RU35479U1 - Residual Current Device - Google Patents

Description

2003128776

Iliijiillliilllililli

Residual Current Device

The invention relates to electrical engineering, in particular to automatic devices for protecting people from electric shock, and also designed to ensure electrical and fire safety in electrical installations of alternating current in residential, public and industrial buildings by shutting down in emergency conditions both on the load side and on side of the food.

Known circuit breaker with a combination of protection type VKZ (manufactured by TESS Engineering, Cheboksary (Technical description and operating manual TESS 731146.001 TO), containing a circuit breaker with an on and off handle and with connecting terminals, a unit rigidly attached to it electronic and differential current sensor.

However, the known device is inconvenient during installation and not reliable enough.

The closest in technical essence to the claimed solution is a combined protective circuit breaker (certificate for utility model. No. 0015240 according to application No. 2000114372/20, bull. No. 29/2000), containing a circuit breaker with an on and off handle and with connecting terminals, an electronic unit rigidly attached to it, a differential current sensor and an output cover. The disadvantages of the known device include:

1) the device is not technologically advanced due to the large number of elements of the output cover;

2) the device is not reliable due to the large number of elements of the output cover and the presence of intermediate transitions, the connecting terminals of the automatic switch is a conductor, which is an element of the connecting terminal of the output cover;

    H 02 HI / 00

3) the device does not have protection for the connection terminals against electric shock from the consumer side;

4) the device is large due to the presence of an excess element of the connecting terminal of the output cover.

The technical result of the invention is to increase the manufacturability, reliability, degree of protection of the connecting terminals from the consumer from electric shock and reducing the size of the device.

The technical result is achieved by the fact that the known residual current device, comprising an automatic switch with an on and off handle and connection terminals, an electronic unit rigidly attached to it, a differential current sensor, is additionally equipped with a lower case containing at least two guide channels from electrical insulation material passing to the connecting terminals of the circuit breaker automatic through the internal space of the differential current sensor installed lower body.

The essence of the invention lies in the fact that the device is additionally equipped with a lower case, containing at least two guide channels of electrical insulation material, passing to the connecting terminals of the automatic switch through the internal space of the differential current sensor installed in the lower case, which increased manufacturability due to the implementation enclosures as one element; reliability - by minimizing the number of elements in the lower case, where the transitions connecting terminals of the circuit breaker of automatic conductors are working transitions for the consumer of electricity; the degree of protection of the connecting terminals from electric shock due to the presence of guide channels from the insulating material in the lower case;

the dimensions of the device have decreased due to the lack of additional elements.

The accompanying drawings show the proposed device:

In FIG. 1 - general view of the device;

Figure 2 is a left view;

In Fig.Z is a bottom view;

In Fig.4 is a section bB in Fig.Z;

In Fig.Z - section aa in Fig.2 for a single-phase (two-wire) device;

In Fig.6 is a section aa in Fig.2 for a three-phase (four-wire) version of the device, where the following notation is introduced:

1- automatic switch;

2- electronic unit;

3- differential current sensor (for single-phase device design);

4- differential current sensor (for three-phase execution of the device);

5- handle on and off;

6- lower case;

7- guiding channels (for single-phase execution);

8-guiding channels (for three-phase execution);

9- connecting terminals of the circuit breaker automatic (for single-phase execution of the device);

10- connecting terminals of the circuit breaker automatic (for three-phase version of the device).

The residual current device contains an automatic switch 1 (in Figs. 1, 3 and 4) with an on and off handle 5 (in Figs. 1, 2 and 3) and two connection terminals 9 (for single-phase execution) (in Figs. 3, 4 and 5) and four connecting

terminals 10 (for three-phase execution) (in Fig.6), the differential current sensor 3 (for single-phase execution) (in Figs. 4 and 5) and the differential current sensor 4 (for three-phase execution) (in Fig.6). The device also contains a lower housing 6 (in figures 1, 3, 4, 5 and 6) with guide channels 7 (for single-phase execution) (in figures 1, 3, 4 and 5) and guide channels 8 (for three-phase execution) of electrical insulating material (Fig.6) passing to the connecting terminals 9 (for single-phase device design) and connecting terminals 10 (for a three-phase device design) automatic circuit breaker, respectively.

The inventive device operates as follows. When manually operating the on / off knob 5 of the automatic 1 switch, its contacts close and supply power to the protected electrical installation (not shown in the drawings), the power leads of which are passed through the guide channels 7 or 8 of the lower case 6 and are connected to the connecting terminals of the automatic switch 9 or 10 respectively. If the entire system is operational and there is no leakage current to earth, then the signal from the differential current sensor 3 or 4 is zero. Therefore, there is no effect on the automatic switch 1 from the side of the electronic unit 2.

When a person gets under voltage or a breakdown in the insulation of the electrical conductors, a leakage current to earth occurs and a signal appears at the output of the sensor 3 or 4. If this leakage current to earth is more than permissible, the electronic unit 2 is activated and, acting on the circuit breaker automatic 1, turns it off and stops the supply of electricity to the electrical installation.

Claims (1)

Residual current device, comprising an automatic switch with an on and off handle and with connecting terminals, an electronic unit rigidly attached to it, a differential current sensor, characterized in that it is additionally equipped with a lower case containing at least two guide channels made of electrical insulating material passing to the connecting terminals of the circuit breaker automatically through the internal space of the differential current sensor installed in the lower case.