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KW8M Eco-POWER METER (1A/5ACT input type)

Chapter 1 Unit’s Features and Structure

■

With KW8M Eco-POWER METER, electrical power (voltage, current, etc.), power factor, frequency,

etc are measured using AC voltage and AC current input via one of the following systems:
single-phase two-wire system, single-phase three-wire system, three-phase three-wire system or
three-phase four-wire system.

This also works as an hour meter, that is measured power-on or power-off time, and as a counter that
is for pulse output equipment like flow meter.

■

Eco-POWER METER is designed chiefly to manage saving energy. It is neither intended nor

can it be legally used for billing.

1.1 Unit’s Name and Part Numbers

1.1.1 Main unit

Product name

KW8M Eco-POWER METER 1A/5A CT input type

Model No.

AKW8115

Phase and Wire system

・

Single-phase two-wire

・

Single-phase three-wire

・

Three-phase three-wire

・

Three-phase four-wire

Power supply

100-240V AC 50/60Hz

Measured voltage input

・

400VAC

・

100/200VAC

Measured current input

4000A or less (Secondary side current of CT:1A or 5A)

Terminal type

Screw terminal (M3 +/- screw)

1.1.2 Options

Product name

Model No

Terminal cover

AKT8801

Installation frame

AKW8822

Содержание AKW8115

Страница 1: ......

Страница 2: ...t to do Measure Power Mount Connection Settings Count pulse output from other device Output Alarm Wire the main unit Connect the current transformer CT Wire output line Collect data via RS485 Wire communication line Wire input line Power on the main unit Set the parameter for pulse measurement MODE2 Check measured data with power monitoring mode Set alarm output MODE1 Check count value with power ...

Страница 3: ...imum of the characteristics and performance that are assured in these specifications Do not dismantle or remodel the product It could lead to abnormal exothermic heat or smoke generation Do not touch the terminal while turning on electricity It could lead to an electric shock Use the external devices to function the emergency stop and interlock circuit Connect the wires or connectors securely The ...

Страница 4: ...roduction Thank you very much indeed for purchasing KW8M Eco POWER METER In this manual we explain the usage of KW8M Eco POWER METER in detail Please use it correctly after understanding the content enough ...

Страница 5: ...lse output 25 5 3 1 Output depends on integral electric power 25 5 3 2 Instantaneous electric power alarm 25 5 3 3 Current alarm 25 5 3 4 Stand by power alarm 26 5 3 5 Output depends on count value 26 5 4 Counter function 26 5 4 1 Operation mode 26 5 4 2 Change the Preset Value 26 Chapter 6 Display of each Value 27 6 1 Outline for the Working of Display 27 6 1 1 Integral Electric Power 28 6 1 2 In...

Страница 6: ... Pulse input 47 8 3 Pulse output Transistor output Specifications 47 8 4 Communication Specifications 48 8 5 Self diagnostic function 48 8 6 Power Failure Memory 48 8 7 Applicable standard 48 Chapter 9 Mounting 49 9 1 Dimensions 49 9 1 1 Main unit 49 9 2 Panel cutout 49 9 3 Panel mounting 50 Chapter 10 Q A 51 ...

Страница 7: ...power supply input and output Do not perform wiring or installation with a live line It may also lead to circuit burnout or fire by way of the secondary CT side opening Installation Installation and wiring must be performed by expert personnel for electrical work or electric piping The power supply terminal and voltage input terminal of the main unit is common Therefore if additional noise effects...

Страница 8: ...ot turn on the power supply or input until all wiring is completed Before power on Please note the following points when turning on power at the first time Confirm there are neither wiring rubbish nor especially an electrical conduction when installed Confirm neither the power supply wiring the I O wiring nor the power supply voltage are wrong Tighten the installation screw and the terminal screw ...

Страница 9: ...at is for pulse output equipment like flow meter Eco POWER METER is designed chiefly to manage saving energy It is neither intended nor can it be legally used for billing 1 1 Unit s Name and Part Numbers 1 1 1 Main unit Product name KW8M Eco POWER METER 1A 5A CT input type Model No AKW8115 Phase and Wire system Single phase two wire Single phase three wire Three phase three wire Three phase four w...

