KR101216882B1 - Smart Switching Apparatus and Method for Electric Power Saving - Google Patents

Abstract

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a remote control and manual switching device and method for reducing power and outlet receptacle (hereinafter referred to as "outlet") load power of a building, and more specifically, to one common terminal. Connect the remote control relay switch with two contacts a and b which are alternately switched each time the switch is operated, and the manual switch having the same contact structure is connected between terminals a and terminals b respectively. The common terminal of the remote control relay switch is connected to the power input terminal, and the common terminal of the manual switch is connected to the load connection terminal to collect the information on the real-time use status of the lamp and the outlet load to save power. The power management server and the load user who control the switch remotely freely as needed regardless of the current switch position. The position can be turned ON / OFF, and it is not necessary to set or release modes such as automatic mode and manual mode when operating the switch, and the user can operate the switch manually without affecting the failure even if the relay switch control circuit fails. And, by feeding back the voltage and current information of the switch load connection stage to the power management server, it is possible to immediately detect whether the control command is fulfilled, whether the switch is manually operated, and whether the switch circuit is abnormal. The remote control can be used to turn the switch on and off.In particular, when using it as a light switch, it is equipped with an additional power saving mode switching function to enable the establishment of a more delicate power saving strategy. It relates to a remote control and manual operation switching device and method that can be. (If the light switch and the outlet switch need to be described separately, they shall be labeled as "light switch" or "outlet switch".)
The switching device includes a power management server that collects the information related to the use of the lamp and the outlet load to determine whether the load on / off and enter the power saving mode; A local switching unit having a switch contact that can be operated by the power management server and the manual remote controller and the manual switch operation button; In addition, when used as a light switch, it is additionally configured as a saving mode switching unit for supplying saving mode power to reduce power consumption or returning to the original power by receiving a control signal for entering and releasing the power saving mode.
The local switching unit receives the switch operation instruction message from the power management server and the manual remote controller according to the set communication protocol, transmits information related to the state of the switching device to the power management server, and controls the internal control via a communication line or using a rechargeable photovoltaic cell. A communication interface for supplying power and a control power supply; A switch control unit which generates a switch operation control signal according to an instruction from a power management server or a manual remote controller, configures a report message related to the state of the switching device and the load power, and transmits the report message to the communication interface and the control power supply unit; A relay switch unit operated by a control signal from the switch control unit; A manual switch unit that allows the user to manually turn on / off the power to the lamp or outlet, and detects the voltage and current state of the load connection end of the switching device and inputs it to the switch control unit to detect the state of the switch. And a display unit; In the case of the light switch further includes a power saving mode switching unit for supplying the power saving mode for reducing power consumption by receiving the control signal to enter and release the power saving mode or return to the original normal power.

Description

Smart Switching Apparatus and Method for Electric Power Saving

The present invention relates to a remote control and manual operation switching device and method necessary to reduce the lighting and outlet load power as much as possible, and more specifically, operates by receiving a remote control command according to the use of the load from the power management server at the same time The switch can be turned ON / OFF freely without setting or switching the mode manually or by using the remote controller.In case of failure of the control circuit, the load user can turn the switch ON / OFF manually without affecting the failure. When used as a light switch, the present invention relates to a safe and convenient power saving supporting remote control switching device and method that can be switched to a power saving mode.

