Mitsubishi Electric EMU4-BD1A-MB User Manual
  1. Manuals
  2. Brands
  3. Mitsubishi Electric Manuals
  4. Measuring Instruments
  5. EMU4-BD1A-MB
  6. User manual

Mitsubishi Electric EMU4-BD1A-MB User Manual

Energy measuring unit
Hide thumbs Also See for EMU4-BD1A-MB:
Table of Contents

Advertisement

Quick Links

Download this manual
Energy Measuring Unit
MODEL
EMU4-BD1A-MB
EMU4-HD1A-MB
User's Manual
● Before operating the instrument, you should first read thoroughly this operation manual
for safe operation and optimized performance of the product.
Deliver this user's manual to the end user.

Advertisement

Table of Contents
loading
Need help?

Need help?

Do you have a question about the EMU4-BD1A-MB and is the answer not in the manual?

Questions and answers

Related Manuals for Mitsubishi Electric EMU4-BD1A-MB

Summary of Contents for Mitsubishi Electric EMU4-BD1A-MB

  • Page 1 Energy Measuring Unit MODEL EMU4-BD1A-MB EMU4-HD1A-MB User’s Manual ● Before operating the instrument, you should first read thoroughly this operation manual for safe operation and optimized performance of the product. Deliver this user’s manual to the end user.

  • Page 2: Safety Precautions

    Thank you for purchasing the energy measuring unit. This manual describes mounting method and usage for energy measuring unit EcoMonitorLight (Model： EMU4-BD1A-MB， EMU4-HD1A-MB). Before using the product, please read this manual carefully to ensure correct use. Make sure that the end users read this manual and then keep the manual in a safe place for future reference.
  • Page 3 Safety precautions ■Explanation of terms This instruction manual uses the following terms. Terms Description Refers to the current transformer. *"CT" is also included in the model’s name and phase wire system of split-type current sensors. Please be careful not to make a mistake. Current sensor This is a sensor that senses current.

  • Page 4: Features

    Features Features 【EMU4-BD1A-MB】 ● This energy measuring unit can measure various types of electric quantity such as voltage, current, electric power and electric energy. ● MODBUS RTU communication function (built-in) and various types of communication via an optional unit (sold separately) allow measurement data to be transmitted to a superior monitoring system, etc.

  • Page 5: Table Of Contents

    Table of Content Table of Content Safety precautions ..........................1 Features ..............................3 Table of Content ..........................4 Precautions for Use ........................6 Precautions for Operating Environment and Conditions ..........6 Installation and Wiring Precautions ..................7 Matters concerning the precaution before use ..............8 Precautions for Use .......................
  • Page 6 Table of Content 12.2 Specifications of MODBUS RTU communications ............ 116 12.3 External dimensions ....................... 117 12.4 Specifications of option devices(Split type current sensor) ........121 12.5 External dimensions of option devices ............... 123 Care ............................126 Storage ............................ 126 Maintenance ...........................

  • Page 7: Precautions For Use

    Precautions for Use 1. Precautions for Use In this instruction manual, the following safety alert symbols are used in the following meanings. Symbol Content Indicates that incorrect handling occurs hazardous conditions, resulting in death DANGER or severe injury. Indicates that incorrect handling may cause hazardous conditions, resulting in WARNING Severe injury.

  • Page 8: Installation And Wiring Precautions

    Precautions for Use Installation and Wiring Precautions Do not touch the live part such as the connection terminal while it is energized. DANGER Failure to do so may cause electric shock, a fire, a failure etc. ●Work under the electric outage condition. Do not do hot-line work. Failure to do so may cause electric shock, a fire, a failure etc.

  • Page 9: Matters Concerning The Precaution Before Use

    Precautions for Use ●Do not damage the outer circumference of the device. If there is damage on the outer circumference or terminals, the accuracy may be lost, and the life may be shortened due to the influence of dust, etc. Please handle with care. ●Do not apply a strong impact to the liquid crystal display.

  • Page 10: Precautions For Use

    Precautions for Use Precautions for Use ●Do not disassemble or modify this unit. It may cause electric shock, a fire, a failure, a malfunction etc. ●Do not touch the live part such as the connection terminal while it is energized. It may DANGER cause electric shock, a fire, a failure, a malfunction etc.

  • Page 11: Storage Precautions

    Precautions for Use Storage Precautions ●Please refer to “14. Storage” about storage. ●For long-time storage, avoid the following places. ・ Places the Ambient temperature exceeds the range -10℃ to +60°C. ・ Places the average daily temperature exceeds +35°C. ・ Places the Relative humidity exceeds the range 30% to 85% or places with dewfall. ・...

  • Page 12: Name And Quantity Of Package Contents

    Name and quantity of package contents 2. Name and quantity of package contents This following items for this device and included in package. Check that no items are missing. Item Quantity Specifications Main unit This image is EMU4-BD1A-MB. Before using the instrument...

  • Page 13: Option Devices

    Option devices 3. Option devices Option devices of this unit are showed below. (1) Option unit Sales with Product name Model Note unit B/NET Communication Unit You can use B/NET communication by EMU4-CM-B － for Energy Measuring Unit connecting main unit. CC-Link Communication Unit You can use CC-Link communication by EMU4-CM-C...
  • Page 14 Option devices (3) Accessory ①Split type current sensor Sales with Product name Model Note unit Split type current sensor EMU-CT5-A － (Connection with general EMU-CT50-A － wire type) EMU-CT100-A － EMU-CT250-A － EMU-CT400-A ○ Connect to this unit for general wire. EMU-CT600-A ○...

