PC5 SERIES WATT TRANSDUCER CALIBRATION MANUAL
Page 3
OUTPUT OPTION
Suffix Letter
OUTPUT
A
0 to ±1 mADC
Self powered.
B
0 to ± 1 mADC
Requires 120 volts AC instrument
power.
C
0 to ± 10 Volts DC
Self powered.
D
0 to ±10 Volts DC
Requires 120 volts AC instrument
power.
E
4 to 20 mADC
Requires 120 volts AC instrument
power.
E2
4 to 20 mADC
Requires 24 volts DC in the
external loop.
X5
0 to ±5 volts DC
Requires 120 volts AC instrument
power.
CX5
0 to ±5 volts DC
Self powered.
Options A , C, & CX5 the self powered models
should maintain the voltage within:
120 volt models: 85 to 135 volts AC
240 volt models: 200 to 280 volts AC
480 volt models: 380 to 550 volts AC
The standard specification sheets show the
Effective Range of the voltage and current.
These inputs indicate the ranges over which
the transducer will be within its specified
accuracy. The rated output "RO" is the
calibration point at which the 1mA, 5V, 10V or
20mA is obtained. All transducer outputs will
over range by 20% as long as the voltage and
current are in their effective range.
3.2
VOLTAGE INPUTS
PC5 Watt Transducers are designed for
nominal inputs of 120, 240/277 or 480 VAC.
The effective range at the specified accuracy
is 0 to 150, 0 to 300, or 0 to 600 VAC. These
wide ranges do not apply to Options A or C,
which are limited as follows: 85 to 135 V for 0
to 150 V models, 200 to 280 V for 0 to 300 V
models, and 380 to 550 V for 0 to 600
models.
3.3
CURRENT INPUTS
Standard models are rated from 1 through
1000 amperes. Models with input current up
to 20 amperes connect direct to the terminal
strips. Models above 20 amperes use a
current transformer. Current connections are
made through the window of the current
transformer.
(A)
Current Transformers
Current transformers step the current
down to 5 amperes. When specified
by model number these current
transformers are calibrated as part of
the watt transducer and should not be
interchanged among different watt
transducers. Extending the leads of
the current transformers is permissible
as long as 12-gauge wire is used and
the VA rating of the transformer is not
exceeded. See Page 18 Technical
Bulletin 101 for wire sizes.
