WattNode Pulse
®
Electric Power Meter - Installation Manual
WattNode Pulse
Models
WattNode Revenue
Pulse Models
WNB-3Y-208-P
WNB-3Y-400-P
WNB-3Y-480-P
WNB-3Y-600-P
WNB-3D-240-P
WNB-3D-400-P
WNB-3D-480-P
RWNB-3Y-208-P
RWNB-3Y-400-P
RWNB-3Y-480-P
RWNB-3Y-600-P
RWNB-3D-240-P
RWNB-3D-400-P
RWNB-3D-480-P
www.ctlsys.com
Contents
1Precautions...............................................................................................................................3
1.9Symbols......................................................................................................................................3
2Overview....................................................................................................................................3
2.1 Additional Literature....................................................................................................................3
2.2 Electrical Service Types.............................................................................................................4
3Installation.................................................................................................................................7
3.1 Installation Checklist...................................................................................................................7
3.2Mounting.....................................................................................................................................7
3.3 Connect Voltage Terminals.........................................................................................................7
3.4 Connect Current Transformers...................................................................................................8
3.5 Connect the Output Signals........................................................................................................9
4Operation.................................................................................................................................10
4.1 Initial Configuration...................................................................................................................10
4.2 Power Status LEDs...................................................................................................................10
4.3Monitoring................................................................................................................................. 11
4.4 Pulse Scale Factors.................................................................................................................. 11
4.5 Maintenance and Repair...........................................................................................................12
5Specifications.........................................................................................................................12
5.1Accuracy...................................................................................................................................12
5.2Measurement............................................................................................................................ 13
5.3 Models and Electrical...............................................................................................................13
5.4 Pulse Outputs........................................................................................................................... 14
5.5Certifications.............................................................................................................................14
5.6Environmental...........................................................................................................................15
5.7Mechanical................................................................................................................................15
5.8 FCC Information........................................................................................................................15
5.9Warranty....................................................................................................................................16
5.10 Limitation of Liability.................................................................................................................16
2
1 Precautions
1.1 Only qualified personnel or licensed electricians should install the WattNode meter. The
mains voltages of 120 to 600 Vac can be lethal!
1.2 Follow all applicable local and national electrical and safety codes.
1.3 The terminal block screws are not insulated. Do not contact metal tools to the screw terminals
if the circuit is live!
1.4 Verify that circuit voltages and currents are within the proper range for the meter model.
1.5 Use only UL Listed or UL Recognized current transformers (CTs) with built-in burden resistors,
that generate 0.333 Vac (333 millivolts AC) at rated current. Do not use current output (ratio) CTs such as 1 amp or 5 amp output CTs: they will destroy the meter and may create
a shock hazard.
1.6 Protect the line voltage conductors to the meter with fuses or circuit breakers (not needed for
the neutral or ground wires). See 3.3.1 below.
1.7 Equipment must be disconnected from the HAZARDOUS LIVE voltages before access.
1.8 If the meter is not installed correctly, the safety protections may be impaired.
1.9 Symbols
Read, understand, and follow all instructions including warnings and precautions
before installing and using the product.
Potential Shock Hazard from Dangerous High Voltage.
Functional ground; should be connected to earth ground if possible, but is not
required for safety grounding.
UL Listing mark for U.S.A. and Canada.
FCC Mark. This logo indicates compliance with part 15 of the FCC rules.
Complies with the regulations of the European Union for Product Safety and
Electro-Magnetic Compatibility.
• Low Voltage Directive – EN 61010-1:2010 (3rd Edition)
• EMC Directive – EN 61326-1:2013
V~
This indicates an AC voltage.
2 Overview
Congratulations on your purchase of the WattNode ® Pulse or WattNode ® Revenue for Pulse watt/
watt-hour transducer. It is designed for use in demand side management (DSM), submetering,
energy monitoring, billing and renewable energy applications.
The WattNode Revenue (RWNB) version meets the ANSI C12.1 standard for revenue metering
when used with IEEE C57.13 class 0.6 current transformers, such as the Accu-CT®.
2.1 Additional Literature
See the Continental Control Systems, LLC website (www.ctlsys.com) for product pages,
datasheets, and support pages for all WattNode meter models and current transformers. Each
WattNode model has an Operating and Reference Guide with detailed information on the available measurements and interface.