Страница 10: ...0 Voltage V 0 0 to 9999 Electricity charge 1 0 00 to 99999999 Power Factor 0 00 to 1 00 LEAD Leading phase LAG lagging phase Within the range of phase angle θ 90 to 0 to 90 degree Frequency Hz 47 5 to 63 0 ON time Hour meter OFF time hour 0 0 to 99999 9 Pulse counter 0 to 99999999 In case of setting to 1 000 for prescale 2 1 Eco POWER METER is designed chiefly to manage saving energy It is neither...

Страница 11: ...isplay each setting value MODE Key SET Key ITEM Key SHIFT Key Left Right Keys OPTION Key No use START STOP Key No use 2 2 Keys Functions Key Functions MODE Use to select setting mode SET Use to set each value entered ITEM To select measured display To shift each mode To change each setting value SHIFT To select measured display To shift each mode To change each setting value Left Right To change e...

Страница 12: ... some distortion by harmonic or waveform it may not measure correctly Please check with the actual system before adopts it Use the applicable wire There might be occurred the malfunction damage or electrical shock Caution for Wiring 1 Terminal fastening torque should be 0 6 to 1 0N m 2 This has no built in power switch circuit breaker for power supply part To protect the device it is necessary to ...

Страница 13: ... several CTs each CT is separated as far as possible If they are near it might not measure correctly by the interference of magnetic field When measuring a load with rated input voltage Single phase two wire system One current transformer CT is required to measure single phase two wire system Back View Single phase three wire Two CTs are required to measure single phase three wire system Wire by d...

Страница 14: ...A 5ACT input type 6 Three phase three wire system Two CTs are required to measure three phase three wire system Back View Three phase four wire system Three CTs are required to measure three phase four wire system Back View ...

Страница 15: ... low voltage circuit Single phase two wire system Single phase three wire Back View Back View No 13 14 17 18 19 20 are not wired No 14 19 20 are not wired Three phase three wire system Three phase four wire system Back View Back View No 14 19 20 are not wired CT1 11 12 13 14 15 16 L N VT P1 P0 k l 11 12 13 14 15 16 17 18 CT1 R N S CT2 VT P1 P0 P2 k l k l R S T N CT3 k l k l k l P1 P0 P2 P3 CT2 CT1...

Страница 16: ...mary side current of CT setting mode CT 1 ex If the measured CT is 400A 1A or 400A 5A set to 400 3 Connect CT according to the CT direction power side K to load side L Connection example With Ammeter etc Without Ammeter Load Secondary current Breaker Ammeter etc Power supply CT with 2nd current 1A 5A K L K L Eco POWER METER Load Secondary current Breaker Power supply CT with 2nd current 1A 5A K L ...

Страница 17: ...quipment must have the power supply transformer in which the secondary side is not grounded with the primary and secondary sides insulated in order to prevent interference of the power supply circuit when connecting the external input circuit Be sure not to use an auto transformer 3 4 For Output connection Since the transistor output is insulated from the internal circuit by a photo coupler it can...

Страница 18: ...Applicable cable 1 25 mm2 AWG16 or more Max 16 8Ω km Polyethylene Max 0 5 mm Approx 8 5 mm HITACHI KPEV S 1 25 mm2 1P Belden Inc 9860 Twisted pair with shield 0 5 mm2 AWG20 or more Max 33 4Ω km Polyethylene Max 0 5 mm Approx 7 8 mm HITACHI KPEV S 0 5 mm2 1P Belden Inc 9207 VCTF 0 75 mm2 AWG18 or more Max 25 1Ω km PVC Max 0 6 mm Approx 6 6 mm VCTF 0 75 mm2 2C JIS Cable Section Twisted pair with shi...

Страница 19: ...1 or EN60947 3 compliant circuit breaker The breaker that connects to the voltage input part must arrange at the position easily reached and display shows it is the breaker of the equipment 3 Use a wire with basic insulation or more for a wire cramped or connected CT Environmental conditions Overvoltage category Ⅱ Pollution degree 2 Indoor use An ambient temperature of 10 to 50 An ambient non cond...

