AM.I.A.K16

From the FAA library

• Aviation Maintenance Technician Handbook - Generalp. 12-67
  Chapter 12: Fundamentals of Electricity & Electronics › Apparent Power Defined › Current Transformers

  Current transformers are used in AC power supply systems to sense generator line current and to provide a current, proportional to the line current, for circuit protection and control devices. The current transformer is a ring-type transformer using ... current in the primary induces a current in the secondary by magnetic induction. The sides of all current transformers are marked “H1” and “H2” on the unit base. The transformers must be installed with the “H1” side toward the generator…

• Aviation Maintenance Technician Handbook - Generalp. 12-65
  Chapter 12: Fundamentals of Electricity & Electronics › Apparent Power Defined

  primary and secondary of this closed core transformer are wound on a closed core to obtain maximum inductive effect between the two coils. There are two classes of transformers: voltage transformers, used for stepping up or stepping down voltages ... current transformers used in instrument circuits. In voltage transformers, the primary coils are connected in parallel across the supply voltage. [Figure 12-143A] The primary windings of current transformers are connected in series in the primary circuit. [Figure…

• Aviation Maintenance Technician Handbook - Generalp. 12-67
  Chapter 12: Fundamentals of Electricity & Electronics › Apparent Power Defined › Power in Transformers

  Power in Transformers Since a transformer does not add any electricity to the circuit but merely changes or transforms the electricity that already exists in the circuit from one voltage to another, the total amount of energy in a circuit ... must remain the same. If it were possible to construct a perfect transformer, there would be no loss of power in it; power would be transferred undiminished from one voltage to another. Since power is the product of volts times…