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Power stations generate electric power. Electrical power transmission lines transmit the generated power to far places. The resistance and reactance of the line cause a voltage drop in the power. The Voltage Regulation of Transmission Line is the change in voltage between the sending and receiving ends. What is Voltage Regulation? We express the Voltage … Read more
What is Insulation Resistance? Insulation resistance measures how well an insulating material stops leakage current. We measure this blocking ability in Ohms (Ω). Furthermore, good insulation has very high resistance. In contrast, poor insulation allows current to leak. Obviously, this leakage can cause electric shocks, equipment damage, and fire hazards. Basic Formula of Insulation Resistance … Read more
Let us try to understand why transmission of electricity requires a high-voltage transmission system. This is essential before discussing the details of an electrical transmission system, Requirement of Electrical Transmission System All the generating stations generate electric power at a low voltage level. Because generating electrical power at a low voltage level is economical. Actually, … Read more
A wire wound resistor consists of a winding of resistive wire wrapped around a non-conductive cylinder. This is the oldest type of resistor. Although we use wire wound resistors these days. Because these resistors provide high accuracy, better stability. Also, they can handle much more power than other types of resistors available for fixed resistor … Read more
What is a Carbon Composition Resistor? A carbon composition resistor is a simple electronic component. Engineers use it to control current flow in circuits. This resistor contains carbon particles mixed with clay material. Construction and Manufacturing Manufacturers follow a simple process to make these resistors. First, they mix fine carbon powder with ceramic clay. The … Read more
Let us discuss the effect of temperature on resistance. When the temperature of a conductor increases, its resistance also increases. This relation is linear. In other words, the change in resistance is directly proportional to the change in temperature. Mathematical Relationship If R1 is the initial resistance of a particular resistor or conductor at T1 … Read more
An Oil Surge Relay, or OSR, is a type of mechanical relay. It operates in response to a sudden oil surge. Need for Separate Diverter Tank Every modern power transformer includes an On-Load Tap Changer (OLTC). During tap-changing operations, some arcing always occurs at the diverter switch contacts. It is desirable to change tap positions … Read more
The Buchholz Relay is a gas-actuated protection relay. It is a mechanical relay. All oil-immersed transformers that have a conservator tank should be equipped with a Buchholz relay. A Buchholz relay can detect both slow-developing faults and major transient faults occurring within the transformer. It provides an early warning (alarm) for slow-developing faults and initiates … Read more
In this article, we are going to discuss the theory behind a condenser bushing. We have mainly focused on how the capacitor grading improves the voltage distribution along the thickness of the insulation. We also call it a capacitor graded bushing. There are mainly two types of condenser bushings. These are the OIP bushing and … Read more
We also refer to a resin-bonded paper bushing or a synthetic resin-bonded paper bushing, respectively, as SRBP or RBP bushings, in short form. Before entering the actual discussion of resin-bonded paper bushings, let us understand the meaning of resin-bonded paper. What is the meaning of resin-bonded? We all know that paper is a cellulose material, … Read more