🛡️ UL 1449 5th Ed (Type 1 Service Entrance 200kA/Phase & Type 2 Panelboard 100kA)

Surge Protective Device (SPD) Calculator

Size multi-stage cascaded Surge Protective Devices (SPD / TVSS) under UL 1449 & IEEE C62.41: calculate required peak surge current capacity (200 kA per phase Type 1 at the main 480V service entrance and 100 kA Type 2 at branch panelboards), select Voltage Protection Rating (VPR <1,200V L-N), Nominal Discharge Current (I_n = 20 kA), and electrical surge margins.

1. Project & Operating Inputs

Electrical Distribution Panels Protected (Panel Count e.g. 18 Panels)

Service Entrance Available Fault Current (kA e.g. 65 kA AIC Fault)

Customer Bid Price for Supplied & Landed SPD Package ($)

UL 1449 Type 1/2 SPDs with EMI/RFI Filters, Disconnects & Electricians ($)

2. Financial Breakdown & Yield

UL 1449 5TH ED CASCADED SPDS

Turnkey Facility SPD Package Profit

Power Quality Contractor Margin

0.0%

Gross Revenue / Bill

Total Project CapEx

Operating / Material Cost