3
WHITE
BLACK
WHITE
BLACK
WHITE
BLACK
Input or Positive
Common
WATTNODE ® PULSE
P3
P2
P1
COM
Output
Monitoring Equipment or Display
Ground
WNB- 3Y-xxx-P
WNB-3D-xxx-P
N
ØA CT
Status
ØA
ØB CT
Status
ØB
ØC CT
Status
ØC
Source
Faces
Phase A
Phase C
Current
Transformers
LINE
LOAD
Phase B
Neutral
Figure 1: WattNode Wiring Diagram
2.2 Electrical Service Types
1 Phase 2 Wire 120V with neutral
1 Phase 2 Wire 230V with neutral (non-N.A.)
1 Phase 2 Wire 277V with neutral
1 Phase 2 Wire 208V no neutral
1 Phase 2 Wire 240V no neutral
Line-toNeutral
(Vac)
96 – 138
184 – 264
222 – 318
n.a.
n.a.
Line-toLine
(Vac)
n.a.
n.a.
n.a.
166 – 276
166 – 276
1 Phase 3 Wire 120V/240V with neutral
96 – 138
166 – 276
3 Phase 3 Wire Delta 208V no neutral
3 Phase 3 Wire Delta 400V no neutral (nonN.A.)
3 Phase 3 Wire Delta 480V no neutral
n.a.
166 – 276
Meter
Service
Type
3Y-208
3Y-400
3Y-480
3D-240
3D-240
3Y-208
3D-240
3D-240
n.a.
320 – 460
3D-400
n.a.
384 – 552
3 Phase 4 Wire Wye 120V/208V with neutral
96 – 138
166 – 276
3D-480
3Y-208
3D-240
ØA and ØB
N and ØA
ØA and ØB
3 Phase 4 Wire Delta 120/208/240V with
neutral
96 – 138
166 – 276
3D-240
ØA and ØB
3 Phase 4 Wire Wye 230V/400V with neutral
(non-N.A.)
184 – 264
320 – 460
3 Phase 4 Wire Wye 277V/480V with neutral
222 – 318
384 – 552
3Y-400
3D-400
3Y-480
3D-480
N and ØA
ØA and ØB
N and ØA
ØA and ØB
222 – 318
384 – 552
3D-480
ØA and ØB
278 – 399
480 – 690
3Y-600
N and ØA
Electrical
Service (or Load) Types
3 Phase 4 Wire Delta 240/415/480V with
neutral
3 Phase 4 Wire Wye 347V/600V with neutral
Table 1: WattNode Models
4
Meter
Powered
by
N and ØA
N and ØA
N and ØA
ØA and ØB
ØA and ØB
N and ØA
ØA and ØB
ØA and ØB
ØA and ØB
Table 1 above lists the WattNode models and common circuit types. In the “Electrical Service
Types” column, when two voltages are listed with a slash between them, they indicate the line-toneutral / line-to-line voltages. The “Line-to-Neutral” and “Line-to-Line” columns show the operating
ranges for the WattNode meters. “non-N.A.” refers to non-North American electrical services.
Connect the line voltages to the meter inputs as shown in the following figures for each service
type. See Figure 1 above for an overview.
2.2.1 Single-Phase Two-Wire with Neutral
This is a common residential and branch circuit connection. Up to three such circuits may be monitored with one meter by also using the ØB and ØC inputs.
WATTNODE ®
Ground
Neutral
Line
N
ØA
ØB
ØC
2.2.2 Single-Phase Two-Wire No Neutral
This circuit occurs in residential (commonly 120/240 Vac) and some commercial applications.
The meter is powered from the ØA and ØB terminals. We recommend connecting the N terminal
to ground to provide a clean voltage reference for the measurement circuitry (no current will flow
through this terminal).
WATTNODE ®
Ground
N
ØA
L1
ØB
L2
ØC
2.2.3 Single-Phase Three-Wire with Neutral
This is a common residential service at 120/240 Vac.
WATTNODE ®
ØA
Ground
Neutral
L1
ØB
L2
N
ØC
2.2.4 Three-Phase Three-Wire Delta No Neutral
This is common in commercial and industrial settings. In some cases, the service may be fourwire, wye but the load may only be three wire (no neutral).
