WO2012041655A1

WO2012041655A1 - Consumer branch for an electrical distribution unit

Info

Publication number: WO2012041655A1
Application number: PCT/EP2011/065295
Authority: WO
Inventors: Sven Obenaus; Sven Obigt
Original assignee: Siemens Aktiengesellschaft
Priority date: 2010-09-30
Filing date: 2011-09-05
Publication date: 2012-04-05
Also published as: DE102010041829A1

Abstract

The invention relates to a consumer branch (5; 7) for an electrical distribution unit (1), particularly a motor branch for a low voltage switchgear, having an infeed contact system (34; 134) for contacting a main electrical circuit, an output contact system (34; 234) for contacting the main electrical circuit, and having a labeling means (40; 140) for labeling a disconnected position of the consumer branch (5; 7) in the electrical distribution unit (1), wherein the infeed contact system (34; 134) and the output contact system (34; 234) are separated from the main electrical circuit. In order to configure the labeling of the disconnected position of the individual consumer branches in the electrical distribution unit even more safely, according to the invention, the labeling means (40; 140) comprises a first segment (41; 141) designed as a mechanical barrier, preventing the infeed contact system (34; 134) and/or the output contact system (34; 234) from contacting the main electrical circuit.

Description

description

Load feeder for a power distribution unit

The invention relates to a load feeder for a power distribution unit, in particular a motor feeder for a low-voltage switchgear, with a feeder contact system for contacting a main circuit, an outgoing contact system for contacting the main circuit and with a marking means for identifying a disconnected position of the load feeder in the power distribution unit, where the feeder contact system and the feeder contact system are separate from the main circuit.

For electrical operation of consumers - ie devices (machines) or facilities (plants), the electrical energy into another, non-electrical form of energy umwan ^¬ spindles (eg motors) are such load feeders (eg motor feeders) in power distribution units in the form of low-voltage Switchgear used. The circuit of such a load feeder is divided into a first circuit and a second circuits. Here, the first circuit by means of the feed-contact system and the outgoing contact system with the main flow circuit to a ^¬ is connectable. On the other hand, the second circuit with ^¬ means of a control contact system with a control circuit is connected.

The first circuit includes the main circuit devices - that is usually the switching and protective devices such as power scarf ^¬ ter, fuses, contactors and overload relays and the zugehö ^¬ ring current paths. The second circuit of a load feeder includes all devices and wiring for controlling its main circuit devices. This includes the connection of control ^{¬ points} - ie the connection of input and display devices for the operator - to control directly on the load feeder, for remote control from a control room (often referred to as automatic control) or for on-site control directly on Consumer (eg on the engine). The second circuit also includes a specific logic for the load feeder and locking its main circuit devices - in a Mo ^¬ torabzweig thus in particular the specific logic and Ver ^¬ locking the main circuit devices that are used to switch the je ^¬ respective engine, this often one or more shooters are. Set to different values of parameters of a parameter set, the control circuit accordingly implements various control functions for controlling the load feeder.

The energy distributor S8 from Siemens AG is a power distribution unit that has various such load feeders.

The marking of the safe separation position of such

Load feeders in low-voltage switchgear are customary in practice for commissioning and service purposes of individual load feeders. Write provisions in particular na ^¬ tional trade organization for such activities appropriate actions before (unlock it, verify that no current, earth and protect against restart). The safest form of the free shifting in current manifold pure ^¬ units, the separating position of the load feeders (eg. As the motor feeders in the form of plug-in modules). In the load feeders known from the named energy distributor S8 of Siemens AG, the identification of the disconnected position of the individual load feeders in the power distribution unit is effected by a variant of a mechanically colored indication of the position of the load feeder. This indication can only be recognized directly on the individual load feeders, since this is a relatively small display window, in which a green field with the imprint "0" is displayed in the disconnected position whether and which of the load feeders are in their disconnected position.

