3. Your friend's car battery is dead and he calls you to come give him a boost. On the drive over, you think about the electrical circuit required to jump start a car. See the figure below with two identical cars: one has a charged battery with an EMF of 13 V that delivers a maximum current of 433 A (when the battery terminals are short circuited) and the other has a dead battery with an EMF of 12 V that delivers a maximum current of 120 A (when the battery terminals are short circuited). starter ww key in ignition charged battery jumper cables dead battery jumper cables ww key in ignition starter a. What are the internal resistances of the charged battery and the dead battery? b. What is the resistance of the engine starter in the car with the charged battery if it draws 100 A when the key is turned in the ignition? mm c. How much current is drawn by the starter in the car with the dead battery? If it requires 100 A to start the engine, does it draw enough current? d. In order to jump start the car with the dead battery, the charged battery is hooked up in parallel with the dead battery using jumper cables. What is the charging current into the dead battery (without turning the key in the ignition)? e. What would the charging current be if you hooked up your jumper cables backwards, such that the batteries were in series? What do you think might physically happen? f. If the batteries are hooked up in parallel, and the key is turned in the ignition of the car with the dead battery, find the current through the starter and through each battery.

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Protection System

A system that protects electrical systems from faults by isolating the problematic part from the remainder of the system, preventing power from being cut from healthy elements, improving system dependability and efficiency is the protection system. Protection devices are the equipment that are utilized to implement the protection system.

Predictive Maintenance System

Predictive maintenance technologies are designed to assist in determining the state of in-service equipment so that maintenance can be scheduled. Predictive maintenance is the application of information; proactive maintenance approaches examine the condition of equipment and anticipate when it should maintain. The purpose of predictive maintenance is to forecast when equipment will fail (depending on a variety of parameters), then prevent the failure through routine and corrective maintenance.Condition monitoring is the continual monitoring of machines during process conditions to maintain optimal machine use, which is necessary for predictive maintenance. There are three types of condition monitoring: online, periodic, and remote. Finally, remote condition monitoring allows the equipment observed from a small place and data supplied for analysis.

Preventive Maintenance System

To maintain the equipment and materials on a regular basis in order to maintain those running conditions and reduce unnecessary shutdowns due to unexpected equipment failure is called Preventive Maintenance (PM).