Occasionally, a load will only be connected to two of the three lines (say L1 and L2). For this case,
connect the two active lines to the ØA and ØB terminals and connect two CTs for the two lines.
5
WATTNODE ®
Ground
N
ØA
L1
ØB
L2
ØC
L3
2.2.5 Three-Phase Four-Wire Wye with Neutral
This is a common commercial and industrial service.
WATTNODE ®
ØA
Ground
Neutral
L1
ØB
L2
ØC
L3
N
2.2.6 Three-Phase Four-Wire Delta with Neutral (Wild Leg)
The uncommon four-wire delta electrical service is a three-phase delta service with a center-tap
on one of the transformer windings to create a neutral for single-phase loads.
The high-leg or phase with the higher voltage as measured to neutral has traditionally been designated “Phase B”. A change to the 2008 NEC now allows the high leg of a four-wire three-phase
delta service to be labeled as the “C” phase instead of the “B” phase. The WattNode meter will
work correctly with the high-leg connected to ØA, ØB, or ØC.
See the web article Four Wire Delta Circuits for more information.
WATTNODE ®
ØA
Ground
Neutral
L1
ØB
L2
ØC
L3
N
2.2.7 Grounded Leg Service
In rare cases with delta services or single-phase two-wire services without neutral, one of the
phases may be grounded.
The WattNode meter will correctly measure services with a grounded leg, but the measured
voltage and power for the grounded phase will be zero and the status LEDs will not light for the
grounded phase, because the voltage is near zero. Also, this type of service may result in unusual
power factors.
See the web article Corner Grounded Delta Circuits for more information.
6
3 Installation
3.1 Installation Checklist
See the sections referenced below for installation details.
□□ Turn off power before making line voltage connections.
□□ Mount the WattNode meter (see 3.2).
□□ Connect circuit breakers or fuses and disconnects (see 3.3.1).
□□ Connect the line voltage wires to the meter’s green terminal block (see 3.3.2).
□□ Mount the CTs around the line conductors. Make sure the CTs face the source (see 3.4).
□□ Connect the twisted white and black wires from the CTs to the black terminal block on the
meter, matching the wire colors to the white and black dots on the meter label (see 3.4.1).
□□ Check that the CT phases match the line voltage phases (see 3.4).
□□ Record the CT rated current for each meter, because it will be required during commissioning.
□□ Connect the output terminals of the WattNode meter to the monitoring equipment (see 3.5).
□□ Check that all the wires are securely installed in the terminal blocks by tugging on each wire.
□□ Turn on power to the meter.
□□ Verify that the LEDs indicate correct operation (see 4.2).
3.2 Mounting
●● Protect the meter from temperatures below –40°C (-40°F) or above 75°C (167°F), excessive
moisture, dust, salt spray, or other contamination, using a NEMA rated enclosure if necessary.
The meter requires an environment no worse than pollution degree 2 (normally only non-conductive pollution; occasionally, a temporary conductivity caused by condensation).
●● The meter must be installed in an electrical service panel or an enclosure.
●● Do not use the meter as a drilling guide; the drill chuck can damage the screw terminals and
metal shavings may fall into the connectors.
The meter has two mounting holes spaced 5.375 in. (137 mm) apart (center-to-center). These
mounting holes are normally obscured by the detachable screw terminals. Remove the screw
terminals to mark the hole positions and mount the meter.
Self-tapping #8 sheet metal screws are included. Don’t over-tighten the screws, as long-term
stress on the case can cause cracking.
3.3 Connect Voltage Terminals
3.3.1 Circuit Protection
The WattNode meter is considered “permanently connected equipment” and requires a disconnect
means (circuit breaker, switch, or disconnect) and overcurrent protection (fuse or circuit breaker).
The meter only draws 10-30 milliamps, so the rating of any disconnect switch, fuses, and/or circuit
breakers is determined by the wire gauge, the mains voltage, and the current interrupting rating
required.
●●
●●
●●
●●
The disconnect or circuit breaker must be clearly marked, suitably located, and easily reached.
Use circuit breakers or fuses rated for 20 amps or less.
