WO2014060180A1

WO2014060180A1 - Installation arrangement with a current converter and measuring arrangement

Info

Publication number: WO2014060180A1
Application number: PCT/EP2013/069604
Authority: WO
Inventors: Andreas Senger; Jürgen HOBEIN; Carsten THÖRNER
Original assignee: Phoenix Contact Gmbh & Co. Kg
Priority date: 2012-10-16
Filing date: 2013-09-20
Publication date: 2014-04-24
Also published as: DE102012109869B3

Abstract

The invention relates to an installation arrangement (5) for detachably mounting a current converter (7) on a busbar (3) run through a passage opening of the current converter (7), the installation arrangement having: the current converter (7); a receiving element (9) attached or attachable to the current converter (7); an electrically conductive mounting element (13), adjustable along the longitudinal axis thereof and run through the receiving element (9) in order to fix the current converter (7) on the busbar (3) at the end of the current converter facing the busbar (3); and a contacting element (17) having a substantially annular connecting region (19), an electrical connection element (21) and an electrical conductor (23). The mounting element (13) is run through the connecting region (19) and the connection element (21) is in electrical contact with the mounting element (13) via the conductor (23). The invention also relates to a measuring arrangement (1) having such an installation arrangement (5) and a busbar (3), wherein the installation arrangement (5) is attached to the busbar (3).

Description

Mounting arrangement with a current transformer and measuring arrangement

The present invention relates to a mounting arrangement for releasably securing a current transformer to a guided through a passage opening of the current transformer

Busbar. The present invention further relates to a measuring arrangement with such a mounting arrangement and a busbar, wherein the mounting arrangement on the

Busbar is attached.

From the prior art mounting arrangements with a current transformer are known to the current transformer on a

Current conductor, usually a busbar, too

Fasten. The current transformer has a passage opening for the insertion of the busbar. Furthermore, the mounting arrangement comprises a receiving element, which is guided through the passage opening and has a respective fastening element on both sides of the current transformer. The fastener is usually designed as a screw or threaded pin. The mounting arrangement may also be used with a bus bar as a measuring arrangement to measure currents in any conductors connected to the bus bar. The bus bar is known in its electrical properties so that measurements can be easily made.

For attachment, the screws or the threaded pins are adjusted in the longitudinal direction in the direction of the conductor until they rest with one end on the surface of the busbar and the busbar is held between a wall of the passage opening and the screws or setscrews. Accordingly, the receiving element is integral with the current transformer, can be attached to the current transformer, or designed as a separate component, which is supported in the attached state in the passage opening and on the busbar. The receiving element is

Usually designed so that the attachment to the busbar is reversible by the fasteners are adjusted in the opposite direction.

For energy measurement, in addition to measuring the current through the busbar, it is necessary to tap a potential at the current conductor. In the measuring arrangement, the potential at the busbar in the region of the current transformer is tapped. This is usually an electrical

Measuring line by means of a ring cable lug under a

Screw attached to the busbar. In the

Measuring arrangement with the busbar, it is customary that the screws are screwed in fastening screws of the busbar for attaching the conductor. MIO fixing screws are widely used here, into which M5 screws for fastening the ring cable lug are screwed. Alternatively, separate terminals can be used to pick up voltages on live conductors.

At this mounting arrangement and measuring arrangement is

disadvantageous that the voltage tap is not touch safe. The measuring line itself is usually called

short-circuit proof lead, resulting in increased costs. Also, the workload for the compression of the short-circuit proof measuring line with the

Ring cable lug elaborately. Also, the attachment and

Attachment of the measuring line very expensive, and it must be provided a plurality of different parts. Special fastening screws with integrated internal thread for screwing in the screws for holding the ring cable lug are expensive to manufacture and therefore associated with high costs. Based on the above-mentioned prior art, the invention is therefore the object of a

To provide a mounting arrangement of the above type, which allows easy mounting on the conductor, has low installation and parts costs and improves safety during installation and operation.

The object is achieved by the features of the independent claims. advantageous

Embodiments of the invention are specified in the subclaims.

According to the invention thus a mounting arrangement for

releasably securing a current transformer to a guided through a passage opening of the current transformer

Busbar indicated. The mounting arrangement comprises the current transformer, a receiving element attached or attachable to the current transformer, an electrically conductive one passed through the receiving element

Fastener, along its longitudinal axis

is adjustable to the current transformer with its the

Busbar end facing to fix the busbar, and a contacting element, the one in the

Essentially annular connection area, a

having electrical connection element and an electrical conductor. The fastener is through the

Led connecting region, and the connecting element is via the conductor in electrically conductive contact with the fastening element.

According to the invention further comprises a measuring arrangement with a mounting arrangement and a busbar indicated above indicated, wherein the mounting arrangement is attached to the busbar.

