CN220438524U - Monitoring and metering device - Google Patents

Abstract

The utility model belongs to the technical field of monitoring and metering of power systems, and discloses a monitoring and metering device. The device includes circuit breaker, monitoring and metering subassembly and mutual-inductor module, and the mutual-inductor module includes the mutual-inductor that the multiunit set up side by side, wears to locate the link plate and the base of mutual-inductor, and the mutual-inductor inlays and locates in the base, and link plate one end is connected with the leading-out terminal electricity of circuit breaker, and the other end is connected with the leading-in terminal electricity of monitoring and metering subassembly, and the secondary side and the monitoring and metering subassembly electricity of mutual-inductor are connected. The utility model can realize the modularization of the transformer and optimize the wire arrangement mode.

Description

Monitoring and metering device

Technical Field

The utility model relates to the technical field of monitoring and metering of power systems, in particular to a monitoring and metering device.

Background

Low voltage circuit breakers can be used in monitoring and metering devices for safe, economical operation of electrical power systems and operation of electrical power equipment.

At present, the monitoring and metering device cannot be directly connected into primary high-voltage equipment, but the large current of a primary system is firstly converted into small current in proportion, and the small current is supplied to a measuring instrument for use.

At present, in a multiphase power system, a plurality of groups of voltage transformers or current transformers are required to be configured, so that the problems of wire confusion and poor modularization degree are easily caused.

Disclosure of Invention

The utility model aims to provide a monitoring and metering device which can realize the modularization of a transformer and optimize a wire arrangement mode.

To achieve the purpose, the utility model adopts the following technical scheme:

a monitoring and metering device comprising:

a circuit breaker;

a monitoring and metering assembly;

the transformer module comprises a plurality of groups of transformers which are arranged in parallel, a connecting plate and a base, wherein the connecting plate and the base penetrate through the transformers, the transformers are embedded in the base, one end of each connecting plate is electrically connected with an outgoing end of the circuit breaker, the other end of each connecting plate is electrically connected with an incoming end of the monitoring and metering assembly, and a secondary side of each transformer is electrically connected with the monitoring and metering assembly.

As an alternative of the monitoring and metering device, through holes are respectively formed in the outer wall of each mutual inductor and correspond to the connecting plates, and the connecting plates penetrate through the through holes.

As an alternative scheme of the monitoring and metering device, a positioning groove is formed in the base, and the transformer is arranged in the positioning groove.

As an alternative to the monitoring and metering device, the transformer module further comprises an upper cover, and the upper cover is arranged on the positioning groove to seal the transformer.

As an alternative to the monitoring and metering device, the upper cover is provided with a lead terminal, the lead terminal is electrically connected with the transformer, and the lead terminal is electrically connected with the monitoring and metering assembly through a wire.

As an alternative scheme of the monitoring and metering device, one of the transformers is convexly provided with a lead boss, the top of the lead boss is provided with a terminal port, and each connecting terminal of the transformer can be led out from the terminal port along the inside of the transformer.

As an alternative to the monitoring and metering device, one end of the secondary winding of the transformer is grounded.

As an alternative scheme of the monitoring and metering device, the base is provided with a plurality of limit grooves, one end of the connecting plate penetrates through the base, and the other end of the connecting plate is embedded in the limit grooves.

As an alternative to the monitoring and metering device, one end of the coupling plate is provided with a fixing hole through which a fastener passes to be connected with the outlet of the circuit breaker.

As an alternative to the monitoring and metering device, the fixing hole is elongated.

The beneficial effects are that:

in the utility model, one end of the connecting plate is electrically connected with the leading-out end of the circuit breaker and is used for leading out primary side current or voltage, the primary side current or voltage is reduced in proportion through the transformer, and the secondary side of the transformer is electrically connected with the monitoring and metering assembly, so that the low-voltage or low-current electric signal is input into the monitoring and metering assembly for monitoring or metering; the base is used for positioning and fixing the mutual inductor and the connecting plate, and the mutual inductor in the monitoring and metering device is modularized by integrating a plurality of mutual inductors into one mutual inductor module.

