CCS WattNode Pulse WNB-3Y-208-P User manual

Continental Control Systems LLC
Rev V17b
(M5)
WattNode®Pulse
Installation and Operation Manual
●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
99 Washington Street
Melrose, MA 02176
Phone [phone]
Toll Free 1-800-517-8431
Visit us at www.TestEquipmentDepot.com

2
Information in this document is subject to change without notice.
©2007-2011 Continental Control Systems, LLC. All rights reserved.
Printed in the United States of America.
Document Number: WNB-P-V17b
Revision Date: November 30, 2011
WattNode is a registered trademark of Continental Control Systems, LLC.
FCC Information
This equipment has been tested and complies with the limits for a Class B digital device, pursu-
ant 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 interfer-
ence 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 into an outlet on a circuit different from that to which the receiver is
connected.
●Consult the dealer or an experienced radio/TV technician to help.

Contents 3
Contents
Overview ................................................................................................................................4
Pulse Outputs.................................................................................................................................. 4
Diagnostic LEDs .............................................................................................................................. 4
Current Transformers....................................................................................................................... 4
Additional Literature......................................................................................................................... 4
Front Label ...................................................................................................................................... 5
Installation .............................................................................................................................7
Precautions ..................................................................................................................................... 7
Electrical Service Types ................................................................................................................... 8
Single-Phase Two-Wire with Neutral .......................................................................................... 8
Single-Phase Three-Wire (Mid-Point Neutral) ............................................................................. 9
Single-Phase Two-Wire without Neutral ....................................................................................10
Three-Phase Four-Wire Wye.....................................................................................................11
Three-Phase Three-Wire Delta Without Neutral.........................................................................12
Three-Phase Four-Wire Delta (Wild Leg) ...................................................................................12
Grounded Leg Service .............................................................................................................12
Mounting........................................................................................................................................13
Selecting Current Transformers ......................................................................................................14
Connecting Current Transformers...................................................................................................15
Circuit Protection............................................................................................................................16
Connecting Voltage Terminals.........................................................................................................17
Connecting Pulse Outputs..............................................................................................................17
Output Assignments.................................................................................................................18
Pull-Up Resistor Selection ........................................................................................................19
Installation Summary ......................................................................................................................19
Installation LED Diagnostics........................................................................................................... 20
Measurement Troubleshooting....................................................................................................... 22
Operating Instructions.........................................................................................................24
Pulse Outputs.................................................................................................................................24
Power and Energy Computation .................................................................................................... 25
Power and Energy Equations..........................................................................................................27
Maintenance and Repair................................................................................................................ 29
Specifications ......................................................................................................................30
Models .......................................................................................................................................... 30
Model Options ........................................................................................................................ 30
Accuracy..................................................................................................................................31
Measurement ................................................................................................................................ 32
Pulse Outputs................................................................................................................................ 32
Electrical ....................................................................................................................................... 33
Certifications ................................................................................................................................. 35
Environmental................................................................................................................................ 35
Mechanical.................................................................................................................................... 35
Current Transformers..................................................................................................................... 35
Warranty...............................................................................................................................37
Limitation of Liability .......................................................................................................................37

