Furman AR-2330D User manual

AR-Series Features
● Output capacity 30 amps
● Output voltage can be changed to 220V or 240V with
internal jumper
● Usable range for most equipment is an ad di tion al 10% above
and below the capture ranges shown in Specifi cations (pg. 4)
● One twist lock inlet and one regulated, con di tioned
twistlock outlet on rear panel
● Eight-tap toroidal autoformer
● 10-LED bargraph Input Voltage meter
● 10-LED bargraph true RMS reading Output Current meter
● Extreme overvoltage/undervoltage causes in stant
shutdown, protecting equip ment
● Extreme Voltage Shutdown indicator LED
● Output In Regulation in di ca tor
● Fast-acting user-accessible circuit breaker pro tects against
overload or shorts. Also acts as ON/OFF switch.
● Low stray magnetic fi eld
● Low noise, variable speed fan provides cooling for heavy-
duty, continuous op er a tion
● Rugged, two-space rack unit weighs only 49 lbs. (22 kg.)
Determine the Correct Voltage
Is 240V the correct voltage for your application?
The AR-2330D is factory set for 240V output. All equipment
should be checked fi rst, to be sure that 240V is a suit able volt-
age (normally listed near the power cord). If a lower volt age is
desired, the AR-2330D should have its internal jumper changed
to 220 or 230 volts. If in doubt, consult your dealer.
AC Line Voltage Reg u la tor
Owner’s Manual
General Information
Thank you for choosing a Furman AR-2330D AC Line Volt age
Reg u la tor. An AR-Series regulator is the perfect ac ces so ry to any
au dio, video, or computer rackmount system re quir ing clean,
fi l tered, and regulated AC power for optimum op er a tion.
Furman Voltage Regulators are intended to protect sensitive
electronic equipment from problems caused by AC line voltage
irregularities—brownouts or overvoltages that can cause audio
ton al changes, digital equipment malfunction (such as loss of
MIDI pro grams or other data), or, in extreme cases, permanent
dam age. The AR-2330D accepts input voltages over a wide AC
volt age range (see table above) converts them to, and stabilizes
them at ±10V for 240V output. (The output voltage can be changed
to 220V or 230V with an internal jumper.) Voltages approximately
±10% beyond the AR-2330D’s range may be converted to usable
levels, depending on the requirements of the equipment. See
Figure 1.
The AR-2330D has one twistlock inlet and one twistlock out let
on the rear panel. The outlet is regulated, spike-suppressed, and
EMI/RFI fi ltered. There are no controls except an on-off break er
switch.
Limitations:
The AR-2330D is for use with AC voltage only.
DC voltages should never be applied to it. Also, it does not change
or regulate line frequency. The output frequency will always be
the same as the incoming line fre quen cy.
AR-2330D front view
MODEL AR-2330D
AR-2330D rear view, shown with optional RRM-2 rear rack ears
Furman Sound, Inc.
1997 South McDowell Blvd.
Petaluma, California 94954-6919 USA
Phone: [phone]
Fax: [phone]
www.furmansound.com
E-mail: [email protected]

Output Current Monitoring
The AR-2330D’s ammeter reads AC current from 0 to 30
amps, in 3-amp steps. Currents above the 30 amp limit read red,
with yel low in di cat ing a warning zone. Please keep in mind that
the am me ter may not read at all if the total load connected is
less than 2 amps (240 watts). This is a likely oc cur rence if
only rel a tive ly low pow er, sig nal processing-type equipment is
connected. With the master switch off, the ammeter can still
read, but will only do so if equip ment drawing at least 2 amps is
connected to the un switched outlet.
The ammeter is capable of giving a re li able in di ca tion of
current drawn by all kinds of equipment, thanks to its true-RMS-
read ing circuitry. This means that loads like pow er amplifi ers, which
are primarily ca pac i tive and in duc tive, will read as accurately as
purely resistive loads like heaters. Ammeters that respond only to
average AC cur rent may vary widely from RMS reading meters.