An alternative variant with other power distribution units known from practice is a spatially remote one

Disconnected position. For this, the respective load feeder is drawn a few centimeters from the plant and in accordance with fi xed ^¬. At the front of the power distribution unit these load feeders are now clearly recognizable by their protrusion from the contour of the front of the power distribution unit as in their disconnected position. A disadvantage of this alternative solution is the repeal of the IP protection and arc fault safety of the power distribution unit. In both variants, warning signs such as "Do not switch, it is working" must continue to be used to comply with the above-mentioned regulations.

Starting from a load feeder with the features of the preamble of claim 1, it is an object of He ^¬ invention to make the identification of the disconnected position of the individual load branches in a power distribution unit still si ^¬ cherer. This object is achieved in that the identification ^¬ medium has a designed as a mechanical barrier Ers th section, which prevents contact of the feed contact system and / or the outgoing contact system with the main circuit.

In such an embodiment, the risk of confusion by incorrectly operating indicators or by wrong signage of the load feeders is safely excluded ^¬ . In this case, the IP protection and the Störlicht ^¬ arc security of the system are maintained, because the labeling medium can be attached to a correspondingly closed Stromverteilerein unit. An additional marking by signs is not required.

Further advantageous embodiments of the load feeder according to the invention are given in the dependent claims 2 to 5 to ^¬ .

Claims 6 and 7 relate to a power distribution unit, in particular a low-voltage switchgear, with such a load feeder.

In particular, it is provided according to an advantageous embodiment of the invention that the one provided with a warning symbolism or warning inscribed second section of ^¬ Kenn ^¬ drawing means for identifying the disconnected position of the load feeder on the front side of the load branch protrudes so that it clearly recognizable on the front of the Stromver ^¬ divider unit is.

The load feeder can be even more reliably secured against reconnection by the identification means, if the first section, designed as a mechanical barrier, additionally contacts a control contact system with a control circuit, which prevents contacting of a control circuit.

Another cost-effective, simple production engineering embodiment provides that the identification means is formed as a one-piece, made of insulating plastic inserts. In this case, the first portion of the Kenn ^¬ drawing means plate-like and the second section fah ^¬ nenartig be formed.

The label can be placed on ^¬ assembly technology very easily on the load feeder or a consumer receiving the ^¬ cherabzweig compartment of the Power Distribution Unit. But it is also possible that labeling ^¬ medium between the load feeder and the tray to hal ^¬ th.

Two embodiments of the invention are shown in FIGS. 1 to 3.

Showing:

Figure 1 shows a power distribution unit with a plurality of

Load feeders in the form of plug-in modules,

2 shows a first, a so-called small insertion ausgebil ^¬ finished disclosed embodiment one of the load circuits of the invention shown in Figure 1, and 3 shows a second, so-called as a normal push-out formed ^¬ disclosed embodiment one of the load circuits shown in the figure 1 of the invention. 1 shows an example of a power distribution unit 1 in the form of a panel of a low-voltage switchgear with a total of six compartments 2, 3, 4 (insertion lines) and a plurality of recorded in the compartments load drawers 5, 6, 7, 8, 9, some of which 5, 6, 7 form motor branches. Since the low-voltage switchgear ^¬ system shown has mainly to supply motors and control, it is referred to, in practice, often as a motor control center (MCC). The insert compartments 2, 3, 4 are each closed by a frontsei ^¬ tige panel door 102, 103, 104. The load branches - here in the form of plug-in modules - extend either substantially over the entire width of the respective slot (load branches 7, 8 and 9 in the form of plug-in modules sizes 1, 2 and 3, which are also referred to as full slot) or in Substantially more than half or even only a quarter of the total width of the respective insertion compartment (plug-in modules 6 of sizes 1/2 and plug-in modules 5 of size 1/4, which are also referred to as a small insert).

The plug-in modules each have a front plate 105, 106, 107, 108 and 109, respectively.

With the reference numerals 10, 11, 12 and 13 are each a handle or a rotary handle to rotational actuation of a ren in the insertion modules arranged main switch designated ^¬ net. The reference numeral 14 is a hand slider designated, which releases an access opening for an actuating tool in an open position. The actuating tool serves to set two or more switching positions of the main switch by acting on two arranged in the withdrawable unit traversing mechanism. In particular, the switch positions comprise a test, operating or disconnected position of the main switch. The exact operation of these traversing mechanisms is described in the German patent application DE 10 2007 032 548.9, so that will not be discussed further at this point.

