Ht-instruments PQA824 Bedienungsanleitung PDF herunterladen (Seite 132)

PQA400 - PQA823 - PQA824

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10.3. INRUSH CURRENTS (ONLY PQA82X)

The PQA82x meters permits the real time detection of inrush current events, typical of

start-up of electrical machines and also for other industrial applications (e.g.

troubleshooting problem regarding loads switching, correct calculation of protection

devices, oscillating currents, etc…) as shown in the following pictures:

Fig. 208: Parameters of standard inrush current event

Fig. 209: Parameters of oscillating inrush current event

The meter detect and recording as inrush current all the events where the phase currents

TRMS values are over a set limit threshold. The maximum number of recorded events is

fixed to 1000.

During setting operation before recording start the user can be modify the below

parameters:

 Current limit threshold: Current value of detection and recording of the event.

The maximum set value of this parameter is always

equal to the full scale of used transducer clamps.

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Ht-instruments PQA824 Bedienungsanleitung Seite 132