Power fuses are like overdraft protection on checking accounts., and in this case, power equipment is the bank. Power overloads are like bouncing a check, and fuses respond to overdraws accordingly, protecting the system and keeping it balanced. In the illustration below, you can see how a current limiting fuse provides “overdraft” protection for power equipment.
Select Steps 1 – 4 of this diagram to see how melting in a Helix Current Limiting Fuse absorbs heat and extinguishes an arcing electrical current.
Fuse Element Melts forming multiple series of arcs at element necks
Heat from arcing melts sand into a “glass” structure called “fulgurite
Fulgurite absorbs heat from arcs, enclosing them, depressing current peak value
Arc is extinguished as current is forced to zero
Read the full original article on Current Limiting Fuse protection.
Key considerations for choosing the right fuse:
Voltage rating: Maximum ac or dc voltage at which fuse is designed to operate.
Interrupting Rating: The highest alternating or direct current fuse is designed to interrupt under specified application.
Continuous Current Rating: Rating fuse can continuously carry current without exceeding temperature rise values.
Coordination: The fuse must be in ‘coordination” with the equipment line and load to ensure melting (overcurrent and arcing time) and clearing (fuse opening time).
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Contributing Author Greg Carter has been working exclusively in Industrial/Electrical Digital Marketing and e-commerce for over 15 years.
Company website: electricalmarketing.net.
email: gcarter@electricalmarketing.net. | Direct 856.381.7834.