Use ganged circuit breakers when monitoring more than one line voltage.
The circuit breakers or fuses must protect the mains terminals labeled ØA, ØB, and ØC. In the
rare cases where neutral has overcurrent protection, then the overcurrent protection device
must interrupt both neutral and the ungrounded conductors simultaneously.
●● The circuit protection / disconnect system must meet IEC 60947-1 and IEC 60947-3, as well as
all national and local electrical codes.
7
3.3.2 Line Wiring
● Always turn off power before connecting the line voltage inputs to the meter.
● For the line voltage wires, CCS recommends 16 to 12 AWG stranded wire, type THHN, MTW,
or THWN, 600 V.
●● Do not place more than one voltage wire in a screw terminal; use separate wire nuts or terminal blocks if needed.
● Verify that the line voltages are in range of the line-to-line Ø-Ø and line-to-neutral Ø-N values
printed in the white box on the front label.
The screw terminals handle wire up to 12 AWG. Connect each voltage line to the green terminal
block as shown in Figure 1 above. After the voltage lines have been connected, make sure both
terminal blocks are fully seated in the meter.
Connect each line voltage to the appropriate phase; also connect ground and neutral (if applicable). The neutral connection “N“ is not required on delta models (3D-240, 3D-400, and 3D-480),
but we recommend connecting it to ground if neutral is not present.
When power is first applied, check that the LEDs behave normally. If you see LEDs flashing redgreen-red-green (see Figure 7), the line voltage is too high for this model, so disconnect the power
immediately!
3.3.3 Grounding
The WattNode uses a plastic enclosure, insulation, and internal isolation barriers instead of
protective earthing. The ground terminal on the green screw terminal block is a functional ground,
designed to improve the measurement accuracy and noise immunity. If necessary, this terminal
may be left disconnected on wye models (-3Y).
3.4 Connect Current Transformers
To meet the UL listing requirements, the WattNode Pulse meter may only be used with UL Listed
CTs with a 333 mVac output or the following UL Recognized current transformer models, which all
generate 333 millivolts AC at rated current. See the current transformer datasheets for CT ratings.
ACT-0750-xxx
CTS-2000-xxxx
CTT-1000-xxx
CTL-1250-xxx
CTB-WxL-xxxx
CTT-1250-xxx
CTM-0360-xxx
CTT-0300-xxx
CTRC-yyyyy-xxxx
CTS-0750-xxx
CTT-0500-xxx
CTS-1250-xxx
CTT-0750-xxx
●● “xxx” indicates the full scale current rating.
●● “WxL” indicates the opening width (W) and leg length (L) in inches.
●● “dddd” indicates the opening diameter of the loop for flexible Rogowski CTs.
●● “yyyyy” indicates the opening size in mils (thousandths of inches).
See the web article Selecting Current Transformers for information on selecting appropriate
current transformers (CTs).
●● Do not use ratio or current output CTs such as 1 amp or 5 amp output models!
●● See the CT datasheets for the maximum input current ratings.
●● Be careful to match the CTs with the voltage phases. Make sure the ØA CT is measuring the
current on the same phase as the ØA voltage input, and the same for phases B and C. Use the
supplied colored labels or colored tape to identify the CT leads.
●● To minimize current measurement noise, avoid extending the CT wires, especially in noisy
environments. If it is necessary to extend the wires, use twisted pair wire 22 to 14 AWG, rated
for 300 V or 600 V (not less than the service voltage) and shielded if possible.
●● Find the source arrow or label “THIS SIDE TOWARD SOURCE” on the CT and face/point
toward the source of current.
●● OPTIONAL: if you see spurious readings on unused phases, jumper the unused CT inputs:
for each unused CT, connect a short wire from the terminal marked with a white dot to the
terminal marked with a black dot.
8
Install the CTs around the conductor to be measured and connect the CT leads to the meter. Always turn off power before disconnecting any live conductors.
Split-core CTs can be opened for installation around a conductor. A nylon cable tie may be secured around the CT to prevent inadvertent opening. If using solid-core CTs, put the line conductors through the CTs as shown in Figure 1 on page 4 above.
CTs are directional. If they are mounted backwards or with their white and black wires swapped the
measured power will be negative. The status LEDs indicate negative measured power by flashing
red.