  • Page 15: Name And Function Of Each Part

    Name and function of each part 4. Name and function of each part 4.1 Name of each part Front view (Model：EMU4-BD1A-MB) ① Voltage input terminals (P1、P2、P3) ② Protective conductor terminal ( ③ Auxiliary power supply terminals (MA、MB) ④ LCD display ⑤...
  • Page 16 Name and function of each part Front view (Model：EMU4-HD1A-MB) ① Voltage input terminals (P1/P1、P2/P0、P3/P3、NC/P2) ② Protective conductor terminal ( ③ Auxiliary power supply terminals (MA、MB) ④ LCD display ⑤ Operation buttons (DISP/SET、+/PHASE、-/RESET) ⑥ Current input terminals (1k、1l、2k、2l、3k、3l) ⑦ MODBUS RTU communication terminals (485+、485-、SLD) ⑧...
  • Page 17 Name and function of each part Back view (Model： EMU4-BD1A-MB, Model： EMU4-HD1A-MB Common regardless of model.) ⑩ IEC rail fixture Name of each part Function ⑩ IEC rail fixture Fixing the device to the IEC rail.

  • Page 18: Functions Of Lcd

    Name and function of each part Functions of LCD ② Measured item ① Measured value ③ Option unit connection status ⑥ Measurement ⑤ Setting circuit number ④ Energy measurement Description Indicator Display measured values in digital numbers. ① Measured value Display measuring elements expressed in digital numbers.

  • Page 19: Operation Buttons

    Name and function of each part Operation buttons Operation buttons have many functions as below. For details, refer to each chapter. Meaning of symbols： ○(Press), □(Press more than 1 sec.), ◎(Press more than 2 sec.), ―(Press both at the same time) Operation Name of Button Event...

  • Page 20: Attaching And Removing

    Attaching and removing 5. Attaching and removing Mounting means have "on the IEC rail", “on JIS agreement type attachment” and "on the panel". ●Work under the electric outage condition. Do not do hot-line work. Failure to do so may WARNING cause electric shock, a fire, a failure etc.
  • Page 21 Attaching and removing ● Removing ②Pull the unit. ①Hold the unit and pull IEC rail fixture downward.

  • Page 22: Mounting On Jis Agreement Type Attachment

    Attaching and removing Mounting on JIS agreement type attachment When showing the display part by cutting the panel face in mounting the JIS agreement type attachment, cut the panel at where it is more than 50 mm away from the fulcrum of the open/close of the door. (Please refer to "5.3 Mounting on panel"...

  • Page 23: Mounting On Panel

    Attaching and removing Mounting on panel Panel cut dimensions are made larger than the product considering tolerance in panel cut. If you want to prevent dust and other intrusion the gap of panel cut, cut the panel according to the product to be mounted.
  • Page 24 Attaching and removing (3) When using the measuring unit and the attachment for panel mounting ● Dimensions of hole panel (76 mm × 44.5 mm) ● Mounting *The screws (mounting screws and screws for Outline of the measuring unit panel mounting attachment) are supplied with panel mounting attachment.

  • Page 25: Wiring

    Wiring 6. Wiring Do not touch the live part such as the connection terminal while it is energized. It may cause DANGER electric shock, a fire, a failure, a malfunction etc. ●Work under the electric outage condition. Do not do hot-line work. Failure to do so may cause electric shock, a fire, a failure etc.

  • Page 26: Example Of Wiring For Measuring Circuit

    Wiring Example of wiring for measuring circuit Example of wiring for this instrument is as follows. (EMU4-HD1A-MB is taken as an example.) For split type current sensors that can be used, refer to “3. Option devices". Also, when the simple measurement function is enabled, the circuit voltage is not connected to the instrument. Read this assuming that no circuit voltage is connected to the instrument.
  • Page 27 Wiring ●1P3W/3P3W(2CT)(For low voltage circuit) ●1P3W/3P3W(2CT)(For High voltage circuit) Fuse *1 *1： If UL/CE Marking/UKCA Marking compliant, a fuse is required. Below are the recommended fuses. Rated current: 0.5 A, Rated breaking capacity: 250 V AC 1,500 A / 250 V DC 1,500 A (a UL certified product) ●3P3W(3CT)(For low voltage circuit) ●3P3W(3CT)(For High voltage circuit) Fuse *1...
  • Page 28 Wiring ●3P4W(For low voltage circuit) ●3P4W(For High voltage circuit) *1： If UL/CE Marking/UKCA Marking compliant, a fuse is required. Below are the recommended fuses. Rated current: 0.5 A, Rated breaking capacity: 250 V AC 1,500 A / 250 V DC 1,500 A (a UL certified product)
  • Page 29 Wiring 6.1.1 Installation of split type current sensor Install the current sensor to the cable of the circuit to be measured by the following method. (１) EMU-CT5/CT50/CT100/CT250-A ■Procedure for wiring of current sensor ① Press the locking claw of the moving core, please open the moving core by removing the engagement (Figure 1).
  • Page 30 Wiring (2) EMU-CT400/CT600-A ■Procedure for wiring of current sensor ① Press the locking claw of the moving core, please open the moving core by removing the engagement (Figure 1). Before inserting the cable, check the symbols K and L to fit the current sensor in the correct direction.
  • Page 31 Wiring (3) EMU-CT50/CT100/CT250 ■Procedure for wiring of current sensor ① Open the moving core as shown in the right figure. Slowly lift the moving core locking claws on both sides of the moving core to open and remove them from the stoppers.
  • Page 32 Wiring (4) EMU2-CT5/EMU2-CT5-4W ■Procedure for wiring of current sensor ① Please let me slide a lock pin in the direction of an arrow. ② It lets an electric wire pass in a clamp, and close a clamp again. ③ Please hold a clamp in the fully close state with a finger, and push in until a lock pin is locked.
  • Page 33 Wiring 6.1.2 Secondary wiring of split type current sensor Notes on connection are also described in “1.2 Installation and Wiring Precautions", so please read them as well. ●The split type current sensor (dedicated cable type) has a sensor cable that do not use with the single-phase 2-wire system.
  • Page 34 Wiring (2) When extending EMU2-CT5-4W with a current sensor extension cable (standard type) and a current sensor extension (separate type). ① Remove the connector. 1side 3side 2side EMU2-CT5-4W EMU2-CB-Q5A-4W ② Connect the current sensor extension cable. 1side 3side EMU2-CB-T**M 2side EMU2-CT5-4W EMU2-CB-Q5A-4W Another does not use...

