Using a 40HP 600V Fan or Centrifugal Pump Application<\/h3>

Switching a 40HP, 600V fan from a Direct-On-Line (DOL) starter to a Variable Sine Wave Drive (VFS \u2013 the latest advancement in VFD Technology):<\/p>

• Running at 55Hz instead of 60Hz typically produces substantial cost savings on the monthly electrical charges<\/strong> due to the affinity law for fans and Centrifugal pumps, which states that power consumed drops cubically with speed reduction.<\/li>
• 11 Month ROI @ 55Hz<\/strong>: Save $547\/month on the electrical bill when SmartD runs the fan at 55Hz instead
  of 60Hz speed. Calculation and conditions shown below.<\/li>
• 7 month ROI @ 50Hz<\/strong>: Save $987\/month when using the same calculations and conditions but averaging
  50Hz.<\/li><\/ul>

  Note that with this conservative 55Hz example, we are not yet including the following additional savings. <\/strong>With Smart-D VFS product (which can even exceed the basic savings calculated below):<\/p>

  • The calculations for automating the speed variation below the fixed speed<\/li>
  • The calculations for eliminating hard starts (inrush current draw)<\/li>
  • Motor extended life from Smart-D\u2019s Sine Wave power (not traditional VFD square waves)<\/li>
  • Driven Equipment extended life due to the best available soft starting<\/li>
  • Elimination of all external VFD filters and meeting IEEE-519 Hamonic mitigation at the VFD.<\/li>
  • Reduced footprint and labour reductions for traditionally filtered VFD cabinets and MCCs<\/li><\/ul>

    Power Reduction Calculation Example \u2013 Using a conservative 8% drop in speed (55Hz instead of 60Hz):
    <\/strong>Running a fan at 55Hz instead of 60Hz means the speed ^{55<\/sup>\u2044_{60<\/sub> = 0.917 is reduced of full speed.
    According to affinity laws, the power drawn by the fan drops by the cube of this ratio:<\/p>}}

    Power_{55Hz<\/sub> = Power60Hz<\/sub> \u00d7 (^{55<\/sup>\u204460<\/sub>)3<\/sup> \u2248 40HP \u00d7 0.77 = 30.8HP<\/p>}}

    Hence, the fan at 55Hz consumes about 77% of the power<\/strong> it does at 60Hz.<\/p>\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t

    \n\t\t\t\t\t\t\t\t\t

    Monthly Savings Estimate<\/strong>
    Assuming the fan runs continuously (24\/7) and the efficiency (including motor and drive) is about 95%. Convert HP to kW for energy calculations:
    1HP = 0.746kW
    Full load power at 60Hz = 40HP \u00d7 0.746 \u2248 29.84kW<\/p>

    Power at 55Hz:
    29.84kW \u00d7 0.77 \u2248 22.18kW<\/p>

    Energy usage per month (30 days, 24 hours per day):
    Energy_{DOL<\/sub> = 29.84kW \u00d7 24 \u00d7 30 \u2248 21,484kWh
    EnergyVFD <\/sub>= P22.18kW \u00d7 24 \u00d7 30 \u2248 16,017kWh<\/p>}

    So, anticipated monthly energy savings:
    21,484kWh \u2212 16,017kWh \u2248 5,467kWh<\/p>

    Assuming an Alberta commercial electricity rate of $0.10\/kWh:
    Monthly savings \u2248 \ud835\udfd3, \ud835\udfd2\ud835\udfd4\ud835\udfd5kWh \u00d7 $\ud835\udfce. \ud835\udfcf\ud835\udfce = $\ud835\udfd3\ud835\udfd2\ud835\udfd5<\/strong><\/p>

    Actual savings may go up or down with fan load profile, utility rates, and seasonal usage patterns.<\/p>

