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General Description <br />The SPC Series is the latest <br />development in RTE Deltec's <br />established line of puwer <br />condilioningproduds Thissenes <br />offers single-phase operation at <br />50Hz or 60Hz in the 5KVA to 15KVA <br />power range <br />The units lealure an enhanced tap <br />switching design that maintains <br />r5%output voltage regulation with <br />,nput ranging from -25%to .13%of <br />nominal To achieve dynamic <br />voltage regulation along with <br />common and transverse mode <br />noise refection, the system <br />combines electronic lap switching <br />with an isolated shielded trans <br />former <br />Top Switching Design <br />At the heart of the SPC Series is a <br />circuit board that selectively activates <br />the switching between transformer <br />taps to after the turns ratio between <br />primary and secondary windings <br />ElfwAivety, Ilub mlm 1 fei5ebur <br />lowers the output voltage to maintain <br />specified tolerances <br />Technological advances in the SPC <br />design make use of zero current <br />switching. This eliminates induced <br />SPC Series System Block Diagram <br />voltage problems and dVidT stress <br />by assuring that only one lap is on at <br />e time The result of reduced stress <br />on the switching elements is <br />excellent system reliability An <br />added feature provides for high <br />Dower factor loads <br />Noise Rejection Techniques <br />In addition to regulating voltage, the <br />SPC Series uses passive <br />techniques to isolate and shield its <br />transformer Thesebroadbardl <br />SPC Output Voltage Regulation <br />and Protection Curve <br />Output VAC <br />(% 0 f40rrxneil <br />(*5%) 110% <br />100% <br />1.5%) go% <br />90% <br />70% <br />60% <br />50% <br />40% <br />ad% <br />20% <br />10% <br />1-25%) (•t3%) <br />Input VAC <br />(%of Nominail LUnEarvftW ovnrvollape <br />prGUclgn PmWfion <br />iaieY J b00% A4m <br />—ems pis daaa <br />filtering techniques provide common - <br />mode noise refection of 140 dB <br />between 10 Hz and 1 MHz — the <br />range where virtually all noise <br />transients occur This also allows for <br />attenuation of transverse mode <br />noise to more than 60 dB at 100 <br />kHz Together, these voltage <br />regulation and noise attenuation <br />characteristics will eliminate the <br />effects of more than 9001e of all <br />problem -causing disturbances <br />Further, the low output impedance <br />of the SPC Series enables this <br />equipment to provide switching <br />power suppires with harmonic <br />frequency currents beyond the <br />normal line frequency the SPC <br />Series is especially designed to <br />meet these peak current <br />requirements while maintaining <br />effective noise refection This <br />design also results in minimized <br />distortion on the output line <br />The SPC Series is housed in a <br />streamlined cabinet that is suitable <br />for use in computer rooms or office <br />enveonmen!s. It is ready for easy <br />installation and wiring anywhere <br />convenient to the critical load <br />Optional Output distribution panels <br />further simplify installation by <br />allowing users to simply plug their <br />load into any of a selection of <br />receptacles available on the panels <br />The tap switching design, quick <br />response timeand noise rejection <br />features incorporated at these <br />power levels give the SPC Series <br />characteristics desirable to eco <br />nomically provide regulated power <br />to, sensitive electronic equipment <br />RTE Dasac Carpo Mw • 2727 Kunz Sheet - Sari DOW CA 92110 • Teophoro ie001 854 2658 • (619) 291 4211 on Caiifarlul • TW k 910 335 124 i <br />