  • Page 35: Terminal Specifications, Applicable Wire

    (φ0.13 mm to 2.00 mm) Tightening torque － － Applicable solderless TGV TC-1.25-11T (by NICHIFU) TGV TC-1.25-11T (by NICHIFU) equivalent terminal equivalent *1 EMU4-HD1A-MB only. EMU4-BD1A-MB not used. Stripping length of the used wire has to be 8 to 9mm.

  • Page 36: Connection Of External Input / External Output

    Wiring Connection of external input / external output 6.3.1 How to connection In case using external input and/or external output, refer to the following. (1) External input ■For the case of contact input ■For the case of pulse input No-voltage a-contact / open collector No-voltage a-contact / open collector Voltage of the contact is 5 V DC, and current is Voltage of the contact is 5 V DC, and current is...
  • Page 37 Wiring 6.3.2 How to use for spring clamp terminal block ■Name of each part spring clamp terminal block (1) Connection of wire ■For stranded wires ①Press the push button with a flathead screwdriver at a 90° angle to the surface of the terminal block. ②Insert the wire into the insertion hole at a 90°...

  • Page 38: Connection Of Modbus Rtu Communication Cable

    Wiring Connection of MODBUS RTU communication cable 6.4.1 How to connection Maximum connectable device ： 31 device etc. MODBUS RTU(RS-485) *1 Termination resistances of 120 Ω Connect the termination resistances (120 Ω) to both ends of the devices connected the MODBUS transmission line.
  • Page 39 Wiring ■Connection with MELSEC Q series MODBUS module (QJ71MB91, QJ71C24N) MODBUS EMU4-BD1A-MB EMU4-BD1A-MB EMU4-BD1A-MB module EMU4-HD1A-MB EMU4-HD1A-MB EMU4-HD1A-MB (QJ71MB91) 485+ 485+ 485+ 485- 485- 485- Termination Termination resistor resistor 110Ω 1/2W Note: Connect 110 Ω termination resistors on the MODBUS module (QJ71MB91, QJ71C24N) side.
  • Page 40 Wiring ■Connection with MELSEC iQ-R Serial Communication Module (RJ71C24, RJ71C24-R2, RJ71C24-R4) Serial EMU4-BD1A-MB EMU4-BD1A-MB EMU4-BD1A-MB Communication module EMU4-HD1A-MB EMU4-HD1A-MB EMU4-HD1A-MB (RJ71C24) 485+ 485+ 485+ 485- 485- 485- Termination Termination resistor resistor 110Ω 1/2W Note: Connect 110 Ω termination resistors on the MELSEC iQ-R programmable controller side.

  • Page 41: Operating Mode

    Operating mode 7. Operating mode This unit has the operating modes. Switch these modes according to the purposes. The operating mode is displayed immediately after the auxiliary power loading. Mode Function Reference Display measured value digitally. It can display the condition of contact Operating mode input (*1) and present time (*2) other than the present value of the Chapter 9.2...

  • Page 42: Setting Method

    Setting method 8. Setting method Do not touch the live part such as the connection terminal while it is energized. Failure to do DANGER so may cause electric shock, a fire, a failure etc. If an abnormal sound, bad-smelling smoke, fever break out from this unit, switch it off promptly WARNING and do not use it.

  • Page 43: Procedures For Setting

    Setting method Procedures for setting Set items such as phase wire system, primary voltage, and primary current in the setting mode to measure and monitor. Under normal use, it shall be sufficient to set the setting menu 1 (Basic setting) only. For details, refer to after the following page.
  • Page 44 Setting method Setting mode or confirmation mode Operating ② mode Setting menu 1 Setting menu 2 Measurement Basic setting Communication setting display End of setting menu ② ② ② ① ③ ③ Setting item list Setting item list ④ Automatic detection MODBUS of phase wire system address...
  • Page 45 Setting method Setting mode or confirmation mode ② Setting menu 3 Setting menu 4 Setting menu 5 Setting menu 6 Input/output setting Alarm setting Logging setting Test mode ② ② ② ② ③ ③ *2 ③ *3 Setting item list Setting item list Setting item list Use or non-use of...

  • Page 46: Setting Menu 1 : Phase Wire System, Primary Voltage, Sensor Type

    Setting method Setting menu 1 : Phase wire system, primary voltage, sensor type, primary current, demand time, etc. In this menu, set phase wire system, primary voltage, sensor type, primary current, demand time, etc. In operating mode, press both [DISP/SET] and [+/PHASE] at the same time for more than two seconds to transition to setting mode and enable the following operations.
  • Page 47 ・ EMU4-HD1A-MB： Transition to “(5)Primary voltage (Direct)”. ●For other phase wire system： Transition to “(4)Use or non-use of VT”. *When single-phase three-wire system is selected for EMU4-BD1A-MB, “(4) Use or non-use of VT” is set to no, “(5) Primary voltage (direct)” is set to 110 V/ 220 V.
  • Page 48 If automatic detection is being performed by “(1)automatic detection of phase wire system and voltage”, the set value is displayed. ●For EMU4-BD1A-MB: 110 V ⇔ 220 V ●For EMU4-HD1A-MB: The setting range differs depending on the setting of "(2) Phase wire system".
  • Page 49 Setting method Setting of special primary voltage The setting range differs depending on the setting of Set according to the "(2) Phase wire system". following conditions according to the phase ●In case of Three-phase 3-wire, Single-phase 2-wire: wire system. Setting range: 1 V to 110000 V ・Single-phase 2-wire：...
  • Page 50 Setting method Set the primary current of combined split type current sensor. (10) Primary current (Direct sensor) 50 A 100 A 250 A 400 A 600 A After you choose the value, transition to “(13) Current demand time”. DISP/SET Set the primary current of combined CT (Current transformer). 30 A 200 A 1200 A...
  • Page 51 Setting method Set the current demand time. On setting display, “s” means “second” and “M” means “minute”. (13) Current demand 40 s 11 M 15 M time 10 s 50 s 12 M 20 M 20 s 13 M 25 M 30 s 10 M 14 M...
  • Page 52 Setting method Set the power factor value in the simple measurement. Setting range： -0.1 to -99.9, 100.0 to 0.0 Default value： 100.0 (16) Simple measurement ■Setting operation (Power factor) ①Set the blinking part in the order of the sign and the numerical value (the numerical value is from the upper digit).

