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Since safety agencies dictate that the 20 amp Edison outlets
be overcurrent limited to 20 amps maximum, they are broken into
two groups: Group A includes the two front panel outlets and two
duplex receptacles on the rear. Group B is comprised of the re-
maining three duplex Edison outlets. Each group is protected by
its own 20A breaker. The twistlock is capable of a full 30 amps,
however.
Soft Start/Outlets On/Off Indicator: When power is first
applied to the IT-1230, the Soft Start feature is activated,
indicated by a steady yellow color. Soft Start limits the inrush
current to the IT-1230's transformer, which would otherwise be
excessive. The result is that the IT-1230's output voltage does
not reach its full level until several seconds have elapsed. When
it has reached its maximum level, the LED color turns to green,
indicating that all outlets are fully powered.
Should the power at the IT-1230's outlets go off for any
reason—either because the power switch is in the "off" position
or because an Extreme Voltage Shutdown has occurred, the LED
will light up red.
Extreme Voltage Shutdown: This LED status indicator is
normally off. It monitors a hazard particularly common in the
entertainment industry: wiring faults—for example, accidental
connection to 220V. The IT-1230 senses voltages that are so high
or low that operation would be impossible (under 80V or over
140V) and shuts the power down before damage can occur. Upon
initially applying power to the IT-1230, this indicator will be lit if
the input is receiving below 80 volts or more than 140 volts, and
power will not be applied to the IT-1230's outlets. If the unit has
been operating with an acceptable input voltage and then that
voltage goes out of the acceptable range, the IT-1230 will shut off
power to the outlet and this LED will begin flashing.
NOTE: If the mains power is below 80 volts and has caused
the IT-1230 to remove power from its outlets, the IT-1230 will not
restore power to the outlets until the mains voltage is more than
90 volts. If the mains power is above 140 volts and has caused
the IT-1230 to remove power from its outlets, the IT-1230 will not
restore power to the outlets until the mains voltage is less than
130 volts. The reason for this is to prevent the power oscillating
on and off in marginal conditions.
LED Voltmeter: This three-color, 20-LED bargraph is an
accurate, self-checking AC voltmeter that continually measures
the IT-1230's input voltage. The meter reads from 90 to 128 volts
in two-volt steps. The normal range voltages are indicated in green,
with moderate and extremely high or low voltages in yellow and
red respectively (see chart on the previous page). The voltmeter
provides three special flashing patterns to indicate abnormal power
conditions:
1. If only the single LED located beneath the number 90 on
the voltmeter flashes, voltage at the IT-1230 input is below
90 volts. Power to the IT-1230 outlets will remain on unless
the incoming voltage falls below 80.
2. If all of the LEDs on the voltmeter flash, voltage at the
input is between 130 and 140 volts. Power to the IT-1230's
outlets will remain on unless the incoming voltage exceeds
140.
3. If none of the LEDs on the voltmeter are lit, and the
Extreme Voltage LED indicator is flashing continuously, then
the IT-1230 has shut down power to its switched outlets due
to input voltage below 80 volts or above 140 volts.
The IT-1230's voltmeter has a basic accuracy of plus or mi-
nus two volts, and extreme cold or heat may cause an additional
one volt of error. Please note that the voltage reading is advisory
only. The IT-1230 does not compensate for high or low line volt-
age. If you frequently move your rack to different locations, derive
power from generators, use long extension cords, travel interna-
tionally, or are in an area prone to brownouts, you may benefit
from the use of one of Furman's AC Line Voltage Regulators.
NOTE: Because the voltmeter reads the input voltage
BEFORE the circuit breaker/on-off switch, its LEDs stay on when-
ever the IT-1230 is plugged in, even when the power switch is off.
This feature allows you to check voltage before powering up your
equipment. The LEDs are designed for continuous use. They
consume little power, just a few cents worth a month, like a clock.
Ground Fault Current Interrupter (GFCI): The GFCI built
into the IT-1230 is a special kind of circuit breaker that detects an
imbalance in the current flowing in the two hot legs. The "missing"
current is presumed to be flowing through the ground conductor
(the round pin on an AC outlet). Ground current often indicates a
dangerous partial or full short circuit. If an imbalance is detected,
the GFCI will trip the main breaker. To restore operation, correct
the fault and turn the unit on again. 4-6 mA of current is enough to
cause the GFCI to trip; to troubleshoot this type of problem, start
with nothing connected to the IT-1230. Then add each piece of
gear until the GFCI trips. Contact the manufacturer of the suspect
unit for possible solutions.
You should test for proper operation of the GFCI once a month
by pushing the button marked GFCI TEST. If the GFCI is working
properly, this will cause the GFCI TEST main breaker to trip and
to cut off power. You can restore operation after a test by once
again turning the unit ON.
IT-1230 SPECIFICATIONS
Output current:
30 amps (3600 watts at 60/120 V 1 ø AC, 60 Hz)—
Technical power, for electronic equipment (not lighting)
only, per NEC Article 530.
Voltage Ranges:
Normal, 90-130; Marginal (flashes alert), 80-90 or
130-140; Extreme (causes shutdown), below 80 or
above 140
Inlet:
30A NEMA L14-30P twistlock inlet connector, rear
Outlets:
Rear: 30A NEMA L14-30R twistlock
plus 10 NEMA 5-20 (20A Edison) outlets
Front: 2 NEMA 5-15 outlets suitable for 20A use
Isolation, Input to Output: Breakdown Voltage: 1500V minimum
Leakage current: 40 mA maximum
Capacitance: 300 pf maximum
Turns Ratio:
1:1; windings separated with Faraday shield
Transformer Regulation: (Full load/no load) 3% at full load
Spike Protection Modes: Line to neutral, neutral to ground, line to ground
Spike Clamping Voltage: TVSS rating of 400 volts peak,
L-N, N-G, L-G (tested to UL-1449)
Spike Response time:
1 nanosecond
Maximum surge current: 6,500 amps (8 x 20 mS pulse)
Maximum spike energy: 80 joules per mode, 240 joules total
Noise attenuation:
Differential mode: Greater than 40 dB
Transverse mode: Greater than 60 dB
Common mode: Greater than 80 dB, 1 to 200 MHz
Mechanical:
Dimensions: 5.25" H x 19" W x 17" D.
Weight: 66 lbs. (30 kg).
Construction: Steel chassis, powder coated;
glass epoxy printed circuit boards
Power Consumption:
8.5 watts for display and control circuits,
independent of actual load
The IT-1230 is manufactured in the United States of America
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