The basic idea of the present invention is therefore that

Perform mounting arrangement with a voltage tap, which is automatically provided when mounting the current transformer to the power rail. Thus omitted

additional mounting steps for providing the potential of the bus bar, and additional components or tools for providing the potential are not required. Also, no additional work on the busbar must be done. The connection of

Test leads to the mounting arrangement or the

Measuring arrangement is limited to work on the mounting arrangement, whereby the safety is increased.

The voltage tap is via the connection element of the contacting element, which is preferably designed as a terminal, in particular as a screw or spring terminal. Alternative embodiments of the connection element

for example as a plug or socket or other

Connection types are also possible. The

Contacting element may be axially fixed or displaceable attached to fastening element. Likewise, the contacting element can be fixedly or rotatably attached to the fastening element in the circumferential direction. The adjustment of the fastener can be carried out in different ways, for example by a direct displacement or a screw movement, which is converted into an axial displacement. Also, that can

Receiving element and the fastening element to be executed to allow a simultaneous or alternative displacement and screwing of the fastener. According to a preferred embodiment of the invention it is provided that the contacting element is at least partially designed with an insulating housing. The insulation forms a contact protection in the region of the contacting element and causes an increase in the

Safety during operation and assembly of the mounting arrangement as well as the measuring arrangement.

According to a preferred embodiment of the invention, it is provided that the conductor is designed short-circuit proof. The short-circuit proof conductor enables reliable operation of the mounting arrangement as well as the measuring arrangement. A separate protection of the conductor is not

required. To connect to the short-circuit proof

The conductor is also a short-circuit proof lead connected to the terminal.

According to a preferred embodiment of the invention it is provided that the contacting element comprises an electrical fuse element which is arranged in the conductor or between the conductor and the connection element. The securing element is preferably in a holder

arranged so that it is easily replaceable. The

Fuse element can be designed arbitrarily to ensure protection against short circuit. The

Securing element is preferably designed as a fuse. With the fuse element, the conductor may be designed to carry only a current until hedging by the fuse element. There are no additional requirements for the leader or the

Connecting element downstream electrical components. Thus, common, low-cost components of

Connection technology can be used, whereby the parts costs are reduced. According to a preferred embodiment of the invention it is provided that the fastening element is designed at its end facing away from the busbar with an actuating head for an operation for adjusting the fastening element. Thereby, the mounting assembly can be efficiently attached to the busbar or detached therefrom. The actuating head may, for example, be designed in the manner of a rotary wheel in order to carry out a screw movement of the fastening element. The actuating head is preferably integrally connected to the fastening element. More preferably, the actuating head is made in one piece with the fastener and is on his

Exterior surface executed with an insulating material.

According to a preferred embodiment of the invention it is provided that the contacting element between the actuating head and the receiving element is clamped. Thus, the contacting element can be reliably fixed, and a reliable and continuous contacting of the fastening element by the contacting element is ensured. When the receiving element with a

additional holding element is executed, and that

Fastening element is guided in the holding element, the contacting element is preferably between the

Actuator and the holding element clamped.

According to a preferred embodiment of the invention it is provided that the conductor is arranged in the connecting region on the side facing the actuating head, and the connecting region and / or the actuating head is designed as an electrical conductor. Accordingly, when being clamped by the operating head, the conductor is clamped between the connecting portion and the operating head. there the contacting element between the receiving element and the actuating head can be clamped to effect the clamping of the conductor, or the contacting element is fixed or fixable in the axial direction on the fastening element. In this case, the conductor can be clamped directly between the connecting portion and the operating head. About the connection area or the

Actuator head can the potential of the

Fastener to be connected to the conductor. For isolation, the connection area at its

Circumferential surface be carried out with an insulating material, for example in the form of an insulating coating. Also, the actuating head may be embodied on its circumferential surface and on its outer head surface with an insulating material, for example in the form of a

insulating coating.

According to a preferred embodiment of the invention, it is provided that the contacting element is designed with a sleeve on the side of the connecting region facing the actuating head, and the inner diameter of the sleeve is greater than the outer diameter of the sleeve

Actuator is. Thus, the actuating head can be inserted into the sleeve when moving in the direction of the contacting element. Preferably, the inner diameter of the sleeve is only slightly larger than the outer diameter of the actuating head, so that the sleeve reliably prevents contact of the outer peripheral surface of the actuating head. More preferably, the sleeve is made of an insulating material, so that it forms an insulation of the actuating head.

