DE2361253A1 - Neutral conductor isolator switch - has housing fastenable to protective cct. breaker with two stationary contacts and connecting bridge - Google Patents

Abstract

The isolator switch for the neutral conductor co-operates at least with one protective circuit breaker, partic. in distribution installations. The isolator switch has a separate housing which can be connected by an independent fastening device to the protective circuit breaker. The housing contains a contact assembly of two fixed contacts, facing each other, which are connectable via a contact bridge, the assembly being switchable by displacement of the contact bridge via an actuator element. The contact bridge is pref. made of spring material in the shape of a U-profile, whose shanks extend to both sides of the stationary contacts. Thus the shank inner sides slide under spring force over the stationary contacts.

Description

I J. ¹ - ;; OV /! - !, HOVEfJI & ClE - AKfIENGESELLSCKAFT · ^: '-

I Part no . 684/75 Mannheim, December 5, 1973

I. PAT-You / Vo

! Neutral disconnector

The invention relates to a neutral conductor disconnector, in particular for installation distributions.

! Neutral conductor disconnectors are used in electrical systems where, for reasons of better troubleshooting; (Insulation measurements, etc.) must be disconnected from the mains at all poles j.

ι It is known, installation circuit breaker with a built-on; th neutral conductor disconnector (DGM 1 838 282, BBC list "Technical Series Products" 1969, page 1.1 / 13), but must This assembly is still done with special tools that require the assembly of the complete device in the manufacturing plant: to the. Installation circuit breakers are also known to be switched on; built-in neutral disconnector. Both training are disadvantageous; mentions that they refer to the production program of plumbing

tine circuit breakers, which come in numerous variants according to tripping characteristics, ■ rated current, number of poles and external dimensions; are not economically compatible or can only be reconciled with a disproportionate amount of effort. In this variation] namely efficient production and distribution are such special switch · as custom-made part due to the long delivery ^periods: not possible. In addition, extensive storage is required for this large number of different neutral conductor disconnectors: . Ϊ

The known, built-on neutral conductor disconnectors have a disadvantage also the execution of the contact. So the con-

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tact pressure only through the suspension of the movable contact arm ' generated. Since this is designed for a relatively high continuous current j, which requires a large cross-section, is despite a long Spring travel achieved only a small spring effect, so that high quality Spring material must be used.

The invention is based on the object, the structure of installation \ tion distributions to allow with neutral disconnectors, j

without the need for a special installation circuit breaker "with separable: Neutral conductor "are required. Another task is to design a functionally reliable contact that can be used with minimal material rial expenditure produced under favorable manufacturing conditions can be.

According to the invention, this object is achieved in that the neutral j conductor disconnector is arranged in a separate housing that is attached to the InstaUa-; tion circuit breaker can be aligned, and that a j contact is disposed in the housing, the fixed two, is composed opposed contact pieces via a _contact: bridge are connected to each other, wherein the contact means of an actuator by moving the contact bridge is switchable.

The advantages achieved by the invention are in particular that no forces are exerted on the housing by the contact, because the formation of the contact bridge as a U-profile, the legs press on both sides against the contact pieces to be connected, so that the spring forces outwards lift. This prevents a change in the position of the fixed contact pieces due to contact forces and the resulting decrease in the contact force. To the housing overall j ringere requirements can in terms of stability provided v / ^ER: the. The sliding movement of the contact bridge on the!

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Contact pieces when actuating the contact is given self-cleaning. The installation of the contact in a separate housing allows universal use of the neutral conductor disconnector. ' \

An embodiment of the innovation is shown in the drawing and is described in more detail below. It shows ^: Fig. 1 a side view of the neutral conductor disconnector with the cover wall removed,

FIG. 2 shows the top view of the neutral conductor disconnector, FIG. 3 shows a side view of the contact bridge, FIG. 4 shows the top view of the contact bridge, FIG. 5 shows a section in the plane V-V of the contact bridge in FIG Fig. 3.

The neutral conductor disconnector according to the invention has a housing 1 made of plastic, into which a contact 2 is inserted. This contact 2 consists of two fixed, opposite contact pieces 3, 4 made of flat material, which can be connected to one another via a contact bridge 5. The contact bridge 5 is made of spring material and has the shape of a U-profile. the legs 7, 8 of which are mechanically biased and the contact pieces 3, 4 include on both sides, so that the inner sides of the legs. slide under spring force on the contact pieces 3, 4. To the under ^; To support the sliding movement, the legs 7, 8 are bent outward at their end faces 16, 17.

The switching process is carried out via an actuator 6, j which is mounted tiltably in a pivot point of the housing 9. It! engages with its pin 10 in a recess 11 of the contact. bridge 5 and actuates this by pushing the contact bridge onto or down the contact piece 4, the contact bridge during the switching process on the other contact

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I piece 3 slides continuously. In both switch positions of the contact ! tes is the actuator 6 via a molded Nooke 12! lockable.

Furthermore, the profile of the housing 1 is matched to that of the installation switch and can be attached to a top-hat rail with these. In this case, one in a Ni · ^; see 13 of the housing 1 rotatably mounted, screw 14 fixed in the longitudinal direction, a tab 15 tightened against the end piece of the hat profile. However, a bracket mounted in a pivot point can also be pressed against the end piece of the hat profile by a screw. If the contact is open, the actuating member 6 protrudes partially from the profile of the housing 1 and the cover cannot be inserted into the vaulting. A mechanical interlock prevents the unintentional deactivation of a protective measure, e.g. zeroing.

The top piece 18 is used when lining up installation circuit breakers with different heights clipped onto the corresponding circuit breaker to compensate. :

5-0 98-2 5/00 65

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Claims (1)

236-253 E 1733 and E 1697 Claims '' 1 ./neutral disconnector, which is equipped with at least one installation circuit breaker cooperates, especially in installation j Distributions, characterized in that the neutral conductor disconnector is arranged in a separate housing which can be lined up on the installation circuit breaker by means of its own fastening device, and that a contact (2) is arranged in the housing (1), which consists of two fixed, there is opposite contact pieces (3, 4) which are connected to each other via a contact bridge (5) i can be connected, the contact by means of an actuation: organs (6) can be switched by moving the contact bridge. ! 2 "neutral conductor disconnector according to claim 1, characterized I draws that the contact bridge (5) made of spring material in ; the shape of a U-profile is made, the legs j (7,8) encompass the contact pieces (3,4) on both sides, so that j the insides of the legs under spring force on the contact ! pieces slide that the legs on their front sides after I are bent on the outside, and that the contact bridge has a recess I (11), in which the actuating member (6) engages. 50 9825/0065 (■ 1 {! /; ■ 11 ^r . (X) / Ki :) 3. Neutral conductor disconnector according to claim 1 or 2, characterized in that that the actuating member (6) is rotatably mounted in a pivot point (9) of the housing and in "two switch positions of the contact via a molded mock (12) is lockable. 4. neutral disconnector according to one of claims 1 to 3, characterized in that the housing on top hat rails can be installed, with one in a niche (13) : of the housing rotatably mounted, fixed in the longitudinal direction Screw (14) a tab (15) can be tightened against the end piece of the hat • profile.