Euphonix System 5 Installation Guide
Interconnecting System Components
21
Facility Power Quality Recommendations
Although a detailed exploration into the types of power quality issues is beyond the scope
of this manual, we'd like to briefly touch on a few of the most important mechanisms that
determine your facility's power quality. The following is a list of facility power
standards/specifications that is recommended for optimal and reliable performance of
your Euphonix console:
Harmonic Distortion
IEEE Standard 519,
Recommended Practices and Requirements for Harmonic Control In
Electrical Power Systems
, establishes harmonic limits on voltages for computers and
computer-based equipment. AC power sources shall have no more than a 5% harmonic
voltage distortion factor, with the largest single harmonic being no more than 3% of the
fundamental voltage. Higher levels of harmonics can result in erratic behavior and
unpredictable performance.
Transients
A two-year study by the IEEE of 200 locations found that over 80% of the equipment
interruptions were due to transients on the power lines. A transient impulse is a sharp,
sudden rise in voltage. The power can jump up to a few thousand volts. The spikes may
contain enough energy to damage sensitive electronic equipment. Transient disturbances
may also cause computers to reset and/or breakers to trip. Spike durations usually last
between 4 microseconds and 1 cycle (17mS at 60Hz) and exceed 50% or greater than the
nominal voltage level.
Euphonix's products have been tested and found to comply with the performance limits of
EN55103:2, E-4 Environment. Should the product be operated in a degraded power
environment, care should be taken to insure that the EN55102 electronic limits are not
exceeded.
Voltage Fluctuation
Voltage fluctuation is a sudden and noticeable change in rms voltage level. It is usually
caused by changing, complex system loads. It is recognized that certain types of electical
and electronic equipment are susceptible to voltage fluctuations. "Flicker", or "light
flicker" is a type of voltage fluctuation. The typical duration is from 3 to 10 cycles, or 50
to 167 milliseconds at 60Hz.
Euphonix's products have been tested and found to comply with the performance limits of
EN55103:2, E-4 Environment. Should the product be operated in a degraded power
environment, care should be taken to insure that the EN55102 EFT limits are not
exceeded.