When installing WattNode Revenue models, be sure to only use IEEE C57.13 class 0.6 current
transformers, such as the Accu-CT; other CTs are less accurate and may not provide revenue accuracy. Contact sales for more information on appropriate CTs.
3.4.1 CT Wiring
The current transformers connect to the six position black screw terminal block. Connect the
white and black CT wires to the meter terminals marked ØA CT, ØB CT , and ØC CT (see Figure 1
above). Excess length may be trimmed from the wires if desired. Connect each CT with the white
wire aligned with the white dot on the label, and the black wire aligned with the black dot. Note
the order in which the phases are connected, as the line voltage phases must match the current
phases for accurate power measurement.
3.5 Connect the Output Signals
●● The meter outputs are electrically isolated from dangerous voltages.
●● If the output wiring is near line voltage wiring, use wires or cables with a 300 V or 600 V rating
(not less than the service voltage).
●● If the output wiring is near bare conductors, it should be double insulated or jacketed.
●● You may install two wires into each screw terminal by twisting the wires together, inserting
them into terminal, and securely tightening. Note: a loose wire can disable an entire network
section.
●● Use shielded twisted-pair cable to prevent interference. If there is no common conductor, connect the shield to the C terminal.
3.5.1 WattNode Pulse Outputs
Use the following directions when connecting the pulse outputs of a WattNode Pulse meter.
●● The outputs P1, P2, and P3 should not be connected to negative voltages, or to voltages
greater than +60 Vdc. For reliable operation, limit the current to 5 mA.
●● For long distances, use shielded twisted-pair cable to prevent interference. With shielded
cable, connect the shield to earth ground at one end.
●● If you need to add pull-up resistors to limit current, see the Operating and Reference Guide.
The WattNode pulse outputs may be connected to most devices that expect a contact closure or
relay input. See the Operating and Reference Guide for more complex connection information.
WATTNODE
Monitoring Equipment
or Display
Input (Positive)
Input (Positive)
Input (Positive)
Common
Output
P3
P2
P1
COM
The following table shows the pulse output channel assignments for the standard bidirectional
outputs and for optional output configurations. See the website article WattNode Pulse - Options
for more details on available options.
9
Pulse
Outputs
P1
Output
P2
Output
P3
Output
Standard Outputs Bidirectional
Positive energy
- all phases
Negative energy
- all phases
Not used
Option P3
Per-Phase Outputs
Phase A
positive energy
Phase B
positive energy
Phase C
positive energy
Option PV
Photovoltaic
Phase A+B pos.
energy
Phase A+B neg.
energy
Phase C
positive energy
Option DPO Dual
Positive Outputs
Positive energy
- all phases
Negative energy
- all phases
Positive energy
- all phases
Table 2: Pulse Output Assignments
4 Operation
4.1 Initial Configuration
For WattNode Pulse meters, the only required configuration will be in the data logger or pulse
counting device, which must be configured with the correct scale factors to convert from pulses to
energy (kWh).
For details on configuring the WattNode meter, see the appropriate Operating and Reference
Guide for your model.
The meter does not include a display or buttons, so it is not possible to configure or monitor the
meter directly, other than the basic LED diagnostics described below.
4.2 Power Status LEDs
The three status LEDs on the front of the meter can help indicate correct measurements and operation. The “A”, “B”, and “C” on the diagrams indicate the three phases.
4.2.1 Normal Startup
The meter displays the following startup sequence whenever power is first applied.
A
B
C
Red
Yellow
Green
Red
Yellow
Green
Red
Yellow
Green
1.0sec
1.0sec
1.0sec
4.2.2 Positive Power
Any phase with the LEDs flashing green is indicating normal positive power.
Green
Off
Green
Off
Green
Off
4.2.3 No Power
Any phase with a solid green LED indicates no power, but line voltage is present.
Green
4.2.4 No Voltage
Any phase LED that is off indicates no voltage on that phase.
Off
4.2.5 Negative Power
Red flashing indicates negative power for that phase. Reversed CTs, swapped CT wires, or CTs
not matched with line voltage phases can cause this.
