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Technote MT 14

TECHNICAL NOTES
210-VI
AMENDMENT MT-14

SUBJECT: ENG--Distribution of Variable Speed Drive (VSD) for Irrigation Pumping; Montana VSD Stockwater Examples (Attachment 1); and Variable Speed Drive - Economic Comparison Excel Spreadsheet; an updated Montana Tabulation Sheet.

If you encounter any problems with the files provided on this page, please contact Bruce Krueger at 406-587-6834.

A printer-friendly version of this transmittal is available in Acrobat Reader format.

Montana Technical Notes; Amendment MT-14 (PDF; 17 KB)

To: All Offices

Effective Date: This is effective upon receipt.

Explanation of Material: In today's world, many irrigation and stockwater pumps are being paired with a Variable Speed Drive (VSD), or Variable Frequency Drive to make existing systems more energy efficient. Clare Prestwich, Irrigation Engineer from the National Water and Climate Center drafted up a VSD document with examples that will eventually be transmitted from NHQ. Until then, use this document as a reference any time you are working with an irrigation or stockwater pump which will be paired with a VSD unit.

Filing Instructions:

  1. Remove and replace the updated Montana Tabulation Sheet.
  2. After Montana Engineering Technical Note MT-13 insert MT-14, Variable Speed Drive (VSD) for Irrigation Pumping.
  3. After Montana Engineering Technical Note MT-14, insert Montana VSD Stockwater Examples, MT-14(Attachment 1).
  4. After Montana Engineering Technical Note MT-14(Attachment 1), retrieve the Variable Speed Drive - Economic Comparison excel worksheet from the Montana Engineering Spreadsheet List at:

If you have any questions, please call Randy Pierce, Irrigation Engineer at (406) 587-6860.

 

/s/ by Steve Becker (1/26/2010) / rg

STEVE BECKER
State Conservation Engineer

DIST: Electronic