Drawings

FIG. 1 is an isometric view of a monitoring and metering device provided by an embodiment of the present utility model;

fig. 2 is a schematic diagram of an assembled structure of a circuit breaker and a monitoring and metering assembly provided by an embodiment of the present utility model;

FIG. 3 is an isometric view of a monitoring and metering assembly provided by an embodiment of the present utility model;

FIG. 4 is a schematic diagram of a hidden cap monitoring and metering assembly according to an embodiment of the present utility model;

FIG. 5 is a schematic view of a hidden cap and fastener monitoring and metering assembly provided in an embodiment of the present utility model;

FIG. 6 is a schematic diagram of one wiring of a monitoring and metering device provided in an embodiment of the present utility model;

FIG. 7 is a schematic view of a mating structure of a base and a coupling plate provided by an embodiment of the present utility model;

FIG. 8 is a schematic view of a base according to an embodiment of the present utility model;

fig. 9 is an isometric view of a first view of a transformer provided by an embodiment of the present utility model;

fig. 10 is an isometric view of a second view of a transformer provided in an embodiment of the utility model.

In the figure:

1. a cabinet body; 11. a hanging plate;

2. a circuit breaker;

3. a monitoring and metering assembly;

4. a transformer module; 41. a transformer; 41-1, a first transformer; 41-2, a second transformer; 41-3, a third transformer; 411. a via hole; 412. a lead boss; 413. a terminal opening; 414. a guide table; 42. a connecting plate; 421. a fixing hole; 43. a base; 431. a positioning groove; 432. a limit groove; 44. an upper cover; 441. a lead terminal;

5. a fastener.

Detailed Description

The utility model is described in further detail below with reference to the drawings and examples. It is to be understood that the specific embodiments described herein are merely illustrative of the utility model and are not limiting thereof. It should be further noted that, for convenience of description, only some, but not all of the structures related to the present utility model are shown in the drawings.

In the description of the present utility model, unless explicitly stated and limited otherwise, the terms "connected," "connected," and "fixed" are to be construed broadly, and may be, for example, fixedly connected, detachably connected, or integrally formed; can be mechanically or electrically connected; can be directly connected or indirectly connected through an intermediate medium, and can be communicated with the inside of two elements or the interaction relationship of the two elements. The specific meaning of the above terms in the present utility model will be understood in specific cases by those of ordinary skill in the art.

In the present utility model, unless expressly stated or limited otherwise, a first feature "above" or "below" a second feature may include both the first and second features being in direct contact, as well as the first and second features not being in direct contact but being in contact with each other through additional features therebetween. Moreover, a first feature being "above," "over" and "on" a second feature includes the first feature being directly above and obliquely above the second feature, or simply indicating that the first feature is higher in level than the second feature. The first feature being "under", "below" and "beneath" the second feature includes the first feature being directly under and obliquely below the second feature, or simply means that the first feature is less level than the second feature.

In the description of the present embodiment, the terms "upper", "lower", "right", etc. orientation or positional relationship are based on the orientation or positional relationship shown in the drawings, and are merely for convenience of description and simplicity of operation, and do not indicate or imply that the apparatus or elements referred to must have a specific orientation, be constructed and operated in a specific orientation, and thus should not be construed as limiting the utility model. Furthermore, the terms "first," "second," and the like, are used merely for distinguishing between descriptions and not for distinguishing between them.