      Currently, the lighting power saving system that is put into practical use includes moving the light fixture in the case where the light is installed in a location where there is no need to keep the light on when there is no person, such as a porch, a stairwell, an office, a room, a toilet, etc. There are simple power-saving light fixtures that attach a detection sensor to light up when motion is detected in the surroundings and turn off the light again if there is no motion after a certain period of time. A system has been introduced that reduces power consumption by lowering the level. In addition, in order to manage a large number of lights more systematically by setting a group or pattern of lights in advance to be turned off and on together at a predetermined time, and lighting control systems that can be turned off and on remotely with a light management server if necessary It is mainly used to control common light loads in buildings and apartments. However, in the case of lighting and extinguishing with a simple motion sensor, when people go in and out frequently, the lighting and extinguishing will be repeated repeatedly, shortening the life of the lamp, reducing emotional stability to users, and moving even if there is a person. If you do not have it, it will be turned off. If you want to turn it on again, you will have to move the sensor partly within the range of the sensor to operate it again.In addition, you need to install the sensor separately for each lamp you want to control. There is a problem that is difficult to apply. In the case of the parking lot, a system for turning on the lights in the direction of the car using sensors has been released, but when the car is frequently entering and exiting, the lights are repeatedly turned on and off, especially when getting out of the car and entering the building or boarding. There is a problem that it is difficult to control the light for the driver to access the car.

In the case of building lighting control systems which are mainly installed and used, the relay switches are accommodated inside the lighting control panel to be installed separately, and the contact point of the relay switch installed in the lighting control panel through a local light ON / OFF manual switch or a remote lighting control computer. Turn on and off by turning on and turn on or off the group or pattern of lights that you want to turn on and off together in advance and set the time so that the lights of set group or pattern are turned on or off automatically. I'm in control. However, in this case, it is necessary to artificially form a group and a pattern, and to set the lighting and lighting time in advance, so there is a limit in flexibly adapting to the change of the situation such as a temporary holiday, the night shift, and the working day. The need for continuous updates is inconvenient and requires a significant amount of management staff, and the savings are highly dependent on the quality of management. In addition, the manual switch is also connected to the light circuit through a relay, and when the failure occurs in the relay operation circuit, there is a problem that can not be turned ON / OFF even manually. In addition, since the power supply lines of the lights connected to each light switch must all go through the lighting control panel, the length of the wiring is long and there is a problem of newly installing the light wiring in the main building.

In addition, as a way to save power, the parking lot is divided into A group and B group in the design of parking lot, and in order to save power consumption, only one group can be turned on alternately. Even in this case, the lights in the group are turned on continuously regardless of the vehicle's entry and exit, so no more power can be saved. In the case of the office, all the lights may be turned off at lunch time, but if some workers remain, the lights may not be turned off. There was a discomfort that did not fit emotionally. Dimming (dimming) switch may be installed to reduce the inconvenience of turning off all the lights, but in general, the dimming switch is expensive and the power saving effect is not very large.

In the case of an outlet, sensors and controllers are built into the direct type outlets that are directly attached to the outlets, or the power strips that are extended to the outside. There are products to reduce the standby power by cutting off the power when a small current of standby power level flows, and to cut off the power of the peripheral devices of the computer connected to the multi-tap when the keyboard is not input for a certain time. In addition, the switching method and device that allows the computer to determine the load connected to the outlet and the usage of the load to remotely manage the power supply of the outlet, and to allow the computer and the user to override each other's recent switching operations as needed, It is not developed properly yet.

In order to solve the problems listed above and effectively save power, the power supply to the load can be controlled remotely at any time based on the use situation of the load. A switching device capable of an OFF operation is required.

The technical problem to be achieved by the present invention is the power management server grasps the load of the power and lighting load of the building, such as office and commercial buildings, public institution buildings, apartments, schools, factories, houses, etc. It can control the disconnection and connection of the power supply, and at the same time, the user can manually turn on / off the load power at any time, especially when the user cannot manually operate it remotely due to the abnormality of the switch control circuit. It is possible to turn on / off and install simply by installing simple communication line and replacing existing light switch outlet receptacle. Do not use lights directly, but for safety or emotional reasons Inevitably it is necessary to provide a remote control switching device and method that can support a convenient and safe power saving to set the power saving mode that can save a large amount of power with only a simple additional device and operation when inevitable.

      In order to achieve the above technical problem, the remote control and manual operation switching device for power saving according to the present invention collects information related to the use of the light and outlet load to the ON / OFF and power saving mode of the load A power management server to determine whether to enter; A local switching unit having a switch contact that can be operated by the power management server and the manual remote controller and the manual switch operation button; In addition, when used as a light switch, it is additionally configured as a power saving mode switching unit for supplying power saving mode for reducing power consumption or returning to the original power by receiving a control signal for entering and releasing the power saving mode.

The local switching unit receives the switch operation instruction message from the power management server and the manual remote controller according to the set communication protocol, transmits information related to the status of the switching device and the load power supply to the power management server, and communicates via a communication line or a rechargeable photovoltaic cell. A communication interface for supplying internal control power using the control power supply; A switch control unit which generates a switch operation control signal according to an instruction from a power management server or a manual remote controller, configures a report message related to the state of the switching device and the load power, and transmits the report message to the communication interface and the control power supply unit; A relay switch unit operated by a control signal from the switch control unit; Manual switch unit that allows the user to manually turn on or off the power to the lamp or outlet; A switch state detection and display unit for sensing a voltage and current state of a load connection end of a switching device and inputting the state to a switch control unit and indicating a state of a switch; In the case of the light switch further includes a power saving mode switching unit for supplying the power saving mode for reducing power consumption by receiving the control signal to enter and release the power saving mode or return to the original normal power.

The switching device allows the power management server and the user to freely turn the switch on and off, respectively, without the need for setting or releasing modes such as automatic mode and manual mode when the switch is operated, and in case of failure of control and communication circuits or relay switches. In addition, the user can operate the switch manually and continuously without being affected by the failure, so that the remote control has one common terminal and two switching contacts a and b connected to the common terminal alternately every time the switch is operated. Connect the relay switch and the manual switch with the same contact structure, respectively, with the a terminal connected to the a terminal and the b terminal connected to the b terminal, and the common terminal of the remote control relay is connected to the power inlet terminal, and the common terminal of the manual switch is the load. It has a structure for connecting to the connecting end.

In addition, the switching device has an additional power saving mode in the case of a light switch to enhance the power saving effect.

In addition, in order to immediately detect whether the switch control command from the power management server is actually properly executed, whether the user manually operates the switch, whether the standby power is consumed, and whether there is an abnormality in the switch circuit. Equipped with reporting of power status.

      In the power saving switching device and method according to the present invention, the following effects can be expected.

That is, both the computer remotely giving the switch control command and the subordinate users who operate the switch manually or by using the remote control can freely control each other's recent switch operation at any time without the need of setting or releasing a mode such as an automatic mode or a manual mode. There is an advantage that it can perform ON / OFF that overrides.

And according to the present invention there is an advantage that can be manually and manually ON / OFF continuously without being affected by the failure even when the switch control circuit or relay switch failure.

Further, according to the present invention, the power supply status of the switch load connection terminal is fed back to the power management server to determine whether the remote switch operation instruction is actually implemented, as well as whether the load user manually switches the operation, consumes standby power, and whether the switching circuit is abnormal. Power management server can check immediately, and if you aggregate the status report from the various switches, there is an advantage that can determine the abnormality of the feeder (feeder), power.

In particular, when used as a light switch, even if the illuminance lower than the normal use illuminance, if the need to keep the lights on, there is an advantage that can further increase the power saving effect by switching to the power saving mode.

In addition, in the case of light switches, unlike the existing lighting control system in which power wiring of each switch must pass through the lighting control panel, the switch is replaced at the installation position of the manual switch, and only one communication line passes through each switch in common. This has the advantage of simplifying wiring and construction.

1 is a block diagram showing the configuration of a power saving assist switching device according to an embodiment of the present invention; and
FIG. 2 is a flowchart illustrating a power saving assist switching process of the block diagram of FIG. 1.

      Hereinafter, with reference to the accompanying drawings will be described in detail with respect to preferred embodiments of the remote control and manual operation combined power saving support switching device and method according to the present invention.

1 is a block diagram showing a preferred embodiment of a remote control and a manual operation power saving support switching device according to the present invention.

Referring to FIG. 1A, a power saving support switching device according to the present invention includes a local switching unit 100 and a power management server 200, and the power management server 200 is a local switching unit 100 by wire or door. It is possible to control, it is also possible to be further provided with a manual remote control 300 or a sensor if necessary for wireless control. Again, the local switching unit 100 is the communication interface and control power supply 10, the switch control unit 20, the relay switch unit 30, the switch state detection and display unit 40, the manual switch unit 50 and the light switch In this case, the power mode switching unit 60 is further provided.

First, the communication interface and the control power supply unit 10 are in charge of the communication with the remote control power management server 200 and the manual remote controller 300 to collect information related to the light and outlet load use situation to make switch operation decisions. Receives the message sent from the power management server and the switch operation signal from the manual remote controller according to the protocol of the communication method, and transmits it to the switch control unit 20, the message to be sent from the switch control unit 20 to the power management server It receives the input and sends it to the power management server, and includes a communication line connection jack (jack) and a communication chip (chip) for this. Communication means include wired communication such as RS-485, LAN, PLC, and wireless communication such as Zigbee, and supply internal control power by using part of rechargeable photovoltaic cell or communication line.

The switch control unit 20 recognizes the switch operation command from the power management server and the manual remote control, and controls the relay switch unit 30 or the saving mode switching unit 60 accordingly, and the voltage and current values of the lamp and outlet load stages. The feedback from the switch state detection and display unit 40 and reports to the power management server through the communication interface and the control power supply 10. The switch operation command from the power management server or the manual remote controller includes an ON / OFF command of the relay switch, a switch to the power saving mode, and a command to return to the normal lighting mode. The switch controller 20 includes a micro controller capable of receiving a command message and executing a program to send a control signal to a corresponding port according to the content of the message. The microcontroller has an input / output port for communication with the communication interface and control power supply unit 10, the relay switch unit 30, the switch state detection and display unit 40 and the saving mode switching unit 60 as described above.

The relay switch unit 30 performs a function of turning on / off the relay switch according to a control signal coming down from the switch control unit 20. The relay switch uses a latch type to maintain the switch contact position even when relay power is not supplied. To this end, as illustrated in FIG. 1, a three-path (3) having a structure in which contacts a and b are alternately switched according to operation of the switch driving relay 31 and these two contacts are connected to one common terminal c is provided. -way) relay switch 32 is provided.

The switch state detection and display unit 40 detects the voltage and current of the load connection terminal and transmits the detected voltage and current to the switch control unit 20. For this purpose, a small-capacity instrument transformer and an interface circuit for inputting the sensed value to an analog-to-digital converter (ADC) built in the microcontroller of the switch control unit and the output from the switch control unit 20 are emitted. It is provided with the LED 41 which can be observed from the front surface.

The manual switch unit 50 performs a function of allowing a user of a light and an outlet load to manually turn the switch on and off manually. For this purpose, like the relay switch, the manual switch unit has alternating a contact points and b contact points. It is provided with a three-way manual switch 52 and a switch operation button 51 exposed to the outside of the structure connected to the common terminal c.

In this case, as shown in FIG. 1A, the contact a of the manual switch 52 is a contact point of the relay switch 32, and the contact b of the manual switch 52 faces the contact b of the relay switch 32. The common terminal c of the relay switch 32 is connected to the power supply terminal 33, and the common terminal c of the manual switch 52 is connected to the load connection terminal 53, respectively. In this case, the relay switch unit 30 and the manual switch unit 50 may be connected to each other in a different position. That is, as illustrated in FIG. 1B, the common terminal c of the manual switch 52 may be connected to the power supply terminal 33, and the common terminal c of the relay switch 32 may be connected to the load connection terminal 53, respectively. In addition, this connection structure shows the same effect.

By connecting the two switches in the same manner as described above, the user can freely connect and cut off the power of a lamp or an outlet directly manually if necessary regardless of the position of the relay switch 32 operated by the power management server and the manual remote controller. Regardless of the position of the manual switch 52, the management server has an advantage that can be arbitrarily connected and disconnected according to the result of the light or outlet load use situation determination.

In addition, since both switches can be connected and disconnected regardless of the contact position of each other, there is no need to set or switch to manual mode or automatic mode separately for the switch operation.

In addition, since the manual switch 52 can be operated regardless of the position of the relay switch 32, the relay switch contact point cannot be switched to the power management server or the manual remote control due to a failure of the relay switch control circuit or the relay switch itself. The user can freely connect and disconnect the power by mechanical operation of the manual switch, there is an advantage that does not have to wait until the repair of the control circuit or relay switch unit 30.

The saving mode switching unit 60 provides a function of supplying a voltage for maintaining only the minimum illuminance required to reduce power consumption in situations where it is inappropriate to completely turn off the safety or emotional light regardless of the design illuminance of the light. Perform. Unlike conventional devices that use a continuous dimming function for emotional lighting or a transformer with multiple switching taps to save power by maintaining the rated voltage when the power supply voltage rises, the lamps used reliably light up. Determine the appropriate voltage above the lowest voltage that can maintain and switch. In the case of lamps whose lifetime is affected by the low voltage, the appropriate saving mode voltage is selected in the range where the savings from the power savings are greater than the depreciation cost due to the reduction of the lifetime. The energy saving mode voltage is supplied through a transformer 63 configured as a device capable of converting a voltage inexpensively and conveniently, such as a single winding transformer. To this end, as shown in Figs. 1A and 1B, a reduction mode switching relay switch 62 having a contact a and b and a common terminal c is provided, wherein a contact is a normal lighting power supply and a b contact is a saving mode power supply. Connect. When the switch drive relay 61 is operated, the saving mode switching relay switch 62 is switched to the contact b, and at the same time, the no-load loss prevention relay switch 64 is closed to switch to the saving mode power supply. The no-load loss prevention relay switch 64 serves to prevent the no-load loss by separating the transformer part when returning to the normal power source. The reduction mode switching switch drive relay 61 is used as a non-latch type in which the switching relay switch 62 is a contact point when the driving power is cut off, and the non-load loss prevention relay switch 64 is returned to the open position.

At this time, the switching to the power saving mode can be performed for each light switch or for each light feeder. In the case of conducting the entire light feeder, the saving mode switching unit 60 may be accommodated together in the distribution panel or the lighting power management group may be separately placed near the distribution panel.In this case, the power of the secondary side of the circuit breaker for protecting each feeder of the distribution panel may be saved. It is connected to the power input terminal 65 of the switching unit so that the breaker of the distribution panel can be utilized as it is for overcurrent and leakage protection in the power saving mode. When the saving mode switching is to be performed for each light switch, the saving mode switching unit 60 is incorporated in the corresponding local switching unit.

Hereinafter, an embodiment of a preferred switching method using a switching device according to the present invention will be described in detail with reference to the accompanying drawings. 2 is a flowchart illustrating a method of switching a light power supply in the present invention. Except for the power saving mode control part, the flow chart of the method of switching the power supply for an outlet is also the same, and thus it will be shown together. First, when the local switching box is connected to the power management server, the control microcontroller of the switch controller 20 is reset and execution of the control program installed in the microcontroller is started accordingly. The control program first checks whether the relay switch 32 control instruction message has arrived from the remote power management server or the manual remote controller through the set of an interrupt bit (S201).

If the relay switch 32 control instruction message has not arrived, read the voltage and current values of the load connection end from the switch state detection and display unit 50, and inspect them to operate the user's manual switch 52 or connect the outlet load. It is determined whether the voltage or current of the load connection terminal is changed due to separation, breaker operation of the feeder, or power failure (S202). At this time, the variable value indicating whether the change is initialized to "change" in advance. If the voltage or current is changed, it is determined whether the voltage is newly applied or whether the voltage is removed (S203). If the voltage is removed, in the case of the outlet switch, set the variable value indicating the ON / OFF state of the voltage to OFF and report it to the power management server (S207). In the case of the light switch, first, it is checked whether the previous switch state is in the power saving mode (S205). If it is not in the power saving mode, the variable value indicating whether the lamp voltage is applied is set to "OFF" (S207). If it is in the power saving mode, the lamp may be turned on in the normal mode when it is turned on again. After the power saving mode is released (S206), the variable value is set to " OFF " (S207). If the voltage is newly applied, set the variable value indicating whether the voltage is applied to "ON", and report the result to the power management server (S204), and check whether the current of the load connection terminal is changed (S208). The change amount is reported to the power management server (S209). The power management server determines whether the switch is operated manually, whether the current is normal in the case of the light switch, the type of the connected load in the case of the outlet switch, whether the standby power is supplied, or the like based on the changed current value.

Next, when the relay switch control instruction message arrives from the server (S201), it is determined whether the instruction message is an ON / OFF related message of the relay switch or, in the case of a light switch, an additional message related to switching / release of the power saving mode. Determine (S211).

First, when the ON / OFF-related message of the relay switch is distinguished from the ON command or the OFF command again (S212), and in the case of the ON command, the ON control signal of the switch is output to the port to which the relay switch unit 30 is connected (S213). The switch state detection and feedback from the display unit 40 to determine whether or not the voltage is newly applied to the load connection terminal 53 to check whether the ON command is actually implemented (S214). When it is confirmed that the voltage of the load connection terminal 53 is newly applied, the variable value indicating the load power state is set to "ON" and reported to the power management server (S215). If it is not confirmed that the voltage is newly applied, set to "ON_Failure" and report the failure situation to the power management server (S216). The power management server will retry a certain number of times as needed and report it to the administrator if it cannot be resolved.

In the case of the power saving mode-related message of the light switch again (S211), by determining whether to enter or release the saving mode (S221), in the case of the entry message, the saving mode entry control signal to the port to which the saving mode switching unit 60 is connected. (S222) and whether the voltage of the light load connection terminal 53 is actually changed to the saving mode voltage by receiving a feedback from the switch state detection and display unit 50 to check whether the entry into the saving mode (S223). When it is confirmed that the saving mode has been successfully entered, the variable value indicating the saving mode state is set to "ON" (S224). If it fails to enter the saving mode, set the variable value to "ON_Failure" and transmits the failure status to the power management server (S225).

If the power saving mode release message again (S218), the power saving mode switching unit 60 transmits the saving mode release control signal to the connected port (S226) and the voltage of the light load connection terminal 53 actually changes to the normal lighting voltage. Whether to confirm whether or not to switch off the saving mode by receiving the feedback from the switch state detection and display unit 50 (S227). If it is confirmed that the saving mode is released, the variable value indicating the saving mode of the switch is reset to "OFF" (S228). If the saving mode is not released, the variable value is set to "OFF_Failure" and the saving mode release failure situation is set. Transfer to the management server (S229). If the failure of entering or releasing the saving mode fails, the power management server reports the attempt to repeat a certain number of times and reports to the manager if the failure continues.

After performing the above tasks, the program goes to sleep for a certain time and then wakes up (S210) and returns to the initial state to check whether the control signal is input from the power management server or the manual remote controller. In step S201, the loop is repeated.

According to a power saving switching method according to a specific embodiment of the present invention, the switching operation can be confirmed by the server to confirm the results of all switch operation instructions for power saving from the power management server, thereby increasing the reliability of the switching operation and saving the power management server. This has the advantage of being able to pinpoint the power being consumed.