  • Page 53: Setting Menu 2 : Modbus Rtu Communication

    Setting method Setting menu 2 : MODBUS RTU communication In this menu, set address, baud rate, parity and stop bit for MODBUS RTU communication. In operating mode, press both [DISP/SET] and [+/PHASE] at the same time for more than two seconds to transition to setting mode and enable the following operations.
  • Page 54 Setting method Set the stop bit for MODBUS RTU. 1 ⇔ 2 (4) MODBUS stop bit DISP/SET Setting menu Complete the setting or continue in other menu according to procedures for setting. For procedures for setting, refer to “8.1 Procedures for setting”.

  • Page 55: Setting Menu 3 : External Input/Output, Electric Energy Converted Value

    The underlined values each setting value are the defaults. Setting menu Choose the setting menu 3. ●For EMU4-BD1A-MB: ⇒ Choose “3“ and press [DISP/SET] to transition to “(13) Operating time indication”. ●For EMU4-HD1A-MB: ⇒...
  • Page 56 Setting method Set the unit amount pulse converted value. (3) Pulse converted value unit pcs: piece s:sec m:min h:hour After you choose the value, transition to “(5) Use or non-use of external output”. DISP/SET Set the reset method of contact input. Auto ⇔...
  • Page 57 Setting method Set when you set 2 circuits measuring effective. (6) The object of external Set the circuit to which the pulse output is performed. output circuit [1]： 1st circuit ⇔ [2]： 2nd circuit DISP/SET Set the unit amount per pulse of pulse output. The pulse output unit changes as follows by the full load power.
  • Page 58 Setting method Set whether the electric energy converted value is indicated or not. (8) Electric energy The electric energy conversion value is displayed by multiplying the electric energy converted value (incoming) by the electric energy conversion factor and integrating it. indication ⇔...
  • Page 59 (13) Operating time ⇔ indication (Do not indicate) (Indicate) ●For EMU4-BD1A-MB. ・You choose “oFF”： Transition to “(16) Backlight dimming”. ・You choose “on”： Transition to “(15) Operating time”. ●For EMU4-HD1A-MB. ・You choose “oFF”： Transition to “(16) Backlight dimming”. ・You choose “on”： Transition to the setting below.
  • Page 60 Setting method Set the Operating time unit (15) Operating time unit h: hour m: min s: sec *If “(3) 2 circuits measurement function availability” is set to "yES", set each circuit. Set the first circuit ([1] is displayed at the bottom left of the screen) and the second circuit ([2] is displayed at the bottom left of the screen) in order.

  • Page 61: Setting Menu 4 : Waveform Band Monitoring, Upper / Lower Limit Alarm, Etc

    Setting menu Choose the setting menu 4. ●For EMU4-BD1A-MB： Transition to “(8) Use or non-use of upper / lower limit alarm“. ●For EMU4-HD1A-MB： Transition to “(1) Use or non-use of waveform band monitoring“.
  • Page 62 Setting method Set the sampling cycle of waveform band monitoring. (3) Sampling cycle 250 ms 500 ms 1250 ms 2500 ms 5000 ms DISP/SET Set the width of the band. (4) Band width factor If you choose a large value, the band width will be wider. Setting range：...
  • Page 63 Setting method Set the alarm reset method when an alarm occurs with waveform band monitoring. (7) Waveform band Auto ⇔ HoLd monitoring alarm reset method Reset method Summery (For details, refer to “9.3.2”.) (Setting value) Reset the alarm automatically when alarm occurring condition Auto-reset is gone.
  • Page 64 Setting method Set the upper / lower limit alarm values. Setting range is as follows: Measurement Setting range Threshold Unit element DA upper limit 0% to 100% Primary current × DA(N) upper limit Setting value DA lower limit 0% to 100% Ｖ(Ｌ-Ｌ) upper limit 0% to 136% V(L-N) upper limit...
  • Page 65 Setting method Set the delay time from fulfilling the upper / lower limit alarm occurring condition. In setting display, “s” means “second” and “M” means “minute”. *Set the alarm delay time if you want to avoid the alarm caused by such as instant overload and noise.
  • Page 66 Setting method Setting menu Complete the setting or continue in other menu according to procedures for setting. For procedures for setting, refer to “8.1 Procedures for setting”.

  • Page 67: Setting Menu 5: Setting Related To Logging Unit

    Setting method Setting menu 5: Setting related to logging unit In this menu, set the logging unit ID or logging data clear. In operating mode, press both [DISP/SET] and [+/PHASE] at the same time for more than two seconds to transition to setting mode and enable the following operations.

  • Page 68: Initialization Of Related Items By Change Of Setting

    Setting method Initialization of related items by change of setting The following operation will change the corresponding settings, the accumulated values, maximum values and minimum values to the default values. ■To be changed the setting values and the reference waveform. Changed setting value Menu 1 Menu 3...
  • Page 69 Setting method ■To be changed the accumulated values, maximum values and minimum values. Changed setting value Menu 1 Menu 3 Menu 4 Setting item Periodic electric energy ○ ○ Pulse count value ○ Pulse converted value Operating time ○ ○ Operating time(CH2) ○...

  • Page 70: Other Setting

    Setting method Other setting Explain the setting operation other than the setting mode. 8.8.1 Preset and all data reset (Reset/Preset mode) It is possible to zero clear or preset the integrated value of each measured value (electric energy, operating time, etc.).
  • Page 71 Setting method ■All data reset Zero clear the following measurement items (integrated value, maximum value, minimum value). Electric energy (incoming), Reactive energy, Electric energy (transmission), Periodic electric energy, Electric energy converted value, Pulse count value, Integrated value Pulse converted value, Operation time, Alarm cumulative time, Band alarm count, Band cycle count Current demand, Voltage, Electric power demand, Power factor, Current unbalance rate, Maximum value...
  • Page 72 Setting method 8.8.2 Clock setting and logging data clear When connecting logging unit, you can set the clock of it. On the date indication in operating mode, press both [+/PHASE] and [-/RESET] at the same time for more than two seconds to transition to clock setting and enable the following operations.
  • Page 73 Setting method Set “Hour” in the clock. (4) Clock setting (Hour) Press [+/PHASE] or [-/RESET] to choose the value. Setting range： 00 to 23 DISP/SET Set “Minute” in the clock. (5) Clock setting ( Minute Press [+/PHASE] or [-/RESET] to choose the value. Setting range：...
  • Page 74 Setting method 8.8.3 Change of date format In date format setting, you can choose from “YY.MM.DD”, “MM.DD.YY” or “DD.MM.YY” format. On the date indication in operating mode, press [+/PHASE] for more than two seconds to transition to date format setting and enable the following operations. *The date is not indicated in operating mode when the logging unit is not connected.

