frako RM 2106/12, Руководство по эксплуатации

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Figure 4: Extended connection
2.8 Extended connection
This type of connection offers a more
precise measuring procedure for the
overcurrent in the capacitor.
In this case, the terminal ”Meas” is at-
tached to another phase conductor of the
AC mains network. The voltage signal for
the internal measurements is tapped be-
tween terminal ”L” and terminal ”Meas”.
Because the voltage signal is recorded
between two phase conductors to which
the capacitors are also connected, the
dU/dt measuring procedure can be used
for calculating the overcurrent.
This means that all frequencies up to the
31st harmonic are taken into account
calculating harmonic overcurrent in the
capacitor(see also section 4.2).
The total harmonic distortion factor of the
voltage (thd) is also measured between
the phase conductors in this type of con-
nection.
RM2112 / 06