KR200483269Y1

KR200483269Y1 - Power control apparatus

Info

Publication number: KR200483269Y1
Application number: KR2020150001968U
Authority: KR
Inventors: 김병국
Original assignee: 제일전기공업 주식회사; 비엔테크 주식회사
Priority date: 2015-03-30
Filing date: 2015-03-30
Publication date: 2017-04-21
Also published as: KR20160003455U

Abstract

The present invention relates to a power supply relay having a first input contact, a second input contact and an output contact and connecting an AC power of a first input contact to an output contact or a second input contact to an output contact, A load test circuit for outputting a test sense signal that can detect whether there is an abnormality in a load connected through the second input contact and the output contact of the power supply relay and a load test circuit for detecting an abnormality of the power supply relay And a control unit for controlling switching from the second input contact to the first input contact.

Description

[0001] POWER CONTROL APPARATUS [0002]

More specifically, the present invention relates to a power supply control device, and more particularly, to a load connected to a rear end of a power supply control device, for detecting a short circuit or overcurrent of a load connected to the load when the power supply is turned on, , And a power supply control device.

In general, when the supply of the normal power is interrupted due to an electric accident such as a power failure, a short circuit, or an electric power failure, the abnormal power is supplied as a separate power source for operating the selected load To be supplied by an automatic switch.

In addition, in recent years, a power supply control device is configured to include a switch having an electronic control function that is linked to a home network even in the control of a light source. In order to reduce unnecessary power consumption when using various electronic equipment, And a standby power cut-off power supply control device that cuts off the power on the load side when the power is below a predetermined value or an arbitrarily specified power.

However, in the prior art, there is a case where the load is short-circuited due to a construction error when the power is first turned on after the power distribution work. However, since the breaker is automatically operated in such a situation, It is common to check only the lines at the rear end and correct them.

On the other hand, as the electronic control circuit is applied recently, the relay and triac, which are used as switching elements, have structure and characteristics weaker than the contact resistance of the breaker, so if the load is shorted, the triac is broken. So that the parts must be replaced.

In addition, in the case of the circuit breaker applied to the line, most of the circuit breakers are applied with the bimetallic thermal method, so that the breaking operation takes more than several seconds, so that the short-circuit current passes through the contacts during the breaking operation. .

In the case of a circuit breaker, if a line using a predetermined standard causes a short circuit, it is configured to cut off a short-circuit current even if a contact or other portion is damaged, thereby causing no immediate problem in appearance and operation. However, if it is used for a long period of time, the contact resistance of the contact causes the failure to supply the power to the micro load or the failure of the circuit breaker to carry out the shutdown operation in the normal state due to a lot of heat at the contact point. do.

That is, in the prior art, since the wiring circuit is configured so that the power source is directly supplied to the load regardless of the load when the switch for operating the power source is operated, the power source control device (Open) short-circuit failure, or a serious damage to the contact point on the line including the breaker, resulting in a burden imposed on the customer in the future.

It is an object of the present invention to provide a power control device that prevents breakage due to a short circuit due to a construction error when the power is first applied after construction and damage on a line contact.

The present invention also relates to a power control device for checking whether a short circuit or an overcurrent is present at the time of initial power supply and informing a warning according to a check result by a visual or audible method so that the power can be supplied to the connected sub- The purpose is to provide.

According to an aspect of the present invention, there is provided a power supply control apparatus including a first input contact, a second input contact, and an output contact, the AC power of the first input contact being connected to the output contact or the second input contact being connected to the output contact A load test circuit connected to the power supply relay and the second input contact for outputting a test detection signal capable of detecting abnormality of the load connected through the second input contact and the output contact of the power supply relay, And a control unit for controlling the switching from the second input contact of the power supply relay to the first input contact according to the test sense signal.