  • Page 75: Operation

    WARNING and do not use it. Measurement functions 9.1.1 Measurement items The measurement items of this unit are shown in the table below. EMU4-HD1A-MB Support range EMU4-BD1A-MB Measurement items of circuit 1P2W 1P3W 3P3W 3P4W Electric energy (incoming) Present ●...
  • Page 76 Operation EMU4-HD1A-MB Support range EMU4-BD1A-MB Measurement items of circuit 1P2W 1P3W 3P3W 3P4W Electric power Present ● ● ● ● Present ● ● ● ● Electric power demand Max, Min ● ● ● ● Reactive power Present ● ● ●...
  • Page 77 Operation The details of measurement items showed below table. Measurement Details elements Details of the sign is showed below figure. Electric power Reactive power Power factor Calculated depending on the phase-wire system. Phase-wire system Calculating formula Single-phase 2-wire phase 1 current Single-phase 3-wire, Current total value (phase 1 current ＋...
  • Page 78 Operation Measurement Details elements Measured when the upper/lower limit alarm is enabled. Measures the time during which the upper/lower limit alarm is occurring. Integration is performed every measurement cycle (250ms), and 1 count indicates Alarm cumulative 250ms. time （For details, refer to Chapter 9.3.1 “Measurement of alarm cumulative time”.）...
  • Page 79 Operation ■Measurement items that can be monitored by communication/logging The measurement items that can be monitored by communication and logging are as follows. For details on the measurement items that can be monitored, refer to the programming manual for each communication, the MODBUS I/F specifications, and the logging unit instruction manual.
  • Page 80 Operation 9.1.2 Restrictions of measured data Measurement and communication are not performed in a few seconds (about 10seconds) after the power loading to this unit. Measurement and communication are not performed in a few seconds after the configuration or the change of the rating to it.
  • Page 81 Operation 9.1.3 2 circuits Measuring function This is a function that can measure only two circuits of the single-phase two-wire system (between 1-N and between 3-N), which are branched from the single-phase three-wire system, together. To enable this function, set the following values in "8.2 Setting menu 1: Setting of phase wire system, primary voltage, sensor type, primary current, demand time limit, etc."...
  • Page 82 Operation 9.1.4 Simple measurement function This function enables simple power measurement without voltage input. Each measurement elements calculated by the voltage and power factor and input current. Measurement resolution is not guarantee. To enable this function, set the following values in "8.2 Setting menu 1: Setting of phase wire system, primary voltage, sensor type, primary current, demand time limit, etc."...

  • Page 83: Display Function(Operating Mode)

    Operation Display function(Operating mode) This unit indicates the measured value of each item in operating mode. (For the measured items which can be indicated, refer to “9.2.1 Change the measured item”.) Operation procedure to change the screen indicated is as follows: Action Operation Details...
  • Page 84 － Reactive power kvar － － Mvar For EMU4-BD1A-MB, it will not be displayed. Apparent power If you do not set phase wire system 3P4W, it will not be displayed. － In case you set the simple measurement effective, Power factor it will not be displayed.
  • Page 85 In case you set the simple measurement effective, Frequency it will not be displayed. － For EMU4-BD1A-MB, it will not be displayed. RMS value of harmonic current In case you set the harmonic current indication invalid, it will not be displayed.
  • Page 86 Example of display In case you set the simple measurement effective, Electric energy (Transmission) it will not be displayed. － For EMU4-BD1A-MB, it will not be displayed. Periodic electric energy Not displayed if the external input is other than contact input. －...
  • Page 87 Alarm cumulative time invalid, it will not be displayed. － － For EMU4-BD1A-MB, it will not be displayed. In case you set the waveform band monitoring Band out rate invalid, it will not be displayed. In case you set the 2 circuits measuring function...
  • Page 88 Operation 9.2.2 Change phase Measured items Display order For Single-phase 2-wire Phase 1 → Total → ・・・ For Single-phase 3-wire, Three-phase 3-wire Current Phase 1 → Phase 2 → Phase 3 → Total → ・・・ For Three-phase 4-wire Phase 1 → Phase 2 → Phase 3 → Phase N → Total → ・・・ For Single-phase 2-wire No change for phase (only phase 1 displayed.).
  • Page 89 Operation 9.2.3 Measured item indication in operating mode ■The indication format of electric energy, reactive energy and periodic electric energy. It is as follows depending on the full load power. α： 1 Single-phase 2-wire 2 Single-phase 3-wire α×(Primary voltage) × (Primary current) Full load power [ kW ] = √...
  • Page 90 Operation ■The indication format of electric power, electric power demand, reactive power and apparent power. It is as follows depending on the full load power. (For procedures for the full load power, refer to “The indication format of electric energy, reactive energy and periodic electric energy”.) Indication format Full load power [kW]...
  • Page 91 Operation ■The indication format of electric energy (converted value). It is shown in the table below depending on the electric energy converted unit and the full load power. (For procedures for the full load power, refer to “The indication format of electric energy, reactive energy and periodic electric energy”.) Significant digits are the lower 6 digits.
  • Page 92 Operation ③When the unit of electric energy converted value is set to other units. Indication format Full load power [kW] Supplement Digital indication Unit less than 12 8888.88 12 or more and less than 120 88888.8 120 or more and less than 1200 888888 Indicator “K”...
  • Page 93 Operation ■The indication format of pulse converted value. It is as follows depending on the pulse converted unit and the pulse converted rate. The effective number is the last 6 digits. To indicate pulse converted value, the indication setting of external pulse input is needed in advance. ①When the unit of pulse converted value is set to MWh, kl, or t.
  • Page 94 Operation ■The indication format of operating time. To indicate operating time, the indication setting of them is needed in advance. Indication format Digital indication Unit hour 8888.88 ■The indication format of current unbalance rate and voltage unbalance rate. Indication format Digital indication Unit 8888.88...

