Maintenance of your automotive is not complete if you do not conduct regular checks on your car battery. If your car battery is not maintenance free, then you need to add a battery hydrometer or refractometer in your tool box. Either of the instruments is useful for checking the health on battery and ensuring that your power house serves you for the longest time
Electrical circuit breaker is a switching device which can be operated manually as well as automatically for controlling and protection of electrical power system respectively. As the modern power system deals with huge currents, the spacial attention should be given during designing of circuit breaker to safe interruption of arc produced during the operation of circuit breaker. This was the basic definition of circuit breaker.