NL192589C - Switching machine. - Google Patents

Description

1 192589

Switching machine

The invention relates to a switching device with phase contacts and a zero contact, the interrupting means comprising a first toggle switch for the phase contacts, which can be operated with a first operating means, and a second toggle switch for the zero contact, which can be operated with a second operating means wherein the first actuating means is manually engageable, and wherein the first and second actuating means interlock such that movement of the first toggle switch from the open position to the closed position also moves the second toggle switch of the open position to the closed position, whereby the zero contact can only be opened with open phase contacts.

Such a switching device is known from Swiss patent 586,456. This switching device comprises a power switch for the phase contacts and a disconnecting switch for the neutral contact. The two switches are arranged side by side, such that the toggle switches are coaxial.

The zero contact actuation means includes a radial projection located within the switch housing in both end positions. The actuator for the phase contacts is commercially shaped and permanently protrudes from the housing to be gripped by hand. In addition, the handle is formed with an axially projecting arm which shields said projection to make it inaccessible in the situation where both types of contacts are closed. To open the zero contact, first turn the handle to the open position and then use a tool, such as a screwdriver, to grip the projection to move it. The arm on the handle is also provided with a carrier face which faces towards the closed position, with which the protrusion can be taken along when the handle is turned to bring the phase contacts from the open to the closed position, and thereby also close the zero contact.

A drawback of the known switching device is that the rocker switch for the zero contact in one direction can only be operated simultaneously with the rocker switch for the phase contacts and in the other direction only with the aid of a tool, namely after conversion of the rocker switch for the phase contacts can be operated.

The object of the invention is to improve on this and to that end provides a switching device of the type mentioned in the preamble, in which the second operating means extends radially outside the first operating means to form a recess with a supporting surface facing the open position thereof, wherein the trip angle of the second toggle switch is greater than that of the first toggle switch and the turn angle of the second toggle switch is less than that of the first toggle switch.

As a result of the measures according to the invention, both control panels can be engaged by hand. When engaging the (second) rocker switch for the zero contact to convert it from the closed to the open position, the (first) rocker switch actuator for the phase contacts will also be engaged and carried along during further movement first the phase contacts are opened and then the zero contact. In this operation, the operator need not be concerned with the movement of one operating part: the other follows automatically. The reverse is the case when converting from the open to the closed position.

40 With the engagement and movement of the operating part for the phase contacts, the operating part for the zero contact is carried along. Even then only one operating part needs to be engaged. In this conversion, the neutral contact first closes and then the phase contacts close. A further advantage is that the zero contact can be switched on, without the need to switch on the phase contacts.

The invention will be elucidated with reference to the drawing.

Figure 1 shows an exploded side view of the automatic switch according to the invention.

Figure 2 shows a left-hand view of the automatic switch from Figure 1.

Figure 3 shows the same view as in Figure 2 with the circuit breaker and the isolating switch shown separately.

50

In figure 1, 1 indicates the interrupting device of the zero contact 2, wherein the zero contact is closed in the drawn position. The zero connection terminals are shown with 3. By turning the operating member 4 counterclockwise and seen as shown in figure 1, the zero contact can be opened after the operating member 4 has passed through an angle β, for example.

In Figures 2 and 3, in addition to the actuator 4 for the zero contact 2, the actuator 5 is also shown for the interruption device of the phase contacts not shown.

The interrupting member 5 now rests against operating member 4 or in a recess 6 which is arranged

Claims (2)

1925B9 2 in the actuator 4. The phase contacts are connected to terminals 7. The operation of the automatic switch according to the invention is now as follows. In the position shown in figure 1, both the zero contact and the phase contacts are closed. If the operating member 4 in figure 1 is now rotated counterclockwise, the operating member 5 of the phase contacts will be carried along. The switching angle α for interrupting the phase contacts is selected smaller than the switching angle β for interrupting the zero contact, so that when the switch-off device 4 switches off, an angle β-α later than the control device 5. 10 Without manual operation of the control device 4 however, the operating member 5 can switch off automatically in the event of, for example, an overload or a short circuit. Conversely, when switching on again manually, the control member 4 will first switch on for the control member 5, i.e. angle β-α earlier. With this device it is thus achieved that the zero contact can never switch power on or off. 15 1. Switching device with phase contacts and a zero contact, the interrupting means comprising a first phase contact rocker switch, which can be operated with a first operating means, and a second rocker switch for the zero contact, which can be operated with a second operating means which is coaxial with the first actuating means, the first actuating means being manually grippable, and the first and the second actuating means engaging such that movement of the first toggle switch from the open position to the closed position also movement of the second toggle switch from the open position to the closed position, whereby the neutral contact can only be opened with open phase contacts, characterized in that the second actuating means (4) extends radially outside the first actuating means (5) about a recess (6) with to form a support surface facing the open position therefor, wherein the trip angle (β) of the second toggle switch is greater than that of the first toggle switch and the turn angle of the second toggle switch is less than that of the first toggle switch. Switching device according to claim 1, characterized in that the first toggle switch automatically moves to the open position under a certain load, while the second toggle switch remains in the closed position. Hereby 1 sheet drawing