RU119933U1 - PROTECTIVE SHUT-OFF DEVICE - Google Patents

Abstract

A residual current device (RCD) containing a differential current sensor, a comparison device, an RCD status indicator, an actuator in the control circuit of which a key is included, characterized in that the device is equipped with a leakage current indicator microcircuit, a time delay circuit for the leakage current actuation, an actuation circuit on overvoltage of the network, a remote control circuit of operation, giving a signal to the key, a universal RCD power supply circuit, both from a single-phase and from a three-phase network.

Description

The utility model relates to electrical engineering, to the class of automatic devices for protecting people from electric shock and increasing the fire safety of residential buildings.

A device for protective shutdown (RCD) of an electric alternating current network. This device contains a leakage current sensor, a threshold element with a predetermined threshold and an actuator interconnected so that the output of the leakage current sensor is connected to the input of the threshold element, and the input of the actuator is connected to the output of the threshold element. In the RCD, a peak rectifier, a buffer amplifier and an inertial RC circuit are additionally connected so that the output of the leakage current sensor is connected to the input of the peak rectifier, its output is connected to the input of the buffer amplifier, to the output of which a threshold element is connected through the inertial RC circuit, to the output of which is connected to the executive body.

The reasons that impede the receipt of a technical result by analogy, which is provided by the claimed utility model, are as follows. Due to the lack of leakage current indicator microcircuits in these RCDs, the time delay circuit of the leakage current, the circuit for overvoltage, the remote control circuit of the trip signaling the key, as well as the universal power circuit of the RCD, both single-phase and from a three-phase network, the stability of operation by leakage current is reduced, the temperature stability of the RCD is not ensured (reliability decrease), the power consumption is increased, the supply voltage is increased (in this case, more than Ogoy capacitor).

Consumer electrical equipment is not sufficiently protected.

These RCDs cannot be installed to protect group (several) consumer lines. In these RCDs there is no remote operation control circuit, which does not provide the convenience of operational control, as well as the ability to connect a fire or other alarm.

In addition, in these RCDs there is no universal RCD power supply circuit, both from a single-phase and from a three-phase network. This makes it impossible to implement the operation of RCDs in both single-phase and three-phase networks, i.e. narrows the functionality of the RCD.

As the closest analogue, UZO is adopted according to the certificate for utility model No. 31688 "Residual current circuit breaker". This device contains a differential current sensor, a comparison device and an actuator, in the control circuit of which is included a key whose input is connected to the output of the said comparison device. The RCD also contains a capacitor connected through the rectifier to the network, and an RCD status indicator connected to the capacitor through the key. Two separate keys are included in the control circuit of the executive body and in the indicator circuit. The indicator can be either light or sound. In the RCD, a two-color indicator light is applied, turned on so that when the key is triggered, the color of the indicator glow.

The signs of the closest analogue, coinciding with the essential features of the claimed utility model are as follows.

The residual current device (RCD) contains a differential current sensor, a comparison device, an RCD status indicator, an actuator, in the control circuit of which a key is included.

The reasons that impede the obtaining of a technical result for the closest analogue, which is provided by the claimed useful one, are the same as for the analogue described above.

The essential features of the claimed useful are as follows. The residual current device (RCD) contains a differential current sensor, a comparison device, an RCD status indicator, an actuator, in the control circuit of which a key is included. U 30 is equipped with a leakage current indicator microcircuit, a time delay circuit for the leakage current, a circuit for exceeding the mains voltage, a remote control circuit for triggering a signal to the key, a universal RCD power supply circuit, both from a single-phase and a three-phase network.

Unlike the closest analogue, the proposed device is equipped with a leakage current indicator microcircuit, a time delay circuit for the leakage current, an overvoltage circuit for the mains voltage, a remote control circuit for triggering a signal to the key, a universal RCD power supply circuit, both from single-phase and from three-phase network.

The RCD is equipped with a leakage current indicator chip. This allows you to increase the stability of operation according to the leakage current, provides high temperature stability of the RCD, reduce power consumption, lower the supply voltage (in this case, a cheaper capacitor is required). Thus, the reliability and performance of the RCD are increased.

The RCD is equipped with a time delay circuit for leakage current. This allows the installation of RCDs to protect group (several) consumer lines, improves its operational qualities and expands the functionality of RCDs.

The RCD is equipped with a trip circuit for overvoltage of the network. This allows you to protect the equipment of consumer electrical installations, i.e. to increase the reliability of RCDs and its operational qualities.

The UZO is equipped with a remote operation control circuit that sends a signal to the key, which ensures the convenience of operational control up to 1 km. 500 m., As well as the ability to connect a fire or other alarm. This increases the operational qualities of the RCD, expands its functionality.

The RCD is equipped with a universal circuit of the RCD, both from a single-phase and from a three-phase network. This makes it possible to implement the operation of RCDs in both single-phase and three-phase networks, i.e. expands the functionality of UZO and improves its operational qualities.

The technical result manifested in the manufacture, or when using the proposed utility model, is to increase reliability, improve performance, expand functionality.

The essence of the utility model is illustrated in the drawing.

The device consists of an executive body 1, a differential current sensor 2, a comparison device 3, a microcircuit of a leakage current indicator 4, a universal power circuit 5, an RCD status indicator 6, a time delay circuit for a leakage current 7, a remote control circuit for a trip 8, and a trip circuit for excess voltage of the network 9, key 10.

The inventive residual current device operates as follows. The universal power supply circuit 5 connected to the load line ensures stable operation of the comparison device 3, the leakage current indicator microcircuit 4, the operation remote control circuit 8 and the status indicator 6, which is on when the RCD is in operation and does not light when the RCD is off. If a differential current appears in the load line (leakage current or earth fault), the differential current sensor 2 sends a signal to the comparator 3, which sends a signal to the chip of the leakage current indicator 4. This chip sends a signal to the key 10, which sends a signal to shutdown of the executive body 1. In an RCD with a time delay circuit of the signal, the leakage current indicator microcircuit 4 supplies a signal to the time delay circuit of the leakage current 7, which supplies the signal to key 10 with the required time delay th. The actuation remote control circuit 8, when manually or automatically actuated, sends a signal to key 10. In the event of an excess voltage in the load line, the actuation circuit to exceed the voltage of network 9 sends a signal to key 10. In this regard, the RCD ensures a stable shutdown when a differential current occurs (if necessary, with a time delay), by a signal from a remote control or when the mains voltage is exceeded.

Claims (1)

A residual current device (RCD) containing a differential current sensor, a comparison device, an RCD status indicator, an actuator whose key circuit is included in the control circuit, characterized in that the device is equipped with a leakage current indicator chip, a time delay circuit for the leakage current, and a trip circuit when the network voltage is exceeded, by a remote operation control circuit that sends a signal to the key, by a universal RCD power supply circuit, both from a single-phase and from a three-phase network.