KR101334231B1 - A measuring device providing its free attachment and detachment - Google Patents

Abstract

The present invention provides a detection module for measuring first data from an AC power source supplied through a power strip, a central processing module for calculating second data using the measured first data, and the first data and the second data. A measuring unit having a storage module in which data is stored; And a communication unit connected to a network with a rack environment management (REM) device and transmitting the first data and / or the second data to the REM device according to a communication protocol, and disconnection of an AC input supplied through a power strip. It relates to a measuring device that can be attached and detached on a power strip without. According to the present invention, it is possible to measure the value of the voltage, current, power factor, etc. supplied through the power strip in real time and can be attached and detached without power off, so that the user can easily replace the measuring device in case of failure, thereby providing convenience to the user. Can be.

Description

Detachable measuring device {A MEASURING DEVICE PROVIDING ITS FREE ATTACHMENT AND DETACHMENT}

The present invention relates to a detachable measuring device, and more particularly, by connecting a measuring unit and a communication unit incorporating a current transformer (CT) to a power strip capable of providing a power supply to each device. It relates to a measuring device that can measure and easy to replace and manage through detachment.

The Internet Data Center (IDC), which was created with the growth of the Internet business, refers to a place to provide services such as renting computer equipment or network equipment to business and individual customers, and attracting customers' facilities such as servers. IDC is equipped with state-of-the-art facilities, security, and perfect communication network for the operation and management of server equipment and communication equipment, which are burdensome for individual companies to operate.

This operation and management proceeds without an accident, and for accurate charging per power used in each equipment, data and temperature such as current, voltage, power, and power factor consumed in each rack must be measured and calculated in real time. It is necessary to prepare in advance for the accidents that may occur in the future and to charge accurately, but in the past, it is impossible to obtain real-time data on the load, which requires manual measurement whenever necessary or expensive products using separate programs are installed in the entire rack. There has been a problem that is not compatible because it must be used.

In addition, in the past, as shown in FIG. 1, a cable for connecting power is installed to cover the inside of the current transformer, and the current value measured through the current transformer is a REM (Rack Environment Management) device installed at a specific position through a high-cost communication cable. If the current situation or the REM device is far from the current transformer, the cable length becomes longer and the cost increases. Also, since the REM device must connect all the cables from the multiple current transformers installed over each RACK, As there are many connection terminals, the connection becomes complicated, and if a fault occurs in the current transformer, the IDC, which has to provide service 24 hours a day, is required because the power supplied through the cable winding the current transformer must be cut off in order to replace the current transformer. Problems with many difficulties in replacement This has been.

The present invention is to provide a measuring device that can be replaced on the power strip easily replace the failed equipment without power off.

The present invention is to provide a measuring device that can generate an alarm in the event of a power supply failure by setting a threshold value.

The present invention provides a measuring device that can obtain data such as current and voltage in real time even at low cost by using a general-purpose protocol when communicating with the outside.

SUMMARY OF THE INVENTION The present invention provides a measuring apparatus which saves cost by cascading and reducing the number of connections to a REM apparatus.

In order to achieve the above object, according to a preferred embodiment of the present invention, the detection module for measuring the first data from the AC power supplied through the power strip, and the second data using the measured first data A measuring unit having a central processing module for calculating a value and a storage module for storing the first data and the second data; And a communication unit connected to a network with a rack environment management (REM) device and transmitting the first data and / or the second data to the REM device according to a communication protocol, and disconnection of an AC input supplied through a power strip. A measuring device is provided that can be attached to and detached from the power strip without the need for a power strip.

The measurement unit of the present invention may further have a display module including display means for displaying the first data and / or the second data.

The display module may further include input means selectable to display at least one selected value of the first data and the second data on the display means.

In addition, the communication protocol is preferably the RS485 protocol.

Preferably, the measurement unit may further include an internal power supply for rectifying the AC power supplied through the power strip or supplying the internal power using a separate power source.

The first data may be any one or more of current, voltage, and frequency, and the second data may be one or more of power and power factor.

