Is manual reset a safety function?
THE DOUBT:
Should the Reset button in a machinery be handled by a safety module, or can it be one of several inputs to the Automation PLC?
The question can be ...
Functional Safety
Is it permissible to install the switch disconnector on the door of an industrial control panel?
THE DOUBT
When analysing switchboards, we sometimes notice that the main disconnector-switch is installed directly on the door of the switchboard, instead of o...
Electrical Safety and Arc Flash Mitigation
The old and the new approach of EU Legislation
Historically, EU legislation for goods has progressed through four main phases:
the traditional approach or ‘Old Approach’ with detailed texts c...
Machinery Directive
Could access to harmonised standards become free of charge?
harmonised standards free
Machinery Directive
Is the EU going to make Harmonised Standards compulsory?
compulsory harmonised standard
Machinery Directive
Type A, B and C Standards
Harmonized standards play an important role in the EU Legislation for the CE Marking of Machineries. ISO classifies the 800+ International technical standards h...
Machinery Safety
Circuit breakers
Circuit breakers are meant to protect the circuit from overcurrents, which can be divided in two categories:
overload, i.e. a current that settles in...
Electrical Safety and Arc Flash Mitigation
Use of type B Residual Current Device
There is often confusion as to whether or not type B residual current devices are required to protect lines in which variable speed drives are used to control a...
Electrical Safety and Arc Flash Mitigation
CE Marking for self made machinery
THE DOUBT: If an employer makes a machinery for use in its own factory, does he have to CE mark it?
CONSIDERATIONS:
Let’s first clarify two important con...
Machinery Directive
Industrial control panels and the door Interlock
Is an enclosure interlocking required for industrial control panels? That is a strongly debated topic and not yet fully understood: let's cle...
Electrical Safety and Arc Flash Mitigation
Protection from direct contacts: IPXXB or IP2X?
THE QUESTION
On the electrical standard, we often read that the assemblies and/or the electrical equipments in general shall provide a degree protection against...
Electrical Safety and Arc Flash Mitigation
Type G and residual current devices: what are the differences?
THE DOUBT
What are the differences between RCDs and Type G Ground Fault Protections?
CONSIDERATIONS
Among possible causes of electric shock the...
Electrical Safety and Arc Flash Mitigation
