DE102016124663B4 - Arrangement comprising a plug-in module for a switchgear with an electrical contact element and a drive - Google Patents

Abstract

Arrangement comprising a plug-in module (5) for a switchgear with an electrical contact element (6) and a drive (7) for moving the plug-in module (5) and the electrical contact element (6) relative to a switch panel, the drive (7) at least comprises a hydraulic arrangement, by means of which the plug-in module (5) and the contact element (6) can be moved, characterized in that the hydraulic arrangement has at least one master cylinder (9) and at least one slave cylinder (10), which work together in such a way that when the master cylinder is actuated (9) the slave cylinder (10) performs a movement and/or exerts a force which moves the plug-in module (5) and the electrical contact element (6), the master cylinder (9) and the slave cylinder (10) each being connected to the plug-in module ( 5) are connected and built into it and the slave cylinder (10) is connected to and/or is supported on a connecting part (8) which is fixed to the control panel.

Description

The invention relates to an arrangement according to the preamble of claim 1.

From the JP 2012-222 897 A a circuit breaker is known which can be pulled out of a storage compartment of a power distributor. The KR 101 210 348 B1 shows a lifting device with a hydraulic cylinder. The GB 400 707 A shows a metal-clad switchgear. The US 2011/0198141 A1 shows a vehicle with an engine connected to a hydraulic pump. The DE 10 2004 062 695 A1 also shows a hydraulic pump, especially for lifting equipment. The JP 2005-251 545 A shows a hydraulic drive device for a circuit breaker.

In order to ensure rapid interchangeability, the greatest possible variability, the greatest possible ease of maintenance and also the greatest possible safety, electrical functional units, in particular motor starters, are often arranged in individual modules. These modules are moveable and/or interchangeable components.

The modules can have a wide variety of dimensions and weights. In order to connect the modules to a consumer with a voltage source arranged in a switch panel and the outgoing cables usually also located there, detachable contact arrangements are used. In this respect, the base unit can be designed as a switch panel.

A contact arrangement consists of a fixed contact element, which is arranged in the switching panel, and a movable contact element, which is arranged in or on the module.

After the module has been inserted into the control cabinet, it is in an isolated or disconnected position. This means that neither the main circuit nor the auxiliary circuits of the module have any electrical connection to the cubicle.

As a rule, the module is now brought into a test position manually or by motor. In this test position, the main circuit is still safely isolated from the module.

However, in order to be able to carry out tests, an auxiliary circuit is connected or connected. The module can now be moved further and brought into its operating position by a manual or motor drive.

In the operating position, all contacts are closed and the module is ready for operation. In order to achieve the different contact states, either the entire module or only the contact elements have to be moved.

A movement distance of 30 mm to 50 mm is usually sufficient. The movement can take place in particular by sliding the entire module in like a drawer.

Mechanical aids can also be used to facilitate operation with heavy modules and/or high contact forces. These aids can include lead screws, cam discs or lever constructions.

Against this background, it is known to move a module using a threaded spindle. A drive used for this usually has a rotatable threaded spindle arranged in the module and a nut fastened in the control cabinet. By turning the threaded spindle, the module or only the contact elements in the module are moved into the individual positions. This is a classic way of moving parts.

In one embodiment, self-locking can be provided. This means that the module cannot be moved without turning the lead screw. Despite the short movement distance of 50 mm at most, several turns are usually necessary, since the thread pitch cannot be chosen too large due to the not inconsiderable contact forces.

When using high and/or wide modules, complex guides are necessary in order to prevent tilting or skewing when there is only one spindle application point.

If several threaded spindles are installed in order to achieve straight movement of the module, they must rotate synchronously. They must be coupled together by chains, toothed belts or similar means. This is very complex and takes up a relatively large amount of space.

It is also known to move a module by means of a cam. A drive used for this uses a pivoting movement of an operating lever to move the module. A cam disk connected to the operating lever engages in a fixed point and moves the module back and forth due to its curve shape.

In order to achieve the movement distance of 50 mm or less, a relatively large cam is necessary. Due to contact forces, a slope of a curve must not be allowed here either be tall In order to ensure that the module retracts evenly, two cam discs can be connected to the operating lever either on the left and right or on the top and bottom and swiveled at the same time.

This requires a large, bulky operating lever on the front of the module. Large slots are provided in the front of the module for the operating lever and/or the cam disc. In order to achieve the high degrees of protection that are usually required at this point, the most complex sealing measures are necessary.

It is also known to move a module using a lever construction. A drive used for this also uses a pivoting movement of an operating lever to move the module. The cam disc is replaced here by a lever construction. One or two-sided levers grip around a fixed point and cause the module to be pushed in. With such a drive complex sealing measures are necessary.