Страница 20: ...etting mode SYST Refer to the next page SET CT type setting mode CT T SET Primary side current of CT setting mode CT 1 SET Voltage range setting mode VOLT SET VT setting mode VT SET Current for time measurement setting mode HM A SET Cutoff current setting mode CUTA SET Unit for pulse output setting mode PL P When select When select AL P SET When select AL C SET When select AL S SET When select Cnt...

Страница 21: ...ansmission speed setting mode SPD SET Transmission format setting mode FMT SET Response time setting mode RESP SET Monitor Press MODE to return Monitor Initial value list Mode 1 Mode 2 Item Initial value Item Initial value Phase Wire system 1P2W CT type 50 Max counting speed 2000 Pre scale 1 000 Primary side current of CT 1 Unit CNT Voltage range 400 VT 1 00 Mode 3 Item Initial value Current for t...

Страница 22: ...00 When it measures load of 400V system select 400 When it measures load of 100 200V system select 200 In case measuring the load of 100 200V system with selecting 400 the resolution will be down Select the correct voltage range VT setting mode VT Mode defines voltage input method to the main unit input voltage directly or uses a voltage transformer VT over 440V system It can be set the range of 1...

Страница 23: ...s the ratio of current used for alarm output Ratio for the rated current It is set the range of 1 0 to 100 0 Stand by alarm setting mode 1 ALS1 Only when AL S is selected on unit for pulse output setting mode Mode defines the ratio of current used for threshold value to judge stand by power Ratio for the rated current It is set the range of 1 0 100 0 Stand by alarm setting mode 2 ALS2 Only when AL...

Страница 24: ...P4W SET CT type setting mode Press ITEM SHIFT to change 1 5 1 5 SET Primary side current of CT setting mode It is only when 5A is selected on CT type setting mode Set primary side current of CT using ITEM SHIFT If measured CT is 100A 5A set to 100 If 5A is measured set to 5 Increase value Decrease value Shift place to set 1 4000 Initial 5 Shift place to set SET Voltage range setting mode Press ITE...

Страница 25: ...nt setting mode Set current for time measurement using ITEM SHIFT If you measure the current over 50 0 F S set to 50 0 Increase value Decrease value Shift place to set 1 0 100 0 Shift place to set SET Cutoff current setting mode Set cutoff current using ITEM SHIFT If you don t measure the current under 10 0 F S set to 10 0 Increase value Decrease value Shift place to set 1 0 50 0 Shift place to se...

Страница 26: ...t setting mode Display changes to set an alarm value after AL P is displayed at the upper line for 1 sec Set power for alarm using ITEM SHIFT 0 00 to 999999 99 Increase value Decrease value Shift place to set after 1 sec Shift place to set SET Current alarm setting mode It is only when AL C is selected on unit for pulse output setting mode Set current ratio for the rated current for alarm using IT...

Страница 27: ...tand by power 1 to 9999 Alarm is output at the time when passing the setting time with the stand by power The alarm can be reset by pressing SET with display of instantaneous electric power current voltage frequency and PF After reset the alarm start to monitor the stand by power again SET Preset value setting mode It is only when Cnt is selected on unit for pulse output setting mode Display chang...

Страница 28: ... METER 1A 5ACT input type 20 Electricity charge setting mode Set the rate per 1kWh using ITEM SHIFT Increase value Decrease value Shift place to set 0 00 99 99 Initial 10 00 Shift place to set SET Monitor ITEM SHIFT ...

Страница 29: ...ode is applied to count value and preset value ex When 0 01 Last 2 digit is set the decimal point of count value and preset value has 2 digit under decimal point MODE2 Setting flow chart Monitor MODE MODE 1 display ITEM MODE 2 display SET Max counting speed setting mode Press ITEM SHIFT to change 2000 2kHz 30 30Hz 2000 30 SET Pre scale setting mode Set pre scale value using ITEM SHIFT 0 001 to 100...

