DE1169015B - Electrical circuit breakers with overcurrent, short-circuit and residual current releases - Google Patents

Description

FEDERAL REPUBLIC OF GERMANY

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GERMAN PATENT OFFICE Boarding school Class: H02d

EDITORIAL

Number: File number: Registration day: Display day:

German class: 21c-68/01

S 81731 VIIIb / 21 c
September 28, 1962
April 30, 1964

Electrical circuit breakers are known which have an overcurrent release, a short-circuit release and a fault current release to have. These circuit breakers are a special design in which all parts are in are housed in a common housing.

The invention takes a different approach in the construction of an electrical circuit breaker with overcurrent, Short-circuit and residual current releases. According to the invention is on a line circuit breaker trained component, the single or multi-pole switching contact parts with terminals in a known manner, an overcurrent release, a short-circuit release and a switch lock with a manual control element contains a component attached transversely to the connecting line of the terminals, which has a residual current release with test button, possibly also single-pole or multi-pole switch contact parts with connection terminals having. A transmission element for the action of the fault current release on the switch lock and possibly also between the two components a transmission element for moving the switching contact parts of the one provided with the residual current release Component provided with the switching contact parts of the other component. The invention lets an independently acting miniature circuit breaker complement each other so that the added circuit breaker at the same time responds to fault current. One can therefore largely for the construction of the circuit breaker according to the invention Use circuit breakers that have already been developed. This enables the production of residual current circuit breakers particularly facilitated with different numbers of poles. Another advantageous structure of the circuit breaker according to the invention is that both components are shell-shaped housing have the same external dimensions with the exception of the width measured in the axial direction, wherein the one housing forms the cover for the other housing and is itself closed by a plate is.

An exemplary embodiment of the invention is shown in the drawing.

F i g. 1 shows a section through the circuit breaker according to the invention;

F i g. 2 and 3 show plan views of both components from which the circuit breaker according to the invention consists.

The electrical circuit breaker consists of two components 1 and 2. The component 1 is as designed for independently acting miniature circuit breakers. Component 2 contains those parts which are necessary to complement the line circuit breaker to a residual current circuit breaker.

Electrical circuit breakers with overcurrent,
Short-circuit and residual current releases

Applicant:

Siemens-Schuckertwerke Aktiengesellschaft,

Berlin and Erlangen,

Erlangen, Werner-von-Siemens-Str. 50

Named as inventor:
Dipl.-Phys. Dr. Gunter Krakow,
Oberisling near Regensburg,
Helmut Rösch, Regensburg

Both components are attached to one another. They preferably have shell-shaped housings 3, 4 which have the same external dimensions with the exception of the width measured in the attachment direction. The housing 4 of the component 2 forms the cover for the housing 3. The housing 4 itself is closed by a plate 5.

The component 1 contains in its housing 3 switching contact parts 6, 7 with a quenching device 8 acting on the arc in the form of blower plates. 9 is the switch lock on which a manual control element 10 acts. A bimetallic strip is used as the overcurrent release 11 , and a magnetic coil with armature is used as the short-circuit release 12. Overcurrent release 11 and short-circuit release 12 act via intermediate members 13, 14 on the switching mechanism. The component 1 has terminals 14 on two opposite sides. Depending on whether one or more lines are routed over the component 1, switching contact parts, terminals, overcurrent and short-circuit releases are single-pole or multi-pole.

The component 2 contains a residual current release. The residual current release includes a summation current transformer 15 and a switching magnet 16. If necessary, an amplifier is also connected between the summation current transformer and switching magnet. In the exemplary embodiment in the drawing, the residual current release consists only of a summation current transformer and a switching magnet. In the component 2 there is a test button 17 in order to produce an artificial fault current in the system. The component 2 can also contain switching contact parts 18, 19 with an extinguishing device 20 in the form of blown plates. If switch contact parts are

409 587/440

are seen, it also has terminals 21. Under certain circumstances, if necessary, in component 2 an additional overcurrent and short-circuit release can be accommodated.

Both components 1 and 2 are transverse to the connecting line of the terminals 14 and 21 of each component put together. The connecting means of the components (not shown) traverse them in the Bores 25, 26. Between the two components is a transmission link for the action of the residual current release on the key switch required. This is expediently formed by a rotating shaft 22. At the A lever 23 is seated on the rotating shaft and acts on the switching magnet 16. When the solenoid responds the rotary shaft 22 rotates and triggers as when the overcurrent or short-circuit release responds the key switch 9 off. If the component 2 provided with the residual current release still contains switch contact parts 18, 19, a transmission link is still required between the two components in order to achieve the Switching contact parts of the component provided with the residual current release with the switching contact parts of the to move other component. A common shaft 24 can serve as the transmission element. Preferably the transmission members 22 and 24 are mounted on the housing bottom.

In addition, there are electrical connections 27 between the two components in order to connect those conductors which are connected and switched in component 1 by the summation current transformer 15 of component 2 to be able to perform.

The component 1 contains at least one conductor as the conductor to be switched. At most, he has four conductor to be switched. The component 2 does not need to have a conductor to be switched. At most he can have three conductors to be switched. If component 1 only has one conductor to be switched, component 2 have at least one conductor to be switched. The central conductor to be switched is when the Component 1 has only one conductor to be switched to be accommodated in component 2. Otherwise he can be in that one or another component are located. If component 2 has no switch contact parts and no terminals, so it takes up particularly little space. In this case, it is designed as a line switch Component 1 only slightly enlarged by the supplementary component 2.

Claims (3)

Patent claims: 1. Electrical circuit breaker with overcurrent, short-circuit and fault current release, thereby characterized in that on a component (1) designed as a circuit breaker, the in a known manner single-pole or multi-pole switching contact parts (6, 7) with connecting terminals (14), an overcurrent release (11), a short-circuit release (12) and a switch lock (9) with a manual actuator (10) contains, transversely to the connecting line of the terminals (14), a component (2) is attached which has a fault current release (15, 16) with test button (17), if necessary has one or more pole switch contact parts (18, 19) with terminals (21), wherein between the two components (1, 2) a transmission element (22) for the action of the residual current release (15, 16) on the switch lock (9) and optionally a transmission member (24) for moving the switch contact parts of the with the component (2) provided with the residual current release with the switching contact parts of the other component (1) are provided. 2. Circuit breaker according to claim 1, characterized in that both components (1, 2) are cup-shaped Housing (3, 4) have the same external dimensions with the exception of those in the axial direction measured width, with one housing (4) forming the cover for the other housing (3) and is itself closed by a plate (5). 3. Circuit breaker according to claim 1 and 2, characterized in that the transmission elements (22, 24) are formed between the two components (1, 2) by rotating shafts which are mounted on the housing base. 1 sheet of drawings 409 587/440 4.64 @ Bundesdruckerei Berlin