Resistive Load Resistive loads can be purely resistive or of the tungsten-heater load type. A resistive load that has no heating element is the easiest for a switch to handle, and the switch’s rating is based on this type of load. A resistive load is one in which 100% of the load is composed of […]
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A structural design project may be divided into three phases, i.e. planning, design and construction. Planning: This phase involves consideration of the various requirements and factors affecting the general layout and dimensions of the structure and results in the choice of one or perhaps several alternative types of structure, which offer the best general solution.
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The Hipot Test (Dielectric Voltage Withstand) The Hipot test is the most common type of safety test. This test is designed to stress a product’s insulation beyond what it would encounter during normal use. The reasoning behind this test is that if the insulation can withstand high voltage for short period of time, it will
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There are several types of the electronic circuitry used within battery chargers for the marine market. FERRO-RESONANT (or CVT) These use a low-frequency MAGNETIC control system, which makes them very HEAVY, very BULKY and is also only available with a poor FLOAT charge characteristic, therefore very SLOW recharging. They can also generate a large magnetic
The LC and RC oscillators have their own limitations. The major problem in such circuits is that their operating frequency does not remain strictly constant. There are two principal reasons for it viz., As the circuit operates, it will warm up. Consequently, the values of resistors and inductors, which are the frequency determining factors in
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An electronic device that generates sinusoidal oscillations of desired frequency is known as a sinusoidal oscillator. Oscillator does not create energy, but merely acts as an energy converter. It receives DC energy and changes it into AC energy of desired frequency. The frequency of oscillations depends upon the constants of the device. Although an alternator
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A weld joint refers to how the parts to be joined are assembled prior to welding. There are five basic types of joints used in welding which are Butt, Lap, Corner, T & Edge. The metal to be joined is called the base metal. If the part to be welded is not metal, it is
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Steel lattice towers are also used in electronic and communication industries for communication of microwave signals through different types of antennas. Several antennae are fixed on the tower in different directions at different heights as per the requirement and usage. The antenna positions decide the height of the tower. Symmetrical cross sections are preferred for
For optimization of transmission line towers, it is important to know various design parameters that control the design of the tower. Some of the parameters that dictate the configuration of the transmission line towers are briefly described below: TOWER HEIGHT: The height of the tower is determined by parameters such as number of cross arms,
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POOR TRANSMISSION EFFICIENCY Losses in all power system elements from the power station generator to the utilization devices increase due to reactive power drawn by the loads, thereby reducing transmission efficiency. POOR VOLTAGE REGULATION Due to the reactive power flow in the lines, the voltage drop in the lines increases due to which low voltage
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