Also, the load test circuit of the power supply control device includes a resistor R0 connected to the second input contact, a resistor R1 connected to the resistor R0, and a transistor TR2 connected to the resistor R1 and having a collector terminal, and the control unit outputs a test signal Thereby causing the load test circuit to generate a test sense signal for detecting the abnormality of the load.

The load test circuit of the power supply control device further includes a transistor TR1 whose base end is connected between a resistor R0 and a resistor R1, a resistor R2 connected to a collector terminal of the transistor TR1, and a resistor R3 connected to the resistor R2, And the resistor R3 to the control unit.

Further, the control unit determines that the load is abnormal when the voltage is not detected from the test detection signal or is out of the designated range, and suspends the switching from the second input contact to the first input contact when the load is determined to be abnormal.

Further, the power supply control device further includes an alarm means connected to the control unit, and when the control unit determines that the load is abnormal, the alarm output means outputs a signal indicating the load abnormality to the alarm means, and the alarm means comprises one or more LEDs or a buzzer.

The power control apparatus according to the present invention has the effect of preventing breakage due to a short circuit due to a construction error when the power is first applied after the construction and damage to the contacts on the line.

Also, the power control apparatus according to the present invention as described above checks whether a short circuit or an overcurrent occurs when the power is first applied, and warns according to the check result through a visual or audible method. So that it can be used.

FIG. 1 is a flowchart illustrating a control process of the power control apparatus according to the present invention.
2 and 3 are diagrams showing an exemplary circuit configuration and operation structure of the power supply control device according to the present invention.
FIG. 4 is a flowchart showing a specific control process for power supply switching in the structural example shown in FIG. 2 and FIG. 3. FIG.
5 is a diagram showing a circuit configuration and an operation structure of a light switch, which is an embodiment of a power supply control device according to the present invention.
6 is a view showing an SMPS application power supply circuit of a light switch which is another embodiment of the power supply control device according to the present invention.
7 is a diagram showing the configuration and operation structure of a standby power cutoff switch or an outlet power supply circuit which is another embodiment of the power supply control device according to the present invention.

BRIEF DESCRIPTION OF THE DRAWINGS The above and other objects, features and advantages of the present invention will become more apparent from the following description taken in conjunction with the accompanying drawings, in which: FIG. It can be easily carried out. In the following description of the present invention, a detailed description of known technologies related to the present invention will be omitted when it is determined that the gist of the present invention may unnecessarily obscure the present invention. Hereinafter, preferred embodiments of the present invention will be described in detail with reference to the accompanying drawings.

FIG. 1 is a flowchart illustrating a control process of the power control apparatus according to the present invention. The power control apparatus according to the present invention has a load short detection function and is preferably usable for home use. 2 and 3 are views showing an exemplary circuit configuration and operation structure of the power supply control device according to the present invention.

Referring to these drawings, a power supply control apparatus according to the present invention is provided with a power supply relay 200 connecting a power supply source 10 for supplying power to a load 40 and a load 40.

The power supply control apparatus further includes a load test circuit 700 and a control unit 800. The power supply control apparatus includes a load test circuit 700 and a control unit 800. The current control unit 800 supplies current (or alternating current power) supplied from the power supply source 10 to the load 40, So that power can be supplied from the power supply source 10 depending on the result of the abnormality test of the power supply 10. That is, the control unit checks whether there is an abnormality in the load connected to the power supply control apparatus via the load test circuit, and turns on the power supply relay 200 when there is no abnormality as a result of the check, ) Is not turned on.

To this end, the power supply relay 200 has at least three contact points. One contact (hereinafter also referred to as a 'first input contact') is connected to an AC power supply (commercial or emergency power supply) provided in the power supply source 10 to receive AC power. The other contact (hereinafter also referred to as a second input contact) is connected to the load test circuit 700. Another contact (hereinafter also referred to as an 'output contact') is connected to the load 40 at the rear end of the power control device. Here, although the positions of the respective contact points are shown only in FIG. 2 and FIG. 5, the respective contact points can be discriminated extremely easily in the other drawings.

