Open Circuit (No Load) and Short Circuit (On-Load) Test of a Transformer As we have seen in the equivalent circuit of transformer, there are four main parameters; Equivalent resistance (R01) Equivalent reactance (X01) Core-loss resistance (R0) Magnetizing reactance (X0) The open circuit a

Sumpner’s Test or Back-To-Back Test on Transformer for Efficiency, Voltage Regulation, & Heating Effect The open-circuit test and short circuit test are performed to determine the equivalent circuit parameter. With the help of these tests, we cannot find the temperature rise in a

What is Scott Connection or Scott-T Transformer? Scot Connection Scott connection is a type of connection of transformer that used to get two-phase power supply from three-phase source or vice-versa. The Scott connection is also known as Scott-T Transformer. This method of transformer conn

Measurement of Frequency with a Digital Multimeter Frequency is the number of cycles completed in one second of time. There are different kinds of multimeters that can measure frequency. Alternating current and other electrical signals possess frequency that affects the operation of a devic

Measurement of Capacitance with a Digital Multimeter To accurately measure the capacitance of a capacitor, you require expensive instruments such as an LCR meter which can measure Inductance (L), Capacitance (C) and resistance (R) accurately while keeping various parameters such as frequenc

What is Multimeter? Types, Functions Working and Applications Electrical and electronics engineering students, engineers and technicians use various kinds of measurement devices to check various electrical quantities in a circuit such as voltage, current, continuity, power etc and check and

Sizing Load Center, Panelboards, Distribution Board & Consumer Unit According to NEC and IEC? Planning is the first and key priority for all electrical wiring projects and a proper estimation and analysis based on accurate calculation is must while designing and installation of a distri

How to Find the Number of Circuit Breakers in a Load Center & Distribution Board Based on the Calculated Load for Home? In the USA and Canada, the common supply voltage to the residential buildings and homes is 120V & 240V based on the NEC and CEC. This single phase supply (actually

Sizing the Suitable Capacity of a Subpanel or Main Lug A subpanel or main lug (aka Remote Panel in NEC) is a smaller service panel installed downstream from the main breaker box or load center in the home. Generally, the subpanel is needed to be installed in a separate section of premises e

How Many Outlets Can You Put on a Single Circuit Breaker? – NEC & IEC The most frequently asked and searched question from home owners and DIY dudes is what is the exact number of outlets, receptacles and sockets which can be installed on 15A or 20A circuit breakers. While electri

How Many Lights Can You Put on a Single Circuit Breaker? – NEC & IEC Another basic query about the lighting points and fixtures on sub circuits and breakers we receive the most from the readers. We got multiple queries like, how many lights can I put on a 15A circuit breaker? What

How Much Watts Inverter Do You Need for Home Appliances? Solved Example A power inverter is a device which converts DC supply to the AC supply. While most of the household appliances are designed to operate on AC supply (120V or 240V in US and 230V in UK & EU), that’s why we need

Running a 3-Φ Induction Motor on a 1-Phase Supply – 3 Methods According to the type of AC power supply, induction motors are classified into two types; three-phase induction motor and single-phase induction motor. In most industrial and agriculture applications, a three-phase inductio

Analyzing & Solving Electric Circuits Using Substitution Theorem Substitution Theorem As the name suggests, a substitution theorem is used to replace one element of the circuit with another element. But while replacing the element, you must keep in mind that the behavior of the circuit

Proof, Explanation, Experiment and Solved Examples of Compensation Theorem for Circuit Analysis Compensation Theorem Sime times in network theory, it is important to know or study the effect of change in impedance in one of its branches. It will affect the corresponding voltage and current

Measuring of AC and DC Current with a Multimeter? (DMM + Analog) Just like voltage, current measurement is also necessary for troubleshooting any circuit. It is used to check if a certain circuit or load is operating properly or is it drawing too much current. A multimeter (also known as AV

Measurement of AC and DC Voltage with a Multimeter – (DMM + Analog) Voltage measurement is one of the most simple and easy tasks to do with a DMM (digital multimeter) or analog multimeter meter. Voltage measurement is done in order to troubleshoot or analyze a circuit. it is one of th

Measuring Resistance with a Multimeter? (DMM – Analog Meter) Measuring resistance just like voltage and current is an important part of troubleshooting any component. It tells the condition of the components. The resistance measurement is also used to check for open or closed circuits. Last

Measurement of Electric Power with a Multimeter? (DMM – Analog Meter) A multimeter is a very essential tool for electrical and electronics engineers, technicians, electricians, students and hobbyists. It can measure multiple quantities such as voltage, current, resistance, capacitance, freq

Current Division “CDR” for for Resistive, Inductive and Capacitive Circuits What is Current Divider Rule (CDR)? When a number of elements are connected in parallel, the current divides into a number of parallel paths. And the voltage is the same for all elements which are equal