CN210863831U - Station electric energy measurement secondary voltage auto-change over device - Google Patents
Station electric energy measurement secondary voltage auto-change over device Download PDFInfo
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- CN210863831U CN210863831U CN201921500329.9U CN201921500329U CN210863831U CN 210863831 U CN210863831 U CN 210863831U CN 201921500329 U CN201921500329 U CN 201921500329U CN 210863831 U CN210863831 U CN 210863831U
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Abstract
The utility model discloses a station electric energy measurement secondary voltage auto-change over device, which comprises a housin, the casing is enclosed by front panel, rear panel, top panel, lower panel, left side board and right side board, be provided with the inlet wire coupling assembling that two sets of structures are the same and the longitudinal symmetry set up and the outlet wire coupling assembling that two sets of structures are the same and the longitudinal symmetry set up in the casing. The utility model provides a pair of station electric energy measurement secondary voltage auto-change over device realizes the reliable switching to measurement secondary voltage, possess the simple characteristics of wiring, convenient to use maintains, solve circuit and main change simultaneously and be in cold reserve and the maintenance state can't long-range automatic problem of checking meter with the electric energy meter decompression when relay group is as auto-change over device, and through adopting the hook-and-loop mode, need not the relay and be in actuation operating condition always, solve with the problem of generating heat and the contact problem when relay group is as auto-change over device.
Description
Technical Field
The embodiment of the utility model provides a secondary voltage switches technical field, especially relates to a station electric energy measurement secondary voltage auto-change over device.
Background
The electric energy meter at the metering points of the plant station line and the main transformer mostly uses the secondary voltage of the bus voltage transformer. In order to improve the flexibility of operation and the reliability of power supply, a primary system of a station has 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 the operation requirement, the metering voltage of the electric energy meter at the metering point needs to use the secondary voltage of the corresponding bus voltage transformer.
The switching of the secondary voltage loop of the current station metering point is mainly realized 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 generally 110V or 220V direct current. The direct current signal circuit is connected to a power supply end of the relay, when the direct current signal circuit is electrified, the relay works to close the normally open contact, and a voltage port of the electric energy meter is connected to a secondary circuit of the corresponding bus voltage transformer. And the other bus side disconnecting link is disconnected, the corresponding direct current signal circuit is not electrified, the corresponding relay does not work, the secondary loop of the bus voltage inductor is isolated from the electric energy meter, and the metering secondary voltage switching is realized.
The prior technical scheme has the following problems:
firstly, the relay contact is a normally open contact, and the contact is closed to electrify the electric energy meter when the relay works. When the circuit and the main transformer are in a cold standby state and an overhaul state, the side knife switches of the buses are disconnected, the direct-current signal circuit is not electrified, and the two relays cannot work, so that the electric energy meter cannot be remotely and automatically read when the voltage is lost.
Secondly, in order to keep the contact closed, the direct current coil of the relay is always in a power-on working state, the direct current coil of the relay generates heat seriously, the aging of the relay is accelerated, and the aging and damage of the relay plastic material with longer running time are serious.
And thirdly, the direct current signal circuit power supply fault can cause the relay to work normally, and the metering fault is caused by the failure or insufficient suction force of the relay.
And fourthly, the relay contact may deform due to long-term compression joint to cause poor contact and metering failure.
And fifthly, the relay has various models. After the relay is damaged, the relay with the same model needs to be found for replacement, so that inconvenience is brought to later maintenance.
Sixthly, the relay group has more wiring, wiring is not intuitive, wrong wiring is easy to occur, and maintenance is not convenient.
SUMMERY OF THE UTILITY MODEL
The utility model provides a station electric energy measurement secondary voltage auto-change over device to solve the not enough of prior art.
