DE1036356B - Switchgear with pull-out devices or device blocks - Google Patents

Description

GERMAN

In switchgear with withdrawable or pull-out devices or device blocks, these are connected to the Busbars of the outgoing or incoming lines often with the help of plug-in contact pieces tied together. In order to achieve the necessary contact pressure, these plug-in contact pieces must be designed to be resilient be. So that the resilient contact pieces do not depend on the fixed counter-contact pieces, which between the mutually resilient parts of the contact piece grip, lifted off as a result of a short circuit must, the pressure of the resilient contact pieces on the fixed, lying between them mating contact pieces be dimensioned according to the size of the lifting force. Hence the pulling force is to extend or pulling out the device or device block considerably and amounts to approximately for larger switches 60 kg, so that the devices or device blocks can only be operated with the help of specially designed devices can be pulled out of the switchgear racks. Conversely, it is necessary to use the Moving devices or device blocks into the switchgear racks with considerable momentum, so that the contacts push the resilient mating contact pieces apart and the switch is in its correct position Retracted position can be brought. The one at the end of the retraction movement when the contact pieces are touched Any remaining potential energy is here considerably large and is not caused by the friction the contacts are consumed. Therefore the remaining potential energy is destroyed by attacks.

For connecting pull-out devices or device blocks with the busbars of the incoming ones and outgoing lines, it is also known to use flat pressure contacts. In order to achieve the necessary Ensuring contact pressure for a safe current transfer becomes part of the contacts designed to be resilient, the contact springs being compressed when the device is retracted. The last part of the switching path has to be done with the application of considerable forces, on the other hand the device must be locked to prevent the device from being accidentally driven out to prevent the action of the contact springs.

In contrast, the invention relates to switchgear with pull-out devices or device blocks and plug-in contact (friction contact) separators between fixed and moving parts and has the task of largely reducing the force required to extend the devices. The invention consists in the fact that springs which are not involved in the generation of the contact pressure and which store the excess kinetic energy when the devices or the device block are retracted and in the switchgear with pull-out devices
or device blocks

Applicant:

Siemens-Schuckertwerke
ίο public limited company,

Berlin and Erlangen,
Erlangen, Werner-von-Siemens-Str. 50

House Stockinger, Berlin-Siemensstadt,
has been named as the inventor

Extending the same by releasing the tension reduce the pull-out force.

Embodiments of energy storage according to the invention are shown schematically in the drawings. FIGS. 1 and 2 show an energy store which is arranged in the contact sets. With α and α the mutually resilient contact pieces fastened to the switchgear frame f are designated , with b the contact piece located on the device movable in direction d and with c the spring energy store. 1 shows the relaxed energy storage device, which corresponds to the extended state of the mobile device, and FIG. 2 shows the tensioned energy storage device, which corresponds to the retracted state of the mobile device. Slidable pressure plates are denoted by g.

Fig. 3 shows an embodiment with two spring stores h and i, which are detached from the contact sets and arranged between the movable switch e and the fixed frame / switchgear. The illustration shows the relaxed state of the spring accumulators h and i.

The mode of operation can be seen from the drawing without further ado. In this example, the contact pieces are denoted by k and /.

Claims (3)

Patent claims: 1.Switchgear with pull-out devices or device blocks and plug-in contact (friction contact) Separation pieces between fixed and moving parts, characterized by at the production the contact pressure uninvolved fedeni (c), & 09 597/429 which store the excess kinetic energy when the devices or the device block are retracted and reduce the pull-out force by releasing them when they are extended. 2. Switchgear according to claim 1, characterized in that the springs (c) are arranged in the interior of the fixed plug contacts (a, a ') (Fig. 1 and 2). 3. Switchgear according to claim 1, characterized in that the springs {h, i) are arranged next to the plug-in contact separators between the extendable part ((?) And the fixed part (/) (Fig. 3). Considered publications:
German patent specifications No. 488 111, 748 108. 1 sheet of drawings