KR102467245B1 - Power saving apparatus - Google Patents

Abstract

The present invention is to provide a power saving apparatus, which can keep an output voltage constant even when an input voltage is changed, thereby reducing power consumption. The power saving apparatus improves load performance and lifespan by adjusting supplied power of three phases R, S, and T to stable power by a mutual induction action of a toroidal core and supplying the stable power to a load side, thereby reducing power consumption. In particular, the toroidal core on which primary and secondary coils are wound is safely and firmly fixed using a shelf inside a case, and the heat generated in the toroidal core is easily discharged to the outside so as to prevent the temperature rise of the apparatus.

Description

Power saving apparatus {Power saving apparatus}

The present invention is a power saving device that can save power by maintaining the output voltage constant even when the input voltage changes. It relates to a power saving device that can stably supply power to businesses such as restaurants or street lights.

In general, a power saving device is a device that reduces the amount of electrical energy used by an electrical device while performing the same work. There are three ways to reduce the amount of electricity used while performing the same work. This is possible by improving one of the elements constituting power.

That is, P (power) = V (voltage) * I (current) * COSθ (power factor) It is common to adopt a method of reducing voltage or current or increasing power factor among these three methods.

Among them, a power saving device that reduces the power of the entire distribution line by increasing the power factor has recently been disclosed. In general, the power factor indicates the ratio between active power and apparent power in an AC circuit.

Normally, in a DC circuit, the product of voltage and current is power, but in an AC circuit, the product of the effective value of current and voltage is not necessarily power. In an AC circuit, the product of voltage and current is called apparent power, and power is obtained only when it is multiplied by the power factor. This is because the voltage or current of an AC circuit fluctuates in a sinusoidal (sine wave) shape, and the phases of both sinusoidal waves do not necessarily match in some cases.

Conventional AC power control and conversion devices include linear voltage conversion devices such as single-turn and double-turn transformers or reactors, and power control devices by phase control or PWM control using switching semiconductor devices. The transformer-type power control device is too bulky and heavy, so its practicality is low, and the power control device of the switching control method by electronic circuit has poor durability, reliability, and economic feasibility, and EMI that harms the surrounding electrical environment is a problem. has come to the fore

Among the conventional linear control methods, the British patent (GB2043971A) “constant voltage control device” is based on the primary coil polarity reversal switching method, and detailed constant voltage control is impossible. All of the secondary coils connected in series to are changed into circuit resistance and can cause overheating due to heat loss.

In addition, if the primary side coil circuit switch is closed and a closed circuit is made so that the load current flows through the secondary side coil, the current induced in the primary side coil generates heat due to its own loss and power loss increases. Moreover, with this control method, a counter-electromotive voltage occurs at the moment of switching and a transient phenomenon occurs, and when the load is an electronic product (COMPUTER, AUDIO TV, etc.), considerable electromagnetic noise is provided to the load side, so electric circuits such as motors and heaters For electronic products, which are load conditions other than the load, there are restrictions on use, and there is a case of power outage due to a sudden power change during bypass, which has a great influence on the load.

Republic of Korea Patent Application No. 10-2016-0013406

The present invention is a switching control by a conventional electronic circuit that has problems with the conventional transformer-type power control device, which is too large in volume and weight and has low practicality, poor durability, reliability, and economy, and generates EMI that hinders the surrounding electrical environment. The purpose is to solve the problem of the power control device of the method, and provides a power saving device that can reduce power consumption by stably adjusting the 3-phase power supplied from the KEPCO side through the toroidal core and supplying it to the load side. has a purpose to

In addition, to provide a power saving device capable of safely and firmly fixing the toroidal core inside the case of the power saving device and easily discharging heat generated from the toroidal core to the outside to prevent a rise in the temperature of the device. It has a different purpose.

