KR200275529Y1 - Displaying circuit for displaying abnormal status of electronic apparatus with a lamp of a switchboard - Google Patents

Abstract

The present invention relates to an abnormal state display circuit used for a switchboard indicator light that is blinked in an abnormal state of an electrical device connected to the switchboard so that the switchboard manager can easily identify the switchboard. An earth leakage breaker and a main contact switch are connected in series between a three-phase AC power supply of a phase and a predetermined electric device as a load, and a relay for detecting an abnormal state of the electric device is provided in the R and T phases between the main contact switch and the electric device. An abnormal state display circuit for visually displaying the abnormal state of the electrical equipment mounted on the switchboard; A first switching unit connected in parallel to each of the S-phase and the T-phase between the earth leakage breaker and the main contact switch, and the second switching unit for resetting the on / off driving of the electric machine, and the second switching unit for resetting the indication of the abnormal state of the electric machine. A first abnormal state display unit having first to third display units for visually displaying on / off / ideal states of the electric device, respectively; A power supply unit for converting AC power applied to both ends of the contact portion of the third display unit into a DC power source in an abnormal state of an electric device, an oscillation unit for switching inflow of DC power applied from the power supply unit at a predetermined cycle, and operation of the oscillation unit And a second abnormal state display unit having a light emitting diode which is flicker-driven by a DC power supplied at a predetermined cycle to indicate an abnormal state of the electric device.

Description

Displaying circuit for displaying abnormal status of electronic apparatus with a lamp of a switchboard}

The present invention relates to an abnormal state display circuit of an electrical equipment, and in particular, an abnormal state such as overload, overcurrent, short circuit, or phase loss in operating phase of an electrical equipment connected to a switchboard is blinked, and the switchboard manager operates the switchboard. It is about an abnormal state display circuit used for the switchboard indicator which can be easily identified.

In general, the switchboard is connected between an external operating power source and various electric devices, and an on / off drive switch for controlling the on / off operation of the electric device and a red / green on / off driving lamp for displaying the operation state of the electric device. Refers to an electrical device equipped with a (distribution board indicator light).

In addition, the switchboard is equipped with a separate emergency lamp is to display to the manager when the abnormal state of the electrical equipment. However, in a factory or a department store where the number of switchboards is relatively large, a plurality of switchboard indicators displaying red / green / yellow simultaneously emit light, which causes a problem that an administrator cannot easily identify a switchboard displaying an abnormal state.

The present invention is conceived in view of the above circumstances, the flashing operation in the abnormal state of the electrical equipment connected to the switchboard, the abnormal state display circuit used for the switchboard indicator light so that the switchboard manager can easily identify the switchboard The purpose is to provide.

1 is a circuit diagram illustrating a circuit configuration of a first abnormal state display unit used in a switchboard indicator light according to an embodiment of the present invention.

FIG. 2 is a circuit diagram illustrating a circuit configuration of a second abnormal state display unit connected to the first abnormal state display unit of FIG. 1. FIG.

3 is an external perspective view illustrating an external configuration of a switchboard indicator to which the first and second abnormal state display units illustrated in FIGS. 1 and 2 are applied.

4 is an operation state diagram for describing an operation of the first abnormal state display unit illustrated in FIG. 1.

*** Explanation of symbols for the main parts of the drawing ***

10: power supply unit, 11: rectifier unit,

20: oscillator, 21: multivibrator,

100: first abnormal state display unit, 200: second abnormal state display unit,

Mg0: Main contact switch, Mg1 ~ Mg3, Mr1 ~ Mr3: Magnetic switch,

NB: Earth Leakage Circuit Breaker, MC1, MC2: Magnetic Coil,

SW1 to SW3: first to third switches, E1: relays,

E2: relay switch, Z1: electric equipment

R1 ~ R7: Resistor, C1 ~ C4: Capacitor,

Q1: transistor, B1: varistor,

ZD1: Zener Diode, D1: Diode,

L1 to L3: First to third light emitting diodes.

