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The plant is comprised of two identical modules. The response to each of these problems will be needed in order to complete the subsequent chapters. The first task will be to identify the electrical loads from an equipment list which has been given to the engineer by the plant. From this list, indicate which loads require electric power and from which group you would expect to receive the information. For example: A—Architectural M—Mechanical H—Heating and Ventilating Equipment List—Module #1 Note: Module #2 is identical.

Are located on a local panel. Assume 100 elementary lines per diagram. Allow 2 spaces between each scheme. Answer Estimating elementary and control schemes is a very difficult task. Usually at the beginning of the project it is difficult to get an exact description of the control. Assume stop-start scheme with two lines per scheme; thus 28 × 2 = 56 lines. Assume 2 spaces between each motor. Scheme: 28 × 2 = 56 lines Assume 2 lines per each solenoid scheme, 28 × 2 = 56 lines Since more than 100 lines are required, two diagrams are estimated.

Low Peak DualElement Fuses Similar to dual-element fuses, these fuses are considerably more current-limiting in the short circuit region. Limiters These fuses provide only short circuit current-limiting protection and are not designed to provide overload protection. Semiconductor Fuses These special fuses have an extremely high degree of current limitation and are used to protect power superconductors. ———————————————————————————————— Figure 3-2f. Typical Fuse Types SIM 3-4 Indicate the fuse and switch sizes for the following: 3, 10, 50, 75 HP motors.

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