In order to achieve the above object, the present invention provides the following technical solutions:
a plant station electric energy metering secondary voltage switching device comprises a shell, wherein the shell is formed by a front panel, a rear panel, an upper panel, a lower panel, a left panel and a right panel in a surrounding mode, and two groups of incoming line connecting assemblies which are identical in structure and are arranged in an up-down symmetrical mode and two groups of outgoing line connecting assemblies which are identical in structure and are arranged in an up-down symmetrical mode are arranged in the shell;
each group of the incoming line connecting assemblies comprises three incoming line connecting pieces which are transversely and 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 incoming line connecting pieces are supported by the two guide grooves and constrain a movement path, one ends of the three incoming line connecting pieces are respectively connected with one ends of insulating connecting rods, the other ends of the three incoming line connecting pieces are respectively provided with a hooking part, and the other ends of the insulating connecting rods are connected with first tension springs; a first insulation fixing plate is arranged between the two guide grooves and is respectively and fixedly connected with the three incoming line connecting sheets through fixing screws, a closing armature is arranged on the first insulation 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 sheets which are horizontally arranged in the transverse direction and are respectively an A-phase outgoing line connecting sheet, a B-phase outgoing line connecting sheet and a C-phase outgoing line connecting sheet;
the three outgoing line connecting sheets are fixed by a second insulating fixing plate, one ends of the three outgoing line connecting sheets are fixed on a rotating shaft seat respectively, and the other ends of the three outgoing line connecting sheets are provided with the hooking parts respectively; the second insulating fixing plate is connected with a second tension spring, and a support shaft is arranged in the acting force direction of the second tension spring; a tripping rod is arranged in the middle of the second insulating fixing plate and movably connected in a tripping frame, and a tripping pressure spring for driving the tripping rod to move upwards is sleeved on the tripping rod; 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 iron core of the electromagnetic trip device; the power supply loop of the electromagnetic trip iron core is connected with a direct-acting travel switch moving contact and a normally closed contact of a voltage loss monitor, and the power supply loop of the closing coil is connected in series with a direct-acting travel switch moving contact.
Further, in the plant station electric energy metering secondary voltage switching device, there are two first tension springs in each group of the incoming line connecting assembly, and the two first tension springs are symmetrically arranged between the insulating connecting rod and the right panel.
Furthermore, in the station electric energy metering secondary voltage switching device, support grooves for supporting the first insulating fixing plate are formed in the front panel and the rear panel;
the support groove positioned on the front panel is a visual support groove capable of displaying the internal closing state.
Furthermore, in the station electric energy metering secondary voltage switching device, a logo in a 'closing state' word is printed at the left side position of the visible support groove, and a logo in a 'opening state' word is printed at the right side position of the visible support groove.
Further, in the plant station electric energy metering secondary voltage switching device, the second tension spring in the upper group of outlet connecting assemblies is arranged between the second insulating fixing plate and the upper panel;
and the second tension spring in the lower group of the outgoing line connecting assemblies is arranged between the second insulating fixing plate and the lower panel.
Further, in the station electric energy measurement secondary voltage switching device, fixed slots for fixing the support shaft are respectively formed in the front panel and the rear panel.
Further, in the station electric energy metering secondary voltage switching device, the rotating shaft seat is fixed on the left panel.
Further, in the station electric energy metering secondary voltage switching device, the positions of the upper panel and the lower panel corresponding to the tripping rod are respectively provided with an opening for manual tripping.
Furthermore, in the station electric energy metering secondary voltage switching device, an opening is formed in the position, corresponding to the B-phase incoming line connecting sheet, of the right panel, so that manual switching-on can be performed.
Compared with the prior art, the embodiment of the utility model provides a following beneficial effect has:
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 need to be connected to the wiring, and a group of secondary voltage outgoing lines are connected to the electric energy meter;
2. the power consumption is low, the state is maintained by adopting a hook-and-loop mode and a tension spring, except that the low-power voltage loss monitor needs to be electrified for a long time to maintain the state, other electromagnetic coils are electrified to provide power only when the state needs to be changed, and the power supply is automatically cut off after the action is finished, so that the heating problem caused by the condition that an electromagnetic relay needs to be electrified for a long time to provide power to maintain the state is avoided;
3. the problems of virtual connection and poor contact are not easy to occur, reliable connection is ensured by adopting a hook-and-loop mode, and poor contact caused by deformation and the like when a compression joint mode is adopted is not easy to occur;
4. the problem that a device is disconnected with a metering secondary voltage loop and the problem that the electric energy meter cannot remotely read when the electric energy meter loses voltage due to the fact that a circuit and a main transformer are in cold standby or overhaul is solved.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings needed to be used in the description of the embodiments or the prior art will be briefly described below, it is obvious that the drawings in the following description are only some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to the drawings without inventive exercise.