The power supply relay 200 connects the AC power of the first input contact to the output contact or connects the second input contact to the output contact according to a control signal output by the control unit. The power supply relay 200 is preferably a C-type relay that connects the load 40 terminal to the normally open output contact and connects the normally closed terminal (second input contact) to the load test circuit. The contact may be comprised or include a conductive metal material that may be located within the component case of the power supply relay 200 or external to the component case.

2 and 3, the load test circuit 700 is composed of a plurality of resistors and a plurality of transistors and is connected to the control unit 800 for the resistors and the transistors And outputs the generated test detection signal to the control unit 800. The control unit 800 generates a test signal based on the test signal. The load test circuit 700 outputs a test detection signal which is connected to the second input contact of the power supply relay 200 and detects abnormality of the load 40 connected through the second input contact and the output contact.

More specifically, the load test circuit 700 includes resistors R0, R1, R2, R3, transistors TR1 and TR2. One end of the resistor R0 is connected to the second input contact of the power supply relay 200. [ That is, one end of the resistor R0 is connected in series with the voltage supplied from one end of the power supply source 10 through the load and through the normally closed contact (second input contact) of the power supply relay 200.

The other end of the resistor R0 is connected to one end of the resistor R1 and the base end of the transistor TR1. The resistors R0 and R1 are connected in series and the base end of TR1 is connected between R0 and R1.

One end of the resistor R2 is connected to the collector terminal of the transistor TR1, one end of the resistor R3 is connected to the other end of the resistor R2, and the other end of the resistor R3 is connected to the ground. The resistor R2 and the resistor R3 are configured to divide the voltage appearing at the collector of TR1.

A transistor TR2 is connected to the other end of the resistor R1. The collector end of the transistor TR2 is connected to the other end of the resistor R1 and the emitter end of the transistor TR2 is connected to the ground.

The base of TR2 is connected to the control unit 800 and the test signal output from the control unit 800 is applied to the base of the TR2. When a test signal is given from the controller 800, a collector emitter of the transistor TR2 is turned on, and the other end of the resistor R1 is connected to the ground. Therefore, the load by the controller 800 due to the presence of the voltage between the resistors R2 and R3 It is possible to detect whether or not the abnormality of the sensor 40 is abnormal. The controller 800 can detect whether the load 40 is abnormal by using a test sense signal that is a signal between the resistors R2 and R3.

Specifically, when the test signal is applied from the control unit 800 to the base of the transistor TR2, when the resistor R1 is grounded and the load is normal or open, the transistor TR1 is turned on On.

When TR1 is turned on, the load test circuit 700 outputs a test sense signal through a signal between the resistors R2 and R3, and a detection input (test sense signal) connected to the controller 800 is output to the power source 10 The voltage applied at one end of the capacitor is divided.

However, when the load is short-circuited or overload exceeding the rated load is applied, the transistor TR1 is not turned on so that the control unit 800 can not detect the voltage or the detected voltage is out of the set value, Is detected.

In addition, the control unit 800 confirms whether the current waveform according to the load detection is normal and the normal state is confirmed. When there is a product operation request for operating the load 40, ) Signal, so that the power supply is performed so that the operation can be normally performed.

If the voltage is not detected from the test detection signal or the detected voltage is out of the setting range, the control unit 800 determines that the load is abnormal. When the load is determined to be equal to or greater than the load, switching from the second input contact to the first input contact is suspended and the power supply relay 200 is opened.

FIG. 4 is a flowchart showing a specific control process for power supply switching in the structural example shown in FIG. 2 and FIG. 3. FIG. Hereinafter, specific features of the power control apparatus of the present invention will be described with reference to FIGS. 2 to 4. FIG.

