Meyer Sound Stella-188, Operating Instructions Manual

Page: 13 / 32

STELLA OPERATING INSTRUCTIONS
13
Stella-188 Current Draw
The current draw for the Stella-188 is dynamic and fluctu-
ates as operating levels change for the connected loud-
speakers. 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. It is also used as a rating for slow-react-
ing thermal breakers.
■ 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 the following tables as a guide for selecting
cable gauges and circuit breaker ratings for the system’s
operating voltage.
The minimum electrical service amperage required by the
Stella-188 is the sum of the Maximum Long-Term Continu-
ous Current for all loudspeakers connected to the
Stella-188. An additional 30 percent above the minimum
amperage is recommended to prevent peak voltage drops at
the service entry.
NOTE: For best performance, the AC cable
voltage drop should not exceed 10 V, or
10 percent at 115 V and 5 percent at 230 V. Make
sure that even with AC voltage drops that the AC
voltage always remains within the operating window.
Current Draw for Stella-188 with Eight Stella-4s/Stella-4Cs
Current Draw

(Eight Stella-4s)
115
V AC
230
V AC
100
V AC
Idle Current 0.583 A rms 0.550 A rms 0.659 A rms
Maximum Long-Term
Continuous Current 2.20 A rms 1.20 A rms 2.50 A rms
Burst Current 2.40 A rms 1.40 A rms 2.80 A rms
Ultimate Short-Term
Current 6.80 A peak 3.50 A peak 7.60 A peak
Inrush Current 17.2 A peak 17.0 A peak 18.4 A peak
Current Draw for Stella-188 with 16 Stella-4s/Stella-4Cs
Current Draw

(16 Stella-4s)
115
V AC
230
V AC
100
V AC
Idle Current 0.943 A rms 0.751 A rms 1.078 A rms
Maximum Long-Term
Continuous Current 4.50 A rms 2.15 A rms 5.50 A rms
Burst Current 5.20 A rms 3.0 0A rms 6.70 A rms
Ultimate Short-Term
Current 13.0 A peak 9.0 A peak 15.0 A peak
Inrush Current 17.2 A peak 17.0 A peak 18.4 A peak
Current Draw for Stella-188 with Eight Stella-8Cs
Current Draw

(Eight Stella-8Cs)
115
V AC
230
V AC
100
V AC
Idle Current 0.943 A rms 0.751 A rms 1.078 A rms
Maximum Long-Term
Continuous Current 4.50 A rms 2.15 A rms 5.50 A rms
Burst Current 5.20 A rms 3.00 A rms 6.70 A rms
Ultimate Short-Term
Current 13.0 A peak 9.0 A peak 15.0 A peak
Inrush Current 17.2 A peak 17.0 A peak 18.4 A peak