  • Page 95: Monitoring Function

    Alarm will occur when the measured value exceeds the upper limit alarm value or below the lower limit alarm value. ■Monitoring elements This instrument can set the upper/lower limit alarm value for each measured value individually. Monitoring elements EMU4-BD1A-MB EMU4-HD1A-MB Current demand upper limit alarm ●...
  • Page 96 Operation ■Alarm occurrence / recovery condition Alarm reset Monitoring Alarm Measured items Alarm occurrence / recovery condition method items status Measured value > Upper limit alarm value Occurrence Upper limit (Alarm delay time is available) monitoring Recovery Measured value ≦ Upper limit alarm value Auto-reset (Auto) Measured value <...
  • Page 97 Operation ■Examples of alarm occurring (except for the upper limit of pulse conversion value) (1) When the alarm reset method is “Auto-reset (Auto)”. (2) When the alarm reset method is “Self-retention (HoLd)”. ■Alarm reset operation method The method of resetting the alarm differs depending on the setting of the alarm reset method. Alarm reset method Alarm recovery operation Reset the alarm automatically if the measured value goes below the upper limit or...
  • Page 98 Operation ■Measurement of alarm cumulative time Alarm cumulative time measures the time during alarm occurrence. It does not count during alarm delay time or self- retention.
  • Page 99 Operation 9.3.2 Waveform band monitoring function *It is a function that can only be used by EMU4-HD1A-MB. Waveform band monitoring function is a function to monitor the load current of the facilities. When measuring the load current of "equipment that repeats the same operation" as shown in the figure below, the load current for each operation has the same value and waveform(*).
  • Page 100 Operation This instrument performs the waveform band monitoring function as follows. ■Waveform measurement method and anomaly detection This instrument recognizes the waveform from the contact input and waveform data (load current value). It recognizes the start/stop of equipment operation (beginning/end of waveform) by ON/OFF of contact input. While the contact input is ON, the waveform data is measured at intervals of the Sampling cycle (set value).
  • Page 101 Operation ■Bandwidth determination method This instrument determines the band from the reference waveform. Bands are calculated with the following formula: Band = Reference waveform ± (Bandwidth factor (setting value) × Ｓｔａｎｄａｒｄ deviation） Load current Bandwidth Band Reference waveform Time The reference waveform is generated from the waveform of the load current. Acquire waveforms for 10 cycles, and the average value becomes the reference waveform.
  • Page 102 Operation ■Alarm reset method and operation method Depending on the alarm reset method, the screen display and whether or not the alarm reset operation is performed will differ. Alarm reset method Alarm recovery operation The alarm is automatically reset when the Band out rate falls below Auto-reset (Auto) the threshold.
  • Page 103 Operation ■Waveform band monitoring operation method (１) Setting the reference waveform and waveform band monitoring Set the parameters for generating the reference waveform and the items required for monitoring. For the setting, refer to "8.5 Setting Menu 4: Setting Waveform band monitoring, upper / lower limit alarm, etc.".
  • Page 104 Operation Collect the load current. Turn on the external input of this instrument and collect 10 waveforms of load current. ②Collecting waveform The waveform is determined by the external input status and the number of waveform data. Beginning of When the external input turns from OFF to ON. the waveform When 20 waveform data are collected.
  • Page 105 Operation (3) Performing waveform band monitoring Waveform band monitoring is performed during operation mode. The alarm occurrence status changes as follows according to the monitoring result. Alarm occurrence Monitoring result Remarks status Normal Non-occurrence In this case, the Band out rate is below the threshold. In this case, the Band out rate exceeds the threshold and an alarm Alarm occurrence occurrence...

  • Page 106: Confirmation Mode / Test Mode

    Confirmation mode / Test mode Confirmation mode / Test mode Do not touch the live part such as the connection terminal while it is energized. It may cause DANGER electric shock, a fire, a failure, a malfunction etc. If an abnormal sound, bad-smelling smoke, fever break out from this unit, switch it off promptly WARNING and do not use it.
  • Page 107 Confirmation mode / Test mode ■Flow of the test function Return to the test menu by pressing [DISP/SET] Confirmation menu 6 for more than 1 second at all test mode. Test mode DISP/SET Test menu 1 Test menu 2 (Discrimination support function (Communication test) for improper connection) Test menu 3...

  • Page 108: Test Menu 1: Discrimination Support Function For Improper Connection

    Confirmation mode / Test mode 10.3 Test menu 1: Discrimination support function for improper connection In test mode, the following operations can be possible. Test menu Choose the test menu 1. *In case you set the simple measurement effective, the voltage and phase angle cannot be measured, so “non”...
  • Page 109 Confirmation mode / Test mode ■Operation and transition of display. (Examples of a three-phase 4-wire) +/PHASE Phase angle (Voltage, 1-N phase)*1 Phase angle (Voltage, 2-N phase)*1 Phase angle (Voltage, 3-N phase)*1 DISP/SET +/PHASE Phase angle (Current, Phase 1)*1 Phase angle (Current, Phase 2)*1 Phase angle (Current, Phase 3)*1 +/PHASE Electric power (Phase 1)

  • Page 110: Test Menu 2: Communication Test

    Confirmation mode / Test mode 10.4 Test menu 2: Communication test In test mode, the following operations can be possible. Test menu Choose the test menu 2. DISP/SET Test the communication. (You can monitor non-zero values without voltage or current input.) ■Monitored value in communication Monitoring the fixed value determined by the set value (phase wire system, primary (1) Communication test...