A power saving device according to the present invention for achieving the above object includes a case in which a space is formed and the inner space is divided into a first space and a second space by a vertical bar formed on one side;

a parking circuit breaker provided in the first space and to which external supply power is applied;

at least one shelf formed in the second space;

A secondary coil provided on the shelf and connected to the main circuit breaker is wound, and the voltage induced in the primary coil is adjusted to a voltage corresponding to a reference voltage set by a plurality of taps and then output. a toroidal core wound in a reverse direction to the primary side coil;

a fixing plate seated on an upper portion of the toroidal core and having a through hole formed in a central portion;

a fastening screw having one end passed through the central portion of the fixing plate and the hollow portion of the toroidal core and then passing through the shelf to be fastened with a nut and fixing the toroidal core to the shelf;

According to the control signal, the main breaker and the toroidal core are disconnected from the main circuit breaker and the bypass mode for supplying the supply voltage of the main circuit breaker to the load side without passing through the toroidal core, and the main circuit breaker and the toroidal core are connected to A mode changeover switch that selectively adopts one of voltage control modes in which supply voltage is adjusted to a reference voltage set by one tap selected from among a plurality of taps of a secondary side coil and then supplied to a load side; and

A control signal is sent to the mode changeover switch to compare the voltage value input to the main circuit breaker with the average input voltage value, calculate a transformed voltage value according to the comparison of the voltage values, and adjust the input voltage to a voltage corresponding to the calculated value. and control means for outputting power information related to input and output voltages to the outside.

In addition, the present invention further includes a current detector for detecting an overcurrent of the supply power applied to the main circuit breaker and providing an overcurrent signal and a current value to the control means when overcurrent of the supply power is detected, wherein the control means is characterized in that a control signal for allowing the mode changeover switch to select a bypass mode is provided to the mode changeover switch according to the signal of the current detector.

In addition, the control unit may include an input unit for inputting a current value of the current detector or inputting operating conditions for voltage regulation;

a measuring unit measuring the regulated voltage and current based on the condition input from the input unit;

a calculation unit for calculating a control value for the mode changeover switch to adopt either a bypass mode or a voltage regulation mode according to the measurement value of the measuring unit;

a storage unit for storing input values, measured values, or calculation values of the input unit, the measurement unit, and the calculation unit; and

and a controller equipped with a microcontroller for controlling the mode switching switch through the control value calculated by the calculation unit so that a constant voltage can be supplied to the load side.

The present invention has the effect of improving the performance and lifespan of the load by stably adjusting the supplied voltage through a toroidal core, a mode changeover switch, and a control means for controlling it and supplying it to the load side, thereby reducing power consumption. There are significant savings that can be made.

In addition, when overcurrent occurs in the supply power applied from KEPCO, by applying the supply power to the load side without passing through the toroidal core, there is an effect that damage and life span of devices and parts due to overcurrent supply can be extended.

In addition, the toroidal core in which the primary and secondary coils are wound can be safely and firmly fixed inside the case, and the heat generated in the toroidal core can be easily discharged to the outside to prevent the temperature rise of the device. there is

1 and 2 are a front view and a rear view showing the inside of a power saving device according to the present invention
3 and 4 are cross-sectional views of fastening and fastening states in which the toroidal core is fixed inside the case;
5 is a block diagram of a control means of a power saving device according to the present invention;

The embodiments to be described below are intended to be described in detail so that those skilled in the art can easily practice the invention, thereby limiting the technical spirit and scope of the present invention. doesn't mean

In addition, the size or shape of the components shown in the drawings may be exaggerated for clarity and convenience of description, and terms specifically defined in consideration of the configuration and operation of the present invention may vary depending on the intention or custom of the user or operator. It can be, and it is revealed that the definitions of these terms should be made based on the contents throughout this specification.

Hereinafter, a preferred embodiment of an industrial power saving device according to the present invention will be described with reference to the accompanying drawings.

