WattNode WNC-3Y-208-MB Installation And Operation Manual Download Page 62

62 Warranty

The accuracy of the solid-core CTs is specified from 10% to 100% of rated current. The phase 
angle error is specified at 50% of rated current. The CT suffix 

xxx

 is the rated current. The “N” at 

the end of the part number indicates a nickel core material, which is the only core material avail-
able for our solid-core CTs.

Model

Inside 

Diameter

Rated Amps (-xxx)

Accuracy / 

Phase Angle

Maximum 

Amps

CTT-0300-xxxN

0.30" (7.6mm)

5, 15, 20, 30

±1% / <1°

30

CTT-0500-xxxN

0.50" (12.7mm)

15, 20, 30, 50, 60

±1% / <1°

60

CTT-0750-xxxN

0.75" (19.0mm)

30, 50, 70, 100

±1% / <1°

100

CTT-1000-xxxN

1.00" (25.4mm)

50, 70, 100, 150, 200

±1% / <1°

200

CTT-1250-xxxN

1.25" (31.7mm)

70, 100, 150, 200, 250, 300, 400

±1% / <1°

400

Table 17: Solid-core CTs

Warranty

All products sold by Continental Control Systems, LLC (CCS) are guaranteed against defects in 
material and workmanship for a period of three years from the original date of shipment. CCS’s 
responsibility is limited to repair, replacement, or refund, any of which may be selected by CCS at 
its sole discretion. CCS reserves the right to substitute functionally equivalent new or serviceable 
used parts.

This warranty covers only defects arising under normal use and does not include malfunctions or 
failures resulting from: misuse, neglect, improper application, improper installation, water damage, 
acts of nature, lightning, product modifications, alterations or repairs by anyone other than CCS.

Except as set forth herein, CCS makes no warranties, expressed or implied, and CCS 
disclaims and negates all other warranties, including without limitation, implied warranties 
of merchantability and fitness for a particular purpose.

Limitation of Liability

In no event shall CCS be liable for any indirect, special, incidental, punitive or consequen-
tial damages of any kind or nature arising out of the sale or use of its products whether 
such liability is asserted on the basis of contract, tort or otherwise, including without 
limitation, lost profits, even if CCS has been advised of the possibility of such damages.

Customer acknowledges that CCS’s aggregate liability to Customer relating to or arising 
out of the sale or use of CCS’s products, whether such liability is asserted on the basis of 
contract, tort or otherwise, shall not exceed the purchase price paid by Customer for the 
products in respect of which damages are claimed.  Customer specifically acknowledges 
that CCS’s price for the products is based upon the limitations of CCS’s liability set forth 
herein.

Summary of Contents for WNC-3Y-208-MB

Page 1: ...Modbus Installation and Operation Manual WNC 3Y 208 MB WNC 3Y 400 MB WNC 3Y 480 MB WNC 3Y 600 MB WNC 3D 240 MB WNC 3D 400 MB WNC 3D 480 MB http www ccontrolsys com Continental Control Systems LLC Rev...

Page 2: ...eived including interference that may cause undesired operation The FCC limits are designed to provide reasonable protection against harmful interference in a residential installation This equipment g...

Page 3: ...onnecting Current Transformers 17 Circuit Protection 18 Connecting Voltage Terminals 19 Setting the Modbus Address 19 Baud Rate 20 Connecting Modbus Outputs 20 Planning the Modbus Network 20 Installat...

Page 4: ...Energy 42 Negative Energy 43 Reactive Energy 43 Apparent Energy 43 Power Factor 43 Reactive Power 44 Apparent Power 44 Current 45 Demand 45 IO Pin Options 47 Configuration Registers 47 Demand Configu...

Page 5: ...itoring the phase A B and C values If necessary you can use different CTs on the different circuits Communication The WattNode meter uses a half duplex EIA RS 485 interface for communication The stand...

Page 6: ...he X terminal Option SSR Provides a solid state relay contact closure output between the X and C terminals for load shedding and other applications Special Options Contact the factory about the follow...

Page 7: ...meter accuracy C Neutral This terminal N should be connected to neutral when available D E F Line voltage inputs These terminals connect to the A phase A B phase B and C phase C electric mains On wye...

Page 8: ...ply voltage for this model The V indicates AC voltage For wye models this voltage should appear between the N and A terminals For delta models this voltage should appear between the A and B terminals...

Page 9: ...t ratings 5 Ensure that the line voltage inputs to the meter have either fuses or circuit breakers on each voltage phase not needed for the neutral wire See Circuit Protection pg 18 for details 6 Equi...

Page 10: ...eutral 3 Phase 3 Wire Delta 208V no neutral 3 Phase 4 Wire Wye 120V 208V with neutral 3 Phase 4 Wire Delta 120 208 240V with neutral WNC 3D 400 MB Delta or Wye 230 Vac 400 Vac 3 Phase 3 Wire Delta 400...

Page 11: ...Single Phase Three Wire Connection Recommended WattNode Models The following table shows the WattNode models that can be used If neutral may or may not be present you should use the WNC 3D 240 MB see...