According to another aspect of the present invention, when the detection module for measuring the first data from the AC power supplied through the power strip, and calculates the second data using the measured first data and the set threshold value exists A central processing module configured to generate an alarm when the first data is out of a range of the threshold value and to generate an alarm; and display means for displaying one or more of the first data, the second data, and the threshold value. A measuring unit having a display module, and a storage module configured to store at least one of the first data, the second data, and the threshold value; And a communication unit connected to a network with a rack environment management (REM) device and communicating with the REM device by a communication protocol, and provided with a measuring device detachable on a power strip without disconnection of an AC input supplied through the power strip. do.

In the present invention, it is preferable that the alarm generates a flashing of the display means and / or an alarm sound.

In addition, the display module may further include input means selectable or changeable to set and change the threshold value or to display one or more selected values of the first data and the second data on the display means.

Preferably, the communication protocol may include a command code for an instruction or response to any one of the first data and the second data inquiry, threshold inquiry, threshold setting, and alarm setting and clearing.

The first data may be any one or more of current, voltage, and frequency, and the second data may be one or more of power and power factor.

The detection module may further include a temperature sensor, and the temperature measured by the temperature sensor is transmitted to the central processing module.

According to another aspect of the present invention, measuring the first data from the AC power supplied through the power strip and calculates the second data using the measured first data and one of the first data and the second data A measurement unit including display means capable of displaying an abnormality and storing one or more of the first data, the second data, and the threshold value; and a rack environment management (REM) device connected to a wired network and by a communication protocol. It includes a communication unit for communicating with the REM device, comprising a plurality of measuring devices that can be attached and detached on the power strip without interruption of the AC input supplied through the power strip, the network connection of the plurality of measuring devices and the REM device Through cascading between measuring devices, only one line is finally connected to the REM device. A metrology system is provided.

According to the present invention, it is possible to measure the value of the voltage, current, power factor, etc. supplied through the power strip in real time, and can be attached and detached without power off, there is an advantage that can easily replace the measuring device in case of failure.

In addition, according to the present invention has an advantage that it is easy to determine whether the abnormality by generating an alarm when the measured value by setting the threshold value is out of the range of the threshold value.

In addition, according to the present invention there is an advantage that can be reduced by the cascading process to reduce the number of connections to the REM device when building the system.

1 is a diagram of a conventional current transformer and a cable for transmitting measured values.
Figure 2 is a block diagram showing a measurement management system including a current measuring instrument built-in current transformer according to an embodiment of the present invention.
3 is a view showing a detailed configuration of the measurement unit according to an embodiment of the present invention.
4 is a view illustrating an appearance of a display module according to an exemplary embodiment of the present invention.
5 is a diagram illustrating a communication protocol between a communication unit and a REM device according to an embodiment of the present invention.
FIG. 6 is a diagram showing the types of command codes and DATA areas and their data structures in the communication protocol of FIG. 5; FIG.
FIG. 7 is a view illustrating a part in which a conventional current transformer and a cable are installed when a measuring device according to an embodiment of the present invention is installed. FIG.
FIG. 8 is a view illustrating a state in which a measurement device according to an embodiment of the present invention is attached to a power strip and a form in which the measurement unit and the communication unit of the measurement device are detached.

Hereinafter, embodiments of the present invention will be described in detail with reference to the accompanying drawings.

2 is a block diagram showing a measurement management system including a current measuring instrument with a current transformer according to an embodiment of the present invention. As shown in FIG. 2, the measurement management system includes the measurement apparatus 10, 10 ′, the rack environment management (REM) device 20, and the EMS of the present invention, which are configured by the measurement unit 100, 100 ′ and the communication unit 200, 200 ′. (Environment Management System) 30. In the measurement management system, a plurality of measuring devices 10 and 10 'and a REM device 20 may exist, and a plurality of measuring devices 10 and 10' may be collectively referred to as a measuring system.

