KR100939233B1 - The power distribution board with Auxiliary Power Unit - Google Patents

Abstract

The present invention relates to a distribution panel that prevents the occurrence of fire or breakage of the electrical load by interrupting the power supply in the event of a short circuit or an overload while receiving and supplying commercial power supplied from the outside to distribute power to each load. It relates to a distribution panel installed inside the auxiliary power unit for supplying emergency power in the case of disconnection.

The present invention is a distribution panel consisting of a circuit breaker and a plurality of circuit breakers connected by the circuit breaker and the busbar to block the flow of electricity in the event of an overcurrent or a short circuit, the commercial power and emergency power in the distribution panel It relates to a power distribution panel with a built-in auxiliary power device, characterized in that it further comprises an auxiliary power unit for automatically switching and the installation panel that the auxiliary power unit and the earth leakage breaker is detachably mounted.

In the internal electronic circuit of the auxiliary power unit of the present invention, a latch circuit for switching a relay is configured, and when the commercial power is restored in a power failure state, the zero point is detected from the input waveform of the commercial voltage and the relay is in that state. It is configured to use a zero crossing control scheme so that it can be switched.

Through the present invention, it is possible to configure a distribution panel that can be equipped with a circuit breaker and the auxiliary power device quickly to improve the efficiency and productivity of the work, the auxiliary power device to configure the relay latch circuit to prevent the current consumed in the relay The life span of the relay can be increased, and a control unit that has a zero crossing control function is configured to detect a signal at the zero point of the AC voltage input at the return of the commercial power supply in case of a power failure or the like. The contact of the relay to be switched in, minimizing the excessive force when driving the relay contact, can increase the drive life of the relay, and has the effect of minimizing the loss by reducing the occurrence of arcing due to switching.

Distribution board, auxiliary power unit, latch circuit, zero crossing, installation panel

Description

Power distribution board with auxiliary power unit {The power distribution board with Auxiliary Power Unit}

The present invention relates to a distribution panel that prevents the occurrence of fire or breakage of the electrical load by interrupting the power supply in the event of a short circuit or an overload while receiving and supplying commercial power supplied from the outside to distribute power to each load. It relates to a distribution panel installed inside the auxiliary power unit for supplying emergency power in the case of disconnection.

Currently, in buildings such as apartments and officetels, distribution boards are installed to supply commercial power to the load, and when the commercial power is cut off, emergency power is supplied to supply power to the emergency load.

Distribution boards are usually equipped with a circuit breaker (MCCB) and an earth leakage breaker (ELCB). Each breaker has two inputs and two outputs. In the case of the wire type, it has three input terminals and three output terminals in the R, T, and S phases.

The circuit breaker is used as a circuit breaker for overload and overcurrent protection, and the circuit breaker is used as a circuit breaker for short circuit, overload and overcurrent protection.

When these circuit breakers are configured in the distribution panel, wiring breakers are generally used as main circuit breakers according to electrical design standards, and circuit breakers are configured as branch circuit breakers.

The commercial power is a power supplied from the power line into the building and supplied to each household. The emergency power is a power source supplied when the commercial power is interrupted by a power failure or by cutting the power line. Means the power supplied by the facility.

At present, buildings such as apartments and officetels provide emergency power to each household when commercial power is cut off so that the lights can be lit by turning on emergency lights. In particular, in case of officetel, emergency power must be supplied to turn on emergency light when commercial power is cut off by fire.

Such emergency power supplies power to emergency loads of equipment, such as refrigerators, emergency lights, door locks, boilers, and telephones, which must be operated even in the event of a power failure.

However, since the line to which emergency power is supplied is configured separately from the existing generation panel, the commercial power is supplied only to the commercial load through the breaker of the generation panel, and the emergency power is separately supplied between the households to the unit household emergency load. Power is used.

In order to solve this problem, Patent Publication No. 10-2005-0055183 proposes a power supply automatic switching device, but there is no specific configuration for the case of installation in the distribution panel of such a power supply automatic switching device.

1 is an electronic circuit diagram of an automatic power supply switching apparatus according to the prior art, wherein three relay switches 10, 20, and 30 are configured as shown, but the relay switch has a contact point of a closed relay when power supply is cut off. Since it is opened again, power must be supplied continuously, and thus the relay is overheated during continuous driving, resulting in damage or malfunction or increased power consumption.

In addition, when commercial power is applied again after emergency power is input, when commercial power, which is an AC power source having a sine wave, is randomly input, when starting inrush current of 1.5 times or more of the used power occurs and a normal relay contact is closed Likewise, a considerable load is applied to the contacts of the relay, and when the open / close operation is repeated in this state, there is a problem in that the life of the relay is reduced by 1/2 or 1/3 of the reference life.

