Wiring Ac Power Cables; Voltage Requirements; Current Requirements - Meyer Sound LINA Operating Instructions Manual

WIRING AC POWER CABLES

LINA ships with a gray powerCON 20 cable mount connector,
rated at 20 A, for assembling AC looping cables (Figure 11).
The pins on the powerCON 20 cable mount connector are
labeled as follows:
L (Line)
•
N (Neutral)
•
PE (Protective Earth or Ground)
•
SIDE
Figure 11: powerCON 20 Cable Mount Connector
How AC power cables are wired is determined by the type of
AC power distribution system used (see "AC Power Distribu-
tion" on page 13). When wiring AC power cables for single-line
systems, use one of the wiring schemes shown in Figure 12
and described in Table 2:
Black (L)
White (N)
Green (E)
U.S./Canada, 60 Hz
Figure 12: AC Wiring Scheme
Table 2: AC Wiring Scheme
Wire Color
U.S. / Canada European
60 Hz 50 Hz
Black Brown
White Blue
Green Green and Yellow
CAUTION: When wiring AC power cables and
distribution systems, it is important to preserve
AC line polarity and connect the earth ground at both
ends of the cable. LINA requires a grounded connec-
tion. Always use a grounded outlet and plug. It is
extremely important that the system be properly
grounded to operate safely and properly. Do not
ground-lift the AC cable.
FRONT REAR
L
N
Brown (L)
Blue (N)
Green/
yellow (E)
Europe, 50 Hz
Attach to the
Following
Terminal
Hot or live (L)
Neutral (N)
Protective earth / ground
(E or PE)

VOLTAGE REQUIREMENTS

LINA operates as intended when receiving AC voltage within
the following range:
90–264 V AC, 50–60 Hz
•
If the voltage drops below 90 V, the loudspeaker uses stored
power to continue operating temporarily; the loudspeaker
powers off if the voltage does not return to its operating range.
If the voltage rises above 275 V, the power supply could
become damaged.
CAUTION:
PE
!
always operate within the required operating
range, at least a few volts from the upper and lower
limits. This approach ensures that AC voltage variations
from the service entry—or peak voltage drops due to
cable runs—will not cause the loudspeaker's amplifier to
cycle on and off or cause damage to the power supply.

CURRENT REQUIREMENTS

Current draw for loudspeakers is dynamic and fluctuates as
operating levels change. Because 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 cir-
cuit breaker and cable specifications.
Idle Current — The maximum rms current during idle peri-
•
ods.
Maximum Long-Term Continuous Current — The
•
maximum rms current during a period of at least
10 seconds. The maximum long-term continuous current is
used to calculate temperature increases for cables and to
ensure that the size and gauge of each cable conforms to
electrical code standards. This current rating is also used
to select appropriately rated, slow-reacting thermal
breakers, which are recommended for loudspeaker power
distribution. In addition, the maximum long-term
continuous current can be used to calculate the AC
looping capability for LINA loudspeakers.
Burst Current — The maximum rms current during a
•
period of around 1 second. The burst current is used as a
rating for magnetic breakers. It is also used for calculating
the peak voltage drop in long AC cable runs according to
the following formula:
V pk (drop) = I pk x R (cable total)
Maximum Instantaneous Peak Current — A rating for
•
fast-reacting magnetic breakers.
LINA OPERATING INSTRUCTIONS
The power source for LINA should
15