Each of the measuring devices 10 and 10 'is composed of a measuring unit 100 and a communication unit 200, the measuring unit 100 is connected to a power strip for supplying power to the rack of the AC input supplied through the power strip It is configured to measure voltage, current and frequency, and calculate and display data on power, power factor, etc. using the measured values. In general, the power strip has a form of a multi-tap having a plurality of outlets, but is not limited to this type, and may include all devices that can supply power to external devices. In addition, the measurement unit 100 may be configured to measure and display the temperature through a connection with a temperature sensor installed at a specific position of the rack. Hereinafter, measured values such as voltage, current, frequency and temperature and calculated values such as power and power factor calculated using the measured values will be collectively referred to as measured values. When a change request of the measured value displayed on the measuring unit 100 is requested through a direct input or communication of the user through the measuring unit 100, the display of the requested measured value is enabled. All measured values are transmitted to the communication unit, and when a threshold value is set for current or voltage, an alarm indicating a dangerous situation is generated when a corresponding value among the measured values exceeds a set range from a set threshold value. In addition, the measurement unit 100 is detachably attached to the power strip to facilitate the removal and replacement of the failure, and can be manufactured so as not to cut off the power supplied through the power strip during removal and replacement.

The communication unit 200 transmits the measured value calculated and calculated through the measurement unit 100 through communication with the REM device 20 using a communication protocol, and also provides the measured value through communication with the REM device 20. Functions include setting and querying thresholds, setting and clearing alarms, and setting ID changes. The communication unit 200 and the REM device 20 are connected by a network, and the network may be a wired method through an unshilded twisted pair (UTP) cable or another cable, and may use infrared (IR) and Bluetooth, etc. It can also be built wirelessly. In one embodiment, when the connection between the communication unit 200 and the REM device 20 is connected by a UTP cable, the communication unit 200 of each of the measuring devices (10, 10 ') attached to a plurality of racks Outgoing UTP cable through cascading process, only one UTP cable can be finally connected to the REM device 20, thereby reducing the number of input terminals of the REM device 20. In addition, the communication between the communication unit 200 and the REM device 20 may be performed using a known communication protocol. For example, the RS485 protocol may be used. In addition, the communication unit 200 is also detachably attached to the power strip to facilitate the removal and replacement of the failure, it can be manufactured so as not to cut off the power supplied through the power strip during removal and replacement.

The measuring unit 100 and the communication unit 200 is independently manufactured, each of which can be detachably attached to the power strip and can be manufactured so as not to cut off the power supplied through the power strip, according to another embodiment of the measuring unit ( 100 and the communication unit 200 may be integrally configured so that the entire measurement device 10 including the measurement unit 100 and the communication unit 200 may be detached from the power strip.

The REM device 20 may be freely positioned, but is generally located at the bottom of the rack and receives a value of current, voltage, etc. measured in one or more racks located at or around each other, and is connected to a measurement device 10 connected to a network. Communicate according to the communication protocol with 10 '). In addition, the REM device 20 is wired or wirelessly connected to the EMS 30 and transmits the measured values transmitted from each of the measurement devices 10 and 10 'to the EMS 30 through communication according to a communication protocol. At the request of the EMS 30, it is possible to provide functions such as providing measured values, setting and querying thresholds, setting and releasing alarms, and changing IDs of measuring devices.

The EMS 30 is a system that allows the user to constantly monitor and monitor the current, power, temperature, etc. of the IDC server room to show the user the change of the measured values measured in each rack in real time. In addition, according to the user's input through the EMS (30), through the communication with each REM device 20, such as providing the measured value of the rack, threshold setting and inquiry, alarm setting and release, and setting the measurement device ID change, etc. Can function.

3 is a diagram illustrating a detailed configuration of the measurement unit 100 according to an embodiment of the present invention, in which the measurement unit 100 includes an internal power supply unit 110, a detection module 120, and a central processing module ( 130, the display module 140, and the storage module 150.

The internal power supply unit 110 may be configured to include an AC / DC converter to rectify the AC power coming into the power strip 40 to use as an internal power source, according to another embodiment of the invention the power of the power strip to the internal power source It may be configured to provide a separate internal power source, including a battery or the like without using it.

The detection module 120 is a module for measuring a value consumed after the power strip and is connected to an AC power source of the power strip for measurement, a voltage detector for measuring a voltage, a frequency detector for detecting a frequency of an AC input, and It includes a current detector for measuring the current through the built-in current transformer, the measured values are transmitted to the central processing module 130. The measured voltage and current may be an RMS value thereof. In addition, the detection module 120 may be connected to an external temperature sensor (not shown) to transmit the measured temperature to the central processing module 130.

