FI72406B - PROCEDURE FOR THE INDICATION OF REFERENCE TO A STOPPING SYSTEM - Google Patents

Description

1 72406

Method and apparatus for indicating the position of switching devices

The invention relates to a method and a device for detecting the position of a switching device by means of a control device. In the arrangement according to the invention, the switching device is controlled via a spring control device, and the position of the switching device is indicated by means of the position display of the control shaft of the control device going to the spring control device. Such switch devices may be isolators, circuit breakers, fuse-10 circuit breakers, circuit breakers, or combinations thereof.

In order to facilitate an understanding of the invention, the following description is limited to the isolators of the above-mentioned switching devices only. After all, separators are used, for example, in electrical plants to separate plant parts and loads when the separator is de-energized or when the load current passes through the separator.

Since the disconnector is de-energized by the disconnector or the load, for example during maintenance or repair, it must also be possible to reliably and reliably indicate the current position of the disconnector 20 for safety reasons.

Today, the position of the separator is most often indicated by the position of the guide shaft going to the spring control device. If there is a fault in the separator system, for example if the spring control device is broken, the contacts are long or burnt, it is possible that the position of the air is incorrect. Incorrect position indication can also be the result of incorrect or altered adjustment, wear or incorrect control of the separator.

30 The positions thus indicated in the fuse and relay-controlled switch-disconnectors are incorrect after tripping, because the axis of the control unit does not change its position, but still shows the closed position, even if the switch-disconnector has already moved to the open position.

Thus, in currently commonly used systems 35, position mismatches occur in both correctly and incorrectly functioning separators.

2 72406

It is difficult to solve the problem of reliable position detection of the separator, because the position detection directly from the main shaft involves serious risks to personal safety. However, when expressing the position directly from the main axis 5, the systematic misrepresentation of the position of the separator which occurs in connection with fuse or magnetic tripping when using the traditional position display from the spring control device axis is avoided. However, position detection directly from the main axis can lead to dangerous situations. Such a situation may arise if the closing control has not been completely completed, for example due to an incorrectly adjusted or worn control device. In this case, the indicator indicates that the separator is open. At the same time, it is visible to the naked eye that the separator 15 is indeed open. For this reason, it is impossible to imagine that the separator can change to the closed position at any time, e.g. due to vibration. A similar dangerous situation can arise if the isolator contacts are lengthened or burnt and the control pulse is connected due to a previous control attempt.

The object of the invention is therefore to get rid of the disadvantages described above and to provide reliable and reliable mechanical detection of the position of the separator in all situations. With the method according to the invention, this is achieved by using an additional display based on the movement of the main shaft and connected to the position display of the guide shaft of the spring control device.

The basic idea according to the invention is thus to combine the detection from the main axis and the axis of the separator control device so that both the separator and its control device must both be in the same closed or open position before this position is detected.

In the hand control device according to the invention, reliability is guaranteed by implementing the principle according to the method yk-35 with a simple structure. This is achieved in that the device has two overlapping plates at the end of the guide shaft, 3 72406 one of which is connected to the movement of the guide shaft and the other to the movement of the main shaft.

In order to make the position display of the hand control device as clear and easy to read as possible, it is preferred that the top 5 plate rotating with the guide shaft is provided with a window and the lower plate rotating with the separator shaft is provided with markings visible from the window.

The invention will now be described in more detail with reference to the accompanying drawings, in which Fig. 1 shows a side view of a hand control controlling the main axis according to the invention, Fig. 1a shows a detail of the screens in the hand control according to

In Fig. 1, a guide shaft 2 is connected to the spring control device 1 as an input shaft. The shaft pin 3 coming out of the spring control device is attached to the main shaft 4. The transfer plate 6 has a rectangular hole corresponding to the inner shaft in the middle thereof, through which the inner shaft passes. Attached to one end of the inner shaft is a screw 7 in the slot 2a, the base of which is fixed in the groove 8a of the outer sleeve 8. The outer sleeve 8, in turn, is connected to the plate 10 by means of a pin 9 fixed to it. A guide plate 11 with a window 11a, concentric with the plate 10, is fixed to the guide shaft 2, which is on the plate 10

The spring mechanism of the spring control device is not shown in more detail in the figure because it does not fall within the scope of the actual invention. Figure 1 further shows a locking device 12 with which the guide shaft 2 can be locked in either the open or closed position.

