Installation guide

Chapter 4: Connecting System Components 27
Chapter 4: Connecting System Components
This chapter discusses facility power quality issues, shows how to make sync, MADI, and control connections, and lists console
and module specifications.
Facility Power Quality Issues
Although a detailed discussion of power quality issues is beyond the scope of this manual, we recommend following the stan-
dards and specifications below for reliable performance of your Avid 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 related equipment. AC power sources shall have no more than 5% harmonic voltage dis-
tortion, with the largest single harmonic being no more than 3% of the fundamental voltage. Higher levels of harmonics can re-
sult in erratic behavior and unpredictable performance.
Voltage Transient
A transient impulse is a sharp, sudden rise in voltage. The power can jump up to several thousand volts, with spikes large enough
to damage sensitive electronic equipment. Transient disturbances may also cause computers to reset and/or breakers to trip. Spike
durations usually last between 4 ms and 1 cycle (17 ms at 60 Hz) and exceed 50% or greater than the nominal voltage level. Sys-
tem 5’s products have been tested and found to comply with the performance limits of EN55103:2, E-4 Environment.
Voltage Fluctuation
Voltage fluctuation is a sudden and noticeable change in RMS voltage level, usually caused by variable system loads. Certain types
of electronic equipment are more susceptible to voltage fluctuations than others. Flicker, or light flicker, is voltage fluctuation with
a typical duration of 3–10 cycles (50–167 ms at 60 Hz). System 5’s products have been tested and found to comply with the per-
formance limits of EN55103:2, E-4 Environment.
Voltage Sag
A voltage sag is a brief dip in voltage below 90% of the equipment rating. System 5’s products have been tested and found to com-
ply with the performance limits of EN55103:2, E-4 Environment.
See “Typical Room and Equipment Layout for System 5” on page 28 before planning an installation to learn
about suggested equipment locations.
If a product must be operated in a degraded power environment, be careful not to exceed the EN55102 electronic limits.
A two-year study by the IEEE of 200 locations found that over 80% of the equipment interruptions were due to power
lines transients.