The central processing module 130 collects the voltage, current, frequency, and temperature received from the measurement module 120, calculates power factor and power using the same, and stores these measured values in the storage module 150 as necessary. Can be. The power calculated here may be active power and the power factor may be calculated in terms of percentage (%). In addition, the central processing module 130 displays the measured value for which the user requests display to the display module 140 through the display module 140 or through the REM device 20 or the EMS 30. In response to a request from the REM device 20 through the communication unit 200, the user may transmit the measured value requested by the user to the REM device 20, and the user may display the display module 140, the REM device 20, or the like. When the threshold value is set or changed through the EMS 30, the threshold value may be stored in the storage module 150. The user may display the display module 140, the REM device 20, or the EMS 30. In case of requesting to set or cancel the alarm through the), the function of storing or setting the alarm is stored in the storage module 150, and the current stored in the storage module 150 is preset by the user when the alarm is set. Or a threshold of the voltage and the voltage received from the measurement module 120 and / or If outside the range of a preset threshold value by comparing the measured value of current may cause an alarm. In this case, the alarm may be performed in a visual or audible manner. As a specific example, an audible alarm sound through a buzzer or a visual alarm light through flashing of the display means in the display module 140 may be used. It may be. The alarm may be requested by the user through the display module 140, the REM device 20, or the EMS 30, and may be implemented to be cleared when the measured value of the voltage and / or current comes within a preset threshold. have.

The display module 140 includes display means for displaying the measured value transmitted from the central processing module 130, and as an example of the display means, a flexible numeric display (FND) may be used. The display module 140 may display current, voltage, power, temperature, or power factor values, which are measured values transmitted from the central processing module 130, according to a user's selection. Alternatively, the display module 140 may be configured to alternately display various measured values. have. In addition, the display module 140 may further include an input means that a user may input or select. In this case, the user may select a value to be displayed through the input means and set a threshold for a current or voltage. Alternatively, you can change the settings, as well as set alarms, cancel and clear alarms. A specific implementation method for the user requesting a command may be variously performed according to the type of input means included in the display module 140 and the user's convenience, and one embodiment thereof will be described in detail with reference to FIG. 4. do. When the user inputs through the input means, the input content is determined by the central processing module 130, and in the case of displaying a specific measured value, the display module 140 processes the displayed measured value to be displayed, and the threshold value. In the case of setting or changing the value, the new threshold value is stored in the storage module 150 or the previously stored threshold value is changed to the newly input threshold value. When the threshold value is set or changed, the central processing module 130 sets the value. Or compare the measured threshold and the measured voltage and / or current. In addition, when the content input by the user is to set or release the alarm, the central processing module 130 sets or releases the alarm setting state stored in the storage module 150 according to the user's input, and when the alarm is operating, the user When the content input by the user is the cancellation of the alarm, the central processing module 130 may cancel the alarm by stopping the operation of the display means and / or the buzzer of the display module 140.

The storage module 150 is used by the central processing module 130 and may store measured or calculated current, voltage, frequency, temperature, power or power factor values, and the user may set the threshold value of the voltage or current, It saves the value when changing and saves the alarm setting status when the user inputs for the alarm setting status.

4 is a view illustrating an appearance of the display module 140 according to an exemplary embodiment of the present invention, and the display method and the operation method thereof will be described in detail with reference to FIG. 4.

Basically, when the current measured value is 0.0A, the voltage measured value may be displayed on the FND of the display module 140 when the current measured value exists.

In addition, it is possible to change the display of measurement items on the FND. For example, when the ▲ (KW) button is pressed briefly, the letter P indicating power is displayed for a short time, and then the power measurement value is displayed, and the ▼ (A) button If you press shortly, letter A indicating current is displayed for a short time and then the current measurement value is displayed.If you press the SET (V) button shortly, letter V is displayed for a short time and voltage measurement value is displayed. ▲ If you press the (KW) button and the ▼ (A) button at the same time, you can display the power factor value after displaying the letter PF indicating the power factor for a short time.