4 Overview
Overview
Congratulations on your purchase of the WattNode®Pulse watt/watt-hour transducer/meter.
It accurately measures energy and power in a compact package. The WattNode meter can fit
in existing electric service panels avoiding the costly installation of sub-panels and associated
wiring. It is designed for use in demand side management (DSM), sub-metering, and energy
monitoring applications. The WattNode meter generates pulses proportional to total watt-hours.
The pulse rate or frequency is proportional to the instantaneous power. Models are available for
single-phase and three-phase, wye and delta configurations for voltages from 120Vac to 600Vac
at 50 and 60Hz.
Pulse Outputs
The WattNode meter generates pulse outputs using one or more optoisolators (also called
photocouplers). These provide 5000 Vac of electrical isolation. The pulse outputs can interface to
monitoring or data logging hardware without concerns about interference, ground loops, shock
hazard, etc.
The standard Pulse WattNode meter makes bidirectional power measurements (energy consump-
tion and energy production). It can be used for conventional power and energy measurement as
well as for net metering and photovoltaic (PV) applications.
●Option P3 - The per-phase measurement option measures one, two, or three separate
branch circuits with a single meter, saving money and space.
●Option PV - The photovoltaic option measures residential PV systems. One WattNode meter
measures the bidirectional total house energy, and the PV (or wind) generated energy. See
Manual Supplement MS-10: Option PV (Photovoltaic) for details.
●Options DPO - The dual positive outputs option behaves exactly like the standard bidirec-
tional model, but with the addition of a second positive pulse output channel (on the P3
output terminal). This allows you to connect to two devices, such as a display and a data
logger. See Manual Supplement MS-11: Option DPO (Dual Positive Outputs) for details.
See Model Options (p. 30)in the Specifications section below for details and more options.
Diagnostic LEDs
The Pulse WattNode meter includes three diagnostic LEDs—one per phase. During normal
operation, these LEDs flash on and off, with the speed of flashing roughly proportional to the
power on each phase. The LEDs flash green for positive power and red for negative power. Other
conditions are signaled with different LED patterns. See the Installation LED Diagnostics (p.
20)section for full details.
Current Transformers
The WattNode meter uses solid-core (toroidal), split-core (opening), and bus-bar style current
transformers (CTs) with a full-scale voltage output of 0.33333 Vac. Split-core and bus-bar CTs
are easier to install without disconnecting the circuit being measured. Solid-core CTs are more
compact, generally more accurate, and less expensive, but installation requires that you discon-
nect the circuit to install the CTs.
Additional Literature
●WattNode Advanced Pulse - Quick Install Guide
●Manual Supplement MS-10: Option PV (Photovoltaic)
●Manual Supplement MS-11: Option DPO (Dual Positive Outputs)
●Manual Supplement MS-17: Option PW (Pulse Width)
●Manual Supplement MS-19: Option SSR (Solid-State Relay)

Overview 5
Front Label
This section describes all the connections, information, and symbols that appear on the front
label.
Continental Control Systems LLC
WATTNODE
®
PULSE
Watthour Meter
3KNN
Boulder, CO USA
Ø
B CT
0.333V~
Ø
C CT
0.333V~
Ø
A CT
0.333V~Status
Status
Status
P1
P2
P3
COM
Output
ØB
ØC
N
ØA
Ø-Ø 240V~Ø-Ø 240V~
240V CAT III240V CAT III
Ø-N 140V~Ø-N 140V~
120V~ 50-60Hz 3W
2010-09-26SN 59063
WNB-3Y-208-P
Q
N
O
P
M
K
UW
HIJ
A
C
B
E
F
G
D
YZ
R
VT X
S
Figure 1: Front Label Diagram
A: WattNode model number. The “WNB” indicates a second generation WattNode meter with
diagnostic LEDs and up to three pulse output channels. The “3” indicates a three-phase model.
The “Y” or “D” indicates wye or delta models, although delta models can measure wye circuits
(the difference is in the power supply). The “208” (or other value) indicates the nominal line-to-
line voltage. Finally, the “P” indicates pulse output.
B: Functional ground. This terminal should be connected to earth ground if possible. It is not
required for safety grounding, but ensures maximum 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 ØA(phase A), ØB(phase B), and
ØC(phase C) electric mains. On wye models the meter is powered from ØAand Nterminals.
On delta models, the meter is powered from the ØAand ØBterminals.
G: Line voltage measurement ratings. This block lists the nominal line-to-neutral “Ø-N 120V~”
voltage, line-to-line “Ø-Ø 240V~” voltage, and the rated measurement voltage and category
“240V CAT III” for this WattNode model. See the Specifications (p. 30)for more informa-
tion about the measurement voltage and category.
H: UL Listing mark. This shows the UL and cUL (Canadian) listing mark and number “3KNN”.
I: FCC Mark. This logo indicates that the meter complied with part 15 of the FCC rules.
J: Status LEDs. These are status LEDs used to verify and diagnose meter operation. See
Installation LED Diagnostics (p. 20)for details.
K: Current transformer (CT) voltage rating. These markings “0.333V~” indicate that the meter
must be used with CTs that generate a full-scale output of 0.333 Vac (333 millivolts).