In the power saving device according to the present invention, a space is formed therein, and the inner space is divided/divided into a first space part 12a and a second space part 12b by a vertical bar 11 formed on one side. case 10; a main circuit breaker 20 provided in the first space 12a and supplied with external power; at least one shelf 13 formed in the second space 12b; The primary coil provided on the shelf 13 and connected to the main circuit breaker 20 is wound, and the voltage induced in the primary coil is adjusted to a voltage corresponding to the reference voltage set by a plurality of taps. a toroidal core (40) in which a secondary coil is wound in a reverse direction to the primary coil; a fixing plate 41 seated on the upper portion of the toroidal core 40 and having a through hole 41b formed in the central portion; One end passes through the central part of the fixing plate 41 and the hollow part of the toroidal core 40 and then passes through the shelf 13 to be fastened with the nut 43, and the toroidal core 40 is connected to the shelf 13 ) Fastening screw 42 for fixing; According to a control signal, a bypass mode in which the connection between the main circuit breaker 20 and the toroidal core 40 is disconnected and the supply voltage of the main circuit breaker 20 is supplied to the load side, and the main circuit breaker 20 and the toroidal core (40) is connected to adjust the supply voltage of the main circuit breaker 20 to the reference voltage set by one tap selected from among the plurality of taps of the secondary side coil, and then selects one of the voltage control modes to be supplied to the load side. A mode changeover switch 30 adopted as; And a control signal to compare the voltage value input to the main circuit breaker 20 with the average input voltage value, calculate the transformed voltage value according to the comparison of the voltage values, and adjust the input voltage to a voltage corresponding to the calculated value. It is characterized in that it includes; control means 50 for transmitting to the mode changeover switch 30 and outputting power information related to the input and output voltage to the outside.

In addition, the present invention detects the overcurrent of the supply power applied to the main circuit breaker 20, and when the overcurrent of the supply power is detected, a current detector for providing a signal and a current value according to the overcurrent to the control means 50; Further, the control means 50 provides a control signal for the mode changeover switch 30 to select the bypass mode according to the signal of the current detector to the mode changeover switch 30. .

In addition, the control unit 50 includes an input unit 53 for inputting the current value of the current detector or inputting operating conditions for voltage regulation; a measurement unit 54 for measuring the regulated voltage and current based on the condition input from the input unit 53; a calculation unit 55 for calculating a control value for the mode changeover switch 30 to adopt either a bypass mode or a voltage regulation mode according to the measurement value of the measuring unit 54; a storage unit 56 for storing input values, measured values, or calculation values of the input unit 53, the measurement unit 54, and the calculation unit 55; and a control unit 57 equipped with a microcontroller for controlling the mode changeover switch 30 through the control value calculated by the operation unit 55 so that a constant voltage can be supplied to the load side.

As shown in FIGS. 1 and 2, the power saving device according to the present invention stably regulates the supply power supplied from KEPCO so that rated power is output to the load side, and a case 10 having a predetermined volume is provided. Inside the case 10, the main circuit breaker 20 to which power supplied from KEPCO is applied through the bus bar 15a, and the supplied power of the main circuit breaker 20 are stably stabilized by a mutual induction reactor method. A toroidal core 40 that adjusts and outputs voltage, a mode changeover switch 30 that selectively provides the supplied power to the toroidal core 40 or a load side according to the current value of the supplied power, and the mode changeover switch ( 30) includes a control means 50 for controlling.

In addition, the present invention detects an overcurrent of more than a reference current value from the power supplied by the main circuit breaker 20, and when overcurrent of the supplied power is detected, a signal and a current value according to the overcurrent are provided to the control means 50 Current Detector; further includes.

The case 10 has a space formed therein, a front surface is blocked or opened by an opening/closing door, and an LED display unit is formed in the opening/closing door.

In addition, a vertical bar 11 is formed on one side of the inside of the case 10, and is divided into a first space portion 12a and a second space portion 12b by the vertical bar 11. That is, inside the case 10, the first space portion 12a is formed on the left side of the vertical bar 11, and the second space portion 12b is formed on the right side of the vertical bar 11. And, the second space portion 12b is opened or closed by a shielding door formed on the front side.

