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tandard Drives Saving energy with innovative electric drives

tandard Drives Saving energy with innovative electric drives. S. We reserve the right to make technical changes!. Contents. 1 (CEMEP - EU) - Background EPACT – Main Objectives Comparison of EPACT / CEMEP Measures EPACT/ CEMEP – Motors not covered Measures

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tandard Drives Saving energy with innovative electric drives

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  1. tandard DrivesSaving energy with innovative electric drives S We reserve the right to make technical changes!

  2. Contents • 1 (CEMEP - EU) - Background • EPACT – Main Objectives • Comparison of EPACT / CEMEP Measures • EPACT/ CEMEP – Motors not covered • Measures • Motor selection of efficiency • Saving energy by optimising the system • Profiting from Energy-Saving Potential • Checklist for EFF2 and EFF1 motors • Mechanical efficiency • Siemens Motor Sources

  3. EU CEMEP Background Background - Introduction of efficiency classesacc. to CEMEP - EU • After the example set by the USA with the EPACT law, the EU is now taking the initiative in co-operation with CEMEP1) to implement measures for improving the efficiency levels of electrical drives. Motive: Reduction of the emission of CO2. • CEMEP prescribes efficiency classification for 2-pole and 4-pole motors in the power range from 1.1 to 90 kW. Efficiency is subdivided into three classes so that 2 characteristic curves define the three classes: – "eff1" (High-efficiency motors)– "eff2" (Improved-efficiency motors)– "eff3" (Standard motors)1) CEMEP = European Committee of Manufacturers of Electrical Machines and Power Electronics; Efficiency determined as before according to EN 60034-2

  4. Voluntary Agreement (EU) Main motives for efficiency classification The main objectives of the motor manufacturers are: • Increase in customer benefits by achieving savings in energy costs • Market transparency for customers and users • Facilitation of motor selection for the user (Source: ZVEI brochure) : Electrical Drives: Cost savings instead of regulation

  5. Comparison of EPACT / CEMEP Law/ Voluntary commitment EPACT - USA CEMEP - Europe Voluntary undertaking to – classify efficiency – drastically reduce EFF3 motors Legally prescribed minimum efficiency Status 2-, 4- and 6-pole 60 Hzsquirrel-cage motors1 to 200HP (0.75 to150kW) 2- and 4-pole 50 Hz squirrel- cage motors1.1 to 90 kW Motors covered Efficiency determined acc.to Individual-loss procedure in acc. with IEC 60034-2 IEEE 112 B Nominal value N acc. to NEMA MG1 Tolerance in acc. with IEC 60034-1 Efficiency ( Tol.) – Efficiency class on rating plate of motor – N, 3/4 load and efficiency class in documentation Rating plate with Efficiency (N) and CC032A Marking required

  6. Comparison of EPACT / CEMEP Motors not covered EPACT - USA CEMEP - Europe – Motors < 1.1 kW and > 90 kW – Motors > 4-pole – Voltages and frequencies different to 400 and 525 V 50Hz – Special motors/constructions – Pole-changing motors – Brake motors, single-phase motors – Variable-speed drives – Force - cooled motors – Integrated geared motors – Intermittent operation – Special environmental conditions – Ex motors – Hollow-shaft motors – Motors <1 HP and > 200 HP – Motors > 6-pole – Voltages and frequencies different to 230V, 460 V/ 60 Hz – Motors with flange – Special motors/ constructions – Pole-changing motors – Brake motors, single-phase motors – Variable-speed drives – Force-cooled motors – Geared motors – Intermittent operation – Partially and completely overhauled motors – NEMA - design C and D (i.e. MA > MK)

  7. EPACTRating plate – Frenstat Efficiency class (CEMEP) Only when ordered as design UL (Option D31) 60 Hz (EPACT) 50 Hz (CEMEP)

  8. MeasuresSiemens and CEMEP, 4- pole

  9. MeasuresComparison of active components EFF1 - Stator EFF1 - Rotor EFF2 - Stator EFF2 - Rotor

  10. Measures Reducing individual losses INPUT Active power from mains Winding resistance reduced due to larger wire cross-section Winding resistance reduced due to larger rotor slots (section geometry) Better quality of laminations used Reduced magnetic stress Larger core assembly Stator P Fe1 ~ K Fe * B2 B2 ~ 1/ m2Fe P CU1 ~ I12 * R1 Rotor Improved bearings and fans P CU2 ~ I2‘2 * R2‘ PR OUTPUT Mechanical output Efficiency increase due to better use of active materials

