1100-Lfc Current Requirements; Powering Up The 1100-Lfc - Meyer Sound 1100-LFC Operating Instructions Manual

1100-LFC CURRENT REQUIREMENTS

The current draw for the 1100-LFC is dynamic and fluctu-
ates as operating levels change. Since different cables and
circuit breakers heat up at varying rates, it is important to
understand the following types of current ratings and how
they affect circuit breaker and cable specifications.
■ Idle Current — The maximum rms current during idle
periods.
■ Maximum Long-Term Continuous Current — The
maximum rms current during a period of at least 10 sec-
onds. The maximum long-term continuous current is
used to calculate temperature increases for cables, to
ensure that cable sizes and gauges conform to electrical
code standards. The current rating is also used as a rat-
ing for slow-reacting thermal breakers, which are recom-
mended for loudspeaker power distribution.
■ Burst Current — The maximum rms current during a
period of around one second. The burst current is used
as a rating for magnetic breakers. It is also used for cal-
culating the peak voltage drop in long AC cable runs
according to the following formula:
V pk (drop) = I pk x R (cable total)
Ultimate Short-Term Peak Current — A rating for fast-
■
reacting magnetic breakers.
■ Inrush Current — The spike of initial current encoun-
tered when powering on.
You can use Table 1 as a guide for selecting cable gauges
and circuit breaker ratings for the system's operating volt-
age.
Table 1: 1100-LFC Current Draw
Current Draw
Idle Current
Maximum Long-Term
Continuous Current
Burst Current
Ultimate Short-Term
Peak Current
Inrush Current
230 V AC
0.6 A rms
10.5 A rms
18 A rms
53 A peak
<30 A peak
The minimum electrical service amperage required by an
1100-LFC loudspeaker system is the sum of the maximum
long-term continuous current for each loudspeaker. An addi-
tional 30 percent above the minimum amperage is recom-
mended to prevent peak voltage drops at the service entry.
NOTE: For best performance, the AC cable
voltage drop should not exceed 5 percent of
230 V. Make sure that even with AC voltage drops
that the AC voltage always remains within the operat-
ing windows.

POWERING UP THE 1100-LFC

The1100-LFC's Intelligent AC™ power supply suppresses
high-voltage transients up to several kilovolts, filters common
mode and differential mode radio frequencies (EMI), and sus-
tains operation temporarily during low-voltage periods.
When powering up the 1100-LFC, the following startup
events take place over several seconds.
1. Audio output is muted.
2. Voltage is detected and the power supply mode is auto-
matically adjusted as necessary.
3. The primary fan turns on.
4. The power supply ramps up.
5. The green Active LED on the user panel lights up, indi-
cating the loudspeaker is ready to output audio.
CAUTION: If the Active LED does not light up,
or the 1100-LFC does not output audio after
10 seconds, remove AC power immediately and ver-
ify that the voltage is within the required range. If the
problem persists, contact Meyer Sound Technical
Support.
CAUTION: If either of the 1100-LFC's circuit
breakers trip (the white center buttons disen-
gage), make sure to disconnect the AC power cable
before resetting the breakers. If necessary, contact
Meyer Sound for repair information.
1100-LFC OPERATING INSTRUCTIONS
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