In order to solve the above problems, an object of the present invention is to provide a distribution panel having a structure that is easy to install the auxiliary power unit.

In addition, the present invention configures the control unit so that the relay can be switched at the optimum zero point of the AC voltage input to the auxiliary power unit, the auxiliary power by the AC input waveform when the commercial power source of the AC power is randomly input The purpose is to minimize the lifespan of the relay of the device.

In addition, the switching driving method of the relay switching between the commercial power supply and the emergency power supply is configured by the latch circuit to maintain the switching state by a single pulse wave to prevent current consumption.

In order to achieve the above object, in the distribution panel consisting of a circuit breaker and a plurality of circuit breakers connected by the circuit breaker and the busbar to block the flow of electricity in the event of an overcurrent or a short circuit, the commercially available inside the distribution panel An auxiliary power unit for automatically switching power and emergency power; And a binding portion protruding forward and bent up and down in the center and a hinged clip portion are formed at the upper and lower portions so that the auxiliary power device and the earth leakage breaker are detachably mounted, and one end of the auxiliary power device and the earth leakage breaker are formed. Insertion is fixed to the binding portion and the other end is installed panel configured to be fixed to rotate the clip portion; proposes a distribution panel with a built-in auxiliary power device comprising a.
Protruding pieces may be formed at both ends of the auxiliary power device and the earth leakage breaker to be fixed by the binding part and the clip part.
The auxiliary power unit includes a detection unit for detecting an AC voltage signal from the commercial power source; A controller to which a signal output from the detector is applied; A relay driver for driving a relay by receiving a signal generated from the controller; And a relay configured to automatically switch between commercial power and emergency power by switching contacts according to the signal by the relay driver. Electronic circuits including can be configured.
The relay driver may include a relay latch circuit such that after the contact of the relay is switched according to the pulse signal generated by the controller, the contact state of the relay is maintained until the next pulse signal is generated by the controller.
The control unit may be configured to have a zero crossing control function for detecting a zero point in the detection signal of the detector so that the relay contact is switched at the zero point of the commercial AC voltage when the commercial power is interrupted and then returned again.
The auxiliary power unit may further include a light emitting diode displaying a supply state of commercial power, and further comprising a light emitting diode displaying a supply state of the emergency power.

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According to the distribution panel in which the auxiliary power unit of the present invention is built, the following effects can be obtained.

First, it is possible to construct a distribution panel that can be equipped with a breaker and auxiliary power device quickly through the installation panel, improving work efficiency and productivity, and reducing cost by preventing breakage of the circuit breaker and distribution box base caused by screwing. Will be able to.

Secondly, after the relay contact switches the commercial power source and the emergency power source according to the single pulse signal generated from the control unit to switch the commercial power source and the emergency power source to each other, the control unit generates a single pulse signal until the next single pulse signal is generated and inputted. By configuring the relay latch circuit to maintain the contact state can prevent the current consumed in the relay can increase the life of the relay.

Third, the auxiliary power unit is provided with a control unit which performs a zero crossing control function. In case of power failure, the auxiliary power unit detects a signal at the zero point of the waveform of the AC voltage input at the return of the commercial power supply, and at the optimum zero point of the AC voltage. The relay contacts can be switched, minimizing the force when the relay contacts are driven, so that the node life of the relay can be increased to about 1.5 times, and the loss can be minimized by reducing the arcing caused by the switching.

With reference to the accompanying drawings will be described in detail with respect to the distribution panel with a built-in auxiliary power device, the distribution panel is an example of a distribution panel equipped with a single-phase three-wire or single-phase two-wire earth leakage breaker, which is the most common distribution method of the converter most commonly used for home use Explain.

2 is an exploded perspective view of a distribution panel equipped with an auxiliary power device, as shown in the circuit breaker 130 and the circuit breaker 130 to block the flow of electricity when an overcurrent or an electric leakage occurs in the distribution panel 100 used in the present invention. A plurality of earth leakage breakers 150 connected by the circuit breaker 130 and the busbars 140 are mounted. The front panel of the distribution panel is configured with a distribution panel cover for opening and closing the distribution panel (not shown).

In detail, the configuration of the distribution panel 100 is the installation panel 120 is mounted in the inner space of the distribution box base 110, the installation panel 120 is a circuit breaker 130, a circuit breaker for supplying power in the outdoors ( 130) and a plurality of earth leakage breakers 150 connected by the busbar 140, an auxiliary power device 160 for automatically switching between emergency power and commercial power, and an emergency power circuit breaker connected with the auxiliary power device 160. 170 is mounted and configured.

