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12Jan 20206 Dec 2020

Basic Questions to Ask About Control Panels

By Jerry Smith Electrical control panels are designed and used to control mechanical equipment. Each one is designed for a…

24Jul 201928 Feb 2021

Introduction to Relays

A relay is an electrically operated switch. It consists of a set of input terminals for a single or multiple…

11May 201914 Feb 2021

Line and Load Reactors Basics

Reactors can protect both motors and variable frequency drives (VFDs) from harmful current and voltage spikes. Reactors also help reduce…

Selecting the Appropriate Materials for Industrial Enclosures

By Rittal Selection Criteria Environmental Considerations In order to select the appropriate enclosure for an application, the environment to which the enclosure will be exposed must be considered. Most installation…

Fuses

Consolidating Inventory Reduces Costs and Upgrades Safety – The Fuse Protection Review

31 Jan 202131 Jan 2021

By Mike Lang Downsizing. Layoffs. Budget cuts. Belt-tightening. These are all-too-familiar phenomena. The persistently sluggish economy is driving industry to protect profitability by trimming costs while maintaining target productivity and…

Fuses

Motor Overcurrent Protection

31 Jan 202131 Jan 2021

By Ferraz Shawmut Overcurrent protection of motors is a threefold problem involving normal starting currents, stalled rotors, and running overloads. Many motors draw starting currents several times their full-load ratings,…

Why it Often Pays to Choose Custom Rather than Standard Sensors

29 Dec 20208 Feb 2021

Sam Drury, Sales & Marketing Director at Impress Sensors & Systems Ltd, explains why some engineers prefer custom pressure sensors over standard, off-the-shelf versions. A standard, off-the-shelf pressure sensor refers…

How Silicon Pressure Sensors Work

The historical problems associated with silicon oil-filled pressure sensors are well documented. However, recent advances in sensor design has led to improved versions that overcome many of these disadvantages, says…

Motors

Fault Finding – Three Phase Induction Motors

6 Dec 202027 Feb 2021

All electric motors have their predetermined life span, typically ranging from 30,000 to 40,000 hours. However, this is dependent on proper maintenance - without which they are likely to break…

Fault Finding – Single Phase Motors & Standard Controllers

6 Dec 202016 Dec 2020

ProblemPossible Cause'ACO" (and 'MCO') Does not Close when Start is Called for.Fault with supply. Power supply absent at terminals L1, L2 and N. External control circuit is blocking operation. Thermal…

Motors

Choice of Correct Type of Motor

30 Nov 202030 Nov 2020

We will now consider the various types of motors that are available and relative merits of each. THE SQUIRREL CAGE ROTOR MOTOR. This is the most common of motors that…

Motors

Temperature & Insulation – A Brief Guide

REFERENCE STANDARDS IEC 34-1, BS 4999, AS 1359.32. TEMPERATURE RISE AND MOTOR LIFE The “Life” refers to the life of the windings before they require rewinding. The Temperature rise of…

Motors

How Does A Motor Work?

19 Nov 202019 Nov 2020

THEORY In very basic terms, the reason that the shaft of any motor rotates ( when the motor is switched on) can be explained by one law of Electromagnetic theory.…