Страница 30: ...m 38400 19200 9600 4800 2400 bps Transmission format setting mode FMT Mode defines serial communication RS485 transmission format Data length Parity Define the transmission format according to the master s PLC etc Select from 8bit o 7bit n 7bit E 7bit o 8bit n 8bit E n none means parity is not available E Even means parity is even number o odd means parity is odd number With MODBUS RTU protocol it...

Страница 31: ... 19200 38400 2400 4800 9600 19200bps 38400bps 2400bps 4800bps 9600bps SET Transmission format setting mode Press ITEM SHIFT to change 8bit o 7bit n 7bit E 7it o 8bit n 8bit E n not available E even number o odd number 8bit o 7bit n 7bit E 7it o 8bit n 8bit E SET Response time setting mode Set the response time using ITEM SHIFT Increase value Decrease value Shift place to set 1 to 99 ms initial 5 S...

Страница 32: ...ing time After turns off the backlight any key operation makes it turns on After turns off the backlight one decimal point at the right end is blinking MODE4 Setting flow chart Monitor MODE MODE 1 display ITEM 3 times MODE 4 display SET Auto off setting mode Set auto off time by minute using ITEM SHIFT Increase value Decrease value Shift place to set 0 to 99 min Shift place to set 0 should be set ...

Страница 33: ...ication TX RX indicator is blinking while Eco POWER METER is under communication 5 3 Display when pulse output Refer to the mode 1 setting for the way to set OUT indicator is lighting when pulse output 5 3 1 Output depends on integral electric power Set the unit for pulse output 0 001 0 01 0 1 1 10 100kWh and pulse output transistor output turns on every time when integral electric power reaches t...

Страница 34: ... completion 2 It reverts 0 after counting up full scale but output control is maintained However output is OFF if count value or preset value is changed 5 4 2 Change the Preset Value It is possible to change the preset value even during counting However note the following points When the pre scale value is 1 000 PSCL 1 000 1 If the preset value is changed to the value less than the count value cou...

Страница 35: ...L2 T S SHIFT L3 T S ITEM Voltage 2 L1 P1 P0 SHIFT L2 P2 P0 SHIFT L3 P1 P2 P3 P0 ITEM Electricity charge ITEM Power factor ITEM Frequency ITEM Hour meter Load ON time ON h SHIFT Load OFF time OFF h ITEM Counter ITEM Current Voltage 1P2W system L1 R current L1 P1 P0 voltage 1P3W system L1 R current L2 T current L1 voltage L2 voltage P1 P0 P2 P0 3P3W system L1 R current L2 T current L3 S current L1 v...

Страница 36: ...s changed automatically After reaching the full scale 9999999 9 the value reverts to 0 00 but continues to measure Although instantaneous reactive power is minus value when leading phase and it shows minus in the display it doesn t integrate the integral apparent power How to reset the integral electric power active reactive apparent Hold down SET and press MODE makes integral electric power clear...

Страница 37: ...he display It is plus value when lagging phase but it doesn t show plus 6 1 3 Current It displays the current value of the load Press SHIFT to change L1 CT1 phase L2 CT2 phase L3 CT3 phase current Before start measuring select phase and wire system according to the measured load When 1P3W or 3P3W is selected it doesn t measure 1P2W system correctly When 3P4W system is selected it doesn t measure 1...

Страница 38: ...measure 1P2W 1P3W 3P3W system correctly Select phase and wire system according to the measured system Refer to the explanation of setting mode V Lighting When input voltage is under 5 of rating it displays 0 0 and doesn t measure Under 5 means the value getting from this calculation rated voltage 200 400 x 0 05 x VT ratio When input voltage exceeds 150 F S at each range will be displayed Voltage m...

Страница 39: ...e explanation of setting mode Sample of lagging phase Sample of leading phase cosφ Lighting How to calculate power factor Eco POWER METER displays power factor by calculating as below Power factor operation is a method assuming balanced load The error might be big when it measures unbalanced load Single phase two wire Single phase three wire Three phase four wire 1P3W a 2 3P4W a 3 Three phase thre...

Страница 40: ...me measured by CT1 Press SHIFT to change the load ON time to load OFF time ON h and OFF h display disappears after a few seconds by pressing ITEM or SHIFT ON time h after a few seconds OFF time h after a few seconds Blinking the decimal point during measurement of ON time TIME Lighting Blinking the decimal point during measurement of OFF time TIME Blinking ...