    Summary Table<\/strong><\/p>

    Operating Mode<\/th>	Power Draw (kW)<\/th>	Monthly Energy (kWh)<\/th>	Estimated Cost (@$0.10\/kWh)<\/th>	Monthly Savings<\/th><\/tr><\/thead>
    DOL, 60Hz<\/td>	29.84<\/td>	21,484<\/td>	$2,148<\/td>	\u2014<\/td><\/tr>
    VFD, 55Hz<\/td>	22.18<\/td>	16,017<\/td>	$1,602<\/td>	$547<\/strong><\/td><\/tr><\/tbody><\/table> Typical User cost for a SMART D SDB Series NEMA 1 VFD Panel (S3L Frame) with the following:<\/strong><\/p>\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t \n\t\t\t\t\t\t \n\t\t\t\t\t \n\t\t\t \n\t\t\t\t\t\t \n\t\t\t\t\t\t\t\t\t a. 1 VFD, 40HP, 600V, 44A, 110% OL b. 1 Input Low harmonic Filtration system containing c. 1 of a 3-Level Active Front End (For IEEE-519 Levels at the VFD <5% THDi) with regeneration braking (no Dynamic Brake Resistor needed) d. 1 Output Sine Wave and Common Mode filtration systems e. 1 Touch Screen HMI (Programmable) f. 1 Controls terminal block; 6 DI, 3 DO (1 Form C relay, 2 Form A relays), 2 STO DI, 3 AI, 2 AO g. 1 Modbus TCP Ethernet native protocol software h. 1 Ethernet IP native protocol software i. 1 BACnet IP Ethernet native protocol software j. 1 Pair of Ethernet Ports k. 1 3C3 level Conformal Coating Treatment<\/p>\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t\t<\/div>\n\t\t<\/div>\n\t\t\t\t \n\t\t\t \n\t\t\t\t\t\t \n\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t \n\t\t\t\t\t\t\t\t\t NO MORE 6 to 8 ft Cabinets \u2191<\/strong><\/em><\/p> With the elimination of any Line & Load, filtering can now savespace and cost on cabinets.<\/p>\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t\t<\/div>\n\t\t<\/div>\n\t\t\t\t\t<\/div>\n\t\t<\/section>\n\t\t\t\t \n\t\t\t\t\t\t\t\t\t Typical Price is $7,034 CAD per pane<\/strong>l, before shipping costs. Not including Installation, Start-up & Commission.<\/p>\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t \n\t\t\t\t\t\t \n\t\t\t\t\t \n\t\t\t \n\t\t\t\t\t\t \n\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t\t<\/div>\n\t\t<\/div>\n\t\t\t\t \n\t\t\t \n\t\t\t\t\t\t \n\t\t\t\t\t\t\t\t\t KEEPING THE PANEL SMALL \u2190 <\/strong><\/em><\/p> This SmartD VFS (VFD system) INCLUDES all possible Advanced Line & Load Filter options.<\/p> Filters are re-engineers to be embedded at the PCB (Solid State) level.<\/p>\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t\t<\/div>\n\t\t<\/div>\n\t\t\t\t\t<\/div>\n\t\t<\/section>\n\t\t\t\t \n\t\t\t\t\t\t\t\t\t APPENDIX – SAVINGS ON VFD PANELS<\/strong><\/span> Adding Filtration can make your Panel or MCC much larger and more expensive than it needs to be.<\/p>\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t \n\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t \n\t\t\t\t\t\t\t\t\t SHRINKING THE VFD PANEL FOOTPRINT:<\/strong> ELIMINATE THE NEED FOR EXTERNAL FILTERS<\/p>\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t \n\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t \n\t\t\t\t\t\t \n\t\t\t\t\t \n\t\t\t \n\t\t\t\t\t\t\t<\/div>\n\t\t<\/div>\n\t\t\t\t \n\t\t\t \n\t\t\t\t\t\t \n\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t \n\t\t\t\t\t\t\t\t\t A TRUE SINE WAVE IS DRAWN FROM THE GRID<\/strong> A TRUE SINE WAVE IS GIVEN TO THE MOTOR<\/strong><\/p>\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t\t<\/div>\n\t\t<\/div>\n\t\t\t\t \n\t\t\t \n\t\t\t\t\t\t\t<\/div>\n\t\t<\/div>\n\t\t\t\t\t<\/div>\n\t\t<\/section>\n\t\t\t\t \n\t\t\t\t\t\t\t\t\t This upgrade in technology means we can do the following:<\/p> Keep healthy old motors and cables in place.