6 Overview
M, N, O: Current transformer (CT) inputs. These indicate CT screw terminals. Note the white
and black circles at the left edge of the label: these indicate the color of the CT wire that should
be inserted into the corresponding screw terminal. The terminals marked with black circles are
connected together internally.
P: Pulse output common (COM). This is the common terminal for all three pulse output chan-
nels. This terminal should be more negative than the P1, P2, and P3 terminals (unless the
meter was ordered with Option SSR).
Q, R, S: Pulse outputs (P1, P2, P3). These are the pulse output channels. Different models use
one, two, or three channels. They should always be positive relative to the common terminal.
T: Serial number. This shows the meter serial number and options if any are selected. The
barcode contains the serial number in Code 128C format.
U: Mains supply rated voltage. This is the rated supply voltage for this model. The V~indicates
AC voltage. For wye models, this voltage should appear between the Nand ØAterminals. For
delta models, this voltage should appear between the ØAand ØBterminals.
V: Mains frequencies. This indicates the rated mains frequencies for the meter.
W: Maximum rated power. This is the maximum power consumption (watts) for this model.
X: Manufacture date. This is the date of manufacture for the WattNode meter.
Y: Caution, risk of electrical shock. This symbol indicates that there is a risk of electric shock
when installing and operating the meter if the installation instructions are not followed correctly.
Z: Attention - consult Manual. This symbol indicates that there can be danger when installing
and operating the meter if the installation instructions are not followed correctly.
Symbols
Attention -
Consult Installation
and Operation Manual
Read, understand, and follow all instructions in this Installa-
tion and Operation Manual including all warnings, cautions,
and precautions before installing and using the product.
Caution –
Risk of Electrical
Shock
Potential Shock Hazard from Dangerous High Voltage.
CE Marking
Complies with the regulations of the European Union for
Product Safety and Electro-Magnetic Compatibility.
●Low Voltage Directive – EN 61010-1: 2001
●EMC Directive – EN 61327: 1997 + A1/1998 + A2/2001

Installation 7
Installation
Precautions
DANGER — HAZARDOUS VOLTAGES
WARNING - These installation/servicing instructions are for use by qualified personnel
only. To avoid electrical shock, do not perform any servicing other than that contained in
the operating instructions unless you are qualified to do so.
Always adhere to the following checklist:
1) Only qualified personnel or licensed electricians should install the WattNode meter. The
mains voltages of 120Vac to 600Vac can be lethal!
2) Follow all applicable local and national electrical and safety codes.
3) Install the meter in an electrical enclosure (panel or junction box) or in a limited access
electrical room.
4) Verify that circuit voltages and currents are within the proper range for the meter model.
5) Use only UL recognized current transformers (CTs) with built-in burden resistors, that gener-
ate 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. See Current Transformers (p. 35)for CT maximum input current ratings.
6) Ensure that the line voltage inputs to the meter are protected by fuses or circuit breakers (not
needed for the neutral wire). See Circuit Protection (p. 16)for details.
7) Equipment must be disconnected from the HAZARDOUS LIVE voltages before access.
8) The terminal block screws are not insulated. Do not contact metal tools to the screw termi-
nals if the circuit is live!
9) Do not place more than one line voltage wire in a screw terminal; use wire nuts instead. You
may use more than one CT wire per screw terminal.
10) Before applying power, check that all the wires are securely installed by tugging on each wire.
11) Do not install the meter where it may be exposed to temperatures below –30°C or above
55°C, excessive moisture, dust, salt spray, or other contamination. The meter requires an
environment no worse than pollution degree 2 (normally only non-conductive pollution;
occasionally, a temporary conductivity caused by condensation must be expected).
12) Do not drill mounting holes using the meter as a guide; the drill chuck can damage the screw
terminals and metal shavings can fall into the connectors, causing an arc risk.
13) If the meter is installed incorrectly, the safety protections may be impaired.