The invention is therefore based on the object of making an electrical contact using a drive that is as compact and reliable as possible.

According to the invention, the above object is achieved by an arrangement having the features of claim 1.

According to the invention, it has been recognized that a module or at least one electrical contact element can be moved by means of a hydraulic arrangement of a hydraulic drive. In concrete terms, it has been recognized that mechanical parts of a drive can be replaced by a hydraulic arrangement.

Cylinders, in particular master and slave cylinders, of the hydraulic system can be connected to flexible hoses. It is therefore possible to arrange a cylinder, in particular a slave cylinder, at any local working position.

An optimal working position can be selected on the basis of the prevailing balance of power. It has also been recognized that any number of cylinders can be used for large and/or heavy modules.

No mechanical coupling of the cylinders is necessary, since the cylinders can work synchronously to move the module or the contact element. By choosing suitable piston diameters, an optimal power or displacement transmission can be achieved.

The drive or the hydraulic arrangement is advantageously installed in the module or on the module and interacts with a connecting part fixed to the base unit. As a result, the module is designed as a structural unit that can be flanged to a fixed connection part of a base unit, namely a switch panel.

The hydraulic arrangement also has at least one master cylinder and at least one slave cylinder, which work together in such a way that when the master cylinder is actuated, the slave cylinder executes a movement and/or exerts a force that moves the module and the electrical contact element. A user can easily operate one or a variety of others by operating one cylinder.

A master cylinder can advantageously actuate several slave cylinders. A motorized master cylinder can also be installed at a suitable point. A specific module that is to be moved can be selected via valves. This embodiment is advantageous if one or more hydraulic arrangements are assigned to the base unit, namely a control panel, or are built into it.

The master cylinder and the slave cylinder are each connected to the module and built into it, with the slave cylinder being connected to and/or supported on a connecting part which is fixed to the base unit. The slave cylinder can thus exert tensile or compressive forces on the binding part, the reaction of which moves the module and the electrical contact element.

Against this background, the connection part is advantageously designed as a bolt. A bolt is stable, can absorb large forces and is easy to manufacture.

The master cylinder is also advantageously connected to a front wall of the module. So the master cylinder is easily accessible for a user.

The master cylinder can advantageously be operated by a rotating, pressing or tilting movement in order to actuate the slave cylinder. These movements are space-saving and easy to execute.

According to a preferred embodiment, the master cylinder and/or the slave cylinder can be reset by a spring. This simplifies the operation of the hydraulic arrangement, since mechanical means are used for resetting.

The master cylinder and/or the slave cylinder is/are also advantageously equipped with a double-acting, with two single-acting or with a single-acting spring-resettable piston. Every combination is conceivable in order to be able to transmit large forces in a small space without any problems. Large movement distances can be realized, with mechanical resetting of the pistons of the cylinders.

The aforementioned module is a plug-in module for a switchgear, in particular a low-voltage switchgear module.

At least one switching device is advantageously arranged in the module, which can be actuated by a master cylinder of a hydraulic system, with a switching valve being provided. The hydraulic arrangement can be converted by the switching valve. After the switching valve has been actuated, the hydraulic arrangement no longer moves the module or the electrical contact element, but actuates a switching device. It is also conceivable, however, for the module or the electrical contact element to be moved and the switching device to be actuated at the same time by the master cylinder.

The arrangement described here has a switch panel as the base unit.

• 1 einen Antrieb des Stands der Technik, welcher eine Gewindespindel nutzt, die mit einer Mutter in Eingriff steht,
• 2 einen Antrieb des Stands der Technik, welcher eine Kurvenscheibe nutzt,
• 3 eine erste Ansicht eines Moduls in ausgefahrenem Zustand, in welchem ein doppelt wirkender Geberzylinder mit einem Drehschalter und ein doppelt wirkender Nehmerzylinder angeordnet sind, wobei ein feststehender Bolzen einem nicht dargestellten Gehäuse einer Basiseinheit zugeordnet ist,
• 4 eine erste Ansicht des Moduls gemäß 3 in eingefahrenem Zustand,
• 5 eine zweite Ansicht des Moduls gemäß 3 in ausgefahrenem Zustand, und
• 6 eine zweite Ansicht des Moduls gemäß 4 in eingefahrenem Zustand.

Show in the drawing

• 1 a prior art drive utilizing a lead screw engaged with a nut,
• 2 a prior art drive using a cam,
• 3 a first view of a module in the extended state, in which a double-acting master cylinder with a rotary switch and a double-acting slave cylinder are arranged, with a fixed bolt being associated with a housing (not shown) of a base unit,
• 4 a first view of the module according to 3 in retracted condition,
• 5 a second view of the module according to 3 in the extended state, and
• 6 a second view of the module according to 4 in retracted condition.