According to a preferred embodiment of the invention it is provided that the connection region has an axial Passage whose width is substantially the

Diameter of the fastener corresponds. Thus, the fastener can be inserted not only in the axial direction in the connection region, but also by a movement in the radial direction. If the width of the passage is less than the diameter of the

Fastening element is a snap fit

respectively . According to a preferred embodiment of the invention it is provided that the receiving element and the

Fastener are held together in the manner of a quick fastening, so that the fastener is axially displaceable in a quick-attaching mode and is axially movable in a normal mode with a screw movement. They are different forms of

Quick attachment known, on the one hand to attach the current transformer quickly to the busbar and can

On the other hand, a reliable attachment of

To cause current transformer on the power rail.

For example, the receiving element may have a holding element, in which the fastening element is guided, wherein the holding element in the longitudinal direction or the

Fastening element is displaceable in the retaining element to allow a quick adjustment of the fasteners. Furthermore, the fastener can be made with a thread and in a thread of the

Be guided holding element. This can do that

Fastener by a screw movement

Reliable and with a great force cause the clamping of the busbar.

According to a preferred embodiment of the invention it is provided that the fastening element at its Outer circumference is at least partially carried out with an insulation. As a result, a touch protection of

Attachment provided. In the

Quick attachment, the contact protection on the

Holding element done. The retaining element is preferably made of an insulating material.

The invention will be explained in more detail with reference to the accompanying drawings with reference to preferred embodiments.

Show it

1 is a schematic representation of a measuring arrangement with a mounting arrangement and a busbar according to a first embodiment in FIG

Side View,

Fig. 2 is a schematic detail view of the measuring arrangement of Fig. 1 with a fastener, a

Contacting element and a holding element,

Fig. 3 is a schematic representation of the

Contacting element in a plan view, and

4 is a schematic representation of a measuring arrangement according to a second embodiment with a fastening element, a contacting element and a holding element in a side view.

FIGS. 1 to 3 show a measuring arrangement 1 according to a first embodiment of the invention. The measuring arrangement 1 comprises a busbar 3 and a mounting arrangement 5, which will be explained in detail later. The mounting arrangement 5 comprises a current transformer 7 with a passage opening, not shown in the figures, through which the busbar 3 is guided. The

Mounting arrangement 5 further comprises an on the

Current transformer 7 attached receiving element 9, which also extends through the passage opening.

At both axial ends of the receiving element 9, a respective holding element 11 is slidably held along its longitudinal axis. The holding elements 11 are made of an electrically insulating material and perpendicular to

Busbar 3 is arranged. By the holding member 11, an electrically conductive fastening element 13 is guided in each case. Retaining element 11 and fastening element 13 are designed with corresponding threads, so that the fastening element 13 in each case by a screw movement along its longitudinal axis in the holding element 11

is adjustable. Accordingly, the fasteners 13 in the manner of a quick attachment over the

Holding elements 11 held on the receiving element 9, wherein the axial displacement of the holding element 11 a

Quick attachment mode and the axial adjustment of the fasteners 13 with a screw movement corresponds to a normal mode. The quick fixation of the first

Embodiment may, in alternative embodiments, be known by others known in the art

Quick attachments are replaced. The fastening elements 13 are at their end remote from the busbar 3 each executed with an actuating head 15, which are designed in the manner of a rotary knob. Each actuating head 15 is designed in one piece with the corresponding fastening element 13. Everyone Actuator 15 is designed as an electrical conductor and has on its peripheral surface and its end face an insulating material in the form of a

Plastic coating on. About the actuating head 15, an operation for adjusting the

Attachment 13 done.

The mounting arrangement 5 further comprises a

Contacting element 17, which is a substantially

annular connecting portion 19, an electrical

Connection element 21, an electrical conductor 23 and an insulating housing 25 has. The electrical conductor 23 is short-circuit proof and partially in the

insulating housing 25 out. The terminal 21 is partially disposed in the housing 25 and electrically connected to the conductor 23. The connecting element 21 is designed as a screw terminal. The connecting portion 19 is made of an electrically conductive material and annular. The connecting portion 19 has at its

Peripheral surface of an insulating material in the form of a

Plastic coating on. The conductor 23 is designed at its end opposite the connecting element 21 with an eyelet 29. The contacting element 17 is on the

Actuator 15 side facing the

Connecting portion 19 with a sleeve 27 of a

made of insulating plastic material. Of the

Inner diameter of the sleeve 27 is slightly larger than the outer diameter of the actuating head 15th Das

Fastener 13 is guided by the connecting portion 19 and the sleeve 27. The contacting element 17 is in this

Embodiment with the connecting portion 19 axially displaceable and rotatable in the circumferential direction

Attachment element 13 attached.

It is described below how the current transformer 7 is fixed to the busbar 3.

First, the busbar 3 is inserted into the passage opening of the current transformer 7. Subsequently, in the quick-attach mode, the holding elements 11 with the

Fixing elements 13 axially displaced against the busbar 3. Subsequently, in the normal mode, the fastening elements 13 are moved axially by a screw movement over the actuating heads in order to fix the current transformer 7 to the busbar 3.