3 is a cross-sectional view showing a fastening structure of the circuit breaker and the auxiliary power unit mounted on the installation panel according to the present invention.

Although illustrated as an example the earth leakage breaker 150 mounted on the installation panel 120, it can be equally applied to the auxiliary power unit 160 or the emergency power circuit breaker 170.

The mounting structure of the pedestal 121 of the installation panel 120 may be preferably formed of a non-screw detachable structure, not a screw type structure, and a binding portion protruded forward and bent upward and downward in the center of the pedestal 121. 121a is formed, and hinged clip portions 121b are formed on upper and lower portions of the pedestal 121. A hinge portion 121c for hinge coupling the clip portion 121b is formed at a position spaced apart from the binding portion 121a by a length of the breaker 150 or the auxiliary power device 160. The hinge portion 121c may be configured as a pair of hinge shafts 121c 'spaced apart from each other so that both ends of the clip portion 121b can be inserted therein.

One end of the auxiliary power unit 160 and the breaker (150, 170) is inserted and fixed to the binding portion (121a), the other end is fixed by rotating the clip portion (121b), the breaker 150, 170 and protruding pieces 153 are formed at both ends of the auxiliary power unit 160 to be fixed by the binding part 121a and the clip part 121b.

The clip portion 121b hinged to the hinge portion 121c in a state in which protrusions 153 formed at both ends of the breaker 150 and the auxiliary power unit are inserted into the binding portion 121a and the hinge portion 121c, respectively. By rotating the circuit breaker 150, 170 and the auxiliary power unit 160 to be firmly fastened, a plurality of earth leakage breakers 150 and emergency power breaker 170 and auxiliary power unit 160 quickly It is possible to configure the distribution panel 100 that can be mounted to improve the efficiency and productivity of the work, it is possible to reduce the cost by preventing the breaker breaker and the distribution box base damage due to the screwing.

4 is a connection configuration diagram of the auxiliary power device, the commercial power is input through the commercial power supply unit 160a through the earth leakage breaker 150, the emergency power is supplied to the emergency power supply unit 160b through the emergency power exclusive circuit breaker 170. It is configured to be input to the auxiliary power unit 160 through.

The commercial power and emergency power input as described above are output through the output unit 160c and are configured to be connected to the load.

A more detailed configuration thereof will be described with reference to FIG. 5. FIG. 5 is an electronic circuit diagram illustrating an internal circuit configuration of an auxiliary power device. As illustrated, commercial power and emergency power are input / output through the auxiliary power device. do.

The illustrated electronic circuit diagram includes a commercial power supply unit 160a to which commercial power is supplied, an emergency power unit 160b to supply emergency power when the commercial power is cut off, an output unit 160c to output the commercial power and emergency power, and the commercial power supply. A detector 160d for detecting an input signal of a power source, a controller 160e for generating a pulse signal according to a signal applied from the detector 160d, a relay driver 160f for driving a relay according to the pulse signal of the controller, and It consists of a pair of relays (160g) having a contact point that is switched with the terminal of the emergency power and commercial power.

First, the operation state of the electronic circuit of the auxiliary power unit when the commercial power is cut off due to power outage or cutting of the transmission line is as follows.

As shown in FIG. 5, the commercial power supply unit 160a includes configurations of a rectifier and a zener diode to prevent overcurrent, and detailed description thereof will be omitted since it is commonly used in the art. Shall be.

6 shows an operation state of the electronic circuit of the auxiliary power unit when the supply of commercial power is cut off.

As shown, when the commercial power is input, the waveform of the commercial voltage is detected by the detector 160d (6a), and the waveform of the voltage of the commercial power in the rectifier is changed in the process of shutting off the commercial power due to a power failure. When the change occurs (6d), the detection unit 160d detects this change as a signal (6b, 6c), and when the signal of the detection unit 160d is applied to the control unit 160e configured with the PIC controller, the PIC controller generates a single pulse wave. 6e, the relay drive unit is driven to switch the contact point of the relay so that the emergency power unit and the output unit 160c are connected (6f), and the emergency power is supplied and output (6g).

That is, when the process of shutting off the commercial power is detected by the detection unit, the emergency power is input in the process, and the switching operation is configured such that the emergency power is cut off in the process of returning the commercial power, so that the power supply is actually supplied to the load. The phenomenon does not appear.