Fig. 1 is a front view of a station electric energy metering secondary voltage switching device provided by an embodiment of the present invention;
fig. 2 is a top view of a station electric energy metering secondary voltage switching device provided by the embodiment of the present invention;
FIG. 3 is a left side view of the wire connecting portion of the wire outlet connecting piece in the embodiment of the present invention;
fig. 4 is a right side view of the wire connection portion of the inlet wire connection piece in the embodiment of the present invention.
Reference numerals:
the electromagnetic tripping device comprises an incoming line connecting piece 10, a guide groove 20, an insulating connecting rod 30, a first tension spring 40, a first insulating fixing plate 50, a switching armature 60, a switching coil 70, an outgoing line connecting piece 80, a second insulating fixing plate 90, a rotating shaft base 100, a second tension spring 110, a supporting shaft 120, a tripping rod 130, a tripping armature 140, an electromagnetic tripping device iron core 150, a direct-acting travel switch moving contact 160, a voltage loss monitor normally closed contact 170, a direct-acting travel switch moving contact 180, a voltage loss monitor coil 190, a supporting groove 200 and a fixing groove 210;
an A-phase incoming line connecting sheet 11, a B-phase incoming line connecting sheet 12 and a C-phase incoming line connecting sheet 13;
an A-phase outgoing line connecting sheet 81, a B-phase outgoing line connecting sheet 82 and a C-phase outgoing line connecting sheet 83.
Detailed Description
In order to make the objects, features and advantages of the present invention more obvious and understandable, the embodiments of the present invention are clearly and completely described with reference to the drawings in the embodiments of the present invention, and obviously, the embodiments described below are only some embodiments of the present invention, not all embodiments. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative efforts belong to the protection scope of the present invention.
In the description of the present invention, it is to be understood that when an element is referred to as being "connected" to another element, it can be directly connected to the other element or intervening elements may also be present. When a component is referred to as being "disposed on" another component, it can be directly on the other component or intervening components may also be present.
Furthermore, the terms "long", "short", "inner", "outer", and the like indicate orientations or positional relationships based on the orientations or positional relationships illustrated in the drawings, and are only for convenience of describing the present invention, but do not indicate or imply that the device or element referred to must have the specific orientation, operate in the specific orientation configuration, and thus, should not be construed as limiting the present invention.
The technical solution of the present invention is further explained by the following embodiments with reference to the accompanying drawings.
Example one
Referring to fig. 1 to 4, an embodiment of the present invention provides a station electric energy metering secondary voltage switching device, which includes a housing, the housing is enclosed by a front panel, a rear panel, an upper panel, a lower panel, a left panel and a right panel, and two sets of inlet wire connection assemblies having the same structure and arranged in a vertically symmetrical manner and two sets of outlet wire connection assemblies having the same structure and arranged in a vertically symmetrical manner are disposed in the housing;
each group of the incoming line connecting assemblies comprises three incoming line connecting pieces 10 which are transversely and horizontally arranged, 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 incoming line connecting pieces 10 are supported by the two guide grooves 20 and constrain a movement path, one ends of the three incoming line connecting pieces 10 are respectively connected with one ends of insulating connecting rods 30, the other ends of the three incoming line connecting pieces 10 are respectively provided with a hooking 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 respectively and fixedly connected with the three incoming line connecting pieces 10 through fixing screws, 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 assemblies comprises three outgoing line connecting pieces 80 which are horizontally arranged in the transverse direction and are respectively 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 outgoing line connecting sheets 80 are all fixed by a second insulating fixing plate 90, one ends of the three outgoing line connecting sheets 80 are respectively fixed on a rotating shaft seat 100, and the other ends of the three outgoing line connecting sheets 80 are respectively provided with the hooking parts; the second insulating fixing plate 90 is connected with a second tension spring 110, and a support 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 compression spring for driving the trip bar 130 to move upwards is sleeved on the trip bar 130; the part of the trip bar 130 exposed out of the trip frame is connected with one end of a trip armature 140, and the other end of the trip armature 140 is connected to an electromagnetic trip iron core 150 (the electromagnetic trip iron core 150 is wound with a coil); the power supply loop of the electromagnetic trip core 150 is connected with a direct-acting travel switch moving contact 160 and a normal-closed contact 170 of the voltage loss monitor, and the power supply loop of the closing coil 70 is connected in series with a direct-acting travel switch moving contact 180.