A specific example of setting the threshold is as follows. Press the ▼ (A) button or the SET (V) button to change the measurement item to current or voltage, then press and hold the SET (V) button to enter the threshold setting mode for overcurrent or overvoltage. If there is a previously set threshold value, AH indicating overcurrent or VH indicating overvoltage is displayed for a short time, and then the preset threshold is indicated and changed through ▲ (KW) button and ▼ (A) button. If there is no previously set threshold value, the user may inform the user by blinking a dot and input a new threshold value through the ▲ (KW) button and the ▼ (A) button.

In the threshold setting mode for overcurrent or overvoltage, press and hold the SET (V) button once again to complete the threshold setting for overcurrent or overvoltage, and then enter the threshold setting mode for undercurrent or undervoltage. If there is a previously set threshold value, AL or low voltage VL indicating low current is displayed for a short time, and the previously stored threshold value is indicated and changed through ▲ (KW) button and ▼ (A) button. If there is no previously set threshold value, the user may inform the user by blinking a dot and input a new threshold value through the ▲ (KW) button and the ▼ (A) button.

When the threshold value is input through the ▲ (KW) button and the ▼ (A) button, the value changed according to the time the button is pressed can be changed. For example, when the ▲ (KW) button and the ▼ (A) button are pressed briefly, the current changes in 0.1 A units, the voltage changes in 1 V units, and when the button is pressed long, the current changes in 1 A units and the voltage changes in 10 V units. Can be designed to

After entering or changing the threshold, briefly press SET (V) to finally store the entered or changed threshold. In this case, the threshold value is stored in the storage module 150, and the display module 140 may display the measured value of the last selected measurement item before the threshold value input.

When the upper limit (overcurrent or overvoltage) and the lower limit (low current or low voltage) of the threshold value are determined by the above procedure, the measured value is compared with the voltage or current value measured in the central processing module 130. Compare whether it is out of the upper and lower limits.

In order to be able to cancel the threshold setting of current or voltage during the threshold setting mode, if 10 seconds have elapsed without pressing any button in the threshold setting mode, the procedure so far is canceled and the measurement of the most recently selected measurement item is performed. You can have the value displayed.

5 is a diagram illustrating a communication protocol between the communication unit 200 and the REM device 20 according to an embodiment of the present invention.

The overall configuration of the communication protocol using the RS485 protocol consists of a start code of 1 byte in length, a destination ID of 1 byte or 2 bytes in length, a source ID of 2 bytes or 1 byte in length, and a command code of 1 byte in length. It consists of a 4-byte header, a DATA area whose length varies depending on the type of command code, a CRC with a 2-byte length used for error checking, and a termination code with a 1-byte length.

As the start code is 0x15, upon receiving the corresponding byte, the communication unit 200 or the REM device 20 may determine that data is to be received.

The source ID is an ASCII code value corresponding to the ID of the transmitting side, the destination ID is an ASCII code value corresponding to the ID of the receiving side, the ID of the REM device 20 is assigned 1 byte, and the communication unit 200 is assigned. 2 bytes are allocated to the ID of the measuring device 10 including the N-M. For example, the REM device 20 may have 15 IDs of 1 to 15, and the measuring device 10 may have 255 IDs of 1 to 255. have. Looking at the configuration of the source ID or destination ID, the first value can be defined as MSB (Most Significant Byte), in which case the two-byte configuration corresponds to "1", "A" if the ID is 26 (0x1A) ASCII code values 0x31 ("1") and 0x65 ("A") are transmitted.

CRC is the sum of each byte from the destination ID to the DATA area. For example, when the value is 26 (0x1A), 0x31 ("1") and 0x65 ("A") are delivered. Comparing the CRC value received when receiving data from the communication unit 200 or the REM device 20 by adding each byte from the destination ID to the DATA area, confirming that all data arrived well without losing data in the middle. If it does not match the CRC value, it may be determined that an error and necessary actions such as a retransmission request.

The end code means the end of data transmission and the value is 0x03. Upon receiving the corresponding byte, the communication unit 200 or the REM device 20 may determine that data reception is completed.