Page 12: ...del This configuration is normally measured with the following WattNode model Line to Line Voltage WattNode Model 208 240 Vac WNC 3D 240 MB If neutral is available you may also use the WNC 3Y 208 MB m...

Page 13: ...ine to Neutral Voltage Line to Line Voltage WattNode Model 120 Vac 208 Vac WNC 3Y 208 MB 230 Vac 400 Vac WNC 3Y 400 MB 277 Vac 480 Vac WNC 3Y 480 MB 347 Vac 600 Vac WNC 3Y 600 MB Note you may also use...

Page 14: ...Recommended WattNode Models The following table shows the WattNode models that should be used depending on the line to line voltage also called phase to phase voltage Line to Line Voltage WattNode Mod...

Page 15: ...nd attaching a note to the meter indicating this configuration for future reference Mounting Protect the WattNode meter from moisture direct sunlight high temperatures and conductive pollution salt sp...

Page 16: ...multimeters and the WattNode meter Resistive loads like heaters and incandescent lights have nearly sinusoidal current waveforms with a crest factor near 1 4 Power factor corrected loads like computer...

Page 17: ...LEDs Be careful to match up the current transformers to the voltage phases being measured Make sure the A CT is measuring the line voltage connected to A and the same for phases B and C Use the suppli...

Page 18: ...r this earth connection is not used for safety protective earthing For solid core CTs disconnect the line voltage conductor to install it through the CT opening Split core and bus bar CTs can be opene...

Page 19: ...in the white box on the meter front label When power is first applied to the meter check that the LEDs behave normally see Installation LED Diagnostics pg 23 below if you see the LEDs flashing red gre...

Page 20: ...4 to the ApplyComConfig 1651 register to apply the new address 2 Set the address with the Address register Set the DIP switches to any non zero address so the meter won t reset the address to the fact...

Page 21: ...you may use stubs or branches Long stubs or branches greater than 30 m 100 ft may cause signal reflections and should be avoided Termination Networks shorter than 500 m 1650 ft should not need termina...

Page 22: ...g communication problems If you are using shielded cable you may use the shield to provide the Modbus common C connection between all devices on the network Connect the cable shield or Modbus common i...

Page 23: ...hase if line Vac is present but the measured power is below the minimum that the meter will measure see Creep Limit pg 58 the meter will display solid green for that phase Inactive Phase If the meter...

Page 24: ...hift between voltage and current resulting in a low power factor and probably negative power Yellow red flashing negative power is less common and indicates incorrect installation unless you are gener...

Page 25: ...inal operating voltages printed in the white rectangle on the front label Meter Error If the meter experiences an internal error it will light all LEDs red for three seconds Check the ErrorStatus 1710...

Page 26: ...k the measured power for each active phase PowerA PowerB PowerC If possible estimate or measure the actual power Also make sure the load you are measuring is currently on If one or more active phases...

Page 27: ...lled properly Check for CTs touching each other or pre existing CTs CT opening too large for the wire being measured The voltage phases green screw terminal block are not matched up with the current p...

Page 28: ...he measured power factor or reactive power appears to be outside the normal ranges this most commonly indicates that the voltage and current phases on the meter are not connected properly although som...

Page 29: ...e second for any of the following errors the ErrorStatus registers will also be set but depending on the problem you may not be able to read register values CRC error this could indicate noise on the...

Page 30: ...rrorStatus 211 212 The Modbus packet contained an invalid count of registers or an invalid byte count 04 Slave device failure ErrorStatus 200 The correct ConfigPasscode must be entered before changing...

Page 31: ...ive amps Set the CtAmps 1603 register to the correct rated CT amps of your current transformers For example if you are using 100 A CTs write 100 to register 1603 16 bit integer register Verify Operati...

Page 32: ...odbus protocol is a master slave protocol with only one master and many slaves The WattNode meter is always a slave device and responds only when queried Modbus on EIA RS 485 allows for either full du...

Page 33: ...600 MB WNC 3D 240 MB Continental Control Systems LLC WattNode MODBUS WNC 3D 240 MB WNC 3D 400 MB Continental Control Systems LLC WattNode MODBUS WNC 3D 400 MB WNC 3D 480 MB Continental Control Systems...

Page 34: ...t values have a limitation the effective resolution in kWh gets lower as more energy accumulates If the total energy exceeds 100 000 kWh the resolution of the floating point energy will become coarser...

Page 35: ...to line phase A to B 1029 1030 VoltBC V RMS voltage line to line phase B to C 1031 1032 VoltAC V RMS voltage line to line phase A to C Frequency Register 1033 1034 Freq Hz Power line frequency These r...

Page 36: ...rectional energy phase A 1103 1104 EnerygB kWh Net bidirectional energy phase B 1105 1106 EnergyC kWh Net bidirectional energy phase C 1107 1108 EnergyPosA kWh Positive energy phase A 1109 1110 Energy...

Page 37: ...ist Integer These registers provide advanced integer measurements The energy registers are 32 bit signed dual registers the first register provides the lower 16 bits and the second register provides t...

