How choice of system earthing affects low voltage switchgear?

Choice of system earthing affects not only dependability (in the largest sense) but also installation, in particular with respect to the low voltage switchgear to be implemented. The three system… Read more

Jul 05, 2017 | Edvard

System earthings and incidents on MV side that result in LV disturbances

Low voltage networks, unless a replacement uninterruptible power supply (with galvanic insulation) or a LV/LV transformer is used, are influenced by MV. This influence takes the form of: capacitive coupling, galvanic… Read more

Jun 30, 2017 | Edvard

2 types of synchronisers required on a power system with two supplies

Synchronisers are required at points on a power system where two supplies (either generator and grid, or two grid supplies) may need to be paralleled. They are more than just… Read more

Jun 26, 2017 | Edvard

Practice for good grounding and bonding a home wiring system

All home electrical systems must be bonded and grounded according to code standards. This entails two tasks: First, the metal water and gas pipes must be connected electrically to create… Read more

Jun 19, 2017 | Edvard

Lock-out tag-out practice and seven other steps that save lives

Lock-Out / Tag-Out (LOTO) refers to the specific practices and guidelines to safeguard employees from the unexpected start-up, movement, activation, energizing, release of energy, etc of machinery, equipment, plant, systems… Read more

Jun 16, 2017 | Edvard

Did you test your electrician’s skills recently? Take the quiz. It’s time!

It’s always a good idea to put the sparks into your memory and shed light on things you have learned years ago. Whether you are a rookie in a field… Read more

Jun 07, 2017 | Edvard

3 earthing fault typologies and connection of the CB poles in a DC network

In order to break a short-circuit current in a d.c. system, it is necessary to connect the circuit breaker (CB) poles in a suitable way. To carry out this operation,… Read more

Jun 05, 2017 | Edvard

12 installation tips for implementing a good residual protection

All installations have an earth leakage current that is mainly due to the conductor’s capacitive leakage and to anti-parasitic or EMI filtering capacitors, for example class I equipment. The sum… Read more

Jun 02, 2017 | Edvard

Selecting the suitable frequency converter and motor for these 3 applications

The motor is selected according to the basic information about the process. Speed range, torque curves, ventilation method and motor loadability give guidelines for motor selection. Often it is worth… Read more

May 24, 2017 | Edvard

Troubleshooting of a telemetry system (from RTU to the SCADA computer facilities)

This technical article reviews certain methodologies that may be followed for effective troubleshooting of a telemetry system from the digital or analog field input/output at the RTU to the computer… Read more

May 19, 2017 | Edvard