A main breaker 20, a mode changeover switch 30, and a control means 50 are provided in the first space 12a.

In addition, at least one or at least two shelves 13 are provided in the second space portion 12b, spaced apart from each other at a predetermined interval above and below, and a toroidal core 40 is provided on the shelf 13.

In addition, the vertical bar 11 may be provided on the right side of the case 10, and a plurality of fastening holes spaced apart at regular intervals in the up and down directions may be formed inside, and among the fastening holes Since the shelf 13 is bolted and fixed to one fastening hole, the shelf 13 can be easily fixed to the vertical bar 11 and the height of the shelf 13 can be easily adjusted. .

In the toroidal core 40, the primary coil is connected to the main circuit breaker 20, the secondary core 40 having a plurality of tabs is wound in the reverse direction of the primary coil, and the primary coil is the main circuit breaker. The supply power of (20) is applied, and the secondary coil uses a plurality of taps to reduce or boost the voltage induced in the primary coil to adjust the supplied power to a voltage corresponding to the set voltage.

The toroidal core 40 can arbitrarily adjust and input or automatically adjust the step-down or step-up value according to the variable input voltage regardless of single-phase or three-phase voltage fluctuations supplied from KEPCO through the main circuit breaker 20, and the voltage It is wound so that it can be adjusted to about 220 [V] ± 2% (216 [V] ~ 224 [V]) or 380 ± 3% (370 [V] ~ 390 [V]).

In addition, the toroidal core 40 has one reference tap, four pressure-reduction taps composed of -3 [V], -6 [V], -9 [V], and -12 [V] and +3 It can include multiple taps, including two boost taps composed of [V] and +6[V], and multiple taps increase or decrease in size from 3[V] to 5[V] in one standard tap. or may increase, and it is most preferable that the tap forms a voltage difference of 3 [V] from the reference tap. This has a problem in that the voltage cannot be finely adjusted when the voltage difference between the multiple taps is greater than 3 [V], and when the voltage difference between the multiple taps is formed smaller than 3 [V], the fine adjustment of the voltage is possible, but it is too much. The downside is that it requires a lot of tabs. However, the voltage difference between the taps and/or the number of taps may be variously modified or designed.

In addition, the toroidal core 40 is composed of one primary coil, a secondary coil unit, and a changeover switch in a single phase, and three primary coils, secondary coils, and a changeover switch in a three-phase medium. consists of

The toroidal core 40 is fixed to a shelf 13 provided in the second space 12b inside the case 10, and a vertical bar 11 is provided on one side of the inside of the case 10, A second space 12b is formed on the right side of the vertical bar 11, and at least two shelves 13 are horizontally disposed in the second space 12b. The toroidal cores 40 are disposed on the shelf 13 one by one.

Although three toroidal cores 40 can be placed on one shelf 13, various safety accidents such as electromagnetic waves caused by electromagnetic induced current of the toroidal core 40, current interference, or malfunction due to high heat do not occur. It is preferable to place one toroidal core 40 on one shelf 13 so as not to

3 and 4, the toroidal core 40 is fixed to the top of the shelf 13, a plurality of through holes are formed in the shelf 13, and the position of the one through hole is The hollow part of the toroidal core 40 is disposed. In addition, an insulating member 44 is provided on the top and/or bottom of the toroidal core 40, a fixing plate 41 is laminated on top of the insulating member 44, and the fixing plate 41 and the shelf 13 The toroidal core 40 is fixed to the shelf 13 by a fastening screw 42 that passes through the through hole of the shelf 13 and is fastened to the nut 43 at the lower side of the shelf 13.

By forming a plurality of through holes in the shelf 13, the toroidal core 40 can be easily fixed by being placed at a desired location, and heat generated from the toroidal core 40 can be discharged.