  • Page 111: Test Menu 3： Pulse Output Test

    In test mode, the following operations can be possible. Test menu Choose the test menu 3. *For EMU4-BD1A-MB, this unit is not the external output function, so “non” will be displayed and it will automatically return to the setting menu.

  • Page 112: Test Menu 4： Alarm Output Test

    In test mode, the following operations can be possible. Test menu Choose the test menu 4. *For EMU4-BD1A-MB, this unit is not the external output function, so “non” will be displayed and it will automatically return to the setting menu.

  • Page 113: Test Menu 5： F/W Version Indication

    Confirmation mode / Test mode 10.7 Test menu 5： F/W version indication In test mode, the following operations can be possible. Test menu Choose the test menu 5. DISP/SET (1) F/W version indication Display F/W version of this unit. DISP/SET Press [DISP/SET] for more than 1second.

  • Page 114: Requirement For The Compliance With Emc Directives

    This section compiles the precautions for the compliance of the system incorporating the energy measuring unit (Target model: EMU4-BD1A-MB and EMU4-HD1A-MB) with the EMC Directives. The following description is based on the requirement of the regulations and the standards we understand, but we do not guarantee to comply with the directives above for the whole system built in accordance with this description.

  • Page 115: Specifications

    Specifications Specifications 12.1 Common specifications Items Specifications Model EMU4-BD1A-MB EMU4-HD1A-MB Phase-wire system Single-phase 2-wire/ Single-phase 2-wire/ (Change of setting) Single-phase 3-wire/ Single-phase 3-wire/ Three-phase 3-wire Three-phase 3-wire/ Three-phase 4-wire Rating Voltage Single-phase 2-wire 110 V, 220 V AC common 110 V, 220 V, 440 V AC common circuit (Delta connection：Max 220V,...
  • Page 116 Specifications Items 仕様 Specifications External Input signal － Non-voltage Form A contact, or open input collector 1 input Function － Pulse count： 0 to 999999 counts Contact monitoring *5 Isolation － By photo coupler Rated input voltage and － 5 V DC, 7 mA (Supplied by this unit) current Input condition －...

  • Page 117: Specifications Of Modbus Rtu Communications

    Specifications 12.2 Specifications of MODBUS RTU communications Items Specifications Communication method RS-485 2-wire half duplex Communication protocol MODBUS RTU mode (binary data transfer) Synchronization method Asynchronous Transmission wiring type Multi-point bus (either directly on the trunk cable, forming a daisy-chain) Baud rate 2400, 4800, 9600, 19200, 38400 bps (default: 19200 bps) Data bit...

  • Page 118: External Dimensions

    Specifications 12.3 External dimensions (１) Energy Measuring Unit only ■EMU4-BD1A-MB Unit: mm ■EMU4-HD1A-MB Unit: mm...
  • Page 119 Specifications (２) Combination with option unit ■EMU4-BD1A-MB (connect EMU4-CM-B or EMU4-CM-C) Unit: mm *The figure above shows a combination with EMU4-CM-C. The external dimensions are the same when combined with EMU4-CM-B. ■EMU4-HD1A-MB (connect EMU4-CM-B or EMU4-CM-C) Unit: mm *The figure above shows a combination with EMU4-CM-C.
  • Page 120 Specifications ■EMU4-BD1A-MB (connect EMU4-LM or EMU4-CM-CIFB) Unit: mm *The figure above shows a combination with EMU4-LM. The external dimensions are the same when combined with EMU4-CM-CIFB. ■EMU4-HD1A-MB (connect EMU4-LM or EMU4-CM-CIFB) Unit: mm *The figure above shows a combination with EMU4-LM.
  • Page 121 Specifications (３) Mounting on panel ■EMU4-BD1A-MB (use EMU4-PAT) Unit: mm *The external dimensions for EMU4-HD1A-MB are the same.

  • Page 122: Specifications Of Option Devices(Split Type Current Sensor)

    Specifications 12.4 Specifications of option devices(Split type current sensor) Item Specifications Model EMU-CT50 EMU-CT100 EMU-CT250 Rated primary current 50 A AC 100 A AC 250 A AC Rated secondary 16.66 mA 33.33 mA 66.66 mA current Rated load 0.1 VA Relative error ±1% (5 to 100% range of rating, RL ≤...
  • Page 123 Specifications Item Specifications Model EMU2-CT5 EMU2-CT5-4W EMU-CT5-A Rated primary current 5 A AC Rated secondary 1.66 mA current Rated load 0.1 VA Relative error ±1% (5 to 100% range of rating, RL ≤ 10 Ω) ±45′（10% to 100% of rating, Variability of phase ±30′(5 to 100% range of rating, RL ≤...

  • Page 124: External Dimensions Of Option Devices

    Specifications 12.5 External dimensions of option devices Describes the external dimensions of option devices. For Option units and options (option for Logging Unit), refer to the instruction manual for each instrument. 12.5.1 Option for Energy Measuring Unit ■The attachment for panel mounting (EMU4-PAT) Unit: mm 12.5.2 Split type current sensor ■Split type current sensor (Connection with general wire type) (EMU-CT50，...
  • Page 125 Specifications ■Split type current sensor (Connection with general wire type) (EMU-CT250-A， EMU-CT400-A， EMU-CT600-A) Unit: mm Model EMU-CT250-A 42.6 49.4 74.5 25.2 EMU-CT400-A、EMU-CT600-A 44.9 67.2 ■Split type current sensor(Connection with dedicated cable type) (EMU2-CT5) Details for sensor part Unit: mm Unit: mm ■Split type current sensor(Connection with dedicated cable type) (EMU2-CT5-4W) Unit: mm...
  • Page 126 Specifications 12.5.3 Dedicated cable ■Split type 5A current sensor cable (EMU2-CB-Q5A) Unit: mm ■Split type 5A current sensor cable (EMU2-CB-Q5A-4W) Unit: mm ■Split type 5A current sensor extension cable (standard type) (EMU2-CB-T**M) Model EMU2-CB-T1M EMU2-CB-T5M EMU2-CB-T10M L size 1000 5000 10000 Unit: mm ■Split type 5A current sensor extension cable (separate type) (EMU2-CB-T**MS)

  • Page 127: Care

    Care Care ●Do not touch the live part such as the connection terminal while it is energized. Failure to do so may cause electric shock, a fire, a failure etc. DANGER ●If the voltage applied to the instrument drops below approximately 40 V, the display will disappear, but please do not touch the terminals or circuits as voltage may be applied.