In addition, when the switching devices according to the present invention are installed for each of the plurality of lights or heat feeders by light switches or by light outlets, the power management server collects report messages coming from the switching devices to light and outlet circuits. It is possible to infer various situations that occur in the system, which improves the reliability of the switch control and provides more sophisticated power savings. For example, when the power management server receives a message from the switching device of the present invention that the voltage of the lamp power output terminal is newly applied without the user's instruction, the power management server determines that the user has turned on the lamp or connected the outlet power by operating a manual switch. can do. In this case, the switch operation by the manual remote controller is recognized and reported by the switch controller, so there is no need to determine it separately. In addition, when the message of the voltage of the switch's load is removed without the power management server's instruction, the entire power supply of the distribution box, the breaker for the feeder, the user's manual switch off and the disconnection of the switch circuit, etc. Each of the possible situations can be determined as follows. First, all the switching devices connected to the other light feeders are also in a state where the supply power is cut off when the voltage at the output of the light power output is removed. If only the switching devices connected to the same feeder as the current switching device are removed, the feeder breaker is opened. If only the current switching device is removed voltage and motion is detected by a motion sensor installed near the switching device, the user can confirm that the lamp is turned off manually. We can infer the abnormality of the contact point of the switch circuit.

In addition, the outlet switch can determine whether the standby power is supplied when the current change report is raised and block it.

While the present invention has been particularly shown and described with reference to exemplary embodiments thereof, it is clearly understood that the same is by way of illustration and example only and is not to be taken by way of limitation in the embodiment in which said invention is directed. It will be understood by those skilled in the art that various changes in form and detail may be made therein without departing from the scope of the appended claims.

Claims (5)

A power management server that collects information related to a power usage situation of a load to indicate whether the load enters an ON / OFF or power saving mode by wire or wirelessly;
A switch control unit which makes a switching decision independently according to an instruction of the power management server or receives a switching state;
A relay switch unit having a 3-way switch structure which is ON / OFF according to a signal of the switch control unit and has a common terminal connected to a load terminal (or a power supply terminal), and a contact and b contact; And
3, which has a common terminal connected to a power supply terminal (or a load terminal) and a contact and b contact respectively connected to the a contact and the b contact of the relay switch part, which are mechanically turned on and off according to a user's switch button operation. A power saving assist switching device comprising; a passive switch unit of a three-way switch structure. The method of claim 1,
The switching control is controlled according to the entry or release instruction of the power management server into the power saving mode, and the a contact and the transformer unit and the no load unit are directly connected to the common terminal connected to the common terminal of the manual switch unit or the relay switch unit and the normal lighting power supply. Power saving mode switching unit including a power-saving mode switch unit having a three-way switch structure having a b-contact connected to the normal lighting power supply through a hand protection relay switch and a transformer unit; Support switching device. In the power saving support switching method having a switch control unit for reducing the power consumption of the load according to the power saving decision of the power management server or independently
(a) When operating power is applied to the local switching unit, the switch control unit periodically determines whether or not to perform a switching operation by itself or according to an instruction from the power management server (a1) or switch state detection and display unit. Checking (a2) whether a voltage and a current of a load connection terminal change in response to an input from the controller;
(b) in the case of performing the switching operation in step (a1), checking whether the voltage and current change in the load connection terminal after the switching operation and reporting the switching operation result to the power management server;
(c) checking the fact that the manual switch is operated and reporting it to the power management server when there is a change in voltage and current at the load connection terminal in step (a2); Way. The method of claim 3,
The step (a) further includes the step of monitoring (a3) whether the switch control unit is instructed to switch or cancel the power saving mode from the power management server.
(d) When the power saving mode switching or releasing is instructed in step (a3), the power saving mode switching unit outputs the power saving mode switching unit to the connected port, and checks whether the voltage state of the load connection terminal is entered or reduced. Reporting power to the power management server.

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