Design
The AR-2330D uses a design based on an eight-tap toroidal
au to form er. The toroidal design assures minimal leakage of
stray mag net ic fi elds, and, because of its high effi ciency, a very
compact size for its rating. The Voltage Regulator’s circuitry mon-
i tors the incoming line voltage with each cycle, comparing it to
an ex treme ly precise voltage reference, accurate to ±0.15%. If a
voltage fl uc tu a tion requires that a different tap be selected, the
new tap is elec tron i cal ly switched ex act ly at the zero-crossing,
to avoid distorting the AC waveform. If nec es sary, it can switch
taps as often as once each cycle. Some com mer cial voltage
regulators using mul ti ple-tapped trans form ers switch taps at
uncontrolled times, there by cre at ing voltage spikes and clicks
that can leak into the audio! Hys ter e sis in the switch ing circuits
avoids “chat ter” or un nec es sary switch ing back and forth between
adjacent taps. And un like voltage regulators that em ploy
ferro-res o nant trans form ers, the Fur man AR-Series is not
sensitive to small er rors in line fre quen cy, making them ideal for
use with gen er a tors.
Supply Cable Wir ing
The AR-2330D’s rear pan el provides a NEMA
L14-30P male inlet connector; a NEMA L14-30 cord mount ed
fe male con nec tor is in clud ed with the unit. Please refer to the
“Rear View” wiring diagram at right.
Wire the two hot leads (black) to X and Y (black, and white or
red), and the equip ment ground (green) to G.
It is essential that all equip ment pow ered by an AR-2330D be
properly ground ed!
Never cut off the power cord ground pin or use a “cheat er”
adap tor on any of your equipment!
Installation
The AR-2330D is designed for mounting in a standard
19-inch rack. Because of its weight, the best position for it
is at the bottom of the rack. Its toroidal transformer minimizes
magnetic leak age, but nevertheless, due to its high capacity,
it can radiate an ap pre cia ble magnetic field. Therefore, we
recommend that it not be po si tioned adjacent to sen si tive, low
level signal processors, es pe cial ly mic preamps, mixers, tape
recorders, etc. Power amps may be more suit able “rack neigh-
bors.” As with any rackmount equip ment, be sure to use 10-32
machine screws for mount ing in the rack’s tapped holes, and to
avoid mar ring the front panel fi n ish, use plas tic wash ers un der
the screw heads.
Maximum Load
The AR-2330D can handle loads totalling up to 30 amperes
as long as the input voltage is equal to or above the selected
output voltage (240V). For voltages below that level, its ca pac i ty
must be derated at approximately .15 amperes per volt. See
Figure 2. To cope successfully with worst-case brown out
conditions, you should take this into account. An easy way to
calculate this yourself is to multiply input voltage by maximum
input current (ex. 200V x 30A = 6000 watts) to get the max i mum
pow er the unit can han dle at this input volt age. Then divide this
number by the out put volt age (6000/240 = 25 amps). If your load
draws any more than 25 amps, it will cause the input current to
rise above 30 amps and will then trip the break er.
Extreme Voltage Protection
The AR-Series includes special circuitry to sense over- and
un der-voltages and positively shut down the output before
possible damage is done. For the AR-2330D, overvoltages are
those over 300V. When the input voltage exceeds that limit, the
power will cut off. It will come back on automatically when the
ov er volt age is reduced to 285V or lower. The red LED labelled
EX TREME VOLT AGE SHUT DOWN in di cates the shut down
condition. The output is also shut down for extremely low input
volt ag es, less than 158V.
To provide additional protection against a catastrophic high
voltage condition, voltages over approximately 300V may cause
an in ter nal fuse to blow. This is a 250 mA/250V fuse and requires
removal of the top cover. If this unlikely condition occurs, please
remove power from the unit fi rst.
Fuses and Circuit Breakers
There are three fuses and one fast-acting magnetic circuit
break er in the AR-2330D.
1. A precision 30 amp magnetic circuit breaker is used as the
on/off switch. If the input to the unit exceeds 30 amps, the break er
will trip. Be sure to reduce your load before re-powering the unit,
or it will likely trip again. Refer to the previous section “Maximum
Load” if you are uncertain why the breaker is tripping, or want to
understand the relationship between input voltage and current vs.
output voltage and current.
2. A fast-blow 250 mA amp fuse is located inside the unit, as
previously mentioned. To replace it, the unit must be com plete ly
dis con nect ed from all power and removed from its rack. The six
hex head screws and one Allen head screw holding the top cov er
must be re moved.
