Differences beetween FLA and FLC
THE DOUBT:
In North America, each motor has two current values:
- Full-Load Ampere (FLA)
- Full-Load Current (FLC)
What are the differences and when are the...
UL and CSA Conformity
Equipment Protection Level
In an explosive atmosphere, only suitable equipment must be installed: suitable means that they cannot ignite the explosive atmosphere.
Process Safety
"Proven in use" and "Prior use"
THE DOUBT: What is the difference between a Proven in Use and a Prior Use Device?
Actually the two terms are quite similar and it is very easy to mix t...
Process Safety
ATEX Equipment Grouping
In an explosive atmosphere, only suitable equipment must be installed: suitable means that they cannot ignite the explosive atmosphere. There are 3 types of Explosive atmospheres
ATEX Risk
The difference between Route 1H and Route 2H
THE DOUBT: What is the difference between Route 1H and Route 2H?
Let’s try to place the subject into the main picture. When you hear about Route 1H and 2...
Process Safety
The Modular Approach for Control Panels, EN 60204-1
To CE mark my Automation Panel, or my Control Panel, shall I do some EMC tests?
Machinery Safety
The safety curve and the TN system
Everyone knows that current is dangerous, but how can you tell what the dangerous threshold value is?
Electrical Safety and Arc Flash Mitigation
P1: Reliability data for components used in safety systems
THE QUESTION: What are the main reliability data for components used in Security Systems?
When it comes to components used...
Process Safety
The Breaking Capacity of a Short-Circuit Protective Device (SCPD)
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.
Electrical Safety and Arc Flash Mitigation
P2: The Safe Failure Fraction and the Architectural Constraints
A Safe failure is the failure of an element, inside a component that plays a part in implementing a safety function, that results in a spurious operation of the safety function. That means, it places the machine into a safe state (it generates and em...
Process Safety
P3: Considerations on the Safe Failure Fraction in High and Low Demand
In a previous article we presented an important parameter, used in both high and Low Demand Mode Safety Systems: the Safe Failure Fraction.
Process Safety
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:
Electrical Safety and Arc Flash Mitigation
