Purge Panel is a way to install safe electrical and electronic equipment in dangerous areas with flammable gases, corrosive gases, conductive dust, or a mix of these. In Purged Panels or purged enclosures, gases from the outside can’t get in because the enclosure is kept at a positive pressure. This ensures that the inside devices are safe from harmful gases and vapours in the air.
The Fire Triangle Principle is the basis for protection by Purged Panels
Getting rid of any of the following things from electrical panels can prevent a fire:
Fuel – Purging gets rid of flammable or explosive gases and fumes.
Ignition – 1) Staying away from devices that can start a fire
2) Turning off the power to equipment that can start a fire
Oxygen: Covering it with a neutral gas keeps it from coming into contact with air.
Compared to traditional flame-resistant panels (Ex-d type)
Explosionproof/ Flameproof Enclosures have been used for a long time to keep equipment safe in hazardous areas. They are made to meet the standard IS/IEC 60079-1: 2007, Equipment Protection by Flameproof Enclosures “Ex-d.”
Most of these enclosures are made of Die-Cast Aluminium Alloy, which makes it hard to make them bigger. They are cheap and work well for smaller jobs. Also, the main goal of explosion-proof enclosures is not to stop explosions but to keep them from spreading.
Purging Panels can get around these problems with specially made IP 66 Enclosures and Pressure Monitoring Mechanism.
The pressure inside the Purged Panels is kept steady by a regulator and a system for monitoring and tripping in case of a problem.
The Many Different Methods for Explosion Protection
No matter what kind of industry it is, there is no doubt that purge panels are the best way to protect against explosions. One of the primary purposes for which it is used worldwide is that it can be used in many different ways.
Quick Way to Exchange
One of the essential parts of purging is getting rid of dangerous gases and replacing them with non-dangerous gases while keeping the pressure inside the enclosure high. This method, called the rapid exchange method, is used for air exchange.
The dangerous gases are pumped out and replaced with gases that don’t do anything. So that nothing outside of the enclosure can get in, it is pressurized and filled with inert gas. Once all of these steps are finished, the power is turned on.
No technology can last if it doesn’t change. To keep up with new trends, you must come up with new ideas, and the industrial control panel is no different. In the beginning, the whole point of purge panels was to stop explosions.
But it has gone through some changes that have made it safer. Now, purge panels have alarm systems that let people know if there is a drop in pressure or a gas leak in the enclosure. If an alarm goes off, the power is turned off automatically.
The Most Important Things
Four main things affect how good purge systems are chosen. They’re
1 Area Classification
Classifying an area plays a small part in both purge and pressurization. Because the classification mostly depends on whether or not there could be dust or gases that could catch fire. The danger level changes depending on how likely it is to catch fire.
2 Rating of the Equipment
The rating of the equipment used nearby is also essential. Even though some businesses are in places that aren’t dangerous, their equipment could still cause an explosion.
3 Types of Enclosure
Different types of enclosures are used in various fields and for various reasons.
- Type X System – General Purpose
- Type Y System – For Zone 2
- Type Z System – For Zone 2 (specifics)
4 How much Power does the Equipment Need?
The equipment that is used in the building is a crucial factor. Equipment that uses a lot of power needs a strong case and extra care, which is not the case for equipment that uses low or average amounts of energy.
Even though many other factors need to be considered, the ones listed above are the most important ones when choosing the best purge panel systems.