The command code is a part representing each command. The byte length of the DATA area changes according to the type of the command. Examples of the specific command code and DATA area will be described in detail with reference to FIG. 6.

FIG. 6 is a diagram showing the types of command codes and DATA areas and their data structures in the communication protocol of FIG.

If the command code is ASCII code "1" (0x31), it can mean the command to search the measured value and cancel the alarm. In that case, the length of the DATA area is 2 bytes. If there is an alarm clearing command that disables the alarm, the first byte of the DATA area sends "1" (0x31). If there is no clearing command, "0" (0x30) is sent and the other byte is reserved. When receiving measurement value inquiry and alarm clear command, the response is command code starts with "1" (0x31). The length of DATA area is 12 bytes in total, the first 3 bytes are measured voltage value, and the second 3 bytes are measured. The current value, the third two bytes are the calculated power factor value, the fourth three bytes are the calculated power value, and the last one byte is the alarm on or off. The DATA area is transmitted as an ASCII code and can be defined so that the first value of each byte is set to MSB. For example, if the voltage indicates 209 (0x0D1), ASCII of "0", "D", and "1" is in order. The code value is sent. If an alarm is set, the last byte of the DATA area can be defined to have a value of "1" (0x31), and if it is cleared, a value of "0" (0x30).

If the command code is ASCII code "2" (0x32), it can be defined to mean threshold inquiry. In that case, the length of DATA area is 2 bytes. All two bytes of the DATA area are reserved. If a threshold inquiry command is received, the response begins with the command code "2". The length of the DATA area is 12 bytes in total, the first 3 bytes of the threshold voltage value, the second 3 bytes of the threshold current value, and the third 3 bytes. Means power value and the last 3 bytes are reserved. The command code may be transmitted twice to transmit an upper limit and a lower limit of a threshold, and in another embodiment, a value may be set to mean an upper limit threshold, a lower limit threshold, or vice versa in the first 3 bytes and the second 3 bytes, respectively. In this case, a value indicating the voltage value or the current value may be specified in the spare area or the third 3 bytes. This DATA is transmitted in ASCII code and can be defined so that the first value of each byte is set to MSB. For example, when the set threshold voltage is 266 (0x10A), the "1", "0", and "A" The values are sent in sequence.

If the command code is ASCII code "3" (0x33), it can be defined to mean the threshold setting. In that case, the length of the DATA area is 9 bytes. The first 3 bytes of the DATA area indicate the threshold voltage value to be set, the second 3 bytes the threshold current value to be set, and the last 3 bytes the power value. The command code may be transmitted twice to transmit an upper limit and a lower limit of a threshold, and in another embodiment, a value may be set to mean an upper limit threshold, a lower limit threshold, or vice versa in the first 3 bytes and the second 3 bytes, respectively. In this case, a value indicating whether a voltage value or a current value may be specified in the third 3 bytes. This DATA is transmitted in ASCII code and can be defined so that the first value of each byte is set to MSB. For example, when the threshold voltage value is set to 266 (0x10A), "1", "0", "A" When the threshold setting command is received, the response begins with the command code "3". The length of the DATA area is 9 bytes in total, the first 3 bytes are the set threshold voltage values, and the second 3 The byte returns the set threshold current value, and finally the power value. The command code may be transmitted twice to transmit an upper limit and a lower limit of a threshold, and in another embodiment, a value may be set to mean an upper limit threshold, a lower limit threshold, or vice versa in the first 3 bytes and the second 3 bytes, respectively. In this case, you can also specify a value that indicates whether it is a voltage value or a current value in the third 3 bytes, which is also transmitted in ASCII code and can be defined so that the first value of each byte is set to the MSB.

When the command code is ASCII code "B" (0x66), it can be defined to mean the ID change setting of the measurement device 10, in which case the length of the DATA area is 2 bytes. The DATA field indicates the ID to be changed in ASCII code. If the first value in each byte is MSB, for example, the ID to be changed is 66 (0x42), the values "4" and "2" are transmitted. The communication unit 200 receives this and changes and stores the ID of the measurement device 10, and there is no response to this command.

