Delta to Wye

Related BrainMass Solutions

• RMS and Line-to-Line Voltages

  Three-phases electrical systems have two kind of connections, one is wye connection, the other one is delta connection.

• Electrical Service

  Solution: a) This is known as the star-delta (or Wye - Delta) starter. This is one of the direct on line (DOL), reduced voltage starting methods.

• Electrical Energy Conversion: Synchronous Generator

  - E(delta) is the induced voltage at the air-gap or known as excitation voltage.

• Induction motor typical calculation.

  Electrical power system connections: Wye connection: Delta connection: The line-to-line voltages of the equipment will always be seen from the system point of view.

• Calculate the delay angle (alpha)

  The average output voltage is proportional to the Cosine of the delay angle.

• Auto-ionization of Water

  29738 Auto-ionization of Water Kw for the auto-ionization of water, H2o(l) -> H positive(aq) + OH negative (aq) is 1.0 x 10 to the negative 14. Calculate deltaGdegree,DeltaSdegree and DeltaHdegree for the reaction at 25 degree C?

• The relationship between delta S and G

  Delta H < 0 and delta S < 0 e. Not enough information provided to answer question The melting of ice is a spontaneous process so delta S will always be positive. That's why for a spontaneous process Gibbs free energy will be negative.

• Calculating Delta H

  : In order to obtain the reaction above, we need to have the following operation: H2O+ClO- --> Cl- +H2O2 , (I), delta H=6.5 kJ/mol H2O2+2NH3 -->N2H4+2H2O, (II), delta H=-63.9*2=-127.8 kJ/mol NH3 +H2O ---> NH4+ + OH-, (III), delta H=3.6 kJ/

• Thermodynamic variables for a two level system

  This means that: Z = Exp(0) + Exp(-beta delta) = 1 + exp(-beta delta) (1) The probability for the system to be in the state with energy 0 is: P(0) = Exp(0)/[1 + exp(-beta delta)] The probability for the system to be in the state