Powell Industries PowlVac metal-clad switchgear (5-38 kV) and PowlVac-AR

Powell PowlVac metal-clad switchgear, the last US-listed independent building ANSI breakers with priced used supply

This model is part of SecondWatt’s switchgear research catalogue. Specifications and price observations are included where supported by sources. Equipment availability and commercial terms require confirmation.

Powell PowlVac dossier: ANSI metal-clad 5-38 kV with used breakers from 3,960 USD and lineups at 40,000 USD, Powell demand data, inspection checklist.

Why it matters

With Powell's backlog at 2.4 billion USD and book-to-bill at 3.0, the arbitrage between 40,000 USD used lineups and 35,000-75,000 USD per new section widens rather than closes.

Who buys it

Data center developers, utilities, and industrial plants buy PowlVac new and used; the used channel serves buyers who cannot wait 60-80 weeks. Powell's behind-the-meter data center orders show the same buyers increasingly specify it for on-site generation switching.

Role in the data center

Campus medium-voltage distribution and behind-the-meter generation switching, sitting between on-site or utility supply and the step-down transformers feeding hall-level gear. Powell's disclosed data center mega orders indicate growing use at on-site power plants feeding hyperscale load, which is a different duty from conventional campus distribution and drives higher bus ratings.

Key specifications

Technical summary

Type: ANSI metal-clad switchgear with draw-out vacuum breakers. Voltage range: approximately 5-38 kV. Arc-resistant variant: PowlVac-AR. Manufacture: US domestic (Houston-based). Observed used breaker: 3,960 USD. Observed used lineup: 40,000 USD OBO (2 sections, 15 kV). New-section benchmark: 35,000-75,000 USD per section. Class lead time: 60-80 weeks (metal-clad). Demand signal: Q3 FY2026 backlog 2.4B USD, book-to-bill 3.0.

Major variations

PowlVac standard and PowlVac-AR arc-resistant builds across the 5-38 kV range, in standard construction with 1,200-4,000 A main bus and up to 63 kA interrupting, and a narrow-design construction rated to 50 kAIC where floor space is the constraint. The 38 kV line is a separate build at 27 and 38 kV with 1,200-3,000 A main bus and 40 kA interrupting duty. Powell also builds ANSI metal-enclosed low-voltage switchgear and integrated power control rooms, and unusually for medium voltage, both breaker-level and lineup-level trading occur on the secondary market.

Configurations and options

Two constructions and a separate high-voltage line set price. Standard construction carries a 1,200-4,000 A main bus with interrupting duty up to 63 kA; the narrow design trades that down to 50 kAIC to save floor space; and the 38 kV line is a distinct build at 27 and 38 kV with a 1,200-3,000 A main bus and 40 kA interrupting. PowlVac-AR is the arc-resistant variant. Beyond that, section count, breaker rating, relay package and instrument-transformer complement are what move a quote. New sections benchmark at 35,000-75,000 USD each, which is the figure a used lineup has to be measured against.

Compatibility and dependencies

ANSI metal-clad construction with draw-out vacuum breakers, so breaker and cell are a matched pair and a breaker has to be the right rating, generation and truck type for the cubicle it racks into. Bus continuous rating and interrupting duty must be coordinated with the upstream transformer and, on behind-the-meter generation plants, with the on-site generator contribution as well, which is a different and often higher duty than conventional campus distribution. Arc-resistant PowlVac-AR ratings depend on the tested clearances and exhaust arrangement, so the room has to be built to them. Powell also builds ANSI metal-enclosed low-voltage switchgear and integrated power control rooms, which is how a lineup arrives as part of a larger package.

Pricing and availability

Comparable secondary-market band: 20000–20000 $ per section. Trend: rising Two dated observations were logged 2026-08-18 through one seller channel: a used PowlVac breaker at 3,960 USD and a two-section 15 kV lineup at 40,000 USD or best offer, against a new-section benchmark of 35,000-75,000 USD published by Electronate on 2026-03-19. Category direction is documented: medium-voltage switchgear up 50% since 2021 per Electrical Trader, 2026-04-01, with 60-80 week metal-clad lead times per Terrapin Construction Group, 2026-06-10. Powell's own Q3 FY2026 book-to-bill of 3.0, on 2.4 billion USD of unshipped orders, is the demand signal sitting behind used asks. Lead time, new: 60-80 weeks (metal-clad class). Lead time, used or refurbished: 1-8 weeks. Warranty, used: 1-year typical from reconditioning dealers.

Lifecycle and maintenance

Metal-clad MV switchgear routinely serves 40+ years: vacuum interrupters rated for 10,000-30,000 operations far outlast the mechanical duty standby service imposes, so lineup life is governed by insulation condition and relay/controls vintage. Breakers recondition readily and trade as units, while lineups modernize in place with digital relays and retrofit breakers. ANSI/NETA MTS acceptance testing at purchase plus PD surveys in service are the condition gates.

Thermal and emissions profile

Switchgear produces no combustion emissions; the regulatory profile is electrical safety and materials. NFPA 70B became a standard in its 2023 edition, making maintenance programs mandatory rather than recommended, and arc-flash rules (NFPA 70E) govern work practices. LV air-insulated gear carries no F-gas exposure, and construction standards (UL 891, UL 1558, IEEE C37.20.1) plus arc-resistant options under IEEE C37.20.7 define the safety envelope buyers should verify.

Common failure points

• Vacuum interrupters — Loss of vacuum ends interrupting capability with no external sign
• Insulation tracking and PD — Partial discharge across dusty or damp insulation progressing to flashover
• Racking and interlocks — Damaged racking screws and defeated interlocks from forced operation
• Protection relays — Obsolete or drifted relays mis-operate under fault
• Instrument transformers — CT/VT failures disable metering and protection inputs
• Space heater failure — Condensation-driven tracking in unheated outdoor or humid gear

Inspection checklist

Vacuum integrity: hipot test each interrupter per OEM procedure (e.g., 36 kV test on 15 kV class). Insulation resistance: megger bus and breakers at 2,500-5,000 V; compare to ANSI/NETA MTS tables. Contact resistance: micro-ohm each pole; investigate imbalance beyond 50% between phases. Partial discharge: ultrasonic and TEV survey; investigate any reading 6 dB above baseline. Contact erosion: measure vacuum interrupter erosion marks against the OEM wear allowance. Racking mechanism: cycle connect/test/disconnect positions 3 times each; verify interlocks and shutters. Mechanism timing: verify open/close times; closing beyond 5 cycles flags mechanism trouble. Bus insulation: inspect epoxy and boots for tracking or corona; clean and torque joints. Instrument transformers: verify CT/VT ratios, insulation, and fusing.

Procurement channels

Powell direct and rep channels supply new lineups against 60-80 week metal-clad lead times. eBay and dealer channels carry used PowlVac breakers and occasional complete lineups with visible asking prices, which is a rarity in medium-voltage switchgear and makes this platform one of the few where a buyer can benchmark used against new. Powell's order book, at a 2.4 billion USD backlog and a book-to-bill of 3.0, is the leading indicator for where those used asks go next.

Regional notes

A US-built ANSI product for 60 Hz North American practice, made in Houston, with no IEC equivalent; Powell's chief executive describes the company as the last publicly traded firm manufacturing breakers and switchgear domestically. That domestic base is why this is one of the few medium-voltage platforms where both breakers and complete lineups trade used with visible North American asking prices, and why service and spares do not depend on an overseas channel.