10
C
Red
Off
Red
Off
Red
Off
4.2.6 Overvoltage Warning
The following indicates that the line voltage is too high for this model. Disconnect power immediately! Check the line voltages and the meter ratings (in the white box on the label).
A
B
C
R G R G R G R G R G R G
R G R G R G R G R G R G
R G R G R G R G R G R G
1.0sec
4.2.7 Meter Not Operating
If none of the LEDs light, then check that the correct line voltages are applied to the meter. If the
voltages are correct, call customer service for assistance.
A
B
C
Off
Off
Off
4.2.8 WattNode Error
If the meter experiences an internal error, it will light all LEDs red for three or more seconds. If you
see this happen repeatedly, call customer service.
A
B
C
Red
Red
Red
3.0sec
For other LED patterns, see the Operating and Reference Guide or contact support for assistance.
4.3 Monitoring
The WattNode Pulse models uses opto-isolator outputs that simulate contact closures. These
are generally connected to a data logger or similar monitoring device which can count pulses to
measure energy.
4.4 Pulse Scale Factors
See the Operating and Reference Guide for full details with equations to scale pulse counts and
frequencies to energy and power. The following describes simple scaling that works for common
situations using the variable WHpPpA (watt-hours per pulse per CT rated amp). If you multiply the
WHpPpA by the amp rating of your CTs, the result will be the watt-hours measured each time the
meter generates a pulse.
EnergyPerPulse (WH) = WHpPpA • CtAmps
The standard WHpPpA values are listed in the following table. These only apply for models with
the standard 4.00 Hz full-scale pulse frequency. For other full-scale output frequencies (specified
with Option Hz or Option Kh), see the Operating and Reference Guide or contact support.
11
Watt-Hours per Pulse per CT Rated Amp (FSHz = 4.00)
WattNode Models (1)
Standard and
Option DPO Outputs
Option P3:
Per-Phase Outputs
0.008333
WNB-3Y-208-P
0.02500
WNB-3Y-400-P
0.04792
0.01597
WNB-3Y-480-P
0.05771
0.01924
WNB-3Y-600-P
0.07229
0.02410
0.008333
WNB-3D-240-P
0.02500
WNB-3D-400-P
0.04792
0.01597
WNB-3D-480-P
0.05771
0.01924
Table 3: Watt-Hours per Pulse per CT Rated Amp (WHpPpA)
(1)
Note: the same scale factors also apply for revenue models starting with “RWNB”.
For example: a WNB-3Y-208-P with a full-scale pulse frequency of 4.00 Hz has a WHpPpA value
of 0.0250. With 15 amp CTs, it will output one pulse for every 0.375 watt-hours.
(0.025) • (15.0 amps) = 0.375 watt-hours
It is easy to use the WHpPpA value to compute energy over a time interval, where PulseCount is
the total count of pulses during the time interval (could be an hour, day, month, etc.):
Energy (Wh) = WHpPpA • CtAmps • PulseCount
4.5 Maintenance and Repair
The WattNode meter requires no maintenance. It is not user serviceable and there are no replaceable parts except the pluggable screw terminals. There are no diagnostic tests that can be
performed by the user, other than checking for errors via the status LEDs.
In the event of any failure, the meter must be returned for service (contact CCS for an RMA). For
a new installation, follow the troubleshooting instructions in the Operating and Reference Guide
before returning the meter for service, to ensure that the problem is not connection related.
The WattNode meter should not normally need to be cleaned, but if cleaning is desired, power
must be disconnected first and a dry or damp cloth or brush should be used.
5 Specifications
The following is a list of basic specifications. For extended specifications, see the Operating and
Reference Guide.
5.1 Accuracy
The following accuracy specifications do not include errors caused by the current transformer accuracy or phase angle errors. “Rated current” is the current that generates a CT output voltage of
0.33333 Vac.
Normal Operation:
●● Line voltage: -20% to +15% of nominal
●● Power factor: 1.0
●● Frequency: 48 - 62 Hz
●● Ambient Temperature: 23°C ± 5°C
●● CT Current: 5% - 100% of rated current
Accuracy: ±0.5% of reading
For accuracy at other conditions, see the reference guide.
WattNode Revenue Models:
●● Meets the ANSI C12.1-2008 standard for revenue metering when used with IEEE C57.13
class 0.6 current transformers.
