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ROOTECH ACCURA 3300S User Manual Download Page 26

Page  26 

 

Step 3: Wiring the Device for RS485 Communication 

 

Fig 1.18 Communication Wiring 

 

 

Item 

Description 

Pin name 

Ta[TRX+], Tb[TRX-] 

Connector   

Screw terminal[Pluggable] 

Wire   

1.25 to 3.5 mm

2

[ 24 to 14 AWG], Shield twisted pair 

Maximum Cable Length 

1219m[4000ft] 

Maximum Devices/bus 

32 

 

 

Note 

 

Using a UL2919 cable is recommended for communication.

 

 

Comm Indicator 

The Comm LED blinks green when the meter is transmitting data. 

 

Protocol 

The  meter  provides  Modbus  RTU  protocol.  Refer  to  the  Accura  3300S  Communication  User

’

s 

Guide for details about the Modbus protocol. 

 

Summary of Contents for ACCURA 3300S

Page 1: ......

Page 2: ...performed only by qualified competent personnel that have received appropriate training for high voltage and current devices Caution If hazardous voltages are mishandled while installing and operatin...

Page 3: ...s User Guide without prior notice We recommend that customers should obtain the latest information on product specifications and the manual before making orders In the absence of written agreements Ro...

Page 4: ...ment services for the product Rootech will decide at its discretion whether to repair or replace it or give a refund for the product for when the warranty period for the product expired or issues rela...

Page 5: ...nsible for determining the feasibility of such suggestions and should conduct tests to prove their feasibility It is the original purchaser s responsibility to determine the suitability of the product...

Page 6: ...09 11 27 Voltage input range modified Revision 1 2 2015 05 12 Standard compliance updated Revision 1 3 2016 09 05 Voltage wiring diagram updated Revision 1 4 2017 08 07 IrDA deleted Revision 1 5 2017...

Page 7: ...plications 12 True RMS Measurements 12 Power Quality Analysis 12 Ideal for Replacing Analog Meters 12 Highly Reliable Energy Management 12 Parameters 13 Chapter 2 Mounting 14 Environmental Conditions...

Page 8: ...Cover 28 Powering Up the Meter 28 Chapter 3 Meter Operation Setup 29 Display Mode 30 Setup Mode 36 Reset Mode 38 System Mode 39 Reactive Power Calculation 41 Appendix A Specifications 43 Appendix B S...

Page 9: ...CTs Wiring Mode 3P4U 22 Fig 1 13 Single Phase 2 Wire Direct Wiring Mode 1P2U 23 Fig 1 14 Single Phase 3 Wire Direct Using 2 CTs Wiring Mode 1P3U 24 Fig 1 15 Three Phase 3 Wire Open Delta Direct Wirin...

Page 10: ...key factor that determines the reliability of energy management systems Low measurement accuracy causes inconsistency between the energy of the incoming feeder and the sum of energy measured on the l...

Page 11: ...oltage current Active power reactive power active energy reactive energy power factor frequency Fundamental component True RMS of current 4 Quadrant Power Demand peak demand Maximum Minimum 1 kWh kVAR...

Page 12: ...s both ANSI C39 1 4 Round and DIN 96 standards for installation It features the installation dimensions same as those of analog meters Thus there is no need to create cutouts on the panel when install...

Page 13: ...Total value of three phase parameters 4 If a real time value is greater than the maximum value the maximum value is updated The value measured within 10 msec after power up is ignored 5 If a real tim...

Page 14: ...Environmental Conditions Description Installation location Indoors Operating Temp 20 to 70 C 4 to 158 Storage Temp 40 to 85 C 40 to 185 Operating Humidity 5 95 non condensing Caution The meter should...

Page 15: ...meter observe the instructions in this guide and read the safety precautions presented on the Installation Considerations page Caution Power up after the voltage and current wiring is completed Meter...

Page 16: ...Page 16 Meter Dimensions Fig 1 3 Front View Fig 1 4 Rear View Fig 1 5 Side View...

Page 17: ...e meter into cutout ANSI 4 or DIN96 3 Fix the meter onto the panel by turning the mounting nut When conforming to the DIN96 standard there is no need to drill holes on the panel Fig 1 6 ANSI 4 Fig 1 7...

Page 18: ...ory Caution In three phase 3 wire open delta direct connection mode line to line voltage should not exceed 457V because the voltage is applied to the inputs of phase voltage PT Potential Transformer P...

Page 19: ...ution degree 2 Installation Category CT Current Transformer Item Description Compliance UL61010 1 and IEC 61010 1 2nd Edition Pollution Degree 2 Overvoltage Category Primary CT1 Equal to current ratin...

Page 20: ...lowing wiring diagrams may result in severe injury or death Be sure to use shorting block when connecting the meter to CT secondaries Fig 1 9 Single Phase 2 Wire Connection Wiring Mode 1P2U Caution In...

Page 21: ...3P3O Caution In three phase 3 wire open delta connection mode be sure to connect V2 to VN as the above Fig 1 11 Three Phase 3 Wire Open Delta Connection Using 3 CTs Wiring Mode 3P3O Caution In three...

Page 22: ...Page 22 Fig 1 12 Three Phase 4 Wire Connection Using 3 PTs and 3 CTs Wiring Mode 3P4U...

Page 23: ...owing wiring diagrams may result in severe injury or death Be sure to use shorting block when connecting the meter to CT secondaries Fig 1 13 Single Phase 2 Wire Direct Connection Wiring Mode 1P2U Cau...

Page 24: ...phase 3 wire mode be sure to use V1 V3 VN 1S 1L 3S 3L terminals as the above Fig 1 15 Three Phase 3 Wire Open Delta Direct Connection Wiring Mode 3P3O Caution In three phase 3 wire open delta direct...