Referring to fig. 1 to 5, the present embodiment relates to a monitoring and metering device (hereinafter referred to as "device") including a circuit breaker 2, a monitoring and metering assembly 3, and a transformer module 4; wherein, circuit breaker 2, monitoring and metering subassembly 3 and mutual-inductor module 4 are all located in cabinet body 1, and mutual-inductor module 4 includes multiunit mutual-inductor 41 that sets up side by side, wears to locate the link plate 42 and the base 43 of mutual-inductor 41, and in base 43 was located in the mutual-inductor 41 was inlayed, link plate 42 one end was connected with the leading-out terminal electricity of circuit breaker 2, and the other end is connected with the leading-in terminal electricity of monitoring and metering subassembly 3, and the secondary side and the monitoring and metering subassembly 3 electricity of mutual-inductor 41 are connected.

In this embodiment, the cabinet body 1 is used to accommodate the circuit breaker 2, the monitoring and metering assembly 3 and the transformer module 4, the cabinet body 1 is a cavity cuboid with a switch door, a hanging plate 11 is arranged on the inner wall of the cabinet body 1, the circuit breaker 2 and the monitoring and metering assembly 3 are all fixed in the cabinet body 1 through the hanging plate 11, and specifically, the circuit breaker 2 and the monitoring and metering assembly 3 can be connected with the cabinet body 1 in a screwing manner; one end of the connecting plate 42 is electrically connected with the leading-out end of the circuit breaker 2 and is used for leading out primary side current or voltage, the primary side current or voltage is reduced in proportion through the transformer 41, and the secondary side of the transformer 41 is electrically connected with the monitoring and metering assembly 3, so that low-voltage or low-current electric signals are input into the monitoring and metering assembly 3 for monitoring or metering; the base 43 is used for positioning and fixing the transformers 41 and the connecting plate 42, and the embodiment integrates a plurality of transformers 41 into one transformer module 4, so that the transformer modularization in the monitoring and metering device is realized, and in addition, the connecting plate 42 is used as an outgoing end, so that the wire arrangement mode is optimized.

In this embodiment, the present apparatus realizes metering (billing), measurement and monitoring of the operation device through the monitoring and metering assembly 3, and in addition, through being used in cooperation with the circuit breaker 2, when a fault such as a short circuit or overload occurs in the power line, an off signal can be provided to the circuit breaker, and the fault circuit is cut off, so as to protect the safety of the power supply system and the operation device.

The monitoring and metering assembly 3, when measuring alternating high currents, often requires conversion of the high currents into relatively uniform low currents, illustratively into specified rated currents 5A or 1A; in addition, the direct measurement has a high risk factor due to a high voltage in the route to be measured, and current or voltage conversion is often required. In the prior art, multiple groups of mutual inductors are often matched and used in a complete set, the inside of the cabinet body 1 is not compact enough, and meanwhile, the wiring between the multiple groups of mutual inductors is messy, so that the wiring inside is not regular enough.

Referring to fig. 6, the present embodiment also provides a specific wiring mode of the device, and uses a three-phase four-wire kilowatt-hour meter as an example of the monitoring and metering assembly 3. The three-phase four-wire kilowatt-hour meter is provided with 1-11 wiring terminals, the power consumption circuit and the load respectively comprise an A phase, a B phase, a C phase and an N phase, and the mutual inductor 41 is provided with three groups which are respectively a first mutual inductor 41-1, a second mutual inductor 41-2 and a third mutual inductor 41-3. The first transformer 41-1, the second transformer 41-2 and the third transformer 41-3 respectively penetrate through the phase A, the phase B and the phase C of the electric wire using line and are respectively connected with the corresponding wiring terminals 2, 5 and 8 of the three-phase four-wire watt-hour meter, the corresponding wiring terminals 3, 6 and 9 are led out to form a closed loop, meanwhile, the wiring terminals 3, 6 and 9 are connected with the ground wire (equipment or cabinet body 1), the wiring terminals 1, 4 and 7 of the three-wire four-wire watt-hour meter are respectively connected with the outgoing line of the circuit breaker 2, the phase A, the phase B and the phase C of the electric wire using line are connected with the incoming line end of the circuit breaker 2, the phase N of the electric wire using line is connected with the wiring terminal 10 corresponding to the three-phase four-wire watt-hour meter, the phase A, the phase B and the phase C of the electric wire using line are simultaneously led out from the wiring terminal 11 and are connected with the phase A, the phase B and the phase C of the electric wire using line.