Referring to these drawings, a power supply control apparatus according to the present invention is characterized in that a commercial power input terminal 14 and an emergency power input terminal 12 for supplying power to a load 40 are connected to an emergency switching relay 100, A power supply source 10 is provided to receive a voltage from the emergency power supply and to supply power to the load 40 through the power output stage 30. [

The power supply control device includes a power supply relay 200 for allowing a power supplied to the load 40 to pass through the load test circuit 700 between the emergency switching relay 100 and the load 40, Circuit 700 shown in FIG.

The power supply relay 200 is configured to allow the power supplied to the load 40 to be supplied after the abnormality is confirmed via the load test circuit 700. The power supply relay 200 is connected to the output terminal of the emergency relay 100, It is installed to connect in open form. That is, the second input contact of the power supply relay 200 is connected to the output contact (normally open) when the AC power is not supplied to the power supply control device or when the product is first distributed after the production of the product.

In other words, the power supply relay 200 does not directly connect the commercial power supply and the load during the initial wiring work so that the power supply can be performed after the load test through the load test circuit 700 even during the initial power supply after completion of the wiring work do.

A first voltage regulating part 320 and a first rectifying part 340 are provided between the emergency switching relay 100 and the load 40. The first voltage regulating part 320 and the first rectifying part 340 are provided between the emergency switching relay 100 and the load 40, 2 voltage regulating unit 360 and a second rectifying unit 380 are further provided.

The voltage of the voltage regulator 320 or 360 is output as a DC voltage through the rectifier 340 or the voltage regulator 360. The voltage of the first rectifier 340, And the direct current voltage output through the second rectifying unit 380 is supplied to the emergency switching relay 100 through the smoothing unit and the operation voltage for driving the load test circuit 700. [ As shown in Fig.

Meanwhile, the load test circuit 700 driven using the converted operating voltage as described above checks the connection state between the load 40 and the power source by generating a test sense signal for the load test to check the voltage, And a control unit 800 for switching the power supply relay 200 to supply power to the load 40. [

In detail, the load test circuit 700 is designed to detect whether the load 40 is overloaded or short-circuited by the resistance value of the load 40 when the test signal is applied.

That is, when the voltage of the P2 stage is applied to the normally closed contact (second input contact) serving as the detecting unit through the load 40 via the load 40, when the load is normal or open, And the detection input (test detection signal) appears as a ripple voltage at the input terminal connected to the control unit 800 between R2 and R3. At this time, in order to use the current used for the load test only when necessary, the detection operation is performed only during the signal generated in the control unit 800. [

On the other hand, if the load 40 is short-circuited or an overload exceeding the rated load is applied to the P2 stage, no voltage appears at the input terminal connected to the controller 800 between R2 and R3.

When the normal state is confirmed by the detection operation as described above, the normal routine of the conventional automatic switching device is performed. When the abnormality is detected, the power supply relay 200 is opened and the first notification means (420) and the second notification means (440).

In addition, a commercial power sensing unit for checking the supply state of the commercial power is provided at one side of the commercial power input terminal 14. The commercial power sensing unit includes a first optocoupler 50 including an LED and a phototransistor. When the LED is turned on, the phototransistor is turned on to transmit the signal.

The commercial power sensing unit configured as described above senses when the commercial power is supplied or cut off, and transmits the sensed result to the controller 800. [

In addition, a DC power source for driving the emergency switching relay 100 is obtained at one side of the control unit 800 using an output rectified at the rear end of the emergency power source input line, and a second optocoupler 60 And an emergency power supply drive control circuit including the emergency power supply drive control circuit.

In addition, in the control unit 800, the DC power obtained through the emergency power supply input line passes through the second optocoupler 60, so that when the commercial power supply and the emergency power supply are simultaneously applied, priority control can be performed through the control unit 800 .

That is, the first notification means 52 and the second notification means 62 can be controlled to receive a control signal from the control unit 800 and individually inform the user of the status of the power source, and the first notification means 420 And the second annunciator 440 operate together to inform the load test circuit 700 that an overcurrent flows or an abnormal state including a short circuit is detected.

