Technical Bulletin

VeriSafe
™
Absence of Voltage Tester
3
Voltage indicators warn of hazardous voltage, but cannot be used to confirm if equipment is de-energized. Absence
of Voltage Testers are permanently-mounted test devices designed to verify that a circuit is de-energized prior to
opening an electrical enclosure containing electrical conductors and circuit parts.
More than a Voltage Indicator
Absence of Voltage Testers are Fail-Safe and Reliable
• Active indicators for voltage presence and absence
•
• Safety functions meet SIL3 (IEC 61508)
• Comprehensive diagnostics performed as part of each absence of voltage test
Confirmation that adequate battery voltage is present
Health check of key circuit elements including the microcontroller, firmware, and processing components
Verification of connectivity between the tester and power and grounding conductors
Verification that the tester is detecting voltage in the desired range
Calibration test to verify that the test circuits are within tolerance limits
RED indicators illuminate
when hazardous voltage
is present.
Upstream Power: ON
When AC voltage is not detected,
indicators are not illuminated.
This does not guarantee the
absence of voltage.
Upstream Power: OFF
Pressing the "TEST" button initiates
the voltage test, indicated by the
flashing YELLOW caution indicator.
Upstream Power: OFF
GREEN indicator illuminates
only when the absence of
voltage has been verified.
Upstream Power: OFF
Representative image only. VS-AVT used for illustration purposes.