The abnormal state display circuit used for the switchboard indicator light according to the present invention for achieving the above object is the earth leakage breaker and the main contact switch is connected in series between the three-phase AC power supply of the R-phase, S-phase, T-phase And an abnormal state display circuit mounted on a switchboard having a relay for sensing an abnormal state of the electrical device, on the R and T phases between the main contact switch and the electrical device, for visually displaying an abnormal state of the electrical device. A first switching unit connected in parallel to each of the S-phase and the T-phase between the earth leakage breaker and the main contact switch, and the second switching unit for resetting the on / off driving of the electric machine, and the second switching unit for resetting the indication of the abnormal state of the electric machine. A first abnormal state display unit having first to third display units for visually displaying on / off / ideal states of the electric device, respectively; A power supply unit for converting AC power applied to both ends of the contact portion of the third display unit into a DC power source in an abnormal state of an electric device, an oscillation unit for switching inflow of DC power applied from the power supply unit at a predetermined cycle, and operation of the oscillation unit And a second abnormal state display unit having a light emitting diode which is flicker-driven by a DC power supplied at a predetermined cycle to indicate an abnormal state of the electric device.

Also, in the present invention, the power supply unit includes a capacitor and a resistor connected in parallel to step down the AC power applied to the third display unit, a varistor for blocking a surge voltage applied when the electric device is turned on / off, and an AC And a rectifier for converting a power source into a DC power source, and another capacitor and a resistor connected to the rectifier to form a smoothing circuit.

In the present invention, the oscillator is a transistor for switching the current path so that a DC current of a predetermined current or more from the power supply unit is periodically supplied to the light emitting diode connected to the third display unit, and connected to the base end of the transistor on / off A multi-vibrator for adjusting a driving period, a predetermined resistance circuit for adjusting an amount of current flowing through the light emitting diode according to on / off driving of the transistor, and a zener diode for supplying stable operating power to a power input terminal of the multi-vibrator. Characterized in that configured to include.

Therefore, according to the configuration described above, the flashing operation is performed in the abnormal state of the electrical equipment connected to the switchboard, so that the switchboard manager can easily identify the switchboard.

Hereinafter, embodiments of the present invention will be described with reference to the accompanying drawings.

1 is a circuit diagram illustrating a circuit configuration of a first abnormal state display unit 100 used in a switchboard indicator light according to an embodiment of the present invention.

The first abnormal state display unit 100 shown in FIG. 1 is configured to drive and turn on the electric device Z1 (for example, a motor) driven by using a three-phase (R phase, S phase, T phase) AC power source. The circuit configuration to display the on / off / error status is shown.

The first abnormal state display unit 100 of FIG. 1 includes a main contact switch MgO, a plurality of magnetic switches Mg1 to Mg3 and Mr1 to Mr3, and magnetic coils MC1 and MC2 for driving them on and off. do. The main contact switch MgO and the magnetic switches Mg0 to Mg3 of FIG. 1 are integrally configured to drive on when a current flows in the magnetic coil MC1, and the magnetic switches Mr1 to Mr3 are magnetic coils MC2. It is integrally configured to drive on when current flows in.

On the other hand, the magnetic switch (Mg1, Mg2, Mr2, Mr3) on the right side of the bar that connects the contacts in the symbol of the magnetic switch (Mg1 ~ Mg3, Mr1 ~ Mr3) of Figure 1 is connected between the contacts at the time of driving In addition, for example, A contact element is shown to cut off the contact between the off-drive. And the magnetic switch (Mg3, Mr1) having a bar between the contacts on the left side represents a B contact element, for example, which blocks the contact between the on-drive and connects the contact between the off-drive.

In addition, in FIG. 1, the first to third switches SW1 to SW3 use a push button switch that is switched according to a button operation of an administrator. The first switch SW1 is normally disconnected. The first switch SW1 remains connected only while a button not shown is pressed. The second and third switches SW2 and SW3 are normally connected. It is a pushbutton switch that will be cut off only while this is pressed.

In FIG. 1, an earth leakage breaker NB and a main contact switch MgO are connected in series between each phase of the three-phase AC power source and the electric device Z1, and an R phase between the main contact switch Mg0 and the electric device Z1. In the and T phases, a relay E1 (for example, an overcurrent relay EOCR) for detecting an abnormal state of the electric device Z1 is connected in parallel.

In FIG. 1, the first and second switching units 1 and 3 for selectively operating on / off driving of the electric device Z1 are provided on the S phase and the T phase between the earth leakage breaker NB and the main contact switch MgO. The first to third display units 5, 7, 9 for visually displaying the on / off / abnormal state of the electric device Z1 are connected in parallel.

The first switching unit 1 includes a first switch SW1 for turning on the electric device Z1, a second switch SW2 for turning off the electric device Z1, and a magnetic coil MC1. And the magnetic switch Mr1 are sequentially connected in series, and the magnetic switch Mg1 is connected in parallel between both terminals of the first switch SW1.