Preferably, there are two first tension springs 40 in each group of the incoming line connecting assemblies, and the two first tension springs 40 are symmetrically arranged between the insulating connecting rod 30 and the right panel.
Preferably, the front panel and the rear panel are both provided with a supporting groove 200 for supporting the first insulating fixing plate 50;
the support groove 200 on the front panel is a visual support groove capable of displaying an internal closing state.
The left side position of the visual supporting groove is printed with a logo in a 'closing state' word, and the right side position of the visual supporting groove is printed with a logo in a 'opening state' word.
Preferably, the second tension spring 110 in the upper group of the outlet connection assemblies is arranged between the second insulation fixing plate 90 and the upper panel;
the second tension spring 110 in the lower group of the outgoing line connection assemblies is arranged between the second insulation fixing plate 90 and the lower panel.
Preferably, the front panel and the rear panel are both 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 have openings corresponding to the trip bar 130, respectively, for manual tripping.
And the right panel is provided with an opening corresponding to the position of the B-phase incoming line connecting sheet 12 so as to perform manual switching-on.
It should be noted that, in a normal state, the incoming line connecting piece 10 is pulled to the right side of the switching device by the first tension spring 40, at this time, the incoming line connecting piece 10 is not connected with the outgoing line connecting piece 80, and the loop is in an open state.
When the bus side knife switch is closed, the direct current signal line is electrified, the closing coil 70 is electrified to attract the closing armature 60, so that the inlet wire connecting sheet 10 is pulled to move to the left side, and closing action is executed.
The upper and lower groups of outlet connection pieces 80 are connected in parallel in the same phase, and refer to fig. 3, that is, the first group of bus voltage transformer secondary lines a1, B1 and C1 are connected in parallel with the second group of bus voltage transformer secondary lines a2, B2 and C2 correspondingly: A1-A2, B1-B2 and C1-C2.
In a normal state, 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 axis of the rotating shaft seat 100 and the supporting shaft 120.
The outgoing line connecting sheets 80 of the A phase, the B phase and the C phase are fixed by the second insulating plate, synchronous motion of the three-phase outgoing line connecting sheets 80 is realized, when the circuit corresponding to a bus side knife switch is disconnected, a direct current signal circuit is in voltage loss and the other bus side knife switch is closed to electrify the other direct current signal circuit, the electromagnetic tripper iron core 150 is electrified to attract the tripping armature 140, and at the moment, the outgoing line edge connecting sheet rotates towards the direction far away from the supporting shaft 120 by taking the axis of the rotating shaft seat 100 as the center of a circle to be tripped with the incoming line connecting sheet 10. The incoming line connecting sheet 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-off contact 180 and a direct-acting travel switch moving-on contact 160. The direct-acting travel switch make-and-break contact 180 is kept in an on state in a normal state, and is connected to a power supply circuit of the closing coil 70 which performs a secondary circuit closing operation, and the direct-acting travel switch make-and-break contact 160 is kept in an off state in a normal state, and is connected to a power supply circuit of the electromagnetic trip core 150 which performs a trip operation.