The fixing plate 41 has a seating portion 41a that is recessed while being bent downward, and a through hole 41b for inserting a fastening screw 42 is formed at the center of the seating portion 41a. In addition, the seating portion 41a may protrude downward from the fixing plate 41, and in this case, the seating portion 41a is inserted into the hollow of the toroidal core 40 and fastened to the through hole 41b. A screw 42 is inserted, and the fastening screw 42 passes through the through hole 41b and the hollow part of the toroidal core 40 and then through the through hole of the shelf 13 at the lower side of the shelf 13. It is fastened to the nut 43. In addition, since the head of the fastening screw 42 is disposed on the seating portion 41a, the head of the fastening screw 42 does not protrude/expose to the top of the fixing plate 41.

The insulating member 44 should be formed in the shape of a ring or a toroidal core 40 having a hollow part for the fastening screw 42 to pass through, or a through hole should be formed in the central part.

Accordingly, the toroidal core 40 is stably fixed to the upper portion of the shelf 13 by the fixing plate 41, the fastening screw 42, and the nut 43.

And the shelf 13 is fixed to the vertical bar 11 having a plurality of fastening holes by bolts, and according to the thickness of the toroidal core 40, the position of the shelf 13 or the shelf 13 and the shelf 13 ) can be easily adjusted.

On the other hand, the current detector provides the current value of the supply power applied to the main circuit breaker 20 to the control means 50, and measures the current value of the supply power applied to the busbar 15a of the main circuit breaker 20. It measures in real time, and when the current value of the supplied power is applied to the main circuit breaker 20 at a value greater than or equal to a preset reference value, a signal according to the overcurrent is provided to the control means 50.

In addition to the current detector, an overvoltage detector for measuring an overvoltage of supplied power may be provided.

In addition, the present invention is provided with a mode changeover switch 30 for supplying the supply power to a load in either a bypass mode or a voltage regulation mode according to a control signal according to the current value of the current detector.

The mode changeover switch 30 connects the main circuit breaker 20 to the secondary side coil of the toroidal core 40 or the load side bus bar 15a, and the main circuit breaker 20 according to the current or voltage value of the current detector. ) and the toroidal core 40 are disconnected and the main circuit breaker 20 is connected to the load side busbar 15a, or the bypass mode or the main circuit breaker 20 is connected to the secondary coil of the toroidal core 40 Selectively adopts one of the voltage regulation modes.

Three busbars 15a of the main breaker 20 and 3 busbars 15b on the load side are provided to apply three phases of R, S, and T, and the busbar 15a of the main breaker 20 and The busbar 15b on the load side is electrically connected to the bypass relay 31, and the bypass relay 31 receives the power supply of three phases R, S, and T according to the control signal of the mode changeover switch 30. The busbar 15a of the main circuit breaker 20 and the load-side busbar 15b corresponding to the busbar 15a of the main circuit breaker 20 are connected or disconnected.

According to the control signal of the mode changeover switch 30, the bypass relay 31 connects one of the three busbars 15a of the main circuit breaker 20 to one of the busbars 15a and a load-side busbar 15b corresponding thereto. ) is electrically connected to transmit the supply power of the main breaker 20 to the load side or by disconnecting the bus bar 15a of the main breaker 20 and the load-side bus bar 15b, the supply power of the main breaker 20 Block the direct supply to the load side.

That is, in the bypass mode, the mode changeover switch 30 supplies the supplied power supplied through the main circuit breaker 20 to the load side as it is without correction, and in the voltage control mode, the supplied power of the main circuit breaker 20 A stable voltage is supplied to the load side by adjusting to a reference voltage or a set voltage by the toroidal core 40.

In the bypass mode, when an overcurrent is detected in the current detector or when a malfunction occurs in a device such as the toroidal core 40, the connection between the main circuit breaker 20 and the toroidal core 40 is disconnected by the mode conversion switch , The bypass relay 31 operates according to the signal of the mode changeover switch to directly supply the supply power of the main circuit breaker 20 to the load-side bus bar 15a, and the supply power does not pass through the toroidal core 40. It is supplied to the load side without interruption and has the effect of preventing damage to devices and parts.

