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Trasformatori di corrente

The Power Diagnostix line of coupling devices includes quadrupoles, current transformers, and coupling capacitors to adapt Power Diagnostix PD detectors to different measurement tasks. The coupling device in a PD measuring circuit provides the means of sensing the partial discharge pulse and sending it as a voltage signal to a preamplifier for conditioning.

Trasformatori di corrente

When a current transformer is used instead of a quadrupole, the current transformer can be placed around a coupling capacitor terminal or around a part of the test object itself. A current transformer has the advantage of providing galvanic isolation between the ICMseries PD detector and the high voltage circuit. Power Diagnostix offers current transformers as separate modules or integrated with a coupling capacitor into a single unit.

The CTs are a low-impact PD sensor option since no interruption of the power connection is required. Such installation is even possible under on-line conditions, as the CT100 is a clamp-on current transformer that can be opened and clamped around a connecting cable, a ground lead, or even a feeding medium-voltage cable with a high-voltage motor installation.

Taglie standard

Type Transfer Ratio at 50 Ω Primary Window Bandwidth at -3 db Bandwidth at -6 db
CT1 1:10 15 mm 0.5-80 MHz 0.3-100 MHz
CT100(/R) 1:10 100 mm 2-25 MHz 1.2-40 MHz
CT125R 1:10 125 mm 2-25 MHz 1.2-40 MHz
CT150R 1:10 150 mm 2-25 MHz 1.2-40 MHz