  11. Voluntary Agreement (EU Project) Facilitation of motor selection [%] EU-efficiency classes for motors: High-efficiency Improved- efficiency Standard Trend The consequence: Siemens already stopped producing EFF3-standard-motors and just produces the energy-saving motors EFF1 and EFF2 instead Subdivision into three efficiency classes according to the EU/CEMEP-agreement [kW]

  12. 160% 158% 152% 142% 100% Saving energy by optimising the systemExample: turbo machine drive Flow control by throttle Flow control by rotational speed Power input Power input 285% Losses in: Losses in: Transformer Transformer 281% M ~ Motor ~ Inverter 265% M Pump Motor 160% Throttle valve X Pump 100% Effective output Effective output

  13. Profiting from the energy-saving potentialChecklist for choosing drives efficiently • Always control the energy saving balance. • The purchase of a frequency converter for automatic speed control will often be amortised shortly by saving energy. • From 2000 operating hours per year on, energy-saving motors EFF1 generally are the more economic alternative. • For short operating times (e.g. actuator) energy-saving motors EFF2 are sufficient. • By exchanging existing motors into energy-saving motors, the energy-costs decrease. • If the motor needs to be repaired, check, if it is more economical to buy a new energy-saving motor.

  14. Efficiency Comparison at 100% and 75% of Rated Power

  15. Customer Benefits • ENERGY SAVING • Example: • 1500kW, 2 pole, 6600V Motor (actual info) • Siemens eff. 97.2% Comp. Eff. 95% • Running time: 24 hours per day, 365 days per Year • Energy cost: R0,2 per kWh • Saving with an improved efficiency • R62 612 pa

  16. Source of Supply - Imported • Czech Republic, Mohelnice Factory • From 2.2 kW to 18,5 kW ( CI and Al type ) • 100 to 160 Frame size • 2 to 8 pole • 400V to 690 • Statistics • 1,91 million motors manufactured annually • 1800 employees • ISO 9001 and ISO 14000

  17. Source of Supply - Imported • Czech Republic, Frenstadt Factory • From 22 kW to 250 kW • 180 to 315 Frame size • 2 to 8 pole • 400V to 690V • Statistics • 95 000 motors manufactured annually • 800 employees • ISO 9001 and ISO 14001

  18. of AC Motors acc. IEC and ANEMA Series 1R.5/S.5 IEC H-modyn IEC, ANEMA H-compact PLUS IEC, ANEMA N-compact IEC H-compact IEC 200 - 3000 kW 2 - 11 kV 2 - 12 pole Squirrel cage Cast iron housing with cooling ribs IP55 200 - 1000 kW 400 - 690 V 2 - 8 pole Squirrel cage Cast iron housing with cooling ribs IP23, IP55 1000 - 7000 kW 1340 – 9390 HP 3.3 - 13.2 kV 2 - 12 pole Squirrel cage Cast iron-/ Steel housing, cooler assembly IP23, IP55, WP II 7000 - 10000 kW 3.3 - 13.2 kV 4 - 24 pole Squirrel cage slip ring rotor Synchronous Cast iron-/ Steel housing, cooler assembly IP55, WP II 7000 - 50000 kW 9390 – 67000HP 6 - 13.2 kV 2 - 12 pole Squirrel cage Synchronous Base frame, Water cooling IP55, WP II Cast iron housing with cooling ribs ANEMA Special motors 2000 - 65000 kW 690 V - 13.2 kV Squirrel cage synchronous Example: Motor for main cooling pump ANEMA 150 - 1340 HP 460 – 575 V 2 - 8 pole Squirrel cage Cast iron housing with cooling ribs IP55/TEFC ODP, WP I, WP II, TEAAC/TEWAC (MV-motors with LV-winding) 150 - 2500 HP 0.2 – 11 kV 2 - 16 pole Squirrel cage Cast iron housing with cooling ribs IP55/TEFC ANEMA 200 - 10000 HP 0.2 - 13.8 kV 2 - 16 pole Squirrel cage Cast iron housing cooler assembly ODP, WP I, WP II, TEAAC/TEWAC

  19. The Cost Saving Motor from Siemens Thank You

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