The AR-PRO AC Line Voltage
Regulator is intended to protect computer, audio, video and other electronic
equipment from problems caused by AC line voltage irregularities-- sags,
brownouts, or overvoltages that can cause sensitive digital equipment
to malfunction, or, in extreme cases, to sustain damage. It accepts
single phase input AC voltages anywhere within two capture ranges, 88
to 134 or 170 to 264 volts, and converts them to the North American
standard 120 volts (or, if desired, 100V). Voltages outside the ranges
may be converted to usable levels, depending on how far out of range
they are and what is considered usable. For example, any voltage from
80 to 267 will be converted to 120V +9, -11.
The AR-PRO can handle loads totalling up to 30 amperes as long as the
input voltage is equal to or above 120V (low range) or 240V (high range).
For voltages below that level, its capacity must be derated at approximately
250 mA per volt.
Because the AR-PRO requires no switching to discriminate between a nominal
120V or a nominal 240V source, it can protect against a catastrophic
error in AC mains wiring (for example, in live performance situations,
where each act requires a special AC configuration, accidental connection
to 220V occurs surprisingly often). This feature also makes the AR-PRO
ideal as a component of a power distribution scheme suitable for worldwide
use, accommodating national voltages of 100, 120, 220, 240, or others
with equal ease and without need for readjustment.
The AR-PRO uses a design based on a 25-tap toroidal autoformer. The
toroidal design assures minimal leakage of stray magnetic fields and
a highly efficient, compact package. The AR-PRO's circuitry monitors
the incoming line voltage with each cycle. If a voltage change requires
that a different tap be selected, the new tap is electronically switched
in precisely at the zero-crossing, to avoid distorting the AC waveform.
If necessary, the AR-PRO can switch taps as often as once each cycle.
Most commercial voltage regulators using multiple-tapped transformers
switch taps with relays at uncontrolled times, thereby creating voltage
spikes! And unlike voltage regulators that employ ferro-resonant transformers,
the AR-PRO is not sensitive to small errors in line frequency, making
it ideal for use with generators.
The AR-PRO has twelve convenience outlets on its rear panel, and two
on the front panel. All outlets are regulated, spike-suppressed, and
filtered against RFI with a 3-pole filter. There are no controls except
a master circuit breaker, which serves as an on-off switch. Two bar-graph
meters each comprised of 21 LED's each indicate input voltage and output
current, while three other LED's indicate proper function (i.e., that
the output voltage is within ±5% of the selected voltage, or
above or below that range). One or more units may be turned on remotely,
either simultaneously or in sequence, with a simple low voltage switch
closure.
The AR-PRO is housed in a double space (3.5" high and 16"
deep) rack-mount chassis, and weighs only 50 lbs (23 kg). It is made
of extremely rugged heavy-gauge black powder-coated steel. Optional
adjustable rear rack ears (order part number RRM-2) allow it to be secured
in the rear for extra stability in mounting. It is supplied with a mating
female twist-lock connector ready to terminate your custom supply cable.
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SPECIFICATIONS |
Current Rating:
|
30 amperes
for input voltages of 120 (low range) or 240 (high range) or higher;
derate at 250 mA per volt to a minimum of 22.5A |
Input Voltage
Ranges: |
Functional
range 80 to 267 VAC; provides regulation + or -4% in ranges 88-134
and 170-264 VAC |
Efficiency: |
97% |
Meter Accuracy: |
Voltmeter
+ or -2 VAC; Ammeter, + or -10%; factory calibrated |
Spike Protection Modes:
|
Line to
neutral, neutral to ground, line to ground |
Spike Clamping Voltage:
|
TVSS rating
400V peak, L-N, N-G, L-G (tested to UL 1449) |
Response Time:
|
1 nanosecond
|
Maximum Surge Current:
|
6,500 amps
(8 x 20 µs pulse) |
Maximum Spike Energy:
|
80 joules |
Noise Attenuation:
|
Transverse
and common mode: 20 dB at 200 kHz, rising to >40 dB, 1 to 100
MHz |
RFI Filter
Approvals: |
UL, CSA,
VDE |
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