How to know if you set the correct current on a motor thermal overload relay

The full-load current at a given voltage indicated on the nameplate is normative for setting the overload relay. Because of the variable voltages around the world, motors for pumps are… Read more

Sep 19, 2018 | Edvard

Earth fault protection of an AC motor in 4 different earthing systems

One of the most common faults to occur on a motor is a stator winding fault. Whatever the initial form of the fault (phase phase, etc.) or the cause (cyclic… Read more

Sep 10, 2018 | Edvard

Practical tips on how not to burnout an electric motor

There are many reasons why an electric motor could start heating up. For example, when another starting duty is used than the informed one on the motor nameplate this may… Read more

Aug 15, 2018 | Edvard

Why Raise the Power Factor? The Basics Every Electrical Engineer Should Understand.

A low power factor causes poor system efficiency. The total apparent power must be supplied by the electric utility. With a low power factor, or a high-kilovar component, additional generating… Read more

Jun 06, 2018 | Edvard

Protecting Motor From External Network Disturbances (Unbalance, V/Hz-ratio and Re-Energizing)

Unbalance in the supply voltage is typically due to a broken phase condition somewhere in the upstream network. This may result from single-phase fuse failure or pole discrepancy of a… Read more

Jan 29, 2018 | Edvard

Calculation of shaded-pole motor losses and efficiency at full load in 6 steps

First, let’s say few words about shaded-pole motors, and then dive into calculation procedure. A shaded pole motor is the simplest form of a single phase motor and is very… Read more

Jan 17, 2018 | Edvard

Protection Of Industrial Power Supply Systems (Fuses, MCCBs and Overcurrent Relays Settings)

As industrial operations processes and plants have become more complex and extensive, the requirement for improved reliability of electrical power supplies has also increased. The potential costs of outage time… Read more

Jan 02, 2018 | Edvard

10 Common Questions You Can Expect In Electrical Engineering Examination Test

This examination will focus on testing the fundamentals of electrical engineering from low voltage to high voltage. Of course, you can use huge EEP’s resources for help in calculations and… Read more

Dec 26, 2017 | Edvard

Contactor As An Important Part Of The Motor Control Gear

Motor control gear and associated circuitry are fundamental parts of electrical distribution and utilisation systems. Motor control gear in its simplest form may be a direct on-line starter consisting of… Read more

Dec 15, 2017 | Edvard

10 Different Duty Types (Load Cycle) Of A Three-Phase Asynchronous Motors

The term duty defines the load cycle to which the machine is subjected, including, if applicable, starting, electric braking, no-load and rest de-energized periods, and including their durations and sequence… Read more

Dec 11, 2017 | Edvard

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