Page 25: ...three phase 3 wire open delta direct connection mode use PTs for voltages over 457V line to line be sure to connect V2 to VN as shown above Fig 1 17 Three Phase 4 Wire Direct Connection Using 3 CTs W...

Page 26: ...3 5 mm2 24 to 14 AWG Shield twisted pair Maximum Cable Length 1219m 4000ft Maximum Devices bus 32 Note Using a UL2919 cable is recommended for communication Comm Indicator The Comm LED blinks green w...

Page 27: ...tor Screw terminal Pluggable Wire 1 25 to 3 5 mm2 24 to 14 AWG Ratings AC 85 265V 50 60Hz DC 100 300V Compliance Pollution degree 2 Burden 10VA Caution Using DC voltage is recommended for power supply...

Page 28: ...Do not use metal door hinges as a ground path Step 5 Adding the Cover Powering Up the Meter Adding the Cover Fig 1 20 Adding the Cover Powering Up the Meter 1 Close the PT fuses or direct voltage inp...

Page 29: ...the front panel Item Description Display mode View parameter measurements Setup mode Configure parameters wiring communication etc Reset mode Reset energy demand maximum and minimum System mode View m...

Page 30: ...surement Group D Measurement group C D automatically returns to A B after 30 seconds when group auto return menu item of system mode is on default Measurement Group Selection Button Function Sequentia...

Page 31: ...vious measurement group A C D Move to the next measurement group A C D Move to the next measurement group B Parameter display in the following order In Group A Three phase 4 wires Order Parameter 1 AV...

Page 32: ...A VL N Voltage a Current a kW a 3 C VL N Voltage c Current c kW c AVG TOT means Average Total Total kW phase a c Single phase 2 wires Order Parameter 1 AVG TOT VL N Voltage average Current average To...

Page 33: ...le if third row LED Digit 0029 and fourth row LED digit 38 875 then actual value 002938 875 2938 875 Mwh Parameter display in the following order In Group D Three phase 4 wires Order Parameter 1 MAX A...

Page 34: ...imum 3 MAX B VL L Line voltage bc maximum Current b maximum 4 MAX C VL L Line voltage ca maximum Current c maximum 5 DMD A Current a demand 6 DMD B Current b demand 7 DMD C Current c demand 8 DMD AVG...

Page 35: ...e c THD Current c THD AVG TOT means Average Total Total kW phase a c Single phase 2 wires Order Parameter 1 MAX AVG TOT VL N Voltage average maximum Current average maximum Total kW maximum 2 MAX A VL...

Page 36: ...t setup mode and move to display mode Shows that the value of menu item can be changed Button Functions in Setup Edit Mode Button Function Increase the value of menu item decrease the value of menu it...

Page 37: ...47 5 Protocol Modbus RTU Rootech 6 Speed bps 1200bps 2400bps 4800bps 9600bps 19200bps 38400bps 57600bps 7 Parity bits Even parity Odd parity None parity 8 Stop bits 1 2 1 Available only for the manufa...

Page 38: ...same time Move to the previous menu screen Move to the next menu screen 1st Enter Blink shows that it s possible to rest 2nd Enter reset menu item and return to reset mode Exit reset mode and move to...

Page 39: ...lay mode Shows that the value of menu item can be changed Button Functions in System Edit Mode Button Function Increase the value of menu item decrease the value of menu item Save the edited value of...

Page 40: ...cally returns to A B after 30 seconds when group auto return menu item is on default When operated in demo mode SETUP LED blinks The displayed measurement data in the demo mode are not actual measurem...

Page 41: ...V T P 0 1 c b a P P P P T a T a a dt t I t V T Q 0 4 1 T b T b b dt t I t V T Q 0 4 1 T c T c c dt t I t V T Q 0 4 1 c b a Q Q Q Q 2 2 Q P S S P PF 2 2 a a a Q P S 2 2 b b b Q P S 2 2 c c c Q P S a a...

Page 42: ...f vector apparent power T a a a dt t I t V T P 0 1 T b b b dt t I t V T P 0 1 T c c c dt t I t V T P 0 1 c b a P P P P arms arms a I V S brms brms b I V S crms crms c I V S 2 2 a a a P S Q 2 2 b b b P...

Page 43: ...n 0 02VA phase 220V Pickup Voltage 25V per phase Impedance 3M phase Wire spec 2 1 to 3 5 mm2 14 to 12 AWG Current Input Rating Input 5A nominal 10A full scale 3 Calibration 0 05 10A phase Burden Max 0...

Page 44: ...D IEC 61326 1 IEC 61000 4 3 EM Field IEC 61326 1 IEC 61000 4 4 Electric Fast Transient IEC 61326 1 IEC 61000 4 5 Surge Immunity IEC 61326 1 IEC 61000 4 6 Conducted RF Immunity IEC 61326 1 IEC 61000 4...

Page 45: ...0 2 Reading Current 0 000 9999A kA 0 2 Reading Power Active 0 000 9999kW MW Class 0 5S Reactive 0 000 9999kVar MVar 0 5 Reading Apparent1 0 000 9999kVA MVA 0 5 Reading Energy2 Active 0 999 999 999kWh...

Page 46: ...ty Test IEC 61326 Electrical Equipment for Measurement Control and Laboratory Use EMC Standard Limit Accura 3300S IEC 61000 4 2 Electrostatic Discharge ESD 4kV 8kV contact air 12kV 20kV IEC 61000 4 3...

Page 47: ...Page 47...

Page 48: ...Reserved Accura 3300S User Guide Digital Power Meter Accura 2300 2350 Accura 2300S 2350 Accura 2500 2550 Accura 2700 2750 Accura 3000 Accura 3300E Accura 3300S 3300 Accura 3500S 3500 Accura 3550S 355...

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