12
5.2 Measurement
Update Rate: ~200 milliseconds. Internally, all measurements are performed at this rate.
Start-Up Time: ~500 milliseconds. The meter starts measuring energy and generating pulses
this long after AC voltage is applied.
Default CT Phase Angle Correction: 0.0 degrees.
5.3 Models and Electrical
Meter Service
Type
Nominal Vac
Line-to-Neutral
Nominal Vac
Line-to-Line
Phases
Wires
3Y-208
120
208–240
1 or 3
2-4
3Y-400
230
400
1 or 3
2-4
3Y-480
277
480
1 or 3
2-4
3Y-600
347
600
1 or 3
2-4
3D-240
120*
208–240
1 or 3
2-4
3D-400
230*
400
3
2-4
3D-480
277*
480
3
2-4
Table 4: WattNode Model Service Types
* Note: the delta models have an optional neutral connection that may be used for measuring
wye circuits. In the absence of neutral, voltages are measured with respect to ground. Delta
WattNode models use the phase A and phase B connections for power.
Over-Voltage Limit: 125% of nominal Vac. Extended over-voltage operation can damage the
WattNode and void the warranty.
Over-Current Limit: 120% of rated current. Exceeding 120% of rated current will not harm the
WattNode meter but the current and power will not be measured accurately.
Maximum Surge: 4kV according to EN 61000-4-5, 6kV for WattNode Revenue models.
Power Consumption: The following table shows maximum volt-amperes, the power supply
ranges, typical power consumption, and typical power factors with all three phases powered at
nominal line voltages. The power supply consumes most of the total power, while the measurement circuitry draws 1-10% of the total (6-96 milliwatts per phase, depending on the model). Due
to the design of the power supply, WattNode meters draw slightly more power at 50 Hz.
Meter
Service
Type
Real
Power
(60 Hz)
Real
Power
(50 Hz)
Power
Factor
Rated
VA (1)
Power Supply
Range (Vac)
Power Supply
Terminals
3Y-208
1.6 W
1.8 W
0.75
4 VA
96 – 138
N and ØA
3Y-400
1.6 W
1.8 W
0.64
4 VA
184 – 264
N and ØA
3Y-480
2.1 W
2.4 W
0.63
4 VA
222 – 318
N and ØA
3Y-600
1.2 W
1.2 W
0.47
4 VA
278 – 399
N and ØA
3D-240
1.7 W
1.9 W
0.63
4 VA
166 – 276
ØA and ØB
3D-400
1.4 W
1.5 W
0.47
3 VA
320 – 460
ØA and ØB
3D-480
1.8 W
2.2 W
0.53
3 VA
384 – 552
ØA and ØB
Table 5: Power Consumption and Supply Voltage
(1)
Note: The Rated VA is the maximum at 115% of nominal Vac at 50 Hz. This is the same as the
value that appears on the front label of the meter.
Maximum Power Supply Voltage Range: -20% to +15% of nominal (see table above). For the
3D-240 service, this is -20% of 208 Vac (166 Vac) to +15% of 240 Vac (276 Vac).
Operating Frequencies: 50/60 Hz
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Measurement Category: CAT III
Measurement category III is for measurements performed in the building installation or on the
load side of the main service breaker. Examples are measurements on distribution boards,
circuit-breakers, wiring, including cables, bus-bars, junction boxes, switches, socket-outlets in
the fixed installation, and equipment for industrial use and some other equipment, for example,
stationary motors with permanent connection to the fixed installation.