The mode switching switch 30 is switched to the bypass mode by a control signal provided from the control means 50 when an overcurrent is detected in the power supplied to the main circuit breaker 20 by the current detector.

The control means 50 sends a control signal for the bypass mode to the mode changeover switch 30 according to the overcurrent signal provided from the current detector, stops driving of various control devices of the device, and the mode changeover switch ( 30) operates the bypass relay 31 to directly send the supply power of the main circuit breaker 20 to the load side.

In addition, the present invention further includes a surge voltage removal filter 33 between the toroidal core 40 and the load side to protect the load from the surge voltage included in the voltage applied to the toroidal core 40. include Since the surge voltage is a high voltage, it gives a serious shock to the load side. Therefore, a surge voltage removal filter 33 is provided to protect the load by preventing shock from the surge voltage.

In addition, the present invention, a shaft made of a square type screw pitch can be installed, and a drive motor equipped with an encoder to rotate the shaft by a control signal from the control means 50 on one side of the shaft A driver having can be formed.

In addition, a switch head may be installed on the shaft in a movable state, and the switch head is moved while the shaft rotates according to the drive of the driver, and an arbitrary channel to which each tab of the toroidal core 40 is connected By connecting the busbars 15b to each other, power corrected by reducing or boosting the voltage can be supplied to the load-side busbar 15a through the selected channel.

As shown in FIG. 5, the control means 50 of the present invention compares the voltage value input from the main circuit breaker 20 or the current detector with the average input voltage value, and calculates the transformed voltage value according to the comparison of the voltage value. It provides a control signal for adjusting the voltage corresponding to the calculated value to the mode switching switch 30, and provides power information related to the input and output voltage to the outside through the LED display provided on the gate on the front of the case 10. output as

In addition, the control means 50 is involved in voltage regulation and measures the regulated voltage and current through the input unit 53 for inputting the operating conditions of the device, and the conditions input from the input unit 53, and the measurement A measurement unit 54 that detects abnormal currents such as undercurrent, overcurrent, and overvoltage of the measured voltage/current, and the mode changeover switch 30 according to the value measured by the measurement unit 54 is in bypass mode or voltage regulation mode An arithmetic unit 55 that calculates a control value so that one can be selected, a storage unit 56 that stores values input or measured by the input unit 53, the measurement unit 54, and the arithmetic unit 55, and an electronic watt-hour meter The power information input from the input unit 53, the operating conditions of the input unit 53, and various values stored in the storage unit 56 are transmitted to the LED display unit 60 so that the user can check them, and a predetermined input signal is received from the user or the power system. Transmitter 52 and receiver 51, which perform bidirectional communication in a wired and wireless manner, and the mode changeover switch through the value calculated by the calculation unit 55 according to the operation conditions input to the input unit 53 and a controller 57 that controls the entire device so that a constant voltage can be supplied to the load side by controlling 30.

The LED display unit 60 displays power information, operating conditions of the input unit 53, values stored in the storage unit 56, bypass mode or voltage saving mode status of the mode changeover switch 30, and overcurrent of the current detector. It may include detection and display of the driving state of the surge voltage removal filter.

The control means 50 measures the voltage supplied from KEPCO, collects the measured values, calculates an average voltage value, and sets a transformed voltage value.

Therefore, according to the control signal of the control means 50, the mode changeover switch 30 adopts either the bypass mode or the voltage control mode, and when the voltage control mode is adopted, the main circuit breaker 20 is applied The voltage of the supplied power is reduced or boosted to a voltage corresponding to the reference voltage set by the toroidal core 40 so that stable power is supplied to the load side.

Although the present invention has been described in relation to the above-mentioned preferred embodiments, it will be readily recognized by those skilled in the art that various modifications and variations can be made without departing from the spirit and scope of the invention, and all such changes and modifications are It is self-evident that it falls within the scope of the claimed claims.