By the reference numeral 15 is in each case an operator control and display panel ( "REMOTE-HAND control point") is provided. In the power distributing unit 1 are exemplary, but in the ahead ^¬ representation not visible-feeding Hauptsammeischienen of a main circuit in the upper region 16 of the power distributing unit, and with To the right of the withdrawable compartments is a space provided with a separate front door 17 for receiving cables and wires (cable compartment) leading to consumers.

The adjacent in a common slot 2 adjacent load branches 5 and 6 in the form of small inserts size 1/4 or 1/2 each a common distribution assembly 18 (adapter plate) is assigned to connect the load branches 5, 6 with the field rails.

The distribution assembly 18 is firmly in a known manner on a top of the associated insertion compartment 2 form- fixed to the shelf. In this case, the insertion compartment 2 shown - matched to the number of housed next to each other small inserts - divided by several compartment partitions in sub-compartments.

At the bottom of the distribution assembly 18 are four

Maintained protective plates, which are also referred to as shutter plates or shutters captively which are guided displaceable bar for lifting a latch on the distribution assembly 18, so as AI is described in German Laid ^¬ specification DE 10 2008 020 753. In each case, one of the protective plates is used to close each one passage opening of the distribution module. The distribution module 18 is constructed as described in the German patent application DE 10 2008 049 456 AI ^{beschrie ¬} ben. Thus, it has a relatively flat cuboid ^¬ shaped basic shape and consists of a bottom part and egg ^¬ NEM lid, both made of electrically insulating plastic and can be connected by integrally formed retaining tabs. The distribution assembly 18 (adapter plate) has first flexible insulated electrical conductors which form a Einspeisever ^¬ wiring and each having at one end a main isolating contact which contacts a field bus of a main circuit, and which are inserted at its other end in a main break contact plug receptacle , Furthermore, the distribution module 18 (adapter plate) having second flexible insulated electrical conductors which form a ^{trailing-wiring} and which are inserted at one end into the main isolating contact-connector receptacle and at their other end into a contact block after the installation of the distribution assembly in the Cable connection space protrudes. Au ^¬ for putting in distribution module has third flexible iso- lierte electrical conductors which form a control wiring and which are inserted at one end into a control contact plug receptacle and at its other end in the contact block, wherein the contact block for receiving electrical conductors of a control circuit are used.

In this case, the main break contact plug receptacle and the control contact plug receptacle via openings in the bottom part of the distribution assembly are accessible.

FIG. 2 shows a first embodiment 5 of one of the load branches shown in FIG. 1, which forms a motor branch, is designed as a plug-in module and has the shape of a small plug of size 1/4. It can be inserted into one of the compartment compartments of the insertion compartment 2 formed by the compartment partitions. This consumer feeder 5 has from a disconnected position in a contact position sliding contact units in the form of a main power plug 34 and a STEU ^¬ erstromsteckers 35, as is also known from the German Offenlegungsschrift DE 10 2008 049 456 AI. Through one of the through openings of the distribution assembly through the main power plug 34 is inserted into the main break contact plug receptacle and the control power plug 35 in the control contact plug receptacle.

The main current plug 34 and the control current plug 35 are vertically movable as already described above for contacting the electrical conductors of the supply / outgoing and control wiring by means of two arranged in the respective equipment carrier Verfahrmechaniken, as in the German patent application DE 10 2007 032 548 AI is described. Thus, the main power plug 34 (also called "main circuit plug") forms both a feed contact system for contacting the main circuit and at the same time a outgoing contact system for contacting the main circuit. The control power plug 35 (also called "plug control circuit") forms a control contact system for contacting the control circuit.

FIG. 3 shows a second embodiment 7 of one of the load branches shown in FIG. 1, which is designed as a plug-in module and has the form of a normal insertion.

