a circle so as to release from the incoming line connecting pieces 10. The wire inlet connection piece 10 is reset under the pulling of the first tension spring 40, and the voltage loop is disconnected.
In the present embodiment, the travel switch is a direct-acting travel switch, and includes a direct-acting travel switch moving contact 180 and a direct-acting travel switch moving contact 160. The direct-acting travel switch moving contact 180 is normally kept in an on state, connected to a power supply circuit of the closing coil 70 for performing a secondary circuit closing operation, and the direct-acting travel switch moving contact 160 is normally kept in an off state, connected to a power supply circuit of the electromagnetic release iron core 150 for performing a releasing operation.
In this embodiment, the power source of the closing coil 70 is a dc signal power source of the bus bar switch, the dc signal line is electrified after the bus bar switch is closed, and the moving breaking contact 180 of the direct-acting travel switch is in a closed state, and the closing armature 60 is electrically attracted to the closing coil 70 to pull the wire inlet connection piece 10 to close with the wire outlet connection piece 80. The direct-acting travel switch movable breaking contact 180 collides with the first insulating fixed plate 50 before the incoming wire connecting piece 10 and the outgoing wire connecting piece 80 are completely switched on, so that the direct-acting travel switch movable breaking contact 180 breaks the power supply loop of the switching-on coil 70, and the incoming wire connecting piece 10 moves forward again due to inertia, so that the incoming wire connecting piece 10 and the outgoing wire connecting piece 80 are completely switched on. The hook of the wire inlet connecting piece 10 contacts with the hook of the wire outlet connecting piece 80 to push the wire outlet connecting piece 80 to rotate so that the wire inlet connecting piece 10 and the wire outlet connecting piece 80 are closed. The outgoing line connecting piece 80 is tightly pressed with the incoming line connecting piece 10 by means of the tension of the second tension spring 110, the movable breaking contact 180 of the direct-acting travel switch collides with the first insulating fixed plate 50, the power supply of the closing coil 70 is disconnected, and the incoming line connecting piece 10 is fastened with the outgoing line connecting piece 80 by means of the tension of the first spring, so that reliable connection is achieved.
The power supply of the electromagnetic release adopts another busbar disconnecting link direct current signal line power supply. The normally-closed contact 170 of the voltage loss monitor is connected in series with a power supply loop of the electromagnetic release iron core 150, and the normally-closed contact 170 of the voltage loss monitor is recovered to be conducted after the voltage of the direct current signal line at the local end is lost; the power supply circuit of the electromagnetic release iron core 150 is connected in series with the movable contact 160 of the direct-acting travel switch, and the movable contact 160 of the direct-acting travel switch is conducted after the movable contact 180 of the direct-acting travel switch collides with the first insulating fixed plate 50, so that the secondary voltage loop is in a closing state. And the corresponding direct current signal line is electrified after the other bus side disconnecting link is switched on, the electromagnetic release executes a release action, the direct-acting travel switch is reset after the release, the power supply loop of the electromagnetic release iron core 150 is disconnected, and the power supply loop of the switching-on coil 70 is restored to be connected. The tripping execution condition comprises that the bus side disconnecting link corresponding to the local end is disconnected, namely the loss of voltage of the coil 190 of the loss-of-voltage monitor, the closing armature 60 is reset under the pulling of the first tension spring 40, and the normally closed contact 170 of the loss-of-voltage monitor is restored to be conducted; the incoming line connecting piece 10 and the outgoing line connecting piece 80 are in a buckling state, namely the direct-acting travel switch movable contact 160 is conducted; the other direct current signal line is electrified, namely the other bus side disconnecting link is switched on, and the primary system line and the main transformer are switched to the direct current signal line corresponding to the operation of the other bus to be electrified.
The embodiment adopts a mechanical structure and a scheme of matching with devices such as an electromagnetic relay, a travel switch and the like, and also can adopt a design scheme of a microcontroller, an electronic relay (including other controllable devices capable of realizing voltage connection and isolation) and other semiconductor control devices. Because the metering secondary circuit has strict requirements on voltage drop, the main device electronic relay in the alternative scheme directly acts on the metering secondary voltage circuit, and the voltage of the metering secondary circuit is not influenced, including voltage magnitude and phase. The electronic relay should be able to isolate the voltage in the event of a disconnection.
