Select all the basic methods of wiring electrical circuits. Transformer repass wiring PLC wiring Direct hard-wiring Remote wiring Hard-wiring using terminal strips 

Electromechanical energy conversion

What is the purpose of the lead strip at the bottom of the power transformer. Can explain the th right purpose.

If required, what type of diagram must indicate the calculated load, demand factors, conductor type and size, and area served? A. A transformer configuration B. A branch circuit mapC. An installation planD. A feeder diagram

12. If overcurrent protection is provided in the transformer of a separately derived system, which of the following statements is correct?A. A ground electrode must be present at the transformer and the building's disconnect.B. There's no need for service equipment or a panelboard in the separate building.C. An equipment grounding conductor must be run with the conductors between the transformer and the building's disconnect.D. The neutral should be bonded to the equipment grounding conductor at the service equipment in the separate building.

2. What type of potential transformer would you use for a 362-kV grounded-neutral metering application on an interconnection system? A. Bar-type B. Cascade-type C. Window-type D. Phase-shift-type

5.a. The aging of transformer insulationA. increases as the temperature increases.B. does not affect the transformer life.C. is not affected by the temperature.D. decreases as the temperature increases.5.b. Excessive power-transformer noise at the start of operation is most likely caused byA. an open feeder switch.B. a loose brace.C. a defective radiator.D. an open load fuse.

Two different transformers details are tabulated below. Calculate the missed values in the table. Secondary terminal voltage of the second transformer is 487.5V when loaded. Determine the regulation of the transformer.?

I need to solve the exams correctly and explain each point.

When 2200 volts, 60 Hz is impressed on a certain transformer, the core loss is 240 Watts. When the frequency of the impressed voltage is changed to 25 Hz and the voltage is reduced to maintain the same flux density as before, the core loss falls to 75 Watts. Neglect impedance drop. What is the hysteresis loss at 60 Hz?