In this embodiment, the power supply of the closing coil 70 is a local bus knife-switch dc signal power supply, the dc signal line is electrified after the bus knife-switch is closed, and the direct-acting travel switch moving-break contact 180 is in a closed state, and the closing armature 60 is electrified on the closing coil 70 to pull the incoming line connecting piece 10 and the outgoing line connecting piece 80 to close. Before the incoming line connecting piece 10 and the outgoing line connecting piece 80 are completely switched on, the direct-acting travel switch dynamic-breaking contact 180 collides with the first insulating fixing plate 50, so that the direct-acting travel switch dynamic-breaking contact 180 breaks a power supply loop of the switching-on coil 70, and the incoming line connecting piece 10 moves forwards due to inertia to enable the incoming line connecting piece 10 and the outgoing line connecting piece 80 to be completely switched on. The hooking part of the incoming line connecting piece 10 contacts with the hooking part of the outgoing line connecting piece 80 to push the outgoing line connecting piece 80 to rotate, so that the incoming line connecting piece 10 and the outgoing line connecting piece 80 are switched on. The outgoing line connecting piece 80 is pressed against the incoming line connecting piece 10 by means of the pulling force of the second pulling force spring 110, the direct-acting travel switch break contact 180 collides with the first insulating fixing 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 pulling force of the first spring, so that reliable connection is achieved.
The power supply of the electromagnetic release adopts another bus 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 iron core 150 of the electromagnetic release, and the normally closed contact 170 of the voltage loss monitor is recovered to be conducted after the direct-current signal line at the end is in voltage loss; the power circuit of the electromagnetic trip core 150 is connected in series to the direct-acting type travel switch moving contact 160 at the same time, and the direct-acting type travel switch moving contact 160 is conducted after the direct-acting type travel switch moving contact 180 collides with the first insulation fixing plate 50, indicating that the secondary voltage circuit is in a closing state. After the other bus side knife switch is switched on, the corresponding direct current signal circuit is electrified, the electromagnetic release performs the tripping action, the direct-acting travel switch resets after tripping, the power supply loop of the iron core 150 of the electromagnetic release is disconnected, and the power supply loop of the switching-on coil 70 is restored to be connected. The tripping executing condition comprises that a bus side knife switch corresponding to the end is disconnected, namely, the voltage loss monitor coil 190 loses voltage, the closing armature 60 resets under the pulling of the first tension spring 40, and the normally closed contact 170 of the voltage loss monitor restores conduction; the incoming line connecting sheet 10 and the outgoing line connecting sheet 80 are in a buckling state, namely the direct-acting travel switch moving contact 160 is conducted; and the other direct current signal line is electrified, namely the knife switch on the other bus side is switched on, and the direct current signal line corresponding to the operation of the primary system line and the main transformer is switched to the other bus to be electrified.
In the embodiment, a scheme that a mechanical structure is matched with an electromagnetic relay, a travel switch and other devices is adopted, and a design scheme that a microcontroller, an electronic relay (including other controllable devices capable of realizing voltage connection and isolation) and other semiconductor control devices are adopted can also be adopted. Because the metering secondary circuit has strict requirements on voltage drop, the electronic relay of the main device in the alternative scheme directly acts on the metering secondary voltage circuit and does not affect the voltage of the metering secondary circuit, including the voltage and the phase. The electronic relay should be able to achieve voltage isolation when switched off.
The embodiment of the utility model provides a pair of station electric energy measurement secondary voltage auto-change over device, realize the reliable switching to measurement secondary voltage, possess the simple characteristics of wiring, convenient to use maintains, solve circuit and main change simultaneously and be in cold reserve and the maintenance state can't long-range automatic the problem of checking meter with the electric energy meter decompression when relay group is as auto-change over device, and through adopting the hook-and-loop mode, need not the relay and be in actuation operating condition always, solve with the problem of generating heat and the contact problem when relay group is as auto-change over device.
The foregoing description of the embodiments has been presented 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 that particular embodiment, but, where applicable, are interchangeable and can be used in a selected embodiment, even if not specifically shown or described. The same elements or features may also vary in many respects. 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 those skilled in the art that specific details need not be employed, that example embodiments may be embodied in many different forms and that 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 technologies 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 intended to be 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 explicitly indicated as an order of performance. It should also be understood 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.). As used herein, the term "and/or" 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, use of terms such as the terms "first," "second," and other numerical values herein does not imply a sequence or order. Thus, 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," "… …," "lower," "above," "upper," and the like, may be used herein for ease of description to describe a relationship between one element or feature and one or more other elements or features as 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 an orientation of facing upward and downward. The device may be otherwise oriented (rotated 90 degrees or at other orientations) and the spatially relative descriptors used herein interpreted.
