User manual FURMAN AR2330D

[. . . ] All equipment should be checked first, to be sure that 240V is a suitable voltage (normally listed near the power cord). If a lower voltage is desired, the AR-2330D should have its internal jumper changed to 220 or 230 volts. If in doubt, consult your dealer. 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 capacity must be derated at approximately . 15 amperes per volt. [. . . ] The toroidal design assures minimal leakage of stray magnetic fields, and, because of its high efficiency, a very compact size for its rating. The Voltage Regulator's circuitry monitors the incoming line voltage with each cycle, comparing it to an extremely precise voltage reference, accurate to ±0. 15%. If a voltage fluctuation requires that a different tap be selected, the new tap is electronically switched exactly at the zero-crossing, to avoid distorting the AC waveform. Some commercial voltage regulators using multiple-tapped transformers switch taps at uncontrolled times, thereby creating voltage spikes and clicks that can leak into the audio!Hysteresis in the switching circuits avoids "chatter" or unnecessary switching 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 errors in line frequency, making them ideal for use with generators. Fuses and Circuit Breakers There are three fuses and one fast-acting magnetic circuit breaker in the AR-2330D. A precision 30 amp magnetic circuit breaker is used as the on/off switch. 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. A fast-blow 250 mA amp fuse is located inside the unit, as previously mentioned. To replace it, the unit must be completely disconnected from all power and removed from its rack. The six hex head screws and one Allen head screw holding the top cover must be removed. A Fast Blow 1 amp fuse protects a low current auxiliary winding on the large transformer. Supply Cable Wiring The AR-2330D's rear panel provides a NEMA L14-30P male inlet connector; a NEMA L14-30 cord mounted female connector is included with the unit. Wire the two hot leads (black) to X and Y (black, and white or red), and the equipment ground (green) to G. It is essential that all equipment powered by an AR-2330D be properly grounded!Never cut off the power cord ground pin or use a "cheater" adaptor on any of your equipment! 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. 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 shutdown. 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 leakage, but nevertheless, due to its high capacity, it can radiate an appreciable magnetic field. Therefore, we recommend that it not be positioned adjacent to sensitive, low level signal processors, especially mic preamps, mixers, tape recorders, etc. Power amps may be more suitable "rack neighbors. " As with any rackmount equipment, be sure to use 10-32 machine screws for mounting in the rack's tapped holes, and to avoid marring the front panel finish, use plastic washers under the screw heads. Output Voltage Monitoring A green LED labelled OUTPUT IN REGULATION indicates proper function (i. e. , that the output voltage of the selected output voltage is within ±10V of the 240V output. Your equipment should work normally when this light is on, and often will work satisfactorily even when it is off. (EQUIPMENT GROUND) G FRONT VIEW 12 5/ 25 . [. . . ] 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. They are caused unpredictably by electric motors switching on or off (on the premises or outside), utility company maintenance operations, nearby lightning strikes, and other factors. Spikes (also called surges or transients) are absorbed by special components called MOV's in the ARseries to provide safe voltage levels to protect your equipment. [. . . ]