ABB (GE heritage) EntelliGuard E LV power circuit breaker (Entellisys-only)
GE-heritage EntelliGuard E power breakers, the Entellisys-only frames ABB still services on a 2023 manual
ABB (GE heritage) EntelliGuard E LV power circuit breaker (Entellisys-only) is one of 41 data center switchgear tracked in the SecondWatt catalogue, each with specifications, lead times and indicative secondary-market pricing.
ABB EntelliGuard E dossier: GE-heritage Entellisys-only power breakers, 50-100 kA ratings, used units priced 6,500-10,000 USD, inspection checklist, tips.
EntelliGuard E is a low-voltage power circuit breaker, not a switchgear line, and the backlog attribution needs both corrections: it is GE Energy Industrial Solutions heritage (ABB-owned since the 2018 GE Industrial Solutions acquisition), and per ABB's own manual DEH-41526 it is designed to protect LV circuits when used with Entellisys low-voltage switchgear only. That single-platform dependence defines the asset: the breaker has no life outside an Entellisys lineup. Ratings run 240/480/600 V AC per ANSI/UL 1066 with interrupting classes of 50-100 kA across breaker types S, N, H, P, E, and M in two envelope sizes, with observed frames from 800 A sensors to 3,200 A. Standards coverage spans ANSI C37.13/.16/.17/.50 and CSA 22.2 No. 5.1. ABB maintains the manual (revised March 2023) and Entellisys renewal parts, making this a legacy-supported rather than orphaned platform. The used market is real and priced: a 3,200 A unit sold used-tested at 10,000 USD and a 2,000 A frame with 800 A sensor at 6,500 USD, both with test reports, while Bullock stocks matching frames quote-only. Buyers are Entellisys owners keeping spare breakers against 54-week LV switchgear leads.
Why it matters
Platform-captive breakers are the sharpest scarcity play in the used LV market: the Entellisys fleet runs critical facilities, ABB ships renewal parts but new-build economics favor its Emax line, and every retired lineup that gets parted out feeds a spares pool buyers compete for. At 2-3 USD per frame-amp observed, tested spares cost a fraction of a lineup outage.
Who buys it
Entellisys switchgear owners are the entire market: data centers, hospitals, and plants that standardized on the platform in the 2005-2018 GE era and need spare or replacement breakers. Dealers stock the frames because a failed breaker in an Entellisys lineup has exactly one fix. Buyers outside the Entellisys installed base have no use for these units.
Role in the data center
Spare and replacement main/feeder breakers for Entellisys LV switchgear lineups in legacy data centers; a spares-pool asset rather than a new-design choice.
Key specifications
| Voltage ratings | 240 / 480 / 600 V AC |
|---|---|
| Interrupting range | 50-100 kA |
| Platform restriction | Entellisys LV switchgear only |
| Listing standard | ANSI/UL 1066; CSA 22.2 No. 5.1 |
| Breaker types | S, N, H, P, E, M |
| Manual revision | DEH-41526, March 2023 |
| Ownership chain | GE Industrial Solutions to ABB (2018) |
| Observed used 3,200 A | 10,000 USD (tested) |
| Observed used 2,000 A frame | 6,500 USD (tested) |
Technical summary
Type: LV power circuit breaker for Entellisys switchgear only Voltage: 240 / 480 / 600 V AC Standard: ANSI/UL 1066; CSA 22.2 No. 5.1 Interrupting: 50-100 kA by voltage and breaker type Breaker types: S, N, H, P, E, M Envelopes: 1 and 2; observed frames 800 A sensor to 3,200 A ANSI coverage: C37.13, C37.16, C37.17, C37.50 Support: ABB manual DEH-41526 revised March 2023 Heritage: GE Energy Industrial Solutions; ABB-owned since 2018
Pricing and availability
Comparable secondary-market band: 6500–10000 $ per breaker. Trend: up Lead time, new: Renewal-parts channel only (legacy product). Lead time, used or refurbished: 1-4 weeks (dealer stock). Warranty, used: 1-year typical from reconditioning dealers.
Lifecycle and maintenance
LV power circuit breakers serve 30-40 years on 3-5 year maintenance cycles per ANSI/NETA MTS and NFPA 70B, with mechanism lubrication and injection testing the critical items. A deep reconditioning ecosystem (Relectric, NAS, Bay Power, Bullock) tests to NETA specifications and warrants units for 1 year. OEM trip-unit retrofit programs (Eaton PXR, ABB EntelliGuard R, Siemens 3WA retrofit) extend installed platforms past electronics obsolescence, which sustains used-breaker values.
Common failure points
- Mechanism springs and lubrication — Slow trips, trip-free on close, failure to latch on aged units
- Trip unit electronics — Nuisance trips or no-trip from aged or obsolete electronics
- Contacts and arc chutes — Overheating and interruption failure from eroded contacts or cracked chutes
- Secondary wiring — Control faults from damaged secondary disconnects and aux switches
- Provenance and counterfeits — Counterfeit or mis-labeled breakers fail catastