KR101652345B1 - Direct Load Control System Capable of Control Peak Power - Google Patents

Abstract

The load control system for controlling the maximum demand power includes an electronic watt hour meter for measuring a power consumption amount of a customer, a power amount pulse and a demand time pulse supplied from the electronic watt hour meter to a plurality of load devices installed in the customer, Current power and predicted power are calculated by using the power consumption and the maximum demand power for 15 minutes, and the power consumption of the plurality of load devices is supplied to the plurality of load devices so that the power consumption of the plurality of load devices does not exceed the target power A direct load control device for controlling power, and a control device for receiving and displaying the information calculated by the direct load control device, setting the target power, and changing the internal setting information of the direct load control device And a control unit connected to the monitoring unit via the Internet, And a server for receiving information calculated by the direct load control device and directly controlling the load control device to regulate power supplied to the plurality of load devices.

Description

BACKGROUND OF THE INVENTION 1. Field of the Invention [0001] The present invention relates to a load control system,

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a load control system for regulating a maximum demand power, and a load control system for controlling a maximum demand power capable of controlling power consumption of a plurality of load devices not exceeding a target power- To a load control system.

When a power supply company concludes a power usage contract with a customer, the base charge and the usage fee are calculated based on the contract power - instantaneous maximum power.

Conventionally, an analog watt-hour meter is installed in the customer, so that the accumulation of power consumption can be confirmed. Therefore, the power supply company can not confirm the maximum demand power of the customer - the instantaneous maximum power - in real time, indirectly calculates the maximum demand power of the customer based on accumulation of the power consumption in the unit of the month or month, .

That is, the power supply company defines the contracted power as the demand power for 15 minutes, and the instantaneous maximum power for the customer for 15 minutes as the contract power, and concludes the contract with the customer for the power use, .

It is very difficult to obtain adequate reserve power in a power supply company when indirectly estimating the maximum demanded power of a customer in the conventional manner. In other words, when the maximum demand power (contract power) is exceeded in many customers in a certain time zone such as the summer daytime, the conventional indirect estimation method can not confirm in real time which customer exceeds the maximum demand power, It is difficult to establish.

That is, on the power supply company side, it is difficult to confirm the maximum demanded power in real time, thereby causing difficulties in efficiently operating power generation facilities and energy resources. Also, in terms of the customer, it was not possible to systematically manage the power because it was impossible to know when the maximum demand power exceeded in which equipment.

SUMMARY OF THE INVENTION The present invention has been proposed in order to solve the above-described technical problems, and it is an object of the present invention to provide a power meter that calculates a reference power, a current power and a predicted power using a power pulse transmitted from an electronic watt- The maximum power demand is controlled so as not to exceed the target power - the maximum demand power for 15 minutes - by adjusting the power supplied to the load control system.

According to an embodiment of the present invention, there is provided an electronic watt hour meter for measuring power consumption of a customer; Current power and prediction using a power pulse and a demand time pulse transmitted from the electronic watt-hour meter and a predetermined target power-15 minutes maximum demand power, A direct load control device that calculates power and adjusts power supplied to the plurality of load devices so that the power consumption amount of the plurality of load devices does not exceed the target power based on the calculated result; A monitoring unit configured to receive and display information calculated by the direct load control device and set the target power and change internal setting information of the direct load control device in exchanging data with the direct load control device; And a controller for controlling the direct load control device to receive the information calculated by the direct load control device and to directly control the power supplied to the plurality of load devices by exchanging data with the direct load control device, And a load control system for adjusting the maximum demand power including the load control system.

The direct load control device collects and displays the voltage, current, active power, reactive power, apparent power, power factor, and 15-minute demand power of each load device of the plurality of load devices on a built-in display unit, And the demand time pulse, the target power, the reference power, the current power and the predicted power, the voltage, the current, the active power, the reactive power, the apparent power, the power factor and the 15- do.

Also, the direct load control device may be configured such that the first display lamp is turned on when the current power is equal to or higher than the reference power or the predicted power is higher than the target power, and the second display lamp is turned on when the power supplied to the at least one load device is cut off And the third display lamp is turned on when all of the power supplied to the plurality of load devices is cut off.

In addition, the monitoring unit may be configured to set an Internet IP address, a socket number, and a password input for connection between the direct load control device and the server.

The monitoring unit is configured to display voltage, current, power factor, active power, reactive power, and apparent power of each load device.

In addition, the monitoring unit may be configured to set a priority order of the plurality of load devices to adjust a power cutoff sequence.

Also, the server may display a load control start time, an end time, a total control time, and a control purpose on a display unit of the direct load control device before adjusting power supplied to the load device connected to the direct load control device, And the direct load control device is controlled according to whether the control is approved or not.

The server divides the difference between the adjusted power-estimated power and the target power by the demand time. When the time exceeding +5 to 9% of the total value of the target power is less than 60 minutes, Controls the direct load control device,

If the time when the adjusted power exceeds +10 to 15% of the total value of the target power is 60 minutes or more, the control approval is requested again even if the control approval is rejected, and then the direct load control device is controlled and,

And controls the direct load control device irrespective of whether or not the control is approved when the time when the adjusted power exceeds + 20% of the total value of the target power is 30 minutes or more.

The load control system for adjusting the maximum demand power according to the embodiment of the present invention can check the contracted power of the customer in real time and the instantaneous maximum power in the server of the power company, It is possible to easily secure the optimum reserve ratio of the recording medium.

In addition, when the target power is set directly to the load control device in the customer, the power supplied to the plurality of load devices is adjusted so that the direct load control device does not exceed the target power, thereby overcharging the charge exceeding the contracted power And it is possible to perform systematic power management based on the power usage information recorded in the direct load control device.

1 is a configuration diagram of a direct load control device and a load control system according to an embodiment of the present invention;
FIG. 1A shows definition of each power over time. FIG.
2 is a view showing a main screen of the display unit of the direct load control apparatus according to the embodiment.
3 is a view showing a setting screen of the display unit of the direct load control apparatus according to the embodiment.
4 is a view showing a first communication setting screen of the display unit of the direct load control apparatus according to the present embodiment.
5 is a diagram showing a second communication setting screen of the display unit of the direct load control apparatus according to the present embodiment.
6 is a view showing a login screen of the monitoring unit according to the embodiment.
7 is a view showing an information display screen of the monitoring unit according to the embodiment.
8 is a view showing a setting screen of the monitoring unit according to the present embodiment.
9 is a view showing an inquiry screen of the monitoring unit according to the present embodiment.
10 is a view showing a load device inquiry screen of the monitoring unit according to the present embodiment.
11 is a view showing a load device setting screen of the monitoring unit according to the present embodiment.

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Hereinafter, embodiments of the present invention will be described in detail with reference to the accompanying drawings, in order to facilitate a person skilled in the art to easily carry out the technical idea of the present invention.

1 is a configuration diagram of a direct load control apparatus and a load control system according to an embodiment of the present invention.

The load control system for adjusting the maximum demand power according to the present embodiment includes only a simple configuration for clearly explaining the technical idea to be proposed.

1, the load control system for controlling the maximum demand power includes an electronic watt-hour meter 100, a direct load control device 200, a monitoring unit 300, a server 400, and a plurality of load devices 510, 520, .

The main operation of the load control system that adjusts the maximum demanded power as described above will be described below.

For reference, in this embodiment, the contracted power is defined as the demand power of 15 minutes - the instantaneous maximum power of the customer for 15 minutes. Further, the target power is set to be equal to the contract power or smaller than the contract power since it is set power so as not to exceed the contract power. In this embodiment, the number of the plurality of load devices 510, 520, 530 and 540 is limited to four, but it is possible to connect 16 to 64 load devices according to the embodiment.

The electronic watt hour meter 100 measures the power consumption of the customer, and outputs a power pulse (WP, Walt Hour Pulse) and a demand time pulse (EOI, End Of Interval). Here, the demand time pulse (EOI) is defined as a 15 minute demand time pulse.

The direct load control device 200 supplies power to a plurality of load devices 510, 520, 530, 540 installed in the customer. Since the direct load control device 200 is provided with a load contact, a plurality of load devices 510, 520, 530, and 540 are connected to respective load contacts to receive power.

The plurality of load devices 510, 520, 530, and 540 may be powered off under the control of the direct load control device 200 so that the power devices such as a computer device, a lighting device, an elevator and the like are eliminated, It is desirable to connect a power device which can reduce the instantaneous power consumption much and do not affect the operation of the customer.

The direct load control device 200 receives the power amount pulse WP and the demand time pulse EOI from the electronic watt hour meter 100. Also, the direct load control apparatus 200 receives the target power - the maximum demand power for 15 minutes - from the monitoring unit 300.

The direct load control apparatus 200 calculates the reference power, the current power, and the predicted power by using the power pulse WP, the demand time pulse EOI, and the target power. Based on the calculated result, 530, and 540 so that the power consumption of the load devices 510, 520, 530, and 540 does not exceed the target power. The direct load control device 200 controls the power supplied to the load device by cutting off the power supplied to the load contact.

FIG. 1A is a diagram showing the definition of each power according to time.

The definition of the reference power, the current power, the predicted power, and the adjusted power will be described with reference to FIG. 1A.

The reference power (Pr) means the power at the time of current demand in the power having the shortest distance from 0 to the target power.

- The reference power is = (target power / time remaining in seconds) * Elapsed time (seconds)

Also, the current power (Pt) means the amount of power used up to the present after the start of demand.

- Current power = (composite denaturation ratio / pulse constant) * Accumulated pulse number * (60 / minute on demand)

- Synthetic denaturation ratio = CT (Current Transformer) ratio * PT (Potential Transformer) ratio

- Pulse constant = number of pulses output per kWh

In addition, the predicted power Q means the amount of power expected to be reached at the end of the demand time, using the amount of power change per unit time.

- Predicted power = current power + ((power change per unit time / unit time (minute)) * remaining demand time (minute))

The adjusted power U means the power required for the predicted power and the target power to coincide with each other when the demand is terminated.

- Adjusted power = ((predicted power - target power) / remaining demand time (minute)) *

Referring again to FIG. 1, the monitoring unit 300 and the direct load control device 200 are connected to each other through a wired line such as a serial communication line such as RS232C or an Ethernet line to exchange data.

The monitoring unit 300 may be configured as a personal computer or the like, and the monitoring unit 300 receives and displays the information calculated by the direct load control device 200. Also, the monitoring unit 300 can set the target power and can change the internal setting information of the direct load control device 200. [ Therefore, the manager of the customer can check the information calculated in the direct load control device 200 using the monitoring unit 300, and can control the contract power so as not to exceed the contract power by directly setting the target power.

The server 400 and the direct load control device 200 are connected to each other through a wired or wireless Internet network to exchange data. The server 400 receives the information calculated by the direct load control device 200 and directly controls the load control device 200 to adjust the power supplied to the plurality of load devices 510, 520, 530 and 540.

The server 400 refers to a management server of a power supply company, and the server 400 is connected to a plurality of direct load control devices of a plurality of customers, thereby directly managing the maximum demand power of each zone.

For example, in the afternoon of summer, if the electric power demand of the air conditioner suddenly increases, it may occur that the appropriate reserve electric power instantaneously decreases to a dangerous level. At this time, the server 400 directly controls the load control device 200 exceeding the maximum demand power while monitoring the direct load control device 200 of each zone in real time, and can compulsorily control the consumption of power below the maximum demand power have.

In addition, the server 400 controls not only the entire proper reserve power of all the zones but also the power consumption of the zone when the reserve power of the specific zone is reduced so as to maintain the appropriate spare power of each zone Can be adjusted directly, and the reserve power of the other zones can be adjusted to switch to that zone.

A more detailed operation of the load control system for adjusting the maximum demand power according to the embodiment of the present invention will be described below.

The direct load control device 200 includes a plurality of connection terminals 220, 230, 240, and 250 for connecting to an external device, and a display unit 210.

The first connection terminal 220 of the plurality of connection terminals 220, 230, 240 and 250 is for connecting to the electronic watt-hour meter 100 and includes a spare terminal for compatibly accommodating the electronic watt- have. The second connection terminal 230 is for connecting with the plurality of load devices 510, 520, 530, 540, and may be a two-phase or three-phase connection terminal. The third connection terminal 240 is for connecting with the monitoring unit 300, and may include a serial communication and an Ethernet communication terminal. The fourth connection terminal 250 is for connecting with the server 400, and may be configured by an Ethernet communication terminal or a wireless communication module for connecting the wired Internet.

The display unit 210 may be a flat panel display module, and may be a flat panel display module employing a touch screen method so as to direct a command by a user's touch operation.

The display unit 210 of the direct load control device 200 collects and displays the voltage, current, active power, reactive power, apparent power, power factor, and 15-minute demand power of each load device of the plurality of load devices 510, 520, 530 and 540.

The direct load control apparatus 200 is also provided with a power control unit 200 for controlling the power control unit 200 and the load control unit 200 based on the power pulse and the demand time pulse, the target power, the reference power, the current power, the predicted power, Minute demand power to the server (400).

The server 400 directly controls each of the direct load control devices 200 so as to grasp the maximum demanded power in real time on the basis of the information transmitted from each of the direct load control devices and to maintain the appropriate reserve power. That is, the server 400 can selectively keep the power of the load device connected to the load control device 200, thereby keeping the maximum demand power within an appropriate range.

For reference, the direct load control device 200 may further include a plurality of display lamps (not shown) for displaying current power conditions.

That is, if the current power is equal to or higher than the reference power or the predicted power is equal to or higher than the target power, the first display lamp can be informed by lighting. In addition, when the power supplied to at least one load device is cut off, the second display lamp may be turned on to inform the user. Further, if all of the power supplied to the plurality of load devices is interrupted, the third display lamp may be turned on to inform.

When the load control device 200 is directly controlled by the server 400 - when the power supplied to all the load devices is shut off, the first to third display lamps may be configured to repeatedly flicker at 0.5 second intervals have.

Further, the current control state can be confirmed through the colors of the first to third display lamps. For example, when the first to third display lamps flash red at 0.5 second intervals, the power supplied to all load devices is blocked by the server 400, and the first to third display lamps are green The server 400 directly transmits a control signal for controlling the load control device 200. [0050]

The server 400 directly outputs the load control start time, the end time, the total control time, and the control time to the display unit 210 of the direct load control device 200 before adjusting the supply power of the load device connected to the direct load control device 200 And controls the direct load control device 200 according to whether the control is approved or not.

When the server 400 directly transmits the load control start time, the end time, the total control time, and the control purpose to the load control device 200, the corresponding information is displayed in the form of a pop-up window on the display unit 210, ) Are displayed in the same pop-up window. The control approval may be input through the touch screen of the display unit 210 or may be input by the monitoring unit 300.

On the other hand, as a result of calculation by the direct load control device 200, the difference between the adjusted power-predicted power and the target power is divided by the demand time. When the time exceeding +5 to 9% of the total value of the target power is less than 60 minutes , The server 400 can directly control the load control device 200 according to the user's approval of the control.

If the time when the adjusted power exceeds +10 to 15% of the total value of the target power is 60 minutes or more, the server 400 requests the control approval again even if the control approval is rejected, The direct load control device 200 can be controlled.

In addition, when the time when the adjusted power exceeds + 20% of the total value of the target power is 30 minutes or more, the server 400 can directly control the load control device 200 irrespective of whether the control is approved by the user. At this time, the server 400 may automatically apply a wait time of 30 minutes to 60 minutes in consideration of the appropriate reserve power, and then cut off the power after the wait time, so that the server 400 can prepare in advance.

On the other hand, a pop-up message indicating that blocking is proceeding is displayed on the display unit 210 of the direct load control device 200 immediately before the standby time cuts off the power. When the user continues to touch the pop-up message, Lt; RTI ID = 0.0 > additional < / RTI > When the pop-up message is subsequently displayed again, if the user is continuously touching the pop-up message, a second additional wait time of 5 minutes is given. When the pop-up message is subsequently displayed again, if the user is continuously touching the pop-up message, the third additional wait time for one minute is finally given. Each pop-up message displayed at each additional waiting time is randomly displayed at different positions on the display unit 210. [

The above-mentioned range of the target power and the exceeding time are examples of values recommended by the server 400, and may be automatically set by the server 400 or changed by an instruction value of the server 400. [ Basically, the monitoring unit 300 is preferably configured such that it can only confirm the corresponding value and can not directly change it. For reference, in order for the monitoring unit 300 to change the excess range and the excess time, the approval of the server 400 should be given priority.

The monitoring unit 300 is a device provided to monitor the load control device 200 directly by the administrator of the customer. The monitoring unit 300 not only displays the voltage, current, power factor, active power, reactive power and apparent power of each load device, but also displays the Internet IP address for connection between the load control device 200 and the server 400 , Socket number, and password input.

In addition, the monitoring unit 300 can adjust the power cutoff order by setting priorities of the plurality of load devices 510, 520, 530, For example, when the priority order is set in the order of the first load device 510, the second load device 520, the third load device 530, and the fourth load device 540, Lt; / RTI > Also, the power may be configured to be cut off in the order of higher priority according to the internal setting.

On the other hand, when setting the priority of the plurality of load devices 510, 520, 530, and 540, the administrator of the customer can select not to block the power of at least one load device. For example, when the power is configured to be cut off in order of decreasing priority, the first load device 510 and the second load device 520, which are set as the first and second priorities, And only the power of the third load device 530 and the fourth load device 540 can be blocked by the server 400. [

2 is a view showing a main screen of the display unit 210 of the direct load control apparatus 200 according to the present embodiment.

Referring to FIG. 2, the target power, the current power, the predicted power, and the reference power are graphically displayed on the left side of the main screen, and the power amount and the set value are displayed on the right side of the table. In addition, the maximum peak, control mode (automatic, manual), alarm status, time, etc. are displayed. In addition, the bar graph on the lower side shows the current state of the load. In the case of green light, the load is turned on. In the case of gray, the load is turned off.

3 is a view showing a setting screen of the display unit 210 of the direct load control device 200 according to the present embodiment.

3, the target power and load quantity, the PCT magnification, the pulse constant, the demand time, the control method (sequential, rank, complex), and the control mode can be set on the setting screen of the display unit 210. [

Fig. 4 is a diagram showing a first communication setting screen of the display unit of the direct load control apparatus according to the present embodiment, and Fig. 5 is a diagram showing a second communication setting screen of the display unit of the direct load control apparatus according to the present embodiment.

4 and 5, communication port setting for direct connection between the load control device 200 and the monitoring unit 300 on the first and second communication setting screens, An Internet IP address and a socket number for connection between the Internet 400 and the Internet 400 can be set.

6 is a view showing a login screen of the monitoring unit 300 according to the present embodiment.

Referring to FIG. 6, an IP address and a password for connection between the load control device 200 and the monitoring unit 300 can be directly set on the login screen.

7 is a diagram showing an information display screen of the monitoring unit 300 according to the present embodiment.

Referring to FIG. 7, the target power, current power, predicted power, reference power, peak value, load status, and the like can be confirmed on the information display screen. That is, the information calculated by the electronic watt-hour meter 100 can be simultaneously displayed on the information display screen of the monitoring unit 300. At this time, it is preferable that the monitoring unit 300 is configured to store the information and to print the information.

8 is a view showing a setting screen of the monitoring unit 300 according to the present embodiment.

Referring to FIG. 8, setting values such as a target power, a demand time, a control mode, an alarm condition, and a load quantity can be changed on the setting screen.

Here, if the target power is first entered as a number exceeding the contracted power, the change value is not applied immediately and is automatically corrected to the value corresponding to the contracted power.

Next, when the target power is input a second time with a value exceeding the contract power, the value is automatically corrected to a value corresponding to the contract power, and at the same time, the approval message of the change value is transmitted to the server 400.

Next, when the approval is received from the server 400, the approval is made in the form of a pop-up message in the monitoring unit 300, and it is automatically changed to the first numerically-contracted power excess value. As described above, only when the number exceeding the contracted power is inputted two or more times consecutively, an acknowledgment message is transmitted to the server 400, thereby reducing the transmission of irrelevant acknowledgment messages due to an error.

For reference, the acknowledgment message transmission can be configured only when the first input value and the second input value are the same, and the difference between the first input value and the second input value is 5% to 10% ≪ / RTI > the acknowledgment message transmission may be configured to occur.

9 is a view showing an inquiry screen of the monitoring unit 300 according to the present embodiment.

Referring to FIG. 9, the maximum peak power and the power consumption may be displayed in the form of a power usage report based on the information transmitted from the electronic watt-hour meter 100. At this time, a selection menu is displayed for selecting the daily report, monthly report, and yearly report form, and the past load history can be selected and confirmed.

10 is a view showing a load device inquiry screen of the monitoring unit 300 according to the present embodiment.

Referring to FIG. 10, the voltage, current, power factor, active power, reactive power, apparent power, and frequency of the load device selected on the load device inquiry screen can be confirmed. At this time, the last update time of each load device information is displayed at the same time.

11 is a view showing a load device setting screen of the monitoring unit 300 according to the present embodiment.

Referring to FIG. 11, the priority of the load device can be changed on the load device setting screen. The load device changes the power cutoff order according to the set priority, and the specific order may be set so that the power is not cut off.

The load control system for adjusting the maximum demanded power according to the embodiment of the present invention is a system in which the server 400 of the utility company checks in real time the contracted power of the customer and the instantaneous maximum power of the customer, So that a proper reserve ratio of the power can be secured easily.

When the target power is directly set in the load control device 200 in the customer, the power supplied to the plurality of load devices 510, 520, 530 and 540 is automatically adjusted so that the direct load control device 200 does not exceed the target power, It is possible to prevent excessive charging of the charge exceeding the contracted power and to perform systematic power management based on the power usage information recorded in the direct load control device 200. [

Thus, those skilled in the art will appreciate that the present invention may be embodied in other specific forms without departing from the spirit or essential characteristics thereof. It is therefore to be understood that the embodiments described above are to be considered in all respects only as illustrative and not restrictive. The scope of the present invention is defined by the appended claims rather than the detailed description and all changes or modifications derived from the meaning and scope of the claims and their equivalents are to be construed as being included within the scope of the present invention do.

100: Electronic watt hour meter
200: Direct load control device
210:
220, 230, 240, 250: connection terminal
300: Monitoring section
400: Server
510, 520, 530, 540:

Claims (7)

An electronic watt-hour meter for measuring the power consumption of the customer;
Current power and prediction using a power pulse and a demand time pulse transmitted from the electronic watt-hour meter and a predetermined target power-15 minutes maximum demand power, A direct load control device that calculates power and adjusts power supplied to the plurality of load devices so that the power consumption amount of the plurality of load devices does not exceed the target power based on the calculated result;
A monitoring unit configured to receive and display information calculated by the direct load control device and set the target power and change internal setting information of the direct load control device in exchanging data with the direct load control device; And
And a control unit for controlling the direct load control unit to control the power supplied to the plurality of load units so as to control the direct load control unit A server to adjust;
The server displays a load control start time, an end time, a total control time, and a control purpose on a display unit of the direct load control device as a pop-up window before adjusting power supplied to the load device connected to the direct load control device And controlling the direct load control device according to whether or not the control according to the touch of the pop-up window is approved,
The server divides the difference between the adjusted power-estimated power and the target power by the demand time. When the time exceeding +5 to 9% of the total value of the target power is less than 60 minutes, Control the device,
If the time when the adjusted power exceeds +10 to 15% of the total value of the target power is 60 minutes or more, the control approval is requested again even if the control approval is rejected, and then the direct load control device is controlled according to the control approval ,
The direct load control device controls the direct load control device regardless of whether or not the control is approved, and when the adjusted power exceeds + 20% or more of the total value of the target power is 30 minutes or more, The power is cut off after the waiting time,
A pop-up message is displayed on the display unit of the direct load control device immediately before the power is cut off after the standby time, but when the user continues to touch the pop-up message, a predetermined first additional wait time is given,
When a popup message displayed after the first additional waiting time is continuously touched, a predetermined second additional waiting time - a time shorter than the first additional waiting time - is given,
If a popup message displayed after the second additional waiting time is touched continuously, a predetermined third additional waiting time - shorter than the second additional waiting time - is given, And the pop-up message is randomly displayed at different positions of the display unit.
The method according to claim 1,
The direct load control device includes:
Current, active power, reactive power, apparent power, power factor, and 15-minute demand power of each load device of the plurality of load devices are collected and displayed on a built-in display unit,
Current power, reactive power, reactive power, apparent power, and 15-minute demand power of each load device to the server in accordance with the target power, target power, reference power, current power and predicted power, Features a load control system that regulates the maximum demand power.
The method according to claim 1,
The direct load control device includes:
The first display lamp is turned on when the current power is higher than the reference power or the predicted power is higher than the target power,
The second display lamp is turned on when power supplied to at least one load device is cut off,
And the third display lamp is turned on when all of the power supplied to the plurality of load devices is shut off.
The method according to claim 1,
The monitoring unit,
Wherein the controller is configured to set an Internet IP address, a socket number, and a password input for connection between the direct load controller and the server.
The method according to claim 1,
The monitoring unit,
Wherein the load control unit is configured to display voltage, current, power factor, active power, reactive power, and apparent power of each load device.
The method according to claim 1,
The monitoring unit,
Wherein the priority order of the plurality of load devices is set so as to adjust a power cutoff order.
delete

Images