🏢 IEEE C37.20.7 Type 2B (Top-Vented Arc Exhaust Plenum & External Blast Discharge)

Arc-Resistant Switchgear Plenum Calculator

Size overhead blast exhaust plenums and top pressure-relief blow-out flaps for IEEE C37.20.7 Type 2B arc-resistant low and medium-voltage switchgear: calculate blast overpressure venting area (channeling superheated plasma gases and molten metal safely outdoors through roof exhaust ducts without burning personnel standing in front/sides of switchgear), and mechanical construction margins.

1. Project & Operating Inputs

Switchgear Lineups Vented (Lineup Count e.g. 4 15kV Switchgear Lineups)

Arc Fault Current Rating (kA e.g. 50.0 kA 0.5-Second Arc Rating)

Customer Bid Price for Supplied & Structural Steel Mounted Plenum ($ / Lineup)

Heavy-Gauge Welded Steel Plenum, Wall Discharge Louver, Riggers & Tech ($)

2. Financial Breakdown & Yield

IEEE C37.20.7 TYPE 2B PLENUMS

Turnkey Arc Plenum Installation Profit

Substation Structural Mechanical Margin

0.0%

Gross Revenue / Bill

Total Project CapEx

Operating / Material Cost