The second switching unit 3 includes a third switch SW3 for resetting the indication of the abnormal state of the electric device Z1, a relay switch E2 switched and switched according to the detection of the abnormal state of the relay E1, The magnetic coil MC2 is sequentially connected in series, and the magnetic switch Mr3 is connected in parallel between both terminals of the relay switch E2.

When the relay E1 detects an abnormal state of the electric device Z1, the relay switch E2 is driven on and connects the connected contacts, and in other cases, the relay switch E2 is turned off to block the contacts.

In addition, the first display unit 5 is a magnetic switch (Mg3) and a first light emitting diode (L1) for displaying the off-drive state of the electrical device (Z1) in sequence are connected in series, the second display unit (7) The magnetic switch Mg2 and the second light emitting diode L2 for displaying the on-drive state of the electric device Z1 are sequentially connected in series, and the third display unit 9 is the magnetic switch Mg2; The second abnormal state display unit 200 (between the contacts a and the contact b), which will be described later, for displaying the abnormal state of the electric device Z1 is sequentially connected.

Hereinafter, an operation of the first abnormal state display unit 100 having the configuration of FIG. 1 will be described with reference to FIG. 4. 4 is an operation state diagram for describing an operation of the first abnormal state display unit 100 shown in FIG. 1.

First, the operation of the power-off state in which the three-phase AC power is not supplied to the electric device Z1 will be described. The operating power applied to the first display unit 5 from the S-phase and T-phase of the three-phase AC power is a magnetic switch ( Since Mg3 is in the "connected" state, the first light emitting diode L1 indicating the off state of the electric device Z1 is turned on.

When the manager of the switchboard presses the first switch SW1 to supply operating power to the electric device Z1, the first switch SW1 is maintained in the "connected" state while being pressed. The operating power applied to the first switching unit 1 is the first and second switches (SW1, SW2) in the "connected" state, the magnetic switch (Mr1) is also in the "connected" state, so the magnetic coil MC1 on-drive Let's go.

Therefore, the main contact switch Mg0 and the magnetic switches Mg1 to Mg3 interlocked with the magnetic coil MC1 are switched, respectively, so that the main contact switches MgO and the magnetic switches Mg1 and Mg2 are connected. The magnetic switch Mg3 is in the "blocking" state.

As the magnetic switch Mg2 is switched to the “connected” state, the operating power applied to the second display unit 7 turns on the second light emitting diode L2 indicating the on state of the electric device Z1 and turns on the magnetic. As the switch Mg3 is switched to the "blocking" state, the first light emitting diode L1 indicating the off state is turned off.

Then, when the electrical device Z1 is in an abnormal state during operation, the relay E1 that detects this switches the relay switch E2 to a "connected" state temporarily. Accordingly, the operating power applied to the second switching unit 3 turns on the magnetic coil MC2 since the third switch SW3 and the relay switch E2 are in the "connected" state.

Therefore, the magnetic switches (Mr1 to Mr3) interlocked with the magnetic coil (MC2) are switched each, so that the magnetic switch (Mr1) is in the "blocking" state, the magnetic switches (Mr2, Mr3) is in the "connected" state. As the magnetic switch (Mr1) is in the "blocking" state, the supply of operating power to the magnetic coil (MC1) is interrupted, and the magnetic switches (MgO, Mg1 to Mg3) are switched to switch, respectively, so that the main contact switch (Mg0) and the magnetic switch are switched. Mg1 and Mg2 are in the "blocking" state, and the magnetic switch Mg3 is in the "connecting" state.

In this case, supply of operating power to the electric device Z1 is cut off, and the first light emitting diode L1 indicating the off state of the electric device Z1 is turned on again, and the second light emitting diode L2 indicating the on state is turned on. Becomes extinguished. As the magnetic switch Mr2 is in the "connected" state, the operating power is supplied to the second abnormal state display unit 200, which will be described later, of the third display unit 9.

After confirming that the electrical device Z1 has been restored to its normal state, the manager presses the third switch SW3 to reset the indication of the abnormal state of the electrical device Z1, and the third switch SW3 is " blocked " It is switched to the "state to cut off the operating power supply to the magnetic coil (MC2). Subsequent operations are the same as those in the above-described power-off state in which the three-phase AC power is not supplied to the electric device Z1, and thus a detailed description thereof will be omitted.