The first and second notifying means 420 and 440 having such functions can be configured by a combination of an LED or a buzzer or an LED and a buzzer to inform the user of the operation state of the automatic switching system, which is one embodiment of the present invention.

Meanwhile, in the power control apparatus according to the present invention, the power supply relay 200 is composed of a C type relay. That is, in the present invention, the latch relay can be used to make the product open in a normally open state when the product is shipped, or when the power is supplied by connecting the load side to the normally open contact, The relay contact is connected so that an abnormality can be detected through the relay 700.

In detail, the power supply relay 200 provided between the emergency switching relay 100 and the load 40 is connected to the load side in the normally open state, and is connected to the load side through the load test circuit 700, .

The pulsating current source supplied through the normally closed contact (second input contact) of the power supply relay 200 through the load 40 checks the voltage during the detection signal (test signal) generated by the control unit 800 The control unit 800 performs the detection function only with the first voltage regulator 320 without adding a separate power supply circuit.

Meanwhile, in the control unit 800, the state of change of the voltage is determined by software in consideration of the resistance load including the capacitive load or the inductive load, and it is determined whether the voltage is normal or not.

If the normal state is confirmed as a result of the comparison of the instantaneous voltage values, the control unit 800 waits for the next operation, and performs the next operation when the execution command is input.

That is, in the case of the power control apparatus according to the above-described embodiment, the state of the power source is checked to determine the type of the power source, and after the appropriate operation is performed by the emergency switching relay 100, a switching signal is outputted to the power supply relay 200 So that power can be supplied to the load 40.

On the other hand, in the case where the pulsating potential, which is a normal condition, is not detected, the control unit 800 does not switch the power supply relay 200 (suspends switching) and uses the first notification means 420 and the second notification means 440 Thereby informing the abnormal power supply state.

Accordingly, the user can confirm the abnormality of the power supply circuit by checking the display information of the first notifying means 420 and the second notifying means 440 as described above, And damage to the contacts of circuit breakers or the like on the same line can be prevented.

FIG. 5 is a diagram showing a circuit configuration and an operation structure of a light switch, which is an embodiment of the power control device according to the present invention. FIG. 6 is a block diagram of a power switch control device according to another embodiment of the present invention, 7 is a diagram showing a configuration and an operation structure of a standby power cutoff switch or an outlet power supply circuit which is another embodiment of the power supply control device according to the present invention. As can be seen from FIGS. 2 to 7, the power control apparatus according to the present invention is usable for home use and has a load short detection function.

More specifically, the power control apparatus according to the present invention includes a power supply relay 200, a load test circuit 700, and a control unit 800 between a power supply source 10 and a load 40 , And may be configured to be connected to the light switch circuit as shown in Fig. FIG. 5 shows an embodiment for controlling a lamp, and FIG. 6 shows a case in which an SMPS power supply device 16 is used as a circuit configuration for controlling a lamp as shown in FIG.

5 and 6 are different from each other in the power supply control method connected to the AC power source 10 as the power supply source 10, so that the description of the embodiment shown in FIG. 6 will be omitted, 5, the current flowing through the power supply source 10 is supplied through the power supply of the trans-free capacitor current limit system.

The power supplied from the power source of the trans-free capacitor current limit system to the lamps of each load 40 is supplied to the power supply relay 200 via the load test circuit 700 in the same manner as in the above embodiment, Checked.

That is, the power supplied to each of the lamps is checked for the pulsating current voltage through the load test circuit 700, and when the check result is confirmed as a normal state through the controller 800, the power supply relay 200 is switched, Is available.

In the above state, when the user operates a light switch (not shown) for controlling the light, the electric lamp connected to the light switch may be turned on or off.

In addition, when the normal pulsating voltage is not confirmed in the load test circuit 700, the controller 800 informs the user of the abnormal state through the notifying means 400. As a result, the user checks the abnormal state, .

