⚡ UL Class L & Class J (Sub-Cycle Current Limitation, Slashing Let-Through I²t by 90%)

Current-Limiting Fuse Arc Flash Calculator

Model sub-cycle current limitation and let-through energy (I²t in Ampere²-Seconds) for UL Class L, Class J, and Class RK1 current-limiting fuses under IEEE 1584: calculate peak let-through current ($I_{peak}$ clearing faults in <1/4 cycle [4 milliseconds] before peak sinusoidal current is reached), reduce arc flash incident energy to <1.2 Cal/cm², and electrical contracting margins.

1. Project & Operating Inputs

Heavy Distribution Switches Upgraded (Switch Count e.g. 18 Bolted Switches)

Available Short-Circuit Current (kA e.g. 65.0 kA High Fault Bus)

Customer Bid Price for Supplied & Racked Class L/J Fuse Sets ($ / Set)

Bussmann Low-Peak Class L Fuses, Heavy Rejection Clips, NETA Tech ($ / Set)

2. Financial Breakdown & Yield

UL CURRENT-LIMITING FUSES

Turnkey Fuse Coordination Retrofit Profit

Industrial Electrical Engineering Margin

0.0%

Gross Revenue / Bill

Total Project CapEx

Operating / Material Cost