3. A Fast Blow 1 amp fuse protects a low current auxiliary
wind ing on the large transformer.
Input Voltage Monitoring
The row of ten LED’s at the top left of the front panel make up
a meter that indicates INPUT VOLTAGE. Only one LED will light
up at a time. There are two red LED’s at the endpoints. When
lit, they indicate that the input voltage may be above or below
the point where it can be restored to the selected nominal output
voltage (though it may still be restored to a usable level) but is not
high or low enough to cause an extreme voltage shut down.
Output Voltage Monitoring
A green LED labelled OUTPUT IN REGULATION indicates
prop er function (i.e., that the output voltage of the selected out put
volt age is within ±10V of the 240V output. Your equipment should
work nor mal ly when this light is on, and often will work sat is fac to ri ly
even when it is off.

Three Year Limited War ran ty
Furman Sound, Inc., having its principal place of business at 1997 South
McDowell Blvd., Petaluma, CA 94954 (“Manufacturer”) warrants its AR-2330D (the
“Product”) as follows:
Manufacturer warrants to the original Purchaser of the Product that the Product
sold hereunder will be free from defects in material and workmanship for a period
of three years from the date of purchase. The Purchaser of the product is allowed
fi fteen days from the date of purchase to complete warranty registration by mail or
on-line at the Furman website. If the Product does not conform to this Limited War-
ranty during the warranty period (as herein above specifi ed), Purchaser shall notify
Manufacturer in writing of the claimed defects. If the defects are of such type and
nature as to be covered by this warranty, Manufacturer shall authorize Purchaser to
return the Product to the Furman factory or to an authorized Furman repair location.
Warranty claims should be accompanied by a copy of the original purchase invoice
showing the purchase date; this is not necessary if the Warranty Registration was
completed either via the mailed in warranty card or on-line website registration. Ship-
ping charges to the Furman factory or to an authorized repair location must be prepaid
by the Purchaser of the product. Manufacturer shall, at its own expense, furnish a
replacement Product or, at Manufacturer’s option, repair the defective Product. Return
shipping charges back to Purchaser will be paid by Manufacturer.
THE FOREGOING IS IN LIEU OF ALL OTHER WARRANTIES, EXPRESS
OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE IMPLIED WARRANTIES
OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE. Manu-
facturer does not warrant against damages or defects arising out of improper or
abnormal use of handling of the Product; against defects or damages arising from
improper installation, against defects in products or components not manufactured
by Manufacturer, or against damages resulting from such non-Manufacturer made
products or components. This warranty shall be cancelable by Manufacturer at its
sole discretion if the product is modifi ed in any way without written authorization
from Furman Sound. This warranty also does not apply to Products upon which
repairs have been affected or attempted by persons other than pursuant to written
authorization by Manufacturer.
THIS WARRANTY IS EXCLUSIVE. The sole and exclusive obligation of Manu-
facturer shall be to repair or replace the defective Product in the manner and for the
period provided above. Manufacturer shall not have any other obligation with respect
to the Products or any part thereof, whether based on contract, tort, strict liability
or otherwise. Under no circumstances, whether based on this Limited Warranty or
otherwise, shall Manufacturer be liable for incidental, special, or consequential dam-
ages. Manufacturer’s employees or representatives’ ORAL OR OTHER WRITTEN
STATEMENTS DO NOT CONSTITUTE WARRANTIES, shall not be relied upon by
Purchaser, and are not a part of the contract for sale or this limited warranty. This
Limited Warranty states the entire obligation of Manufacturer with respect to the
Product. If any part of this Limited Warranty is determined to be void or illegal, the
remainder shall remain in full force and effect.
Service
Before returning any equipment for repair, please be sure that it is ad e quate ly
packed and cushioned against damage in ship ment, and that it is insured. We
suggest that you save the original pack ag ing and use it to ship the product for
servicing. Also, please en close a note giving your name, address, phone number
and a de scrip tion of the problem.
NOTE: All equipment being returned for repair must have a Re turn
Authorization (R/A) Number. To get an R/A Number, please call the Fur man Ser-
vice De part ment, [phone] ext. 40, be tween 8 a.m. and 5 p.m., U.S. Pacifi c
Time. Please display your R/A Number prominently on the front of all packages.
