Overview 5
Front Label
This section describes all the connections, information, and symbols that appear on the front
label.
Continental Control Systems LLC
W
ATT
N
ODE
®
P
ULSE
Watthour Meter
3KNN
USA
Ø
B CT
0.333V
~
Ø
C CT
0.333V
~
Ø
A CT
0.333V
~
Status
Status
Status
P1
P2
P3
COM
Pulse
Ø
B
Ø
C
N
Ø
A
Ø-Ø
240V
~
Ø-Ø
240V
~
240V CAT III
240V CAT III
Ø-
N 140V
~
Ø-
N 140V
~
120V
~
50
-
60Hz 3W
2010-09-26
SN 59063
WNB
-
3Y
-
208
-
P
Q
N
O
P
M
K
U
W
H
I
J
A
C
B
E
F
G
D
Y Z
R
V
T
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
Ø
A
(phase A),
Ø
B
(phase B), and
Ø
C
(phase C) electric mains. On wye models the meter is powered from
Ø
A
and
N
terminals.
On delta models, the meter is powered from the
Ø
A
and
Ø
B
terminals.
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
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. 21)
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).