6 shows the output voltage waveform 6g of the emergency power in the case where the relay is switched (6f) at the zero point of the input waveform of the emergency alternate voltage. The zero crossing control method upon return will be described later.

The waveform shown in FIG. 7 represents a waveform representing an operating state when the commercial power source is restored and input again.

When the input voltage of the AC voltage is detected by the detection unit 160d at the time of return of the commercial power (7a, 7b, 7c), and the commercial power supply voltage is supplied again by the rectifier of the commercial power supply unit 160a (7d). The detection signal is applied to the PIC controller of the controller 160e, and the PIC controller generates a single pulse wave (7f), drives the relay driver 160f to connect the contacts of the relay 160g to the commercial power supply unit and the output unit 160c. Is switched to be connected (7g) and the commercial power is supplied again and output (7h).

In the electronic circuit of the auxiliary power unit of the present invention, a relay circuit is configured in the relay driver 160f for switching the relay contacts.

The latch circuit is a type of memory device, and when data is inputted, the latch circuit stores the data and outputs the data stored at the same time as the next data is input. In the case of general relay, for example, two data input terminals are composed, and the relay in contact a gives the desired signal and switches to contact b, then returns to contact a when the power goes out. In case of latch circuit, there is a memory function. If it is in contact b, it will memorize the state before power is off and on again.

In the case of the control unit 160e of the present invention, after the power failure state signal is detected by the detection unit 160d, a pulse wave 5V voltage of 0.2 seconds is generated at # 5 of the PIC controller so that the closed circuit between the 12V relay driver 160f and the relay 160g is closed. It is formed to operate the relay in the emergency power supply state by switching the relay.

In addition, a pulse wave 5V voltage of 0.2 seconds is generated at # 5 of the PIC controller after a power failure return signal is detected, and a closed circuit is formed between the 12V relay driver 160f and the relay 160g to switch the relay to the power failure recovery state. Will be reduced.

In this case, since the relay driver 160f uses a latch circuit, the relay is switched by a single 0.2 second pulse wave output from the controller in the blackout state or the blackout state, and thereafter, the relay is operated until the pulse wave is generated again. Does not go back to its original state.

The PIC controller of the illustrated controller 160e is composed of eight pins. For example, when a detection signal is applied to pin 3 of the PIC controller by the detector 160d during power failure, a pulse wave of 5V is applied to pin 5 about 0.2V. After a second, the relay switches and stays closed until the next signal is input again.

In detail, when the CUP detection wave is applied to the PIC controller of the controller 160e by the signal as shown in FIG. 6c due to a power failure or the like (6c), the PIC controller of the controller 160e generates a 5V implementation wave. It generates a single pulse to switch the relay contact through the relay drive unit 160f to make the contact of the relay is in contact with the input terminal of the emergency power.

Since the latch circuit maintains the state until the next signal is applied, the emergency power is maintained until the contact point of the relay is maintained until commercial power is supplied again.

In addition, when the commercial power supply is restored, the PIC controller generates a pulse signal again and maintains the state until the next signal is input after the relay contact is switched by the latch circuit.

However, the input time or condition of the pulse signal generated by the controller, the intensity of the pulse, and the like can be freely set within a range that can be changed by those skilled in the related art, and the latch circuit configured in the relay driver may also be an embodiment of the present invention. The present invention is not limited thereto, and any modifications can be made to those skilled in the art.

Another feature of the present invention is that the control unit of the auxiliary power unit is driven in a zero crossing control method when the commercial power is resupplyed due to the return of the power failure state.

In the zero crossing control method, the moment when the sinusoidal wave voltage of the sinusoidal waveform of the AC voltage passes 0V appears every cycle. This point is called a zero cross point.

When the switching operation of the relay is randomly turned on and off, the AC current is suddenly turned on and off, causing strong noise to the surrounding electronic circuits. Therefore, in order to prevent this, if there is no sudden change of the current, that is, the control to be on, off when the voltage becomes 0V position, there is no sudden change of the current and stable control is possible without the occurrence of noise due to transient.

To this end, the zero point point of the AC voltage is detected to control the point of contact of the switching element, which is called a zero crossing control method.

Referring to FIG. 7, a zero crossing control operation of the controller is illustrated.

When the AC voltage is detected by the detector at the return of the commercial power, the controller performs zero crossing control to detect the zero point of the AC voltage by the detector 160d (7e), and applies the detection signal accordingly to the PIC controller. In this way, when the zero point detection signal is applied, the PIC controller generates a single pulse wave that is a 5V square wave at the zero point of the waveform of the AC input voltage, and eventually the relay is switched at the zero point of the sine wave of the commercial voltage returned. The commercial power supply is configured to be returned and output (7h).

