En­er­gy­ef­fi­cient pump drive so­lu­tions

DEMM Engineering & Manufacturing - - CON­TENTS -

Run­ning per­ma­nently at full speed may work for you but not so much for your pump drives. Speed con­trol bal­anced to ac­tual re­quire­ments greatly en­hances the en­ergy ef­fi­ciency of pump sys­tems. Nord Drivesys­tems sup­plies com­plete pre-as­sem­bled dis­trib­uted drive units for a wide per­for­mance range up to 22 kW. In ad­di­tion to en­ergy sav­ings of up to 60 per­cent, users ben­e­fit from re­duced noise emis­sions, low wear, and in­creased plant ser­vice life as well as the ecologi- cal ad­van­tages.

Nord Drivesys­tems in­te­grated pump drives can store up to four op­er­a­tion modes which can be dis­played and changed di­rectly at the con­trol unit. The SK 200E se­ries com­prises of re­li­able and eco­nom­i­cal fre­quency in­vert­ers, espe­cially tai­lored to pump ap­pli­ca­tions that re- quire pre­cise ad­just­ments of power out­put; th­ese are com­pat­i­ble with mains volt­ages world­wide.

For im­proved cus­tomer ease, Nord con­fig­ures com­plete drive sys­tems for var­i­ous ap­pli­ca­tion ar­eas (IP55/IP66, ATEX zone22/3D), and its in­te­grated process and PI con­troller func­tions en­ables the fully-au­to­mated con­trol of process vari­ables as well as com­pen­sa­tion of dis­tur­bances. This is ap­pli­ca­ble both in stand-alone and mo­bile ap­pli­ca­tions as well as in com­plex set-ups with sev­eral drives.

Martin Broglia, Man­ag­ing Di­rec­tor of Nord Drivesys­tems Aus­tralia says that thanks to two ana­logue in­puts, the in­vert­ers can di­rectly process sen­sor data such as pres­sure or flow rate. “Op­tional sig­nal and power plug con­nec­tors fa­cil­i­tate han­dling and en­sure com­pat­i­bil­ity. A pro­gram­mable en­ergy-sav­ing func­tion au­to­mat­i­cally re­acts to par­tial load op­er­a­tion – in­creas­ing ef­fi­ciency and sig­nif­i­cantly re­duc­ing run­ning costs.”

Op­er­a­tion is straight­for­ward and flex­i­ble via con­trol ter­mi­nals, bus, or via an op­tional po­ten­tiome­ter that en­ables ad­just­ments di­rectly at the in­verter. “In an ef­fort to re­duce labour hours whilst be­ing cog­nisant of pro­duc­tiv­ity lev­els, up to four op­er­a­tion modes can be stored to save on set- up time,” Martin says.

In ad­di­tion, the cus­tomised pa­ram­e­ters can be quickly ex­ported to other units via a plug­gable stor­age mod­ule, the sys­tem bus, or Eth­er­net in­ter­faces. Once again keep­ing pro­duc­tiv­ity in mind, with con­trol cab­i­nets no longer re­quired, the de­cen­tralised op­tion min­imises ca­bling ef­fort for users, and since the in­verter is sup­plied pre-as­sem­bled the elec­trotech­ni­cal ef­fort do­ing in­stal­la­tion is nom­i­nal.

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