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Motor stalling is a condition in which a motor stops rotating even when there is sufficient voltage at its terminals. This condition occurs when the torque required by the load is more than the maximum torque (Breakdown torque) that can be generated by the motor. At this condition, the motor drains the maximum current and … Read more
Here is a simple kW to HP converter and steps to unit conversion. Kilowatt and horsepower are units of power. Power is nothing but the energy converted per second. Power is a scalar quantity. The SI unit for power is watts. Horsepower is also a unit of power that is basically used to refer to … Read more
The below article can guide you through the selection of contactors and overload relays for a three-phase DOL starter and how to optimally size a DOL starter. Data required for the selection of contactor and overload relay All the above data can be obtained from the nameplate details on the motor. Parameters to be considered … Read more
As the name indicates, starters are used to start or stop a motor. It consists of an electromechanical switch and protection devices (overload and/or short-circuit protection). Why should we need a starter? An induction motor draws 5-10 times its rated current during start. In order to reduce the starting current, we need a starter. If … Read more
Horsepower and kilowatt are two different units of measuring power. Watts is the SI unit of power. It is a well-defined and normally used unit. This is a simple tool to instantaneously convert kilowatt into horsepower. HP to kW converter Enter HP Mechanical hpElectrical hpMetric hp HP to kW ConvertSwap How to convert horsepower to … Read more
The voltage division rule is one of the basic rules of circuit analysis. It is applicable to all series and combination resistor circuits. A series connection of resistors always acts as a voltage divider. In a series connection, the same current flows through each resistor. Hence the voltage drops across each of them are proportional … Read more
Current flow in a circuit is determined by the impedance offered by the circuit components, which is in turn determined by the way circuit components are connected. Series and parallel circuit connections are the two simplest ways of connecting a circuit. Series connection Series connected circuits consist of two or more active and/or passive devices … Read more
A contactor is a switching device, widely used for the switching of motors, capacitors (for power factor correction), and lights. As the name indicates it is used to make or break contacts like an ordinary on-off switch. The only difference is that the contactors have an electromagnet that holds the contacts when energized whereas switches … Read more
Motor Protection Circuit Breakers and Moulded Case Circuit Breakers and are devices used to open and close a circuit manually and interrupt the circuit automatically on the occurrence of faults. MPCB and MCCB are used to protect against overload and short circuits. The application of Motor Protection Circuit Breaker is entirely different from that of … Read more
RCCBs and RCBO are residual current protection devices. Residual current protection is achieved by monitoring the flow of current in the line and neutral. In a healthy circuit, the current flow through the line will be equal to the return flow in the neutral. In the case of any abnormalities, this return flow may not … Read more