7 is a diagram showing a configuration and operation structure of a standby power cutoff switch or an outlet power supply circuit which is another embodiment of the power control device according to the present invention. A current transformer (CT) 19 is further provided to check the power supply and cut off standby power.

6, the SMPS power supply unit 16 is connected to the power supply source 10 to be converted into a DC voltage, and DC power supplied to the load 40 is supplied to the power supply relay 200 Is checked by the load test circuit 700 for the normal state.

That is, whether or not the power supplied to control the operation of the load 40 according to the socket outlet or the switching operation is checked through the load test circuit 700 to check whether the power supply is in a normal state, So that power can be supplied to the load (40).

As a result, in the present invention, the load current is checked via the load test circuit 700 before the power is supplied to the load 40, and then, through the check value, And controls the power supply relay 200 through the control unit 800 according to a result of the check, so that power can be supplied, so that the present invention can be easily applied to various embodiments.

In addition, in the present invention, the controller 800 first disconnects the power supply relay 200 when the supplied power is cut off. That is, according to one embodiment of the present invention, when the power supply relay 200 is formed as a latch relay, the control unit 800 outputs a reset signal so as to switch to the normally open state.

In addition, in the present invention, the power supply relay 200 is energized only while a control signal is transmitted by applying a latch relay, thereby reducing current consumption.

When the power supply relay 200 is switched to the normally open state as described above, the power supply to be resumed is again supplied with power to the load 40 after the normal state is confirmed through the load test circuit 700 Stable power control can be achieved.

It will be apparent to those skilled in the art that various modifications and variations can be made in the present invention without departing from the spirit or scope of the inventive concept as defined by the appended claims. The present invention is not limited to the drawings.

100: Emergency relay 200: Power supply relay
320: first voltage regulator 340: first rectifier
360: second voltage regulator 380: second rectifier
400: notification means 700: load test circuit
800:

Claims

1. A power supply control device for supplying an emergency power supply to a connected load when a commercial power supply is cut off,
An emergency change relay connected to a commercial power input terminal and an emergency power input terminal to output an AC power from a commercial power input terminal and output an AC power from an emergency power input terminal when AC power from a commercial power input terminal is cut off;
A first input contact connected to the alternating current power output from the emergency switching relay, a second input contact and an output contact connected to the load, and connecting the AC power of the emergency switching relay of the first input contact to the output contact, A power supply relay for connecting an input contact to an output contact, the power supply relay having the second input contact connected to the output contact before the AC power is supplied through the emergency transfer relay;
A load test circuit connected to the second input contact and outputting a test detection signal capable of detecting abnormality of a load connected through the second input contact and the output contact of the power supply relay; And
And a control unit for controlling switching from the second input contact of the power supply relay to the first input contact to supply AC power from the emergency transfer relay in accordance with the test detection signal output from the load test circuit &Lt; / RTI &
The emergency switching relay outputs a pair of AC power from a commercial power input terminal or an emergency power input terminal,
Wherein the first input contact of the power supply relay is connected to one AC power supply of a pair of AC power supplies output from the emergency switching relay and the other AC power output from the emergency switching relay is output to a load,
Power control device.

The method according to claim 1,
The load test circuit includes a resistor R0 connected to the second input contact, a resistor R1 connected to the resistor R0, a transistor TR2 connected to the resistor R1, a transistor TR1 connected between the resistor R0 and the resistor R1, A resistor R2 connected to the collector terminal of the transistor TR1 and a resistor R3 connected to the resistor R2,
The control unit outputs a test signal to the base end of the transistor TR2 to cause the load test circuit to generate a test sense signal for detecting an abnormality of the load,
The load test circuit outputs a test sense signal between the resistor R2 and the resistor R3 to the control unit.
Power control device.

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3. The method of claim 2,
Wherein the control unit determines that the load is abnormal when the voltage is not detected from the test detection signal or is out of the designated range, and suspends the switching from the second input contact to the first input contact when the load is determined to be abnormal.
Power control device.

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