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Mark Beeson (Deactivated)

Mark Beeson (Deactivated)

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Overview

The SA380-IT may be used to measure the isolation between two independent circuits by wiring the device as shown below.

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Wiring the Power supply to the unit into input number, one, via the "HI Z" terminals provides the benefit of measureing resistance to earth of this circuit.

Info
  • At present the SA380-IT can not independently measure faults to earth of the two connected DC circuit circuits. A future firmware update will allow this to be achieved
  • At present, the SA380-IT measures the degree of isolation between circuit circuits as a standing voltage between the two circuits being measured.

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Detectable Faults

A standing voltage on the SA380-IT inputs will be observed if any of the four fault conditions shown below are true.

FAULT DIAGRAMSImage Added

Fault 1 and Fault 2 cause a voltage to present across both of the SA380-IT inputs. In this scenario the voltage may be as high as the nominal circuit voltage.

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