Sag A momentary decrease from nominal voltage lasting one or more line cycles. Severe conditions may indicate a need for a UPS or voltage regulator. Sine wave A periodic oscillation. The fundamental waveform from which other waveforms may be generated by combinations of various group of harmonics. Surge A surge is a prolonged over-voltage condition.
Surges can damage electronics and corrupt or destroy data.
Spike A spike involves a sudden marked jump in voltage, which can damage electronics and corrupt or destroy data. These products are inexpensive solutions that provide minimal protection against surges, but no protection against sags and outages. Suppressed voltage ratings Several ranges are assigned by UL for grading transient suppression voltages. For instance, a 400 volt rating indicates a maximum peak voltage between 330 and 400 volts. These ratings appear between 330 volts peak and 6000 volts peak.