<\/li> Allow unlimited cable lengths to the motors.<\/li> Eliminate the need for insulated bearings and shaft grounding.<\/li> Eliminate the need for VFD duty motor insulation and cables.<\/li> An Active Front End meets IEEE-519 low harmonic requirements & enables \u201cGreen\u201dregeneration.<\/li><\/ul> SmartD is a Canadian Company. Main Manufacturing and Engineering is in Montreal. Mass production for large projects can be done with our Malaysian facility.<\/p> https:\/\/primelines-hvac.com\/2025\/03\/tecnicas-y-sistemas-de-refrigeracion-en-centros-de-datos\/<\/a><\/li> https:\/\/smartd.tech\/your-benefits\/energy-efficiency\/<\/a><\/li> https:\/\/api.sprecherschuh.com\/ecatalog\/get\/Other\/hp-volts-fla_charts.pdf<\/a><\/li> https:\/\/www.greenheck.com\/resources\/blog\/overspeeding-and-underspeeding-fan-motors<\/a><\/li> https:\/\/www.se.com\/ca\/en\/product\/ATV630D30S6\/variable-speed-drive-altivar-process-atv600-atv630-40hp-600vip20\/<\/a><\/li> https:\/\/www.reddit.com\/r\/ElectricalEngineering\/comments\/ihg7uz\/is_it_okay_to_run_3phase_motor_rated_for_60hz_at\/<\/a><\/li> http:\/\/www.50hz60hz.com\/60hz-motor-running-on-50hz-power-supply.html<\/a><\/li> https:\/\/www.variablefrequencydrive.net\/variable-frequency-drive-for-fans.html<\/a><\/li><\/ol>\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t\t<\/div>\n\t\t<\/div>\n\t\t\t\t\t<\/div>\n\t\t<\/section>\n\t\t\t\t<\/div>\n\t\t","protected":false},"excerpt":{"rendered":" Using a 40HP 600V Fan or Centrifugal Pump Application Switching a 40HP, 600V fan from a Direct-On-Line (DOL) starter to a Variable Sine Wave Drive (VFS \u2013 the latest advancement in VFD Technology): Running at 55Hz instead of 60Hz typically produces substantial cost savings on the monthly electrical charges due to the affinity law for […]<\/p>\n","protected":false},"author":18,"featured_media":0,"comment_status":"closed","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"_acf_changed":false,"inline_featured_image":false,"footnotes":""},"categories":[267],"tags":[],"class_list":["post-22911","post","type-post","status-publish","format-standard","hentry","category-performances"],"acf":[],"_links":{"self":[{"href":"https:\/\/smartd.tech\/fr\/wp-json\/wp\/v2\/posts\/22911","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/smartd.tech\/fr\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/smartd.tech\/fr\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/smartd.tech\/fr\/wp-json\/wp\/v2\/users\/18"}],"replies":[{"embeddable":true,"href":"https:\/\/smartd.tech\/fr\/wp-json\/wp\/v2\/comments?post=22911"}],"version-history":[{"count":0,"href":"https:\/\/smartd.tech\/fr\/wp-json\/wp\/v2\/posts\/22911\/revisions"}],"wp:attachment":[{"href":"https:\/\/smartd.tech\/fr\/wp-json\/wp\/v2\/media?parent=22911"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/smartd.tech\/fr\/wp-json\/wp\/v2\/categories?post=22911"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/smartd.tech\/fr\/wp-json\/wp\/v2\/tags?post=22911"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}