Preliminary
9 Measurement Modes
1
9.1 Overview
The CAPO has three measurement inputs: A, B and HV-GND.
Over an internal relays-matrix they are automatically combined for the different measurement
modes as follows:
If the measured Input is guarded, it means that the input is internally connected to the so called
“V”-potential which is the low voltage point (reference) of the high voltage supply. All currents that
flow directly to this point will not be measured.
1 According to ANSI/IEEE Standard 62, IEEE Std C57.152-2013
90315-1.2 Instruction Manual CAPO
Page 72 of 117
Measurement Inputs
Mode A B HVGND
UST A measured guarded guarded
UST B guarded measured guarded
UST A+B measured measured guarded
GST A+B measured measured measured
GSTg A guarded measured measured
GSTg B measured guarded measured
GSTg A+B guarded guarded measured
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