8 Installation
Electrical Service Types
Below is a list of service types, with connections and recommended models. Note: the ground
connection improves measurement accuracy, but is not required for safety.
Model Type Line-to-
Neutral
Line-to-
Line
Electrical
Service Types
WNB-3Y-20 8-P Wye 120 Vac 208–240
Vac
1 Phase 2 Wire 120V with neutral
1 Phase 3 Wire 120V/240V with neutral
3 Phase 4 Wire Wye 120V/208V with neutral
WNB-3Y-400-P Wye 230 Vac 400 Vac 1 Phase 2 Wire 230V with neutral
3 Phase 4 Wire Wye 230V/400V with neutral
WNB-3Y-480-P Wye 277 Vac 480 Vac 3 Phase 4 Wire Wye 277V/480V with neutral
1 Phase 2 Wire 277V with neutral
WNB-3Y-60 0 -P Wye 347 Vac 600 Vac 3 Phase 4 Wire Wye 347V/600V with neutral
WNB-3D-240-P Delta
or Wye
120 –140
Vac
208–240
Vac
1 Phase 2 Wire 208V (no neutral)
1 Phase 2 Wire 240V (no neutral)
1 Phase 3 Wire 120V/240V with neutral
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
WNB-3D-400-P Delta
or Wye 230 Vac 400 Vac 3 Phase 3 Wire Delta 400V (no neutral) 3 Phase 4 Wire Wye 230V/400V with neutral
WNB-3D-480-P Delta
or Wye 277 Vac 480 Vac
3 Phase 3 Wire Delta 480V (no neutral)
3 Phase 4 Wire Wye 277V/480V with neutral
3 Phase 4 Wire Delta 240/415/480V with neutral
*The wire count does NOT include ground. It only includes neutral (if present) and phase wires.
Table 1 : WattNode Models
Single-Phase Two-Wire with Neutral
This configuration is most often seen in homes and offices. The two conductors are neutral and
line. For these models, the meter is powered from the Nand ØAterminals.
Figure 2: Single-Phase Two-Wire Connection
Ground
WHITE
BLACK
ØB CT
ØC CT
ØA CT
ØB
ØC
N
ØA
GND or Common
Input or Positive
Monitoring Equip-
ment or Display
P1
P2
P3
COM
Output
Status
Status
Status
W ATT N ODE
®
P ULSE
WNB-
WNB--P
-P
Line
Neutral
LINE
LOAD
Shorting
Jumpers
Source
Face
Current
Transformer
3Y-xxx

Installation 9
Recommended WattNode Models
The following table shows the WattNode models that should be used, depending on the line to
neutral voltage.
Line to Neutral Voltage WattNode Model
120 Vac WNB-3Y-20 8-P
230 Vac WNB-3Y-400-P
277 Vac WNB-3Y-480-P
Single-Phase Three-Wire (Mid-Point Neutral)
This configuration is seen in North American residential and commercial service with 240 Vac for
large appliances. The three conductors are a mid-point neutral and two line voltage wires with AC
waveforms 180° out of phase; this results in 120Vac between either line conductors (phase) and
neutral, and 240Vac (or sometimes 208Vac) between the two line conductors (phases).
Figure 3: 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 WNB-3D-240-P (see Single-Phase Two-Wire without Neutral
below). If neutral is present, it must be connected for accurate measurements. If phase B may
not be present, you should use the WNB-3Y-208-P (see Single-Phase Two-Wire with Neutral
above).
Meter Power Source WattNode Model
Nand ØA(Neutral and Phase A) WNB-3Y-20 8-P
ØAand ØB(Phase A and Phase B) WNB-3D-240-P
Ground
WHITE
BLACK
ØB CT
ØC CT
ØA CT
ØB
ØC
N
ØA
GND or Common
Input or Positive
Monitoring Equip-
ment or Display
P1
P2
P3
COM
Output
Status
Status
Status
W ATT N ODE
®
P ULSE
WNB-
WNB--P
-P
Phase A
Neutral
Phase B
WHITE
BLACK
120 Vac
240 Vac
120 Vac
LINE
LOAD
Shorting
Jumper Source
Faces
Current
Transformers
3Y-208
3D-240

10 Installation
Single-Phase Two-Wire without Neutral
This is seen in residential and commercial service with 208 to 240 Vac for large appliances. The
two conductors have AC waveforms 120° or 180° out of phase. Neutral is not used. For this
configuration, the meter is powered from the ØAand ØB(phase A and phase B) terminals.
For best accuracy, we recommend connecting the N(neutral) terminal to the ground terminal.
This will not cause ground current to flow because the neutral terminal does not power the meter.
Figure 4: Single-Phase Two-Wire without Neutral Connection
Recommended WattNode Model
This configuration is normally measured with the following WattNode model.
Line-to-Line Voltage WattNode Model
208 - 240 Vac WNB-3D-240-P
If neutral is available, you may also use the WNB-3Y-208-P model. If you use the WNB-3Y-208-P,
you will need to hook up the meter as shown in section Single-Phase Three-Wire (Mid-Point
Neutral) and connect neutral. You will need two CTs.
If one of the conductors (phase A or phase B) is grounded, see Grounded Leg Service below for
recommendations.
Ground
WHITE
BLACK
ØB CT
ØC CT
ØA CT
ØB
ØC
N
ØA
GND or Common
Input or Positive
Monitoring Equip-
ment or Display
P1
P2
P3
COM
Output
Status
Status
Status
W ATT N ODE
®
P ULSE
WNB-
WNB--P
-P
Phase A
Phase B
WHITE
BLACK
208-240 Vac
LINE
LOAD
Shorting
Jumper Source
Faces
Current
Transformers
3D-240
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