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L
L
Control Cable
Figure 2-2. Product Connections to a Watthour Meter
The capacitance between the measurement circuits and the grounded meter case is too
small to pass a common-mode signal of sufficient amplitude to change the measurement.
Devices with their own power supplies which have an isolation input transducer (such as
current transformers) are relatively immune to common mode current errors. The path to
ground is interrupted by the transducer.
Line Side
N
Vin
Shunt
Resistor
N
Load Side
Front-Panel Operation
Notes on Product Use
Fluke 6105A
VOLTAGE OUTPUT ON
CURRENT OUTPUT ON
VOLTAGE
OUTPUT
SENSE
1V Pk
MAX
HI
HI
1430V
Pk
MAX
LO
LO
1V Pk
MAX
46V Pk
MAX
CURRENT
OUTPUT
HI
30A Pk
15V Pk
MAX
LO
46V Pk
MAX
ENERGY COUNTER
1
2
3
INPUTS
0 - 28 V MAX
Fluke 52120A
HIGH CURRENT
OUTPUT
HI
LOW CURRENT
OUTPUT
180A PK
OPTION
7V PK
HI
POWER
MAX
OUTPUT
30A PK
(12V DC)
7V PK
MAX
LO
LO
850V PK
850V PK
MAX
MAX
gpp012.eps
2
4
2-7
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