See this content in form of Youtube video: https://youtu.be/B0mepIWyWEQ
What is Explosion vent
As the name suggests it is part of transformer which prevents explosion of transformer tank and give path to oil for coming out of tank when it's pressure increases
One type of Mechanical Protection
Upper side bent shape pipe connected from main tank to outside atmosphere
Consists aluminium diaphragm at both ends of pipe with wire mesh
Diaphragm provided for prevention of moisture and dust particles inside main tank
Wire mesh provided to prevent entry of diaphragm inside transformer tank
What is PRV
Full form is pressure relief valve
As the name suggests it is valve that relieve excess pressure
One type of mechanical protection
Round shape valve mounted on top of transformer tank with spring mechanism
Why we use explosion vent and PRV
To prevent explosion in case of high pressure inside transformer tank thereby preventing damage to transformer
Equipment safety
Manpower safety
We get NO and NC contact in PRV so that we can trip circuit breaker of transformer when PRV operates
How it works
Gas forms from oil when heavy short circuit inside tank
This creates pressure inside tank
This pressure need to release somehow otherwise tank will explode
This pressure breaks diaphragm of explosion vent and give path to oil and gas
Diaphragm breaks if inside tank pressure is more than 5 PSI or 0.35 kg/cm2
PRV operates if inside tank pressure is more than 0.49 Kg/cm2 or as per demand
How to observe
Glass window is provided on pipe of explosion vent to check oil level
Mounted pin rises upward when PRV operate
No comments:
Post a Comment