This second embodiment 7 of the load feeder also has a feeder contact system 134 for contacting the main circuit, a feeder contact system 234 for contacting the main circuit and a control contact system 135 for contacting the control circuit, as well as from German patent application DE 10 2007 054 295 AI is known.

The two embodiments shown in FIGS. 2 and 3 5; 7 of the load branches each have a marking means 40; 140 for indicating the disconnected position of the respective load branch 5; 7 in the power distribution unit 1, wherein in the disconnected position - as already mentioned ^¬ - the feed-contact system 34; 134 and the departure contact system 34; 135 are separated from the main circuit.

The two identification means 40; 140 have a first portion 41 formed as a mechanical barrier; 141, which is a contacting of the feed-contact system 34; 134 and the departure contact system 34; 135 prevented with the main ^¬ circuit that he as a mechanical Bar ^¬ merge between these contact systems and their associated, not shown here, with the main or Control circuit connected contact systems of the power distribution unit is located.

One each with a warning symbolism 42; 142 provided second section 43; 143 of the identification means protrudes to ^¬ Kenn ^¬ drawing the disconnected position of the load feeder front ^¬ side of the load branch 5; 7 out so that it is clearly recognizable ^¬ bar on the front of the power distribution unit. Instead of the warning symbolism 42; 142 may be located on the second section 43; 143 also be provided a warning label.

The trained as a mechanical barrier first section 41; 141 also prevents contacting of the control contact system 35 at the same time; 135 with the control circuit.

The two identification means 40; 140 are each formed as a one-piece, made of insulating plastic inserts. In this case, the first section 41; 141 each plate-like and the second section 43; 143 each formed like a flag.

The identification means 40; 140 can be at the respective

Load branch 5; 7 or on a compartment receiving the respective consumer branch (one of the slots 2 or sub-compartment of one of the slots 2) of the power distributor unit via retaining means (not shown here). However, it is also possible the identification means 40; 140 each between the load feeder and the tray to keep.

Claims

claims

1. load feeder (5; 7) for a power distribution unit

(1), in particular motor feeder for a low-voltage switchgear,

with a feed contact system (34, 134) for contacting a main circuit,

an outgoing contact system (34; 234) for contacting the main circuit and

in which the feeder contact system (34; 134) and the feeder contact system (34; 234) are separated from the main circuit by means of a marking means (40; 140) for identifying a disconnection position of the load feeder (5; 7) in the power distribution unit (1) are,

characterized in that the marking means (40; 140) a as a mechanical ^¬ specific barrier formed first portion (41; 141), comprising the contacting of the feed-in contact system (34; 134) and / or the departure contact system (34; 234 ) verhin ^¬ with the main circuit.

2. load branch (5; 7) according to claim 1,

characterized in that the second portion (43; 143) of the identification means (40; 140) provided with a warning symbol (42; 142) or warning label for identifying the disconnected position of the load feeder (5; 7) at the front from the load feeder (5; 7) protrudes out so that it is clearly visible on the front of the power distribution unit (1). Load feeder (5; 7) according to one of claims 1 or 2,

d a d u r c h e k e n e s i n e s, a s s a control contact system (35; 135) for contacting a

Control circuit is provided,

wherein the formed as a mechanical barrier first Ab ^{¬ section} (41, 141) prevents contact of the control contact system with the control circuit.

Load feeder (5; 7) according to one of claims 1 to 3,

That is, the identification means (40; 140) is formed as an integral insert made of insulating plastic.

Load feeder (5; 7) according to one of claims 2 to 4,

That is, the first section (41, 141) is plate-like and the second section is d a d u r c h e k e n e

Section (43, 143) is formed like a flag.

6. power distribution unit (1), in particular low-voltage switchgear, with at least one load feeder (5, 7), in particular as a plug-in module or as a

Steckeinsatzkmodul is formed,

The at least one load feeder (5; 7) according to one of claims 1 to 5 is configured as a d a d e r c h e k e n e.

7. power distribution unit (1) according to claim 6,

characterized in that the identification means (40; 140) is mounted on the load branch (5; 7) or on a compartment (2) of the power distribution unit (1) receiving the load branch.