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What is an Absence of Voltage Tester?

AVT : Absence-of-voltage Testers

Absence-of-voltage testers (AVTs) are permanently-mounted testers used to determine if a circuit part is de-energized before opening doors or covers to access electrical equipment.

UL 1436

Absence-of-voltage testers are a new product listing category that was recently added to UL 1436, Standard for Outlet Circuit Testers and Similar Indicating Devices. absence-of-voltage testers are designed to run internal diagnostics to perform the live-dead-live type of verification with a secondary test source and actively indicate the absence of voltage for fixed installations.

The benefit of absence-of-voltage testers will be significant to the qualified worker performing these tasks. Today, the sequence of activities includes turning off power, performing Lockout / Tagout procedures, selecting proper PPE for the hazard - assuming the presence of power and testing with a hand-held test device. Now, with the permanently mounted absence-of-voltage tester, the worker will have the ability to (automatically) conduct the steps without being exposed to a hazard and needing PPE. The worker can now verify absence of voltage while eliminating multiple steps in the standard sequence.

Would you like to learn more about absence-of-voltage testers or see a demo? Contact your account manager or fill out our solutions information request form.

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