That is, when the return signal of the commercial power source is applied from the detection unit 160d (7c), the PIC controller of the control unit 160e is set to zero so that the commercial power source is restored while the relay contact is switched at the zero point of the input voltage waveform of the commercial power source. Crossing control is performed.

In detail, the AC voltages 220V and 60hz input to the detection unit detect a zero point at 10 scans per unit hertz, that is, 10 scan / hz, and then generate a pulse wave of 5V so that the relay is switched. In this case, it is preferable to accurately detect the zero point of the AC voltage, but it can be configured to switch within an error range of about 20%.

In addition, in the case of the auxiliary power unit 160, when the commercial power is supplied, the control unit 160e is configured to further include a light emitting diode (160e ') indicating the supply state of the commercial power, it is provided that the commercial power is supplied. It has a function to make it recognizable.

In addition, the emergency power unit 160b is configured to further include a light emitting diode 160b 'connected between the emergency power input terminals to display an emergency power supply state, so that the emergency power is recognized. Do it.

It will be obvious to those skilled in the art that the positions at which the light emitting diodes 160e 'and 160b' are mounted may be changed on a supply line of commercial power and emergency power.

In the detailed description of the present invention, specific embodiments have been described. However, it will be apparent to those skilled in the art that various modifications can be made without departing from the scope of the present invention.

1 is an electronic circuit diagram of a power supply automatic switching device according to the prior art.

2 is an exploded perspective view of a distribution panel equipped with an auxiliary power unit.

3 is a cross-sectional view showing a fastening structure of the circuit breaker and the auxiliary power unit mounted on the installation panel according to the present invention.

4 is a connection configuration diagram of the auxiliary power unit mounted on the distribution panel.

5 is an electronic circuit diagram showing the internal circuit configuration of the auxiliary power unit.

6 is a waveform diagram illustrating an operating state of an electronic circuit of the auxiliary power unit when the commercial power source is cut off.

7 is a waveform diagram showing an operating state of the electronic circuit of the auxiliary power unit when the commercial power source is restored again.

* Explanation of symbols for main parts of the drawings

100: distribution board 110: distribution box base

120: mounting panel 121: stand

121a: fastener 121b: clip

121c: hinge

130: wiring breaker 140: busbar

150: earth leakage breaker 153: protrusion

160: auxiliary power unit

160a: commercial power unit 160b: emergency power unit

160c: output unit 160d: detection unit

160e: control unit 160f: relay drive unit

160g: relay 170: circuit breaker for emergency power generation

Claims (8)

In the distribution panel composed of a circuit breaker and a plurality of circuit breakers connected by the circuit breaker and the busbar to block the flow of electricity in the event of an overcurrent or a short circuit, An auxiliary power unit for automatically switching the commercial power and emergency power inside the distribution panel; And In order to be detachably mounted to the auxiliary power unit and the earth leakage breaker, a binding portion protruding forward and bent upward and downward is formed at the center thereof, and a clip part hingedly coupled to the upper and lower portions is formed, and one end of the auxiliary power device and the earth leakage breaker are The panel is inserted and fixed to the binding portion and the other end is installed panel configured to be fixed by rotating the clip portion. The method of claim 1, Both ends of the auxiliary power unit and the earth leakage breaker is a power distribution panel with a built-in auxiliary power unit, characterized in that the projecting piece is formed to be fixed by the binding portion and the clip portion. The method of claim 1, The auxiliary power unit includes a detection unit for detecting an AC voltage signal from the commercial power source; A controller to which a signal output from the detector is applied; A relay driver for driving a relay by receiving a signal generated from the controller; And a relay configured to automatically switch between commercial power and emergency power by switching contacts according to the signal by the relay driver. Distribution panel with a built-in auxiliary power device, characterized in that the electronic circuit is configured to include. The method of claim 3, wherein The relay driver may be configured to have a relay latch circuit configured to maintain the contact state of the relay as it is until the next pulse signal is generated by the control unit after switching the contact point of the relay according to the pulse signal generated by the control unit. Distribution board with built-in power unit. The method of claim 3, wherein The control unit is configured to have a zero-crossing control function for detecting a zero point in the detection signal of the detector to switch the relay contact point at the zero point of the commercial AC voltage when the commercial power source is shut off again. Built-in distribution panel. The method of claim 3, wherein And the auxiliary power unit further comprises a light emitting diode displaying a supply state of commercial power. The method of claim 3, wherein And the auxiliary power unit further comprises a light emitting diode displaying a supply state of the emergency power. delete

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