Страница 41: ...99 9h the value reverts to 0 0h but continues to measure ON ON CT Detection OFF OFF Full scale ON time OFF time How to Reset ON OFF time Hold down SET and press MODE makes ON time or OFF time clear ON time and OFF time are reset by each Reset ON SET OFF ON MODE OFF 6 1 9 Counter It displays present count value pulse input value The position of decimal point for count number and preset value is dec...

Страница 42: ...git After reaching the full scale 99999999 x prescale value the value reverts to 0 but continues to measure How to enter preset value It is entered and set at preset setting mode of MODE1 Refer to Setting Mode Explanation How to Reset Count value Hold down SET and press MODE makes count value clear Reset ON SET OFF ON MODE OFF LED is lighting to indicate it shows upper digits COUNT Lighting LED is...

Страница 43: ...he response from Eco POWER METER In order to improve the communication quality we recommend to send the transmission again Communication timing of RS485 Eco POWER METER Slave side When Eco POWER METER Slave starts transmission to RS485 communication line it is arranged so as to provide an idle status transmission period of about 1 to 99ms setting available Tb before sending the response to ensure ...

Страница 44: ...nation and source AD H L Two digit decimal 01 to 99 ASCII codes Command messages contain a station number for Eco POWER METER that receives the message When FF ASCII code table is used however the transmission is a global transmission sent to all stations at once Note When a global transmission is sent no response to the command message is returned Block check code Bcc H L Two digit hexadecimal 00...

Страница 45: ...0 R W DT00070 Voltage range Unsigned 16bit 1 400V 2 200V R W DT00077 Ratio for stand by current 0 1 Unsigned 16bit 10 to 1000 R W DT00078 Time for stand by alarm 1min Unsigned 16bit 0 to 9999 R W DT00100 DT00101 Integral active power 0 01kWh Unsigned 32bit 0 to 999999999 R W DT00102 DT00103 Integral reactive power 0 01kvarh Unsigned 32bit 0 to 999999999 R W DT00104 DT00105 Integral apparent power ...

Страница 46: ... data 41H Format error A command message was sent that does not fit the transmission format 42H No support error A command was sent that is not supported 43H Procedure error Delimiter with multiple frames was sent The response shall be multiple frames Application error Error code Error name Explanation 60H Parameter error The data code is not D 61H Data error Word No is specified without decimal 0...

Страница 47: ...D D 104 103 102 101 100 D 104 103 102 101 100 161 160 CR Command Register reset 10 1 10 0 M D F F F F F F 16 1 16 0 CR Normal response Registration successful 10 1 10 0 M D 16 1 16 0 CR MG Monitoring start Monitors a registered data Command 101 100 M G 161 160 CR Normal response Monitoring successful 101 100 M G 0 0 0 161 160 161 160 163 162 161 160 163 162 161 160 CR RT Read the status of Eco POW...

Страница 48: ...e response message Slave address 0 00H broadcast address can identify all slaves connected However slaves do not respond Function code Function code is command code for the slave to undertake the following action types Function code Contents 03 03H DT Read 06 06H DT1 word write 16 10H DT several data write Function code is used to discern whether the response is normal acknowledgement or if any er...

Страница 49: ...s X 4 When a carry is generated as a result of the shift XOR is calculated by X of 3 and the fixed value A001H This is assumed as X If a carry is not generated go to step 5 5 Repeat steps 3 and 4 until shifting 8 times 6 XOR is calculated with the next data and X This is assumed as X 7 Repeat steps 3 to 5 8 Repeat steps 3 to 5 up to the last data 9 Set X as CRC 16 to the end of message in sequence...

Страница 50: ... 16 0017H 3 5 idle characters 1 1 2 2 2 character number A response message from the slave in exception error status When number of data has been mistaken Function code MSB is set to 1 for the response message in exception error status 90H The exception code 03H Value out of the devise numbers is returned as contents of error Mistaken message example Command 3 5 idle characters Slave address 01H F...