Figure 1a shows in more detail the connection of the outer sleeve 8 to the plate 10. A pin 4 72406 9 is attached to the groove 8b in the sleeve 8, which in turn extends through the opening 9b in the body of the device and is fixed to the plate 10.

When it is desired to control the separator to the open position, for example, the control shaft 2 is turned by a knob 13 formed by its end.

The spring mechanism of the spring control device 1 transmits the rotary movement of the guide shaft 2 to the main shaft 4 faster by means of the rotating movement of the guide shaft 2 with the guide shaft 2. The movement 10 of the main shaft 4 is transmitted by means of a transfer plate 6 to the inner shaft 5, which rotates the plate 10 under the plate 11 by means of a screw 7 rotating in the slot 2a, an outer sleeve 8 connected thereto The open position marking 15 is shown at the window 11a of the plate 11. The rest of the plate 10 is invisible under the top plate 11. Figure 2 shows an open 0 mark on the plate 10 at the window 11a of the plate 11. Thus, in the normal situation, both the guide shaft 2 and the main shaft 4 must be in their correct position in order to indicate the open position.

If the position of the separator changes without turning the guide shaft 2, the plate 10 rotates by means of the inner shaft 5, screw 7, outer sleeve 8 and pin 9, whereby a red warning sign on the plate 10 rotates at the window 11a of the uppermost plate 11. Correspondingly, if the main axle does not move to its fully correct position during steering, this red warning sign indicates a fault condition at the window. This always gives an indication of a fault situation in the hand control.

Figures 3a to 3d show the display of the hand control in different situations. Figure 3a shows the separator in the normally open position and Figure 3b in the normally closed position. In this case, both plates 10 and 11 are in the "correct" position, whereby a corresponding "open" or "closed" sign appears below the window 11a. Fig. 3c refers to an uncertain position or a fault situation, in which case the guide shaft is in its normal open position, but a warning sign is displayed at the window 11a because the main shaft is not in the open position. The warning sign is also shown in Fig. 3d, but now the guide shaft 2 is in its closed position, which means that it is an uncertain position caused by the tripping of the separator 5 or a fault situation.

Although the invention has been described above with reference to the example according to the accompanying figures, it is clear that the invention is not limited thereto, but can be modified within the scope of the appended claims. Thus, instead of the mechanical connection according to the figures, the movement of the plate 10 of the example can be realized by means of a movement cable.

Although the invention has been described above with reference to the use of separators, it is clear that the invention is not limited thereto but can be applied to other switching devices within the scope of the appended claims.

Claims (8)

A method of indicating the position of a clutch device by means of an actuator, wherein a main shaft (4) is controlled via a spring actuator (1), and the position of the clutch device is indicated by using a position indicator (2) for the actuator of the actuator (2) of the actuator (2). 11), characterized in that, when specifying the position of the coupling device, a motion based on the main shaft 10 (4) is used, in conjunction with the position indicator (11) for the steering shaft (2) of the spring actuator (2) coupled additional viewer (10). 2. A method according to claim 1, characterized in that the auxiliary pointer (10) and the position indicator (11) of the shaft (2) are joined together so that a normal situation of open or closed position is indicated only by the additional pointer (10). and the steering shaft position indicator (11) indicates this open or closed position. Method according to claim 2, characterized in that an abnormal situation is always indicated when both pointers (10, 11) are not simultaneously in the same open or closed position. Hand control device for controlling the position of the coupling device via a spring actuator (1), which device comprises a guide shaft (2) provided to the spring actuator, characterized in that the device at the end of the control shaft (2) has two discs located on one another (10, 11), one of which (11) is coupled to the movement of the steering shaft (2) and the other (10) to the movement of the main shaft (4). Hand control device according to Claim 4, characterized in that the top plate (11) movable with the guide shaft (2) is provided with a window (11a), and the lower movable disc (11) 10) is provided with visible fronts (11a). Hand control device according to claim 4 or 5, characterized in that the disk (10) movable with the main shaft (4) is coupled to the main shaft (4).