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INSTALLATION - WIRING DIAGRAM
TYPICAL 208/480 VAC 3Ø, 3,4 WIRE INSTALLATION
TYPICAL 240/120 VAC 1Ø, 3-WIRE INSTALLATION
120
Neutral
120
(Cap yellow voltage lead)
Choose an address number which is not in use and set the switches
1
for that address as shown in Figure 4. Only addresses 1 to 63 may be
used. This address will be required when adding the hardware object
at Metasys.
Disconnect power and lock-out all power sources during installation.
2
DO NOT CONNECT VOLTAGE INPUTS LIVE!
3
Connect the voltage leads to the phase conductors, as shown in Figure
2. Since the meter requires voltage to communicate, connect the leads
to a location which is not normally switched off. Connect the red lead
to the conductor most convieniently located to physically mount the CT
with the N2 BUS connector. After selecting the conductor for the red
lead, the black and yellow leads may be attached to either of the other
two conductors.
Attach CTs to conductors. Each CT must be attached to the same
4
conductor as the correspondingly colored voltage lead. (See wiring
diagram above) The unit will automatically detect phase reversal, so it
is not important to orient a particular side of each CT towards the load.
N2 BUS
To additional N2 Devices
N2 bus
Black CT
Red CT
FIGURE 2
When monitoring devices controlled by variable frequency drives,
always connect the meter(s) to the line side (NEVER the load side).
CONNECTING H8000 SERIES METERS TO THE LOAD SIDE OF A
VARIABLE FREQUENCY DRIVE WILL PERMANENTLY DAMAGE THE
ELECTRONICS!
Note: The meter cannot communicate on the N2 bus without power.
Therefore, it is best to connect the voltage leads ahead of switching devices.
TYPICAL 277 VAC 1Ø, 2-WIRE INSTALLATION
Neutral
277
(Cap yellow voltage lead)
5
Remove the terminal block and attach the N2 BUS. Positive (N2+),
negative (N2-) and REF wires must be connected as shown in
Figure 3.
If necessary, insulate any exposed N2 wiring. Ensure that the
insulation complies with local and national electrical codes. When
installing multiple meters, attach all N2 BUS connectors to the net-
work trunk cable as shown in Figure 3, then connect the individual
meters to the trunk.
6
Set up Metasys (see page 6).
Approximate Check of Power Reading:
7
1. Check actual current with Amp clamp.
Expected power is:
kW = Volts x Amps x 1.732 x PF ÷ 1000
kW = Horsepower x .746
This should be compared with value read by AI-2.
- 3 -
N2 bus
Black CT
Red CT
Yellow C T
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