The secondary voltage switching device for metering the electric energy of the station provided by the embodiment of the invention realizes reliable switching of the secondary voltage metering, has the characteristics of simple wiring, is convenient to use and maintain, and simultaneously solves the problem that the voltage loss of the electric energy meter cannot be automatically and remotely checked when the circuit and the main transformer are in a cold standby and overhauling state and the relay group is used as a switching device.
The description of the foregoing embodiments has been provided for the purposes of illustration and description. It is not intended to be exhaustive or to limit the disclosure. Individual elements or features of a particular embodiment are generally not limited to the particular embodiment, but, where applicable, may be interchanged and used with the selected embodiment even if not specifically shown or described. The same elements or features may also be varied in many ways. Such variations are not to be regarded as a departure from the disclosure, and all such modifications are intended to be included within the scope of the disclosure.
Example embodiments are provided so that this disclosure will be thorough, and will fully convey the scope to those skilled in the art. Numerous details are set forth, such as examples of specific parts, devices, and methods, in order to provide a thorough understanding of embodiments of the present disclosure. It will be apparent to one skilled in the art that the exemplary embodiments may be embodied in many different forms without the use of specific details, and neither should be construed to limit the scope of the disclosure. In certain example embodiments, well-known processes, well-known device structures, and well-known techniques are not described in detail.
The terminology used herein is for the purpose of describing particular example embodiments only and is not intended to be limiting. As used herein, the singular forms "a", "an" and "the" are intended to include the plural forms as well, unless the context clearly indicates otherwise. The terms "comprises" and "comprising" are inclusive and, therefore, specify the presence of stated features, integers, steps, operations, elements, and/or components, but do not preclude the presence or addition of one or more other features, integers, steps, operations, elements, components, and/or groups thereof. The method steps, processes, and operations described herein are not to be construed as necessarily requiring their performance in the particular order discussed and illustrated, unless specifically indicated. It should also be appreciated that additional or alternative steps may be employed.
When an element or layer is referred to as being "on," "engaged with," "connected to" or "coupled to" another element or layer, it can be directly on, engaged with, connected to or coupled to the other element or layer, or intervening elements or layers may also be present. In contrast, when an element or layer is referred to as being "directly on" … …, "" directly engaged with "… …," "directly connected to" or "directly coupled to" another element or layer, there may be no intervening elements or layers present. Other words used to describe the relationship of elements should be interpreted in a similar manner (e.g., "between … …" and "directly between … …", "adjacent" and "directly adjacent", etc.). The term "and/or" as used herein includes any and all combinations of one or more of the associated listed items. Although the terms first, second, third, etc. may be used herein to describe various elements, components, regions, layers and/or sections, these elements, components, regions, layers and/or sections should not be limited by these terms. These terms may be only used to distinguish one element, component, region or section from another element, component, region or section. Unless clearly indicated by the context, terms such as the terms "first," "second," and other numerical values are used herein to not imply a sequence or order. Accordingly, a first element, component, region, layer or section discussed below could be termed a second element, component, region, layer or section without departing from the teachings of the example embodiments.
Spatially relative terms, such as "inner," "outer," "below," "beneath," "lower," "above," "upper" and the like, may be used herein for ease of description to describe one element or feature's relationship to another element or feature's illustrated in the figures. Spatially relative terms may be intended to encompass different orientations of the device in addition to the orientation depicted in the figures. For example, if the device in the figures is turned over, elements described as "below" or "beneath" other elements or features would then be oriented "above" the other elements or features. Thus, the example term "below" … … can encompass both upward and downward orientations. The device may be otherwise oriented (rotated 90 degrees or otherwise) and interpreted in the relative description of the space herein.
