Basic Switches

Basic Switches

  1. The wires between switches are called Travellers
  2. 3-Way switches are SPDT
  3. 4-Way switches are DPDT
  4. Additional switches can be added by more 4-Way switches
  5. A 3-Way circuit has 2 switches - 2 SPDT
  6. A 4-Way circuit has 3 switches - 2 SPDT and 1 DPDT
  7. A 99-Way circuit has 98 switches - 2 SPDT and 96 DPDT

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CSR Motor

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CSR Motor Definition and Characteristics CSR means Capacitor Start Capacitor Run (CSCR), typically shortened to CSR High starting torque Can handle high-demand loads 1-10 HP Can be designed for lower full-load currents and higher efficiency Operates at lower temperature than other single-phase motor types of comparable horsepower Only disadvantage to a CSR motor is its higher price - mostly the result of more capacitors, plus a starting switch Able to handle applications too demanding for any other kind of single-phase motor A CSR motor uses a potential relay or start relay (see Discussion below) Discussion Potential or "voltage" starting relays are used with single-phase capacitor-start/capacitor-run motors, which need relatively high starting torque. Their main function is to assist in starting the motor. These starting relays consist of a high-resistance coil and a set of normally closed contacts. The coil is wired between terminals 2 and 5, with the con...
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Electrical Control Circuit Schematic Diagram of Permanent Split Capacitor Motor

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Electrical Control Circuit Schematic Diagram of Permanent Split Capacitor Motor PERMANENT SPLIT  CAPACITOR  MOTOR Figure 1: A permanent-split capacitor-run motor with the capacitor mounted on the motor Figure 2: An externally reversible permanent-split capacitor motor. To reverse, interchange   leads  T5 and T8 Figure 3: A two-voltage permanent-split capacitor motor connected for 115 volt operation Figure 4: A single-value three-lead reversible permanent-split capacitor motor Figure 5: A two-speed single-value capacitor-run motor Figure 6: A  schematic diagram  of a three-speed single-voltage capacitor-run motor
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Electric Motor Theory

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Introduction It has been said that if the Ancient Romans, with their advanced civilization and knowledge of the sciences, had been able to develop a steam motor, the course of history would have been much different. The development of the electric motor in modern times has indicated the truth in this theory. The development of the electric motor has given us the most efficient and effective means to do work known to man. Because of the electric motor we have been able to greatly reduce the painstaking toil of man's survival and have been able to build a civilization which is now reaching to the stars. The electric motor is a simple device in principle. It converts electric energy into mechanical energy. Over the years, electric motors have changed substantially in design, however the basic principles have remained the same. The phenomena of magnetism, AC current and basic motor operation will be covered.  Magnetism A permanent magnet will attract and hold metal objects ...
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