Regulation Range
Functional Range
High Voltage Shutdown
Low Voltage Shutdown
Output Volatge
Input Voltage
140 160 180 200 220 240 260 280 300 320
280
260
240
220
200
180
160
Available Output Current
Input Voltage
140 160 180 200 220 240 260 280 300 320
30
29
28
27
26
25
24
Figure 2:
AR-2330D Available Output Current vs. Input Voltage
Figure 1:
AR-2330D Output Voltage vs. Input Voltage
125/250V
.
30A.
NEMA
L14-30
G
W
X
Y
(EQUIPMENT�
GROUND)
(NEUTRAL)
(HOT LEAD)
(USA 220-240 ONLY)
FRONT VIEW
REAR VIEW
G
W
X
Y
Gold Screw
Silver Screw
Green Screw
Gold Screw

Spike Clamping Voltage: Initial turn-on at 390V peak L-N; 680 volts peak N-G, L-G
Response Time: 1 nanosecond
Maximum Surge Current: 6,500 amps (8 x 20 ms pulse)
Maximum Spike Energy: 130 joules L-N, 160 joules N-G, L-G, 450 joules total
Noise Attenuation: Transverse and common modes:
Greater than 60 dB, 1-200 MHz
Dimensions: 3.5" H x 19" W x 17" D (8.9 x 48.3 x 43.2 cm)
Weight: 49 lbs. (22 kg)
Current Rating: 30 amperes for input voltages of 248/238/228* or higher; derate
at .15A per volt to a minimum of 24.8A
Output Voltage: 240 VAC. Can be changed to 220V or 230V via internal jumper
“In Regulation” Ranges: Provides regulation ±10 VAC in the following ranges:
240V mode, 190-287V; 230V mode, 181-276V; 220V mode,
174-264V
Shutdown Range: Below 150V or above 300V
Inlet: One 30A NEMA L14-30P twistlock connector (male)
Outlet: One 30A NEMA L14-30R twistlock connector (female)
Voltmeter Accuracy: ±10 VAC
Spike Protection Modes: Line to neutral, neutral to ground, line to ground
AR-2330D SPECIFICATIONS
1 9 9 7 S . M c D o w e ll B l vd .
Petalum a , C A . 9 4 9 5 4
Ph. ( 7 0 7 ) 763- 1 0 1 0
Fa x ( 7 07) 763 - 1 3 1 0
www. FurmanSou n d.c o m
VOLTAGE REGULATION:
The AC line voltage is a number indicating the nom i nal electrical potential that has been adopted in a region for powering electrical equip-
ment of all kinds. In most of North America it is 117-120 volts AC; in Japan, 100 volts; and in many other countries 220, 230, or 240V. The actual voltage can fall below or rise
above this nominal level due to brown outs, power cut backs, use of substandard wiring, and other causes. These deviations can cause poor per for mance or malfunction. A
regulator is a de vice which, through use of a transformer, corrects the voltage deviation by step ping it up or down so that it is as close as possible to the nominal level.
SPIKE:
A pulse of energy on the power line. Spikes can have voltages as high as 6000 volts. Though they are usually of very short duration, the en er gy they contain can
be considerable, enough to damage sensitive solid-state com po nents in au dio and com put er equipment. Spikes can also foul switch contacts and degrade wiring insulation.
They are an un avoid able com po nent of electric power. They are caused unpredictably by electric motors switching on or off (on the premises or outside), utility company
main te nance op er a tions, nearby light ning strikes, and other fac tors. Spikes (also called surges or transients) are absorbed by special com po nents called MOV’s in the AR-
se ries to provide safe voltage levels to pro tect your equip ment.
RFI/EMI INTERFERENCE:
Noise from RFI (Radio Frequency Interference) or EMI (Electro Magnetic Interference) involves lower voltages and less en er gy than is
found in spikes, but it is continuous rather than transient in nature. It is not likely to cause physical damage, but it can certainly be an noy ing, producing static in audio circuits,
“snow” on video screens, or gar bled data in computers. Noise can be introduced into AC lines by nearby radio trans mit ters, certain kinds of lighting, electric motors, and
others. Because noise oc curs at higher fre quen cies than the 50 or 60 Hz AC line, it can be effectively reduced through use of low-pass fi ltering.
Defi nitions