Claims (9)
1. The utility model provides a station electric energy measurement secondary voltage switching device which is characterized in that, includes the casing, the casing is enclosed by front panel, rear panel, top panel, lower panel, left panel and right panel, be provided with two sets of inlet wire coupling assembling that the structure is the same and upper and lower symmetry set up and two sets of outlet wire coupling assembling that the structure is the same and upper and lower symmetry set up in the casing;
each group of the incoming line connecting assemblies comprises three incoming line connecting pieces which are horizontally arranged and are respectively an A-phase incoming line connecting piece, a B-phase incoming line connecting piece and a C-phase incoming line connecting piece;
the three wire inlet connecting pieces are supported by the two guide grooves and restrict a movement path, one ends of the three wire inlet connecting pieces are respectively connected with one end of the insulating connecting rod, the other ends of the three wire inlet connecting pieces are respectively provided with a hook part, and the other ends of the insulating connecting rods are connected with a first tension spring; a first insulating fixing plate is arranged between the two guide grooves and is fixedly connected with the three incoming wire connecting pieces through fixing screws respectively, a closing armature is arranged on the first insulating fixing plate, and a closing coil matched with the closing armature for use is arranged in front of the closing armature;
each group of the outgoing line connecting assemblies comprises three outgoing line connecting pieces which are horizontally arranged and are respectively an A-phase outgoing line connecting piece, a B-phase outgoing line connecting piece and a C-phase outgoing line connecting piece;
the three outgoing line connecting pieces are fixed by a second insulating fixed plate, one ends of the three outgoing line connecting pieces are respectively fixed on the rotating shaft seat, and the other ends of the three outgoing line connecting pieces are respectively provided with the hook buckle parts; the second insulating fixing plate is connected with a second tension spring, and a supporting shaft is arranged in the acting force direction of the second tension spring; a trip bar is arranged in the middle of the second insulating fixed plate, the trip bar is movably connected in a trip frame, and a trip pressure spring for driving the trip bar to move upwards is sleeved on the trip bar; the part of the trip bar, which is exposed out of the trip frame, is connected with one end of a trip armature, and the other end of the trip armature is connected to an electromagnetic trip iron core; the power supply loop of the electromagnetic release iron core is connected with a movable contact of the direct-acting travel switch and a normally-closed contact of the voltage-losing monitor, the power supply loop of the closing coil is connected in series with the movable contact of the direct-acting travel switch, the power supply of the closing coil is a direct-current signal power supply of a bus disconnecting link at the local end, the power supply of the electromagnetic release adopts a direct-current signal power supply of another bus disconnecting link, the tripping execution condition comprises that the corresponding bus side disconnecting link at the local end is disconnected, namely the coil of the voltage-losing monitor is out of voltage, the closing armature is reset under the pull of a first tension spring, and the normally-closed contact of the voltage-losing monitor is recovered to be conducted; the incoming line connecting piece and the outgoing line connecting piece are in a buckling state, namely, the direct-acting travel switch movable contact is conducted; the direct current signal line of the other bus disconnecting link is electrified, namely the other bus side disconnecting link is switched on, the primary system line and the main transformer are switched to the other bus, and the other bus runs the corresponding direct current signal line to be electrified.
2. The station electric energy metering secondary voltage switching device according to claim 1, wherein two first tension springs in each group of the incoming line connection assemblies are symmetrically arranged between the insulating connecting rod and the right panel.
3. The station electric energy metering secondary voltage switching device according to claim 1, wherein the front panel and the rear panel are provided with supporting grooves for supporting the first insulating fixing plate;
the supporting groove positioned on the front panel is a visual supporting groove capable of displaying the internal closing state.
4. The station electric energy metering secondary voltage switching device according to claim 3, wherein the left side position of the visual support groove is printed with a logo of a "closing state" character, and the right side position of the visual support groove is printed with a logo of a "opening state" character.
5. The station electric energy metering secondary voltage switching device of claim 1, wherein the second tension springs in the upper set of the outlet connection assemblies are disposed between the second insulating fixing plate and the upper panel;
the second tension springs in the lower set of outlet connection assemblies are disposed between the second insulating fixing plate and the lower panel.
6. The station electric energy metering secondary voltage switching device according to claim 1, wherein the front panel and the rear panel are provided with fixing grooves for fixing the supporting shafts.
7. The station electric energy metering secondary voltage switching device according to claim 1, wherein the rotating shaft seat is fixed on the left panel.
8. The secondary voltage switching device for power metering of a plant according to claim 1, wherein openings are respectively formed in positions of the upper panel and the lower panel corresponding to the tripping rod for manual tripping.
9. The station electric energy metering secondary voltage switching device according to claim 1, wherein the right panel is provided with an opening corresponding to the position of the B-phase incoming line connecting piece for manual closing.
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| CN110412322B true CN110412322B (en) | 2024-03-19 |
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| CN110412322A (en) | 2019-11-05 |
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