Claims (9)
1. The secondary voltage switching device for the power station electric energy metering is characterized by comprising a shell, wherein the shell is formed by a front panel, a rear panel, an upper panel, a lower panel, a left panel and a right panel in a surrounding mode, and two groups of incoming line connecting assemblies which are identical in structure and are arranged in an up-down symmetrical mode and two groups of outgoing line connecting assemblies which are identical in structure and are arranged in an up-down symmetrical mode are arranged in the shell;
each group of the incoming line connecting assemblies comprises three incoming line connecting pieces which are transversely and 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 incoming line connecting pieces are supported by the two guide grooves and constrain a movement path, one ends of the three incoming line connecting pieces are respectively connected with one ends of insulating connecting rods, the other ends of the three incoming line connecting pieces are respectively provided with a hooking part, and the other ends of the insulating connecting rods are connected with first tension springs; a first insulation fixing plate is arranged between the two guide grooves and is respectively and fixedly connected with the three incoming line connecting sheets through fixing screws, a closing armature is arranged on the first insulation 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 sheets which are horizontally arranged in the transverse direction and are respectively an A-phase outgoing line connecting sheet, a B-phase outgoing line connecting sheet and a C-phase outgoing line connecting sheet;
the three outgoing line connecting pieces are fixed by a second insulating fixing plate, one ends of the three outgoing line connecting pieces are fixed on the rotating shaft seat respectively, and the other ends of the three outgoing line connecting pieces are provided with the hooking parts respectively; the second insulating fixing plate is connected with a second tension spring, and a support shaft is arranged in the acting force direction of the second tension spring; a tripping rod is arranged in the middle of the second insulating fixing plate and movably connected in a tripping frame, and a tripping pressure spring for driving the tripping rod to move upwards is sleeved on the tripping rod; 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 iron core of the electromagnetic trip device; the power supply loop of the electromagnetic trip iron core is connected with a direct-acting travel switch moving contact and a normally closed contact of a voltage loss monitor, and the power supply loop of the closing coil is connected in series with a direct-acting travel switch moving contact.
2. The plant electric energy metering secondary voltage switching device of claim 1, wherein there are two first tension springs in each group of the incoming line connection assemblies, and the two first tension springs are symmetrically arranged between the insulating connection rod and the right panel.
3. The plant station electric energy metering secondary voltage switching device according to claim 1, wherein support grooves for supporting the first insulating fixing plate are formed in the front panel and the rear panel;
the support groove positioned on the front panel is a visual support groove capable of displaying the internal closing state.
4. The plant electric energy metering secondary voltage switching device according to claim 3, wherein a logo in a word of 'closing state' is printed at a left side position of the visible support groove, and a logo in a word of 'opening state' is printed at a right side position of the visible support groove.
5. The plant electric energy metering secondary voltage switching device of claim 1, wherein the second tension spring in the upper group of outlet connection assemblies is disposed between the second insulating fixed plate and the upper panel;
and the second tension spring in the lower group of the outgoing line connecting assemblies is arranged between the second insulating fixing plate and the lower panel.
6. The plant station electric energy metering secondary voltage switching device of claim 1, wherein fixing grooves for fixing the support shaft are formed in both the front panel and the rear panel.
7. The plant electric energy metering secondary voltage switching device of claim 1, wherein the rotating shaft seat is fixed on the left panel.
8. The plant electric energy metering secondary voltage switching device of claim 1, wherein the upper panel and the lower panel are respectively provided with an opening corresponding to the tripping rod for manual tripping.
9. The plant station electric energy metering secondary voltage switching device of claim 1, wherein the right panel is provided with an opening corresponding to the position of the B-phase incoming line connecting sheet for manual switching-on.
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| CN110412322A (en) * | 2019-09-10 | 2019-11-05 | 广东电网有限责任公司 | A kind of plant stand electrical energy measurement secondary voltage switching device |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110412322A (en) * | 2019-09-10 | 2019-11-05 | 广东电网有限责任公司 | A kind of plant stand electrical energy measurement secondary voltage switching device |
| CN110412322B (en) * | 2019-09-10 | 2024-03-19 | 广东电网有限责任公司 | Secondary voltage switching device for station electric energy metering |
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