DE3501314A1 - MULTIPOLE CIRCUIT BREAKER - Google Patents

Abstract

1. Multipole circuit breaker consisting of assembled automatic devices or poles, at least for an outer conductor, in which case the automatic device is provided with its own tripping device, and for a central conductor, in which case the automatic device without its own tripping device is released by means of the automatic device or automatic devices for outer conductors, this resulting in the opening of a contact, characterised in that only in the automatic device or in the automatic devices for outer conductors, as the case may be, in the current supply (5) to the contact are arrangements formed for the stimulation of the arc path.

Description

Siemens Aktiengesellschaft Our symbol Berlin and Munich VPA 85 P 3 0 1 2 OB

Multipole circuit breaker

The invention relates to multi-pole circuit breakers from assembled machines or poles, at least for an outer conductor, whereby the machine has its own trigger, and for a center conductor, whereby the machine without its own trigger is released by the machine or machines for external conductors becomes what leads to the opening of his contact.

Machines with their own trigger are also called protected machines or poles, and machines without their own Trigger unprotected machines or unprotected poles. In the case of miniature circuit breakers, it is common practice to Provide arc running aids. So blow loops can be formed in the power supply to the contact or also arc entry aids in the quenching plates through one arranged in front of the face of the quenching plates Power supply line (DE-PS 26 09 708). Arc running aids can also be used as a special guide for the gas flow, as so-called flow around it (DE: P 33 11 052).

The invention is based on the knowledge that in the machine or pole for the center conductor, below Called Mp conductors, the contact pieces are therefore exposed to increased burn-off because of the forces of the arcing aids Open the contact of the Mp-PoI before the unlatching via the machine or the pole for the outer conductor he follows.

No 2 Council / 07.01.1985

35013H -Ϊ- VPA 85 P 30 12DS

The invention is based on the object of increasing the erosion of the contact pieces in the case of multi-pole circuit breakers of the Mp machine.

The solution to the problem described is according to the invention that only in or in the machine for Outer conductors are formed in the current lead to the contact precautions to promote the arc run. Through this the occurrence of the arc in the machine for the MP conductor is delayed compared to the other poles, so that the unlatching of a machine for external conductors, i.e. of a protected pole, is timely takes place before the current in the machine for the MP conductor to open the not yet unlocked contact could lead. The erosion of this contact is significantly reduced, so that performance restrictions in the use of the multi-pole circuit breaker or complex additional measures such as essential increased contact forces or particularly durable contact pieces are not necessary.

In the case of a multi-pole circuit breaker of the type described, in which the individual machines or poles have an arc track with a fixed contact piece, which is opposite a movable contact piece, and with one along the end faces of quenching plates below the plane in which the movable contact piece is guided, running supply line, a development of the solution according to the invention has the following features on:

In the case of the machine (s) for external conductors, the supply line is behind the arc when viewed in the direction of the arc Fixed contact piece connected to the arc track. The feed line is at the machine for the MP conductor

35013H

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Seen in the direction of the arc on or in front of the fixed contact piece connected to the arc track.

The invention will now be described in more detail with reference to exemplary embodiments shown roughly schematically in the drawing explained:

In Fig. 1, a machine for external conductors, that is, a protected pole is illustrated partially cut in a side view be.

In Fig. 2 is an embodiment for an automatic "·" " ten for the Mp conductor, i.e. an unprotected pole, shown in side view with partial section. In FIG. 3, in the representation according to FIG. 2, there is another exemplary embodiment for an unprotected pole illustrated.

A further exemplary embodiment for an unprotected pole is illustrated in FIG. 4.

20 The multi-pole circuit breaker from assembled machines or poles has at least one for one Outer conductors, for example according to FIG. 1. He is with a machine according to one of Figures 2 to 4, so one ^ those for the MP conductor, assembled. The machine for the Mp conductor can be oriented in front of or with reference to FIG be arranged behind the plane of the drawing. The machine for an outer conductor has its own trigger, a thermal and / or magnetic release below or to the side of the key switch 1. The machine for the Mp conductor according to FIG. 2 does not have its own trigger; he is through a machine for the outer conductor ' also unlatched when this is unlatched by a trigger. When the key switch 1 of the machine unlatched for an outer conductor becomes its

Contact with the fixed contact piece 2 and the movable contact piece 3 is opened and via a coupling 4 the Switching mechanism 1 of the machine according to FIG. 2 with unlatched, so that its contact with the fixed contact piece 2 and the movable contact piece 3 is opened, as illustrated by the dashed line.

It is essential that in the machine for the outer conductor according to FIG. 1 in the power supply 5 to the contact precautions are designed to promote the arc run. In the exemplary embodiment this is a blow loop, which is formed in that the lead seen in the direction of arc 6 behind the fixed contact piece 2 is connected to the arc rail 7. In contrast, the machine for the Mp head according to FIG. 2 is the Feed line 8, viewed in the arc running direction 6, is connected to the fixed contact piece 2 with the arc running rail 7. In the exemplary embodiment, an arc inlet aid for the outer conductor is in front of the quenching plates in the machine in the form of one along the end faces of the quenching plates below the plane in which the movable contact piece 3 is guided running supply line 9 is formed. When the machine for the Mp head according to Figures 2 to 3 is the For reasons of series production, feed line 9 is designed according to FIG. 1.

In the machine for the MP conductor with the unprotected pole there is space for the magnetic release 10 and for the thermal release 11 not equipped.

In the embodiment of the machine for the MP conductor according to FIG. 3, the lead 8 is in the direction of the arc 6 connected to the arc running rail 7 in front of the fixed contact piece 2. This is also a blown loop in the lead to the contact does not materialize.

τ * - VPA85 P 30 12OE

In the machine for the MP conductor according to FIG. 4, the supply line 8 is in the immediate vicinity of the connection terminal 12 connected to the arc rail 7, so that here, too, no starting aid for the between the fixed contact piece 2 and the movable contact piece 3 to be drawn arc when the contact is opened. There at unprotected automats the arc is, neither a start-up aid is desired, which the contacts too early A run-in aid might still be required. The quenching plates can therefore also be omitted. The representation according to Figures 2 to 4 is then to be understood that in the quenching chamber only the formations for insertion are reproduced by quenching plates.

2 claims
4 figures

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Claims (2)

Claims 1. 'Multipole circuit breaker from assembled Automatic machines or poles, at least for one external conductor, whereby the machine has its own trigger, and for a center manager, the automaton without its own trigger by the automaton or automatons for external conductors is also unlatched, which leads to the opening of a contact, characterized in that that only in or in the machine for external conductors in the power supply (5) to the contact precautions are designed to promote the arc run. 2. Multipole circuit breaker according to claim 1, in which the individual machines or poles have an arc rail (7) with a fixed contact piece (2) opposite which a movable contact piece (3) is located, and with one along the end faces of quenching plates below the plane in which the movable one Contact piece (3) is guided, running supply line (8), characterized in that at the machine (s) for external conductors, the feed 4- device (8) seen in the arc running direction (6) behind the fixed contact piece (2) is connected to the arc rail (7) and that with the machine for the center conductor the supply line (8) seen in the arc running direction (6) on or in front of the fixed contact piece (2) is connected to the arc rail (7).