  • Page 128: Maintenance

    Maintenance Maintenance ●Do not touch the live part such as the connection terminal while it is energized. Failure to do so may cause electric shock, a fire, a failure etc. ●If the voltage applied to the instrument drops below approximately 40 V, the display will DANGER disappear, but please do not touch the terminals or circuits as voltage may be applied.

  • Page 129: Troubleshooting

    Troubleshooting Troubleshooting This chapter explains the details of problems and how to deal with them. If the contents described here do not solve the problem, contact our sales representative near you. (For details, (For details, refer to the end of this manual.). 16.1 In case you think the unit is in failure If you think the unit is in failure, check the following before sending for repair.

  • Page 130: About Error Number

    Communication lines are busy. It will automatically return after a while. If it occurs repeatedly, please contact sales outlet. The energy measuring unit has failed. Please contact Mitsubishi Electric system service or sales outlet Measuring unit failure (Please mention the error number when you contact us).

  • Page 131: Ｑ＆Ａ

    Troubleshooting 16.3 Ｑ＆Ａ ■General To what degree is the unit durable against overvoltage and over current? Durability is as follows: Momentary*: Up to 10 times as high as rated current and 2 times as high as rated voltage. *Momentary means: Energizing 9 times for 0.5 seconds at 1-minute intervals, and then 1 time for 5 seconds.
  • Page 132 Troubleshooting ■Q&A about installation What is wire diameter that allows installing the split type current sensor? The following lists the nominal cross-sectional areas of the conductor of 600-V vinyl coated wires that can penetrate. (Values for reference) IV wire CV wire 形名...

  • Page 133: Appendix: Discrimination Support Function For Improper

    Appendix: Discrimination support function for improper Appendix: Discrimination support function for improper connection ■Display example of discrimination support function for improper connection Display example (Connection example for three-phase 3-wire(2CT)) ----Indicates improper connection * The shaded areas in the table are affected by improper connection. Also, the broken lines in the connection diagram are the improper connections. At equilibrium load（V ＝V ，...
  • Page 134 connection Display example (Connection example for single-phase 3-wire) ----Indicates improper connection * The shaded areas in the table are affected by improper connection. Also, the broken lines in the connection diagram are the improper connections. At equilibrium load（V12＝V23， I1＝I3） Connection Power Electric power factor...
  • Page 135 connection Display example (Connection example for three-phase 4-wire) ----Indicates improper connection * The shaded areas in the table are affected by improper connection. Also, the broken lines in the connection diagram are the improper connections. At equilibrium load（V ＝V ＝I ）...
  • Page 136 connection Display example (Connection example for three-phase 4-wire) ----Indicates improper connection * The shaded areas in the table are affected by improper connection. Also, the broken lines in the connection diagram are the improper connections. At equilibrium load（V ＝V ＝I ）...
  • Page 137 connection Display example (Connection example for three-phase 4-wire) ----Indicates improper connection * The shaded areas in the table are affected by improper connection. Also, the broken lines in the connection diagram are the improper connections. At equilibrium load（V ＝V ＝I ）...
  • Page 138 connection Display example (Connection example for three-phase 4-wire) ----Indicates improper connection * The shaded areas in the table are affected by improper connection. Also, the broken lines in the connection diagram are the improper connections. At equilibrium load（V ＝V ＝I ）...
  • Page 139 connection Display example (Connection example for three-phase 4-wire) ----Indicates improper connection * The shaded areas in the table are affected by improper connection. Also, the broken lines in the connection diagram are the improper connections. At equilibrium load（V ＝V ＝I ）...
  • Page 140 connection Display example (Connection example for three-phase 4-wire) ----Indicates improper connection * The shaded areas in the table are affected by improper connection. Also, the broken lines in the connection diagram are the improper connections. At equilibrium load（V ＝V ＝I ）...
  • Page 141 connection Display example (Connection example for three-phase 4-wire) ----Indicates improper connection * The shaded areas in the table are affected by improper connection. Also, the broken lines in the connection diagram are the improper connections. At equilibrium load（V ＝V ＝I ）...
  • Page 142 connection Display example (Connection example for three-phase 4-wire) ----Indicates improper connection * The shaded areas in the table are affected by improper connection. Also, the broken lines in the connection diagram are the improper connections. At equilibrium load（V ＝V ＝I ）...

  • Page 143: Warranty

    Warranty Warranty Before using the product, please confirm the following product warranty details. If you have any questions or if there is a problem, contact our sales representative near you. (See back cover). ◼ Gratis warranty period and Gratis warranty extent During the gratis warranty period, if the product has a failure or defect (hereinafter collectively referred to as "failure") that is the responsibility of our company, we will replace the product free of charge through the store where you purchased it or our service company.
  • Page 144 Warranty ◼ Product application (1) For use of products described in this manual, they shall be used for a purpose which shall not lead to a material accident even when a failure or malfunction of the products occurs, and a backup or fail-safe function shall be implemented systematically at external of the device in the event of a failure or malfunction.

  • Page 145: Trademarks Of Other Companies

    Trademarks of other companies Trademarks of other companies ● MODBUS is a trademark of Schneider Electric USA Inc. ● Other company and product names herein are trademarks or registered trademarks of their respective owners. ● In the text, trademark symbols such as "TM" and "®" may not be written. About license information for open-source software This instrument contains open-source software programs (OSS) subject to the following license information.
  • Page 146 About license information for open-source software Energy Measuring Unit Please refer to our website for service network. Our website address: https://www.mitsubishielectric.com/fa/ HEAD OFFICE: TOKYO BUILDING, 2-7-3, MARUNOUCHI, CHIYODA-KU, TOKYO 100-8310, JAPAN IB63G65A 24 03 New publication effective Mar.2024 Specifications are subject to change without notice.

This manual is also suitable for:

Emu4-hd1a-mb

Table of Contents