When attaching the current transformer 7 to the busbar 3, the actuating head 15 is inserted into the sleeve 27. When the actuating head 15 comes into abutment with the connecting region 19, the contacting element 17 is pressed against the retaining element 11 and clamped between the retaining element 11 and the actuating head 15. In this case, the eyelet 29 of the conductor 23 is clamped between the connecting region 19 and the actuating head 15, so that the conductor 23 via the fastening element 13 and the connecting portion 19 and the actuating head 15 with the busbar. 3

connected and at their potential. Thus, a potential tap on the connecting element 21 with the

Potential of the busbar 3 is provided

In an alternative embodiment this is

Receiving element 9 designed as a separate component which can be attached to the current transformer 7. In another Alternative embodiment, the receiving element 9 is also designed as a separate component, which is supported in the attached state in the passage opening and on the busbar 3 and thus attachment of the

Current transformer 5 causes the busbar 3.

FIG. 4 relates to a measuring arrangement 1 according to a second embodiment. The measuring arrangement 1 of the second

Embodiment is substantially the same as that of the first embodiment, therefore

The measuring arrangement 1 of the second embodiment

differs from that of the first

Embodiment only in the embodiment of

Contacting element 17, which is an electrical

Securing element 31, designed as a fuse comprises. The fuse element 31 is arranged via a holder, not shown, in the conductor 25. Due to the securing element 31, it is not necessary to make the conductor short-circuit-proof from the fuse element 31.

Reference sign list

Measuring arrangement 1

Busbar 3 mounting arrangement 5

Current transformer 7

Receiving element 9

Holding element 11

Fastening element 13 actuating head 15

Contacting element 17

Connection area 19

Connection element 21

Conductor 23 housing 25th

Sleeve 27

Eyelet 29

Securing element 31

Claims

claims

1. mounting arrangement (5) for releasably securing a current transformer (7) to a through a passage opening of the current transformer (7) guided busbar (3)

the current transformer (7),

a receiving element (9) attached or attachable to the current transformer (7),

a through the receiving element (9) passed, electrically conductive fastener (13) which is adjustable along its longitudinal axis to fix the current transformer (7) with its the busbar (3) facing the end of the busbar (3), and

a contacting element (17) having a

Substantially annular connecting portion (19), an electrical connection element (21) and an electrical conductor (23), wherein

the fastener (13) through the

Connection region (19) is guided, and

the connection element (21) is in electrically conductive contact with the fastening element (13) via the conductor (23).

2. Mounting arrangement (5) according to claim 1, characterized

marked that

the contacting element (17) is at least partially designed with an insulating housing (25).

3. Mounting arrangement (5) according to one of claims 1 or 2, characterized in that

the conductor (23) is short-circuit proof.

4. Mounting arrangement (5) according to one of the preceding claims, characterized in that

the contacting element (17) is an electrical

Comprising fuse element (31) which is arranged in the conductor (23) or between the conductor (23) and the connection element (21).

5. Mounting arrangement (5) according to one of the preceding claims, characterized in that

the fastener (13) at its the

Busbar (3) facing away from the end with an actuating head (15) for an operation for adjusting the

Fastening element (13) is executed.

6. Mounting arrangement (5) according to one of the preceding claims, characterized in that

the contacting element (17) between the

Actuating head (15) and the receiving element (9) can be clamped.

7. Mounting arrangement (5) according to one of the preceding claims 5 or 6, characterized in that

the conductor (23) is arranged in the connecting region (19) on the side facing the actuating head (15), and

the connection area (19) and / or the

Actuating head (15) is designed as an electrical conductor.

8. Mounting arrangement (5) according to one of the preceding claims 5 to 7, characterized in that

the contacting element (17) on the

Actuator (15) facing side of the Connecting region (19) with a sleeve (27) is executed, and

the inner diameter of the sleeve (27) is greater than the outer diameter of the actuating head (15).

9. Mounting arrangement (5) according to one of the preceding claims, characterized in that

the connecting region (19) has an axial passage whose width substantially corresponds to the diameter of the fastening element (13).

10. Mounting arrangement (5) according to one of the preceding claims, characterized in that

the receiving element (9) and the fastening element (13) are held together in the manner of a quick fastening, so that the fastening element (13) is axially displaceable in a quick-fastening mode and is axially movable in a normal mode with a screw movement.

11. Mounting arrangement (5) according to one of the preceding claims, characterized in that

the fastening element (13) is embodied on its outer circumference at least partially with an insulation.

12. measuring arrangement (1) with a mounting arrangement (5) according to one of the preceding claims and a busbar (3), wherein the mounting arrangement (5) on the busbar (3) is mounted.