Isolation Verification proves that all sources of energy are removed from equipment prior to conducting maintenance works.  Done correctly it eliminates the risk of the equipment starting while being maintained and therefore injuring people or damaging plant.

Redbusbar Electrical Isolation Verification – Selection Guide

Use the following guide to determine the verification solution for your plant.

* Isolator Line Side Voltage – If the line side of the switch / isolator / circuit breaker is typically energised when verifying the isolation eg MCC Drive Cells / Buckets, this mains voltage can be utilised to verify the isolation.  Alternatively, where the line side is de-energised when verifying the isolation eg Field isolators de-energised by an upstream contactor, the verifying device needs to supply its own voltage to verify the isolation.

Electrical Isolation Verification Background

Care is needed when selecting an Electrical Isolation Verification / Proof of isolation / LOTO verification method.  The integrity, location, complexity and cost vary greatly.

Learn more at Electrical Isolation Verification or in the Technical Paper Confirming Electrical Isolations