Energy and Power
Things About MCBs That Every Low Voltage Electrician Should Know
Miniature circuit breaker – 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…. Read more
Aug 22, 2015 | By Edvard Csanyi
Energy and Power
Two Circuit-Breaker Types For Automatic Disconnection Of the Supply
The Standard IEC 60364 prescribes automatic disconnection of the supply for protection against indirect contact. The protective device shall automatically disconnect the supply so that, in the event of a… Read more
Jul 20, 2015 | By Edvard Csanyi
Energy and Power
Example for Coordination of Cascaded Circuit Breakers
A 440 V 60 Hz switchboard feeds a 4-wire distribution board for small loads such as socket outlets. The switchboard has a fault making capacity of 100kA rms. After applying… Read more
Jun 24, 2015 | By Edvard Csanyi
Energy Efficiency
3 Lighting Essentials You Can’t Deny
Lighting systems in industrial facilities can represent an attractive savings opportunity, especially if lighting systems have not been upgraded or maintained in the past five years. The most cost-effective approach for lighting… Read more
Apr 03, 2015 | By Edvard Csanyi
Energy and Power
4 Low Voltage Switchboard Partitioning Forms Defined By IEC 61439-2
There are 4 main reasons for partitioning a switchboard. To protect persons against direct contact with dangerous parts. The minimum degree of protection must be IPXXB. To protect the switchboard against the penetration… Read more
Mar 20, 2015 | By Edvard Csanyi
Low Voltage
Degradation of Insulation in Switchgear (What’s Really Happening)
Electrical insulation is subjected to electrical and mechanical stress, elevated temperature and temperature variations, and environmental conditions especially for outdoor applications. In addition to normal operating conditions, there are a… Read more
Mar 04, 2015 | By Edvard Csanyi
Low Voltage
Inspection, Test and Measurement Procedures for LV and MV (up to 36kV) Switchgear
Installed in clean, well ventilated or air-conditioned locations, switchgear will require little routine maintenance. Major inspection should be scheduled for power plant shutdowns and concentrate for low voltage switchboards on identifying contact… Read more
Jan 16, 2015 | By Edvard Csanyi
Energy and Power
Electrical life (durability) of LV circuit breakers due to the switching operations
According to the standard IEC 947-2, there is actually no defined stipulation regarding the requirements of electrical life of a circuit breaker. The numbers of switching operations which a circuit… Read more
Dec 01, 2014 | By Edvard Csanyi
Low Voltage
7 practical tips for installing a good measuring system
There are different product families on the market: instruments that measure a single electric parameter (voltage, current, frequency, phase angle cosϕ), generally used in single phase systems, as instrumentation on… Read more
Nov 14, 2014 | By Edvard Csanyi
Low Voltage
Guidelines to maintenance of low voltage switchboard
A well-executed maintenance program can provide the following benefits: Longer life of switchboard and fewer replacements; Reduced time on repairs and overhauls, and the option of scheduling them at an opportune… Read more
Oct 24, 2014 | By Edvard Csanyi
Energy and Power
Rating Definitions Applied to Low Voltage Molded-Case Circuit Breaker (MCCB)
The molded-case circuit breaker is the “workhorse” for system protection 600V and below. A circuit breaker is a device designed to open and close by nonautomatic means and to open the… Read more
Sep 19, 2014 | By Edvard Csanyi
Energy and Power
Methods Of Securing LV Circuit Breakers
Circuit breakers are typically secured in place by one of the following methods: Through bolts Bolted to the bus Stab locked to the bus or some type of receptacle connection… Read more
Aug 11, 2014 | By Edvard Csanyi
Energy and Power
Methods Of Mounting LV Circuit Breakers
Methods used to mount circuit breakers can be divided into three general groups, those being: Fixed Removable (disconnectable unit), and Drawout (withdrawable) A review of these mounting methods follows. A… Read more
Aug 08, 2014 | By Edvard Csanyi
Low Voltage
10 Important Precautions When Working On Low Voltage Energized Equipment
For most work, the electrical equipment must be de-energized because there is a high risk of injury to workers if they work on energized equipment. It may be possible to schedule such… Read more
Jul 18, 2014 | By Edvard Csanyi
Energy and Power
Harmonic distortion and high frequency applications
The presence of harmonic frequencies in addition to the fundamental 50Hz, bring about distortion of the fundamental sine wave. Considerable problems may arise dependant upon the level of this distortion…. Read more
Jul 07, 2014 | By Edvard Csanyi
