Explosive Atmosphere Flashcards
1
Q
What is a flameproof enclosure
A
It is designed so that an explosion cannot escape the housing and not ignite the explosive atmosphere around it
2
Q
How can combustible dust be ignited
A
Arching or sparking of electrical parts
Radiated energy
By mechanical sparking
3
Q
What is an intrinsically safe circuit
A
Current and voltage are limited so no spark or thermal effect can cause a explosive atmosphere to ignite
Resistor in series limits current
Zener diode limits voltage
