A nickel-cadmium cell has two plates. The active material of the positive plate (anode) is Ni(OH)4 and the negative plate (cathode) is of cadmium (Cd) when fully charged. The electrolyte is a solution of potassium hydroxide (KOH) with a small addition of lithium hydrate which increases the capacity and life of the battery. The specific […]
Hi friends, In this article, I am going to discuss the nickel iron battery construction, working principle, and compare its features with a lead-acid battery. So keep reading. The Nickel-Iron alkaline cell was developed by an American scientist Thomson A. Edison in 1909. Therefore it is also known as Edison-cell. Nickel Iron Battery Construction The nickel-iron battery
Nickel Iron Battery Construction & Working Principle Read More »
Methods of Electrical Wiring Testing All new completed electrical installation should be tested before connection to the supply, to ensure that the installation is technically sound and free from any possible short circuits, etc. the main reasons, to test a new electrical installation or house wiring before it is switched on to the mains are
Hi friends, In this article, I am discussing the stepper motor working principle, its basics and applications. You will find it informative and interesting. So keep reading. As the name implies, a stepper motor, within its operation range, and capability, starts, stops, reverses and moves through a predetermined stepping angle under commands from an electronic logic
Hi friends, In this article, I am discussing the radar working principle, block diagram and applications. So keep reading. A radar which stands for “radio detection and ranging” is a method of detecting the presence and position of objects by reflected radio waves. The detected object is called target and the distance to the target is determined
Hi friends, In this article, I am providing you some basic information about the industrial applications of ultrasonic waves. So keep reading. The term ultrasonic is used in acoustics to denote the frequencies which are beyond the range of human hearing. Thus; ultrasonic waves are sound waves of frequencies above 20,000 c/s. By using modern methods of generation,
High resistivity materials are used for making resistance elements for heating devices, starters for electric motors, resistances used in precision measuring instruments, loading resistances and rheostats and filaments for incandescent lamps. High resistivity materials are used in all such applications where a large value of resistance is required. If low resistivity materials were used for such
Single Phasing of Induction Motor The single phasing of three phase induction motors forms the most common hazard to motor operation, because of the possibility of overheating and burning-out of the motor under this condition. By single-phasing is meant the opening of one wire (or leg) of a three-phase circuit whereupon the remaining leg at
Transformer absorbs moisture sometimes which is very harmful to its health. Presence of moisture can be detected by two following tests: Checking Insulation Resistance of Winding: Insulation resistance of winding should be checked with a 1000 V megger, the voltage should be applied for one minute. All the windings except the winding under test should
The transformer oil or insulating oil is used in transformers as well as some electrical equipment to: This oil should be clean, free from moisture and other harmful contaminants and possess the following characteristics: Dielectric strength (one minute)- 40 KV (RMS) with a 4 mm gap.Viscosity at 27oC in centistokes-max.– 27Pour point-max. – minus 10oC.Flash point-min.