Waveform Examples for Power Loss Events

Power Loss Event

A Power Loss Event will be triggered (and a waveform consequently captured) when the voltages drop to or below about 50% of the nominal, indicating that power is being removed.

The Power Loss event also triggers a controlled shut-down of the TEALwatch® Power Monitor, as the TEALwatch® is powered from the same voltage source that it is monitoring. When the TEALwatch® senses that it is losing power, it begins an orderly shut-down of the software modules and saves the data files to NV-RAM, awaiting power to be re-applied.

NOTE: In some cases, the voltages may begin to collapse, appearing to the TEALwatch® as a Power Loss Event, triggering the TEALwatch® to shutdown. If the voltage does not actually go away completely, the TEALwatch® may still be "ON" but will go into an OFFLINE state (visible at the top of the STATUS tab on the TEALwatch® web page), no longer monitoring. You will need to RESET ALL EVENT BUFFERS for the TEALwatch® via the software RESET button in password protected ADVANCED tab section (see the manual for more information).

Some examples of Power Loss waveforms are shown below.

Example of a Power Loss event, common if power is removed in a standard way,
showing a fairly slow decaying of the voltage amplitude

Example of a Power Loss event, common if power is removed quickly and clamped,
showing a fast decaying of the voltage amplitude

How Do I Adjust The Trigger Thresholds?

To adjust the set-points of the event triggers, please refer to the Users Manual, section 3.6.

How Do I Eliminate These Kinds of Events?

To reduce or eliminate these kinds of power events, you may need to increase the level of your power conditioning to a Voltage Regulator or a UPS. For more information, visit our Additional Power Conditioning web-pages.

For a sampling of various Case Studies that describe various power quality issues and their causes, please visit our Case Studies webpage.

For more information, please contact the TEAL Marketing Department.