1 Figure 1 shows a prior art drive utilizing a lead screw 1 engaged with a nut 2 . 2 also shows a drive of the prior art, which uses a cam 3, which is connected to an operating lever 4.

3 shows an arrangement comprising a module 5 with an electrical contact element 6 and a drive 7 for moving the module 5 and the electrical contact element 6 relative to a base unit, not shown.

The drive 7 comprises at least one hydraulic arrangement, through which the module 5 and the contact element 6 can be moved.

The module 5 can be moved like a drawer as a whole, where 3 and 5 show the module 5 in the extended state. 4 and 6 show the module 5 in the retracted state, so that the electrical contact element 6 is electrically conductively connected to a fixed contact element assigned to it.

The drive 7 is installed in the module and interacts with a connecting part 8 fixed to the base unit. The connecting part 8 is designed as a bolt.

The hydraulic arrangement has a master cylinder 9 and a slave cylinder 10 which work together in such a way that when the master cylinder 9 is actuated, the slave cylinder 10 executes a movement and exerts a force which moves the module 5 and the electrical contact element 6 .

The master cylinder 9 and the slave cylinder 10 are each connected to the module 5 and built into it, with the slave cylinder 10 being connected to the connection part 8 and supported on it. The connection part 8 is fixed to the base unit, so that the module 5 can be moved relative to the base unit.

The master cylinder 9 is connected to a front wall 11 of the module. The master cylinder 9 can be operated by a rotary movement in order to actuate the slave cylinder 10 .

A rotary switch 12 is provided for this purpose, which the user can grip without coming into contact with the master cylinder 9 . The rotary switch 12 is arranged on a surface of the front wall 11 which faces away from the surface of the front wall 11 on which the master cylinder 9 is attached.

The master cylinder 9 and the slave cylinder 10 can be reset by a spring. The master cylinder 9 and the slave cylinder 10 are each equipped with a double-acting, spring-resettable piston.

There are two hydraulic lines 13, 14 which connect the master cylinder 9 to the Neh connect mer cylinder 10 in a fluid-conducting manner. The hydraulic lines 13, 14 are preferably designed as flexible hoses.

The module 5 is further in the 5 and 6 shown. The module 5 is designed as a structural unit which can be moved as a whole in the manner of a drawer.

The module 5 has a box-like design and can accommodate additional components, in particular switching devices.

Reference List

1

lead screw

2

Mother

3

cam disk

4

operating lever

5

module

6

electrical contact element

7

drive

8th

connection part

9

master cylinder

10

slave cylinder

11

front wall

12

rotary switch

13

hydraulic line

14

hydraulic line

Claims (7)

Arrangement comprising a plug-in module (5) for a switchgear with an electrical contact element (6) and a drive (7) for moving the plug-in module (5) and the electrical contact element (6) relative to a switch panel, the drive (7) at least comprises a hydraulic arrangement, by means of which the plug-in module (5) and the contact element (6) can be moved, characterized in that the hydraulic arrangement has at least one master cylinder (9) and at least one slave cylinder (10), which work together in such a way that when the master cylinder is actuated (9) the slave cylinder (10) performs a movement and/or exerts a force which moves the plug-in module (5) and the electrical contact element (6), the master cylinder (9) and the slave cylinder (10) each being connected to the plug-in module ( 5) are connected and built into it and the slave cylinder (10) is connected to and/or is supported on a connecting part (8) which is fixed to the control panel. arrangement according to claim 1 , characterized in that the drive (7) or the hydraulic arrangement is installed in the plug-in module (5) or on the plug-in module (5) and interacts with a connecting part (8) fixed to the control panel. arrangement according to claim 1 or 2 , characterized in that the connecting part (8) is designed as a bolt. Arrangement according to one of the preceding claims, characterized in that the master cylinder (9) is connected to a front wall (11) of the plug-in module (5). Arrangement according to one of the preceding claims, characterized in that the master cylinder (9) can be operated by a rotating, pressing or tilting movement in order to actuate the slave cylinder (10). Arrangement according to one of the preceding claims, characterized in that the master cylinder (9) and/or the slave cylinder (10) can be reset by a spring and/or that the master cylinder (9) and/or the slave cylinder (10) is/are equipped with a double-acting, with two single-acting or with a single-acting spring-returnable piston. Arrangement according to one of the preceding claims, characterized in that at least one switching device is arranged in the plug-in module (5), which can be actuated by a master cylinder (9) of a hydraulic arrangement, a changeover valve being provided.

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