In this embodiment, the transformer 41 should be used with care that the secondary side of the transformer 41 is not allowed to open, and should always be a closed loop. Because when the transformer 41 is a current transformer, the primary-side current magnetic potential generates a magnetic flux Φ1 at the iron core; the current magnetic potential of the secondary side of the current transformer generates magnetic flux phi 2 at the iron core; iron core of the current transformer combines magnetic flux: Φ=Φ1+Φ2; since Φ1 and Φ2 are opposite in direction and equal in size and cancel each other out, Φ=0; if the secondary side is open, then: the iron core of the current transformer has strong magnetic flux, magnetic saturation occurs, the iron core continuously heats, insulation is burnt out, and electric leakage is generated; meanwhile, phi generates very high induced potential in the secondary coil of the current transformer, high voltage is formed at two ends of the secondary coil of the current transformer, life safety of operators is endangered, and in other embodiments, the situation that a fuse is not allowed to be connected in a secondary side loop of the high-voltage dangerous current transformer is prevented, and devices such as an ammeter, a relay and the like are not allowed to be detached without bypass in operation is avoided.

Optionally, one end of the secondary winding of the transformer 41 is grounded. The high-voltage danger can be prevented, and the safety of the device is improved.

Referring further to fig. 4 and 5, optionally, a fixing hole 421 is formed at one end of the coupling plate 42, and the fastener 5 is connected to the outgoing terminal of the circuit breaker 2 through the fixing hole 421. The fastener 5 is exemplified by a screw, which passes through the fixing hole 421 to be screwed with the outgoing terminal of the circuit breaker 2, and the connection manner is simple and convenient.

Further, the fixing hole 421 has a long bar shape. By forming the fixing hole 421 in a long bar shape, the coupling plate 42 can be easily adjusted in position along the extending direction of the fixing hole 421.

Referring to fig. 7 and 8, optionally, a positioning groove 431 is formed in the base 43, and the transformer 41 is disposed in the positioning groove 431. The number of the positioning grooves 431 is matched with the number and the shape of the mutual inductors 41, and the positioning grooves 431 can facilitate the positioning of the mutual inductors 41 and the assembly of the whole mutual inductor module 4.

With continued reference to fig. 2 and 3, the transformer module 4 optionally further includes an upper cover 44, where the upper cover 44 covers the positioning slot 431. By enabling the upper cover 44 to cover the setting position groove 431, the mutual inductor 41 is sealed inside the mutual inductor module 4, and a plurality of mutual inductors 41 of the multiphase circuit form a sealed modularized whole, so that the integrated assembly is convenient. In addition, the upper cover 44 is provided with an avoidance groove for avoiding the other end of the connecting plate 42, so that the other end of the connecting plate 42 is convenient for wiring.

Optionally, the upper cover 44 is provided with a lead terminal 441, the lead terminal 441 is electrically connected with the transformer 41, one end of a wire can be plugged into the lead terminal 441, and the other end of the wire can be electrically connected with the monitoring and measuring assembly 3. In this embodiment, the lead terminal 441 is disposed on the side wall of the upper cover 44 close to the monitoring and measuring assembly 3, so as to be electrically connected with the monitoring and measuring assembly 3 directly through a wire.

Further, a lead boss 412 is provided on one of the transformers 41, a terminal opening 413 is provided on the top of the lead boss 412, and the connection terminal of each transformer 41 can be led out from the terminal opening 413 along the inside of the transformer 41. Through protruding lead wire boss 412 that is equipped with on transformer 41, a plurality of binding posts that make a plurality of transformers 41 can concentrate and offer the terminal mouth 413 and draw forth from the top of lead wire boss 412, can further optimize the winding displacement mode, make the circuit arrange more regular.