The line voltage measurement terminals on the meter are rated for the following CAT III voltages
(these ratings appear on the front label):
Meter Service Type
CAT III Voltage Rating
3Y-208
3D-240
240 Vac
3Y-400
3D-400
400 Vac
3Y-480
3D-480
480 Vac
3Y-600
600 Vac
Table 6: WattNode CAT III Ratings
Current Transformer Inputs:
Nominal Input Voltage (At CT Rated Current): 0.33333 Vac RMS
Absolute Maximum Input Voltage: 5.0 Vac RMS
Input Impedance at 50/60 Hz: 23 kΩ
5.4 Pulse Outputs
Full-Scale Pulse Frequencies:
Standard (All Models): 4.00 Hz
Custom (Bidirectional): 0.01 Hz to 600 Hz
Custom (Option P3, Option PV, Option DPO): 0.01 Hz to 150 Hz
Absolute Maximum Pulse Output Frequencies:
Standard Models (Bidirectional): 900 Hz
Option P3, Option PV, Option DPO: 200 Hz
Output Waveform: square-wave, ~50% duty cycle
Option PW: programmable pulse ON (closed or conducting period, 1 to 65535 milliseconds
Opto-isolator Outputs:
Isolation: 5000 Vac RMS
Breakdown Voltage (collector–emitter): 60 V (exceeding this may destroy the outputs)
Maximum Reverse Voltage (emitter-collector): 5 Vdc (exceeding may destroy the outputs)
Maximum Leakage (OFF) Current (collector–emitter): 100 nA
Recommended Load Current (collector–emitter): 1 μA (microamp) to 5 mA (milliamp)
Maximum Load Current: ~8 mA
5.5 Certifications
Safety:
●● UL 61010-1 (3rd Edition)
●● CAN/CSA-C22.2 No. 61010-1-04
●● IEC 61010-1:2010 (3rd Edition)
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Immunity: EN 61326-1: 2013 (Industrial Locations)
Electrostatic Discharge: EN 61000-4-2
Radiated RF Immunity: EN 61000-4-3
Electrical Fast Transient / Burst: EN 61000-4-4
Surge Immunity: EN 61000-4-5
Conducted RF Immunity: EN 61000-4-6
Voltage Dips, Interrupts: EN 61000-4-11
Emissions:
●● FCC Part 15, Class B
●● EN 55022: 1994, Class B
5.6 Environmental
Operating Temperature: -40°C to +75°C (-40°F to 167°F)
Altitude: Up to 2000 m (6560 ft)
Operating Humidity: non-condensing, 5 to 90% relative humidity (RH) up to 40°C, decreasing
linearly to 50% RH at 55°C.
Pollution: POLLUTION DEGREE 2 - Normally only non-conductive pollution; occasionally, a
temporary conductivity caused by condensation must be expected.
Indoor Use: Suitable for indoor use.
Outdoor Use: Suitable for outdoor use if mounted inside an electrical enclosure (Hammond Mfg.,
Type EJ Series) rated NEMA 3R or 4 (IP 66).
5.7 Mechanical
Enclosure: High impact, ABS/PC plastic
Flame Resistance Rating: UL 94V-0, IEC FV-0
Size: 6.02 in. × 3.35 in. × 1.50 in. (153 mm × 85 mm × 38 mm)
Connectors: Euroblock pluggable terminal blocks
Green: up to 12 AWG (2.5 mm2), 600 V
Black: up to 12 AWG (2.5 mm2), 300 V
5.8 FCC Information
This equipment has been tested and complies with the limits for a Class B digital device, pursuant
to part 15 of the FCC Rules. Operation is subject to the following two conditions: (1) This device
may not cause harmful interference, and (2) this device must accept any interference received,
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 generates, uses and can radiate radio frequency energy
and, if not installed and used in accordance with the instructions, may cause harmful interference to radio communications. However, there is no guarantee that interference will not occur in
a particular installation. If this equipment does cause harmful interference to radio or television
reception, which can be determined by turning the equipment off and on, the user is encouraged to
try to correct the interference by one or more of the following measures:
●●
●●
●●
●●
Reorient or relocate the receiving antenna.
Increase the separation between the equipment and receiver.
Connect the equipment to a circuit different from that to which the receiver is connected.
Consult the dealer or an experienced radio/TV technician for help.
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5.9 Warranty
All products sold by Continental Control Systems, LLC (CCS) are guaranteed against defects in
material and workmanship for a period of five 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.
5.10 Limitation of Liability
In no event shall CCS be liable for any indirect, special, incidental, punitive or consequential 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.
©2009-2017 Continental Control Systems, LLC.
Document Number: WN-Inst-P-2.20
Revision Date: May 11, 2017
Continental Control Systems, LLC
1(303) 444-7422, https://www.ctlsys.com
(M5)
Rev 2.20
• WattNode is a registered trademark of Continental Control Systems, LLC.
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