Страница 51: ...eshold for time measurement 0 1 Unsigned 16bit AH to 3E8H 10 to 1000 03H 06H 10H 0044H DT00068 Cutoff current 0 1 Unsigned 16bit AH to 1F4H 10 to 500 03H 06H 10H 0045H DT00069 Current alarm value 0 1 Unsigned 16bit AH to 3E8H 10 to 1000 03H 06H 10H 0046H DT00070 Voltage range Unsigned 16bit 1H 1 400V 2H 2 200V 03H 06H 10H 004DH DT00077 Current ratio for stand by alarm 0 1 Unsigned 16bit AH to 3E8H...

Страница 52: ... 00AAH LSB DT00170 00ABH MSB DT00171 Voltage L1V R 0 1V Unsigned 32bit 0H to 1869FH 0 to 99999 03H 00ACH LSB DT00172 00ADH MSB DT00173 Voltage L2 S T 0 1V Unsigned 32bit 0H to 1869FH 0 to 99999 03H 00AEH LSB DT00174 00AFH MSB DT00175 Voltage L3V S T 0 1V Unsigned 32bit 0H to 1869FH 0 to 99999 03H 00B0H LSB DT00176 00B1H MSB DT00177 Instantaneous active power 0 01kW Unsigned 32bit 0H to 5F5E0FFH 0 ...

Страница 53: ... off current 10mA Insulation resistance initial Between the isolated circuits 100MΩor more measured at 500V DC A Outer edge enclosure All terminals B Insulated circuit Operating power supply terminals Analog input terminals Operating power supply terminals Pulse input terminal RS485 All other terminals Pulse output terminals All other terminals note1 Vibration resistance 10 to 55Hz 1cycle min sing...

Страница 54: ... CT with secondary side current 1A or 5A Rated input current Secondary side current of CT 1A or 5A Select with setting mode Allowable measured current 120 of rated input current Input current Current overload capacity 1000 of rated input current 3 sec Cut off current 1 0 to 50 0 F S Cut off voltage Under 5 of rated voltage Fixed Under the value calculated by rated voltage x 0 05 x VT ratio Special...

Страница 55: ... output Transistor output Specifications Number of output point 1 point Insulation method Optical coupler Output type Open collector Output capacity 100mA 30V DC Pulse width approx 100ms ON state voltage drop 1 5V or less OFF state leakage current 100μA or less Pulse output unit 0 001 0 01 0 1 1 10 100kWh Alarm AL P Current alarm AL C Stand by alarm AL S Counter Cnt Selectable with setting mode We...

Страница 56: ... using this system with the other devices up to 31 Eco POWER METER can be connected 4 With MODBUS RTU protocol it works only with 8bit 8 5 Self diagnostic function If an error occurs the following indication will be given Indicator Meaning Output status To recover ERR0 CPU error Turn the power off and then on again ERR1 Memory error OFF EEP ROM life ended Replace the unit Includes the possibility ...

Страница 57: ...KW8M Eco POWER METER 1A 5ACT input type 49 Chapter 9 Mounting 9 1 Dimensions 9 1 1 Main unit Unit mm Clearance 1 0 9 2 Panel cutout Unit mm For connected mounting n numbers of mounting units ...

Страница 58: ...t type 50 9 3 Panel mounting 1 Insert a unit from the front of the panel 2 Attach the mounting bracket by the holes at the top and bottom of case and secure in place with screws Fastening torque approx 0 12N m Panel thickness 1 to 15mm ...

Страница 59: ... more We can t guarantee the specifications if you extend more than 10m Q4 How do you guarantee the accuracy of measurement with low current range A4 Up to 5 for CT rating In case of CT50A it guarantees for an electric power with current 2 5A or more Q5 How long do I extend pulse input cable A5 You can extend up to 10m with shielded wire or a metallic electric wire tube individually Q6 What do I u...

Страница 60: ...A 5ACT input type 52 Revision History Issue Date Manual no Content of revision May 2010 ARCT1F504E First edition March 2012 ARCT1F504E 1 2nd edition Improve the accuracy July 2013 ARCT1F504E 2 3rd edition Company name change ...

Страница 61: ... ...

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