PPA5xx/15xx user manual
7-16
7.7 AUX – Auxiliary Devices
PCIS Inrush Switch – (Phase Controlled Inrush Switch)
Accessory for the PPA range to provide the precise
measurement of Inrush Current on a single phase AC load.
Application: When measuring the maximum inrush current
taken by a load, it is necessary to switch on the supply at
a specific point in the voltage cycle. The point at which
maximum inrush current will be drawn is dependent upon
the type of load being tested, but usually, this is 90° or
270° for capacitive loads and 0° or 180° for an inductive
load. It can also be useful to measure the inrush current at
intermediate points between the maximum and minimum
levels; therefore, an ideal phase switching device allows
the selection of phase angle at increments of 45°
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