Technical Articles

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19 Essential Information You Can Find On Motor Nameplate

Understanding motor’s nameplate Motor nameplate is normally located on all produced electric motors. Understanding nameplate information can be hard sometimes, but is essential. In most countries it is a requirement for manufacturers to display all information on the motor’s nameplate, but often this is not the case. However, when a motor has been in operation […]

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Few Good Tips For Estimating and Optimizing Pumping Energy Costs

Duration diagram // To help estimate pumping energy costs To compare different system and pumping equipment proposals and make an intelligent choice, three facts will need to be established: Will the process require varying flow rate, and, if so, must it be continuously variable or can flow rate be varied in steps? Can on-off batch pumping […]

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Electrical Design Project Of a Small Bakery (1)

Electrical System of Bakery A small bakery with just a counter and storage areas is simple to design. The electrical design follows the layout for a house, but care must be taken on loading factors if direct-acting electric heaters are switched on all day. These days, many shops and stores have specialised equipment for cooking food or providing other […]

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PLC Latch (Flip-Flop) Logic Function – Like a Sticky Switch!

Typical events used by a PLC More complex systems cannot be controlled with combinatorial logic alone. The main reason for this is that we cannot (or choose not to) add sensors to detect all conditions. In these cases we can use events to estimate the condition of the system. Typical events used by a PLC […]

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Things About MCBs That Every Low Voltage Electrician Should Know

MCB Operation and characteristics An MCB is a thermo-magnetic device, meaning that it has two methods of circuit interruption. A thermal mechanism, usually a bi-metallic strip, provides protection against moderate overcurrent. The heating action of the current causes the bi-metallic strip to curve and break circuit contact. This method is complemented by a solenoid designed to respond to […]

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Installing Sensors Incorrectly As a Mistake #2 In Instrumentation

Four Sensor ‘Poors’ To Avoid Generally speaking, there are four ‘Poors’ that can lead to incorrectly installing instrumentation sensors: Poor placement Poor control Poor protection Poor grounding Each of above sensor ‘poors’ are described below, and by the way… have you read what is the mistake No.1 in an industrial instrumentation? 1. Sensor Placement The best sensor […]

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Kirchhoff’s Laws For Electrical Engineers – Beginners

Voltages and currents in electric circuits Two extremely important principles in electric circuits were codified by Gustav Robert Kirchhoff in the year 1847, known as Kirchhoff’s Laws. His two laws refer to Voltages and Currents in electric circuits, respectively. Kirchhoff’s Voltage Law Kirchhoff’s Voltage Law states that the algebraic sum of all voltages in a […]

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Selecting Wrong Sensor As a Mistake #1 In Instrumentation

Instrumentation issues Despite ongoing advancements in measurement technology, instrumenting a process for feedback control remains a technical challenge. Today’s sensors are certainly more sophisticated than ever before, and fieldbus technology has simplified many installation issues considerably. Nonetheless, much can still go wrong with an instrumentation project. Selecting the wrong sensor Technology mismatch // Although it’s […]

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4 Steps To Follow During Commissioning of a PLC System

PLC programs are never final… Yes, PLC programs are never final, it is always possible to make corrections and subsequent adaptations to new system according the customer requirements. Even during commissioning, program changes are often necessary. The commissioning of a system can be divided into four steps: Checking the hardware Transferring and testing the software […]

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Few Advices For Improving Integrity Of Protective Conductor

Earthing in a high leakage current environment Most modern electronic equipment uses switched mode power supplies (SMPS) which draw pulses of current from the mains supply rather than a continuous sinusoidal current. The fast rise time edges of the current waveform contain high frequencies that can cause serious radio frequency interference (RFI) to other equipment in the vicinity. […]

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