Hereinafter, the second abnormal state display unit 200 will be described with reference to FIG. 2.

FIG. 2 is a circuit diagram illustrating a circuit configuration of the second abnormal state display unit 200 connected to the contacts a and b of the first abnormal state display unit 100 of FIG. 1.

The second abnormal state display unit 200 shown in FIG. 2 includes a power supply unit 10 for converting an AC power applied to both ends a and b of the third display unit 9 into a DC power source, and the power supply unit 10. And a flicker driven by the oscillation unit 20 for switching the inflow of the DC power applied from the predetermined cycle and the DC power supplied at the predetermined cycle according to the operation of the oscillation unit 20 to indicate an abnormal state of the electric device Z1. It consists of three light emitting diodes L3.

In FIG. 2, the power supply unit 10 is a surge applied during the on / off driving of the capacitor C1, the resistor R1, and the electric device Z1 for a predetermined level step-down of the AC power applied to the third display unit 9 ( Varistor (TNR) B1 for cutting off the surge voltage, rectifier 11 for converting AC power into DC power, capacitor C2 and resistor R2 constituting a smoothing circuit are provided.

In FIG. 2, the oscillator 20 includes a transistor Q1 for switching a current path such that a DC current of a predetermined current or more is periodically supplied from the power supply unit 10 to the third light emitting diode L3, and the transistor Q1. A multi-vibrator 21 connected to a base end of the on / off driving cycle and an amount of current flowing through the third light emitting diode L3 according to on / off driving of the transistor Q1. A predetermined resistance circuit and a zener diode ZD1 for supplying stable operating power to the power input terminal Vd of the multivibrator 21 are provided.

Meanwhile, in the present embodiment, the third light emitting diode L3 is configured to be driven by a DC power source, and the first and second light emitting diodes L1 and L2 of FIG. 1 are configured to be driven by an AC power source. The type of power source can be selectively configured.

The resistor circuit includes a resistor R5 connected between the collector terminal of the transistor Q1 and the output terminal of the power supply unit 10, and a resistor connected between the collector terminal of the transistor Q1 and the cathode of the third light emitting diode L3. R6) and a resistor R7 connected between the collector terminal and the emitter terminal of the transistor Q1.

In addition, the anode of the third light emitting diode L3 is connected to the output terminal of the power supply unit 10, and the resistor R7 has a small amount such that the third light emitting diode L3 is not driven when the transistor Q1 is turned off. High resistance is used as compared with the resistors R5 and R6 so that current flows. In the present embodiment, when the impedance of the third light emitting diode L3 is about 50 mA, the resistance R7 is set to about 10 mA. In addition, the resistor R7 forms a so-called neutral point so that the switching operation of the transistor Q1 is stable.

Meanwhile, the cathode of the zener diode ZD1 is connected in series to the power supply unit 10 through the resistor R3 and the diode D1 and connected in parallel to the capacitor C3 connected to the ground terminal. The multivibrator 21 is a well-known circuit for regularly outputting a high or low level signal of a predetermined period through its output terminal OUT. For example, the multi-vibrator 21 is configured by using a CMOS / NOR type IC circuit. It will be omitted.

Hereinafter, the operation of the second abnormal state display unit 200 of FIG. 2 having the above-described configuration will be described.

In the abnormal state of the electrical device Z1, the AC power applied between the contacts a and b according to the operation of the first abnormal state display unit 100 of FIG. 1 is a DC power stepped down by a predetermined level through the power supply unit 10 of FIG. 2. The multivibrator 21 of FIG. 2 is operated to drive the transistor Q1 on / off in accordance with its operation period.

When the transistor Q1 of FIG. 2 is turned on, a first current path of the power supply unit 10-> third light emitting diode L3-> resistor R6-> transistor Q1 is formed, and the first current is formed. The DC power flowing through the path turns on the third light emitting diode L3.

When the transistor Q1 of FIG. 2 is turned off, a second current path of the power supply unit 10-> third light emitting diode L3-> resistor R6-> resistor R7 is formed, and the resistor R7 is formed. ) Has a higher resistance than other elements in the circuit, so that only a small amount of current flows in the second current path so as not to drive the third light emitting diode L3, and the third light emitting diode L3 It will be turned off.

Therefore, in the abnormal state of the electrical device Z1, the third light emitting diode L3 repeats the flashing operation according to the operation period of the multivibrator 21, and the manager of the switchboard looks at the electrical device Z1 in the abnormal state. It can be easily confirmed.

