Westinghouse IQ DATA User Manual page 15

Line metering system
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10 DATA
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The wiring of the IQ Data must follow a suita­
4.2 Wiring
-
ble "wiring plan drawing." T he term wiring plan, as used here,
refers to the drawings made for the specific application. It
describes all electrical connections between the IQ Data and
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the machine or process equipment. T his is made up by the
user or OEM.
A typical wiring plan is shown in Figures 4.4A thru 4.4F.
Observe the Figures and note the following:
1. Phasing and polarity of the AC current inputs and the
AC voltage inputs.
2. The incoming AC line phases A,
to the AC Line Connection Terminals on the chassis,
when line voltage is 600 volts or less.
3. The wires connecting to the IQ Data must not be larger
than AWG No. 14. Larger wires will not connect properly
with the various terminal blocks.
4. Wiring between the current transformers and the IQ Data
should be kept as short as possible (200 feet max.). Also,
whenever possible, route these lines away from other AC
lines and inductive devices. If the lines must cross other
AC lines, plan to cross them at right angles.
5. Terminals ground, 2, 4, and 6 should be maintained at
the same potential to prevent errors in the current meter­
ing. If the IQ Data is to read line-to-neutral voltages, the
Neutral must be connected to the system ground
minals 2, 4, and 6 must be connected to Neutral.
All wiring must conform to applicable federal, state, and local
codes.
Ensure that the incoming AC power and all "foreign" power
sources are turned OFF and locked out before perform­
ing any work on the IQ Data or its associated equipment.
Failure to observe this practice can result in serious or even
fatal injury and/or equipment damage.
Shaded area designates information that
replaces or supplements applications using
the 3-phase Power Module.
14
T D 172838
8
and C wire directly
ter­
or

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