10: case 11: vertical bar
12a: first space 12b: second space
20: parking breaker 30: mode changeover switch
31: multi-channel switch 40: toroidal core
41: fixed plate 41a: seating part
42: fastening screw 43: nut
44: insulating member 50: control means
60: LED display

Claims (6)

A case 10 in which a space is formed inside and the inner space is divided into a first space 12a and a second space 12b by a vertical bar 11 formed on one side of the inside;
a main circuit breaker 20 provided in the first space 12a and supplied with external power;
at least one shelf 13 formed in the second space 12b;
The primary coil provided on the shelf 13 and connected to the main circuit breaker 20 is wound, and the voltage induced in the primary coil is adjusted to a voltage corresponding to the reference voltage set by a plurality of taps. a toroidal core 40 in which a secondary coil outputting the output is wound in a reverse direction to the primary coil;
a fixing plate 41 seated on the upper portion of the toroidal core 40 and having a through hole 41b formed therein;
One end passes through the central part of the fixing plate 41 and the hollow part of the toroidal core 40 and then passes through the shelf 13 to be fastened with the nut 43, and the toroidal core 40 is connected to the shelf 13 ) Fastening screw 42 for fixing;
A bypass mode provided in the first space and disconnecting the main circuit breaker 20 from the toroidal core 40 according to a control signal and supplying the supply voltage of the main circuit breaker 20 to the load side, and the main circuit breaker 20 and toroidal core 40 are connected to adjust the supply voltage to the reference voltage set by the toroidal core 40, and then selectively adopt any one of the voltage control modes to supply to the load side. transfer switch 30;
a surge voltage removal filter 33 provided between the toroidal core 40 and the load side and protecting the load from the surge voltage included in the voltage applied to the toroidal core 40; and
Control to compare the voltage value of the supply power input to the main circuit breaker 20 with the average input voltage value, calculate the transformed voltage value according to the comparison of the voltage values, and adjust the input voltage to a voltage corresponding to the calculated value. A power saving device characterized in that it comprises a; control means (50) for transmitting a signal to the mode changeover switch (30) and outputting power information related to input and output voltages to the outside.
According to claim 1,
A current detector for detecting overcurrent of the supply power applied to the main circuit breaker 20 and providing an overcurrent signal and a corresponding current value to the control means 50 when overcurrent of the supply power is detected; further comprising,
The power saving device, characterized in that the control means (50) provides a control signal for the mode changeover switch (30) to select the bypass mode according to the signal of the current detector to the mode changeover switch (30).
According to claim 1,
According to the control signal of the mode changeover switch 30, the bypass relay 31 that connects or disconnects the bus bar 15a of the main circuit breaker 20 and the load-side bus bar 15b corresponding to the bus bar 15a. ); Power saving device comprising a.
According to claim 1,
At the center of the fixing plate 41, a seating portion 41a is formed that is bent downward and has a predetermined depth. The seating portion 41a is inserted into the hollow portion of the toroidal core 40, and the through hole 41b A power saving device characterized in that formed in the seating portion (41a).
According to claim 1 or 2,
The control means 50,
an input unit 53 for inputting the current value of the current detector or inputting operating conditions for voltage regulation;
a measurement unit 54 for measuring the regulated voltage and current based on the condition input from the input unit 53;
a calculation unit 55 for calculating a control value for the mode changeover switch 30 to adopt either a bypass mode or a voltage regulation mode according to the measurement value of the measuring unit 54;
a storage unit 56 for storing input values, measured values, or calculation values of the input unit 53, the measurement unit 54, and the calculation unit 55; and
A control unit 57 equipped with a microcomputer for controlling the mode changeover switch 30 through the control value calculated by the operation unit 55 so that a constant voltage can be supplied to the load side; power saving characterized in that it comprises a Device.
According to claim 5,
The control unit 50 further includes an LED display unit 60 through which a user can check power information, an operating condition of the input unit 53, and a value stored in the storage unit 56,
The power saving device, characterized in that the LED display unit (60) displays the bypass mode or voltage saving mode state of the mode changeover switch (30), the overcurrent detection of the current detector, and the driving state of the surge voltage removal filter.

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