12.07.2015 Views

power distribution - Siemens

power distribution - Siemens

power distribution - Siemens

SHOW MORE
SHOW LESS
  • No tags were found...

Create successful ePaper yourself

Turn your PDF publications into a flip-book with our unique Google optimized e-Paper software.

18SPEEDFAX TM 2007-2008 TechnicalContents<strong>Siemens</strong> Design Assistant Disc 18-2Types of Power Distribution Systems 18-3 – 18-5Ground Fault Protection 18-6 – 18-12Overcurrent Protection and Coordination 18-13System Analysis 18-14Current Limiting Circuit Breaker Technology 18-15Series-Connected Combination Ratings 18-16Harmonics / K-factor Ratings 18-17 – 18-18Table 1:Ampacities of Insulated Conductors 18-19Table 2:Correction Factors for Ambient Temperatures 18-19Table 4A:Motor Full-Load Currents ofThree Phase AC Induction Type Motors 18-20Table 4B:Motor Full-Load Currents in Amperes,Single Phase AC 18-20Table 4C:Motor Full-Load Currents in Amperes, DC 18-20Table 4D:Conversion Table of Polyphase Design 18-20Table 5:Normal-Load and Fault Currents ofThree Phase Transformers 18-20Table 6:Electrical Formulas for Finding Amperes,Horse<strong>power</strong> Kilowatts, and kVA 18-21Table 7:Grounding Electrode Conductor forAC Systems 18-21Table 8:Minimum Size Grounding Conductors forGrounding Raceways and Equipment 18-21Molded Case Circuit Breakers 18-22 – 18-24Conversion Table 18-2518 TECHNICALResidential Commercial Industrial

Hooray! Your file is uploaded and ready to be published.

Saved successfully!

Ooh no, something went wrong!