Page 38: ...1356 DemandMax PowerIntScale Maximum power demand 1357 DemandApp PowerIntScale Apparent power demand 1358 DemandA PowerIntScale Real power demand phase A 1359 DemandB PowerIntScale Real power demand...

Page 39: ...ni cation Registers pg 51 below for details Registers Name Default Description 1651 ApplyComConfig 0 Writing 1234 applies the configuration settings below Reads 1 if changes not applied yet 1652 Addre...

Page 40: ...tCtAmpsB CtAmpsB Option CT phase B CtAmps 1726 OptCtAmpsC CtAmpsC Option CT phase C CtAmps 1727 OptModbusMode ModbusMode Option TCP RTU for Modbus protocol 1728 OptAddress Address Option AD Modbus add...

Page 41: ...is value is appropriate for net metering applications i e photovol taic where you wish to measure the net energy in situations where you may sometimes consume energy and other times generate energy Us...

Page 42: ...se registers as estimates of the line to line voltage In order to estimate these voltages the meter must know the phase offset or the type of electrical service see PhaseOffset configuration register...

Page 43: ...egisters that can count up or down depending on the sign of the reactive power The WattNode meter only measures the fundamental reactive energy not including harmonics These values are reset to zero w...

Page 44: ...PowerReacB PowerReacC or PowerReacSum to VARs use the following equation PowerReac VAR PowerReacSum PowerIntScale For example if PowerIntScale 1609 is 100 and the integer PowerReacSum 1343 reports 15...

Page 45: ...to 720 minutes 12 hours The meter records the peak demand for metering applications where the measurements may only be accessed weekly or monthly Since the WattNode meter can measure bidirectional pow...

Page 46: ...w ing equation Demand W Demand PowerIntScale For example if PowerIntScale 1609 is 100 and the integer Demand 1354 reports 4700 then the demand is 4700 100 470 000 watts or 470 kW Demand Subinterval De...

Page 47: ...code contact support for assistance 0 Unlocked 1 Locked Invalid unlock attempts will result in the Modbus exception 03 Illegal data value and prevent more attempts for five seconds An unlocked meter w...

Page 48: ...ications So if the status LED for a phase was flashing red and you flip the CT with CtDirections the LED will change to green flashing This cannot be used to correct for situations where CT phases do...

Page 49: ...urrent values so that a current equal to the CT rated amps will result in an output value of CurrentIntScale The default CurrentIntScale is 20000 See CurrentA CurrentB CurrentC for more details Demand...

Page 50: ...ower below MinimumPower is forced to zero FullScalePower is defined as the nominal line to neutral VAC see Specifications Models pg 56 multiplied by the full scale or rated CT current Generally the de...

Page 51: ...u may want to use the broadcast address 0 so that all meters will update together This isn t permitted for setting the address because then multiple devices would share the same address The communicat...

Page 52: ...col In order to make this work the meter can switch to the Modbus TCP IP protocol still using RS 485 which is nearly identical to Modbus RTU but with a different header and no CRC bytes TCP IP has a b...

Page 53: ...or an RS 485 bus collision PacketErrorCount 1714 This counts up to 32767 the number of Modbus packets that could not be parsed OverrunCount 1715 This counts up to 32767 the number of times the Modbus...

Page 54: ...nergySumNR register overflowed 100 gigawatt hours reset to 0 89 90 91 INFO EnergyReacA B C registers overflowed 100 gigawatt hours reset to 0 92 INFO EnergyReacSum register overflowed 100 gigawatt hou...

Page 55: ...on the bus or packets longer than 256 bytes 251 WARNING RS 485 receiver error Generally caused by baud rate mismatch parity mode mismatch or electrical interference 252 253 WARNING Short Modbus packe...

Page 56: ...psC This is used if non matching CTs are connected to different phases Communication Options Option EP Factory configure the Modbus RS 485 communications to even parity E81 Parity even Data bits 8 Sto...

Page 57: ...on 1 Normal Operation Line voltage 20 to 15 of nominal Power factor 1 0 Frequency 48 62 Hz Ambient Temperature 25 C CT Current 5 100 of rated current Accuracy 0 5 of reading Condition 2 Low CT Current...

Page 58: ...oltage for a phase drops below 20 of nominal Vac the output power for the phase will be set to zero These limits prevent spurious readings due to measurement noise To customize the creep limit see Cre...

Page 59: ...13 Power Supply Characteristics Maximum Operating Power Supply Voltage Range 20 to 15 of nominal see table above For the WNC 3D 240 MB this is 20 of 208 Vac 166 Vac to 15 of 240 Vac 276 Vac Operating...

Page 60: ...e an electrical enclosure Hammond Mfg Type EJ Series that is rated NEMA 3R or 4 IP 66 Mechanical Enclosure High impact ABS and or ABS PC plastic Flame Resistance Rating UL 94V 0 IEC FV 0 Size 143 mm 8...

Page 61: ...as bus bar CTs because they are available in larger and custom sizes appropriate for use with bus bars or multiple large conductors These are UL recognized under UL file number E325972 CTB wwwXhhh xx...

Page 62: ...ising under normal use and does not include malfunctions or failures resulting from misuse neglect improper application improper installation water damage acts of nature lightning product modification...

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