The PGR-8800 can be used on electrical systems operating at any voltage (ac or dc) since it does not directly connect to the system. The system is monitored with light sensors and optional current transformers (for ac systems) that can be selected for any current/voltage rating. The small size of the PGR-8800 allows for installation in any switchgear cubicle, transformer compartment, or motor control center bucket.
How much energy is in a typical arc-flash incident?
A phase-to-phase fault within a 480 volt system with 20,000 ampere of fault current provides 9,600,000 watts of power. Imagine that there is no arc protection and the fault is allowed to last for 200 milliseconds. The resulting energy would be 1,920,000 Joules. TNT releases approximately 2,175 Joules/gram when detonated, so this arc flash would approximately correspond to the detonation of 883 grams of TNT. One stick of dynamite contains approximately 1,000 grams of TNT.
Download this white paper to learn more and find the answers to different questions suchs as the ones listed below:
- Do Arc Flash relays lower Personal Protective Equipment (PPE)?
- Do power system analysis software, such as SKM, EasyPower, and ETAP, recognize Arc Flash relays?
- How do Arc Flash relays coordinate with other protection relays?
- Do Arc Flash relays provide zone identification?