GT Engineering performs analyses of Electrical Hazard based on what is required by the Article 80 of D.Lgs 81/08. We consider both the hazard of direct and indirect contacts and the arc flash hazard, using the methodology of NFPA 70E and the IEEE 1584 algorithm.
The safety curve and the TN system
Everyone knows that current is dangerous, but how can you tell what the dangerous threshold value is?
The breaking capacity of a Branch Circuit Protective Device (BCPD)
One of the problems related to the dangerousness of electrical current is the fact that cables and utilisers can catch on fire if traversed by a current bigger than the one predicted for its normal use.
The let through energy for protective devices
Like we well know electrical components have a lifetime, which is calculated considering the energy that trasverse them. The electrical energy like expressed from the english physician James Prescott Joule its explained like it follows:
Fault Protection and the Fault Loop
The Doubt: How to protect people from electric shocks?
Spare capacity in Industrial Control Panels
The Doubt: In an Industrial Control Panel, is it required to leave a certain Spare capacity for “future” development?
Is IEC 61439-1 applicable to Industrial Control Panels?
The doubt: in order to CE mark an Industrial Control Panel, shall I follow the prescriptions given by IEC 61439-1?
Double Bonding
THE DOUBT
We sometimes notice electric motors having a double bonding. Is it mandatory?
Six key symbols for Electrical Safety
Electrical Safety is well standardized, in the sense that there are may technical documents written on the Subject, normally by the International Electrotechnical Commission, or IEC.
Contactors used in Safety Applications
There are three types of contactors used in Safety-related control Systems:
What has to be bonded? The rules in USA, Canada and Europe
THE DOUBT: What is the rule to be followed in order to decide what has to be connected to a PE cable? What shall be Grounded and what shall be Bonded? We c...
Bonding, Earthing and Grounding, what is the difference?
THE DOUBT: What is the difference between Bonding, Earthing and Grounding? Is the motor frame grounded or bonded?
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Is the simbology defined by IEC 81346-2 compulsory?
IEC 81346-2 Standard: compulsory symbology and codes?
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