FIG. 7 is a view illustrating a part in which a current transformer is installed when a measuring device according to an embodiment of the present invention is installed. Compared with FIG. 1, since the current transformer is not connected, it is not necessary to turn off the power and remove the current transformer even in the case of failure, and the communication cable connected to the current transformer is also arranged to help reduce the cost.

FIG. 8 is a view illustrating a state in which a measurement device according to an embodiment of the present invention is attached to a power strip and a state in which the measurement unit and the communication unit of the measurement device are detached. In this way, it is possible to operate the server easily and continuously because the necessary part can be removed and replaced regardless of the operation of the server connected to the power provided through the power strip in case of failure of the measuring unit or communication unit. In addition, although not shown in the figure, since the UTP cable connected through the communication unit is cascaded, only one UTP cable is finally connected to the REM device, thereby reducing the complexity of the wiring and the cable cost.

The embodiments of the present invention described above are described for purposes of illustration, and those skilled in the art will be able to make various modifications, changes, and additions within the spirit and scope of the present invention. Should be considered to be within the scope of the following claims.

Claims (15)

A detection module for measuring first data from an AC power supplied through the power strip, a central processing module for calculating second data using the measured first data, and storing the first data and the second data A measuring unit having a storage module; And
It is connected to the network (Rack Environment Management) device REM and comprises a communication unit for transmitting the first data and / or the second data to the REM device by a communication protocol,
The network connection between the measurement unit and the REM device is a measuring device that is finally connected to the REM device through cascading processing and is detachable on a power strip without disconnection of an AC input supplied through the power strip.
The measuring device according to claim 1, wherein the measuring unit further comprises a display module including display means for displaying the first data and / or the second data.
The measuring device of claim 2, wherein the display module further comprises input means selectable to display, on the display means, at least one value selected from the first data and the second data.
The measuring device according to claim 1, wherein the communication protocol is an RS485 protocol.
The apparatus of claim 1, wherein the measurement unit further comprises an internal power supply unit rectifying the AC power supplied through the power strip or supplying the internal power using an additional power source.
The measuring device according to any one of claims 1 to 3, wherein the first data is any one or more of current, voltage, and frequency.
The measuring device according to any one of claims 1 to 3, wherein the second data is at least one of power and power factor.
A detection module for measuring first data from an AC power supplied through a power strip, and calculating the second data by using the measured first data, and when the threshold value is set, the first data is the threshold value. A display module including a central processing module for generating an alarm when the deviation is from a range of the range, a display means for displaying one or more of the first data, the second data, and the threshold value; A measuring unit having a storage module storing one or more of one data, the second data, and the threshold value; And
A measuring device connected to a network with a rack environment management (REM) device and including a communication unit communicating with the REM device by a communication protocol, and detachable on a power strip without disconnection of an AC input supplied through the power strip.
The measuring device according to claim 8, wherein the alarm generates a flashing of the display means and / or an alarm sound.
The display apparatus of claim 8, wherein the display module further comprises input means selectable or changeable to set and change the threshold value or to display one or more selected values of the first data and the second data on the display means. Measuring apparatus characterized in that
The communication protocol of claim 8, wherein the communication protocol includes a command code for an instruction or a response to any one of the first data and the second data inquiry, a threshold inquiry, a threshold setting, and an alarm setting and clearing. Measuring device.
The measuring device according to any one of claims 8 and 10 to 11, wherein the first data is any one or more of current, voltage, and frequency.
The measuring device according to any one of claims 8 to 10, wherein the second data is any one or more of power and power factor.
The measuring device of claim 8, wherein the detection module further includes a temperature sensor, and the temperature measured by the temperature sensor is transmitted to the central processing module.
Display means for measuring first data from an AC power supplied through a power strip, calculating second data using the measured first data, and displaying one or more of the first data and the second data; A measurement unit including and storing at least one of the first data, the second data, and a threshold value; and
A plurality of measuring devices connected to a wired network with a REM (Rack Environment Management) device and including a communication unit communicating with the REM device by a communication protocol, and detachable on a power strip without disconnection of an AC input supplied through the power strip. Equipped,
The network connection between the plurality of measuring devices and the REM device is characterized in that only one line is finally connected to the REM device through the cascading process between the measuring device.

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