Optionally, the base 43 is provided with a plurality of limiting grooves 432, one end of the connecting plate 42 is penetrated through the base 43, and the other end is embedded in the limiting grooves 432. The shape of the limit groove 432 is matched with the shape of the other end of the connecting plate 42, and in order to facilitate the wiring of the other end of the connecting plate 42, an opening is formed in the other end of the connecting plate 42, so that the wire can be electrically connected in a remembering way by using a fixing piece.

Referring to fig. 9 and 10, alternatively, a via 411 is disposed on an outer wall of each transformer 41 corresponding to the connection plate 42, and the connection plate 42 is disposed through the via 411. In this embodiment, corresponding to the three transformers 41, three through holes 411 are provided in total, the connecting plates 42 respectively pass through the through holes 411, the through holes 411 are elongated holes, the width of the through holes is slightly larger than that of the connecting plates 42, and guide platforms 414 are provided in the circumferential direction of the through holes 411 in a protruding manner to the outer sides of the transformers 41 for supporting and facilitating the introduction of the connecting plates 42.

It is to be understood that the above examples of the present utility model are provided for clarity of illustration only and are not limiting of the embodiments of the present utility model. Various obvious changes, rearrangements and substitutions can be made by those skilled in the art without departing from the scope of the utility model. It is not necessary here nor is it exhaustive of all embodiments. Any modification, equivalent replacement, improvement, etc. which come within the spirit and principles of the utility model are desired to be protected by the following claims.

Claims (10)

1. Monitoring and metering device, characterized in that it comprises:

a circuit breaker (2);

a monitoring and metering assembly (3);

the transformer module (4) comprises a plurality of groups of transformers (41) which are arranged in parallel, a connecting plate (42) penetrating through the transformers (41) and a base (43), wherein the transformers (41) are embedded in the base (43), one end of each connecting plate (42) is electrically connected with a leading-out end of the circuit breaker (2), the other end of each connecting plate is electrically connected with a leading-in end of the monitoring and metering assembly (3), and a secondary side of each transformer (41) is electrically connected with the monitoring and metering assembly (3).

2. The monitoring and metering device according to claim 1, characterized in that a via (411) is provided on the outer wall of each transformer (41) in correspondence of the coupling plate (42), respectively, the coupling plate (42) being threaded through the via (411).

3. The monitoring and metering device according to claim 1, characterized in that a positioning groove (431) is provided in the base (43), and the transformer (41) is provided in the positioning groove (431).

4. A monitoring and metering device according to claim 3, characterized in that the transformer module (4) further comprises an upper cover (44), the upper cover (44) covering the positioning slot (431) to enclose the transformer (41).

5. The monitoring and metering device according to claim 4, characterized in that a lead terminal (441) is provided on the upper cover (44), the lead terminal (441) being electrically connected with the transformer (41), the lead terminal (441) being electrically connected with the monitoring and metering assembly (3) by a wire.

6. The monitoring and metering device according to claim 1, characterized in that one of the transformers (41) is provided with a protruding lead boss (412), a terminal opening (413) is provided at the top of the lead boss (412), and the connection terminal of each transformer (41) can be led out from the terminal opening (413) along the inside of the transformer (41).

7. The monitoring and metering device according to any of claims 1 to 6, characterized in that one end of the secondary winding of the transformer (41) is grounded.

8. The device according to any one of claims 1 to 6, wherein the base (43) is provided with a plurality of limiting grooves (432), one end of the connecting plate (42) is arranged on the base (43) in a penetrating manner, and the other end of the connecting plate is embedded in the limiting grooves (432).

9. The monitoring and metering device according to any of claims 1 to 6, characterized in that one end of the coupling plate (42) is provided with a fixing hole (421), through which fixing hole (421) a fastener (5) is connected to the outlet of the circuit breaker (2).

10. The monitoring and metering device according to claim 9, characterized in that the fixing hole (421) is elongated.