FIG. 3 is an external perspective view illustrating an external configuration of a switchboard indicator to which the first and second abnormal state display units 100 and 200 illustrated in FIGS. 1 and 2 are applied, and shown in FIGS. 3 and 2. The same reference numerals are given to the same components.

The first abnormal state display unit 100 of FIG. 1 is electrically connected to the outside through contacts a to contact d of the switchboard indicator, and the third switch SW3 in the first abnormal state display unit 100 and the second of FIG. The abnormal state display unit 200 is mounted inside the switchboard indicator.

In FIG. 3, the third light emitting diode L3 is physically connected to the third switch SW3 of FIG. 1 while the third switch SW3 is pressed when the manager presses the third light emitting diode L3 downward. It is configured to switch to the "blocking" state, and the physical connection relationship between the third light emitting diode L3 and the third switch SW3 is general to those skilled in the art, and a detailed description thereof will be omitted.

As described above, according to the present invention, in case of abnormal state such as overload, overcurrent, short circuit, operation phase of phase and phase of electric equipment connected to the switchboard, the LED of the LED on the distribution board periodically flashes to operate. By identifying the switchboard more easily, it is possible to quickly cope with the abnormal state of the electrical equipment.

Claims (5)

An earth leakage breaker and a main contact switch are connected in series between a three-phase AC power supply of R phase, S phase, and T phase and a predetermined electric device, and an abnormal state of the electric device is present in the R phase and T phase between the main contact switch and the electric device. An abnormal state display circuit for visually displaying an abnormal state of the electrical equipment is mounted on a switchboard having a relay for detecting a; A first switching unit 1 connected in parallel to each of the S-phase and the T-phase between the earth leakage breaker and the main contact switch to select an on / off drive of the electric device; A second switching unit 3 for resetting an abnormal state indication of the electric device, A first abnormal state display unit 100 including first to third display units 5, 7, and 9 for visually displaying on / off / deviant states of the electric device; Power supply unit 10 for converting the AC power applied to the both ends of the contact a, b of the third display unit 9 in the abnormal state of the electrical equipment to DC power, Oscillator 20 for switching the inflow of the DC power applied from the power supply unit 10 in a predetermined cycle, According to the operation of the oscillator 20, the second abnormal state display unit 200 having a third light emitting diode L3 which is flicker-driven by a DC power supplied at a predetermined cycle to display an abnormal state of the electrical device Z1 is provided. Abnormal state display circuit used for the switchboard indicator, characterized in that configured to include. The method of claim 1, The power supply unit 10 includes a capacitor C1 and a resistor R1 connected in parallel to each other to step down a predetermined level of AC power applied to the third display unit 9, Varistor B1 for cutting off the surge voltage applied when the electric device Z1 is turned on / off, Rectifier 11 for converting AC power into DC power, and An abnormal state display circuit used for a switchboard indicator light, comprising a capacitor (C2) and a resistor (R2) connected to the rectifier (11) to form a smoothing circuit. The method according to claim 1 or 2, The oscillator 20 includes a transistor Q1 for switching the current path so that a DC current of a predetermined current or more from the power supply unit 10 is periodically supplied to the light emitting diode L3 connected to the third display unit. A multivibrator 21 connected to the base end of the transistor Q1 to adjust an on / off driving period; A predetermined resistance circuit for controlling an amount of current flowing through the light emitting diode L3 according to on / off driving of the transistor Q1; And a zener diode (ZD1) for supplying stable operating power to the power input terminal (Vd) of the multivibrator (21). The method of claim 3, wherein The resistor circuit includes a resistor R5 connected between the collector terminal of the transistor Q1 and the output terminal of the power supply unit 10, and a resistor R6 connected between the collector terminal of the transistor Q1 and the cathode of the light emitting diode L3. ) And a resistor (R7) connected between the collector terminal and the emitter terminal of the transistor (Q1), An anode of the third light emitting diode L3 is connected to an output terminal of the power supply unit 10, and the resistor R7 has a high resistance such that the third light emitting diode L3 is not driven when the transistor Q1 is turned off. Abnormal state display circuit used for the switchboard indicator, characterized in that consisting of. The method of claim 1, The first abnormal state display unit 100 is electrically connected through an external contact point of a switchboard indicator, and the second abnormal state display unit 200 is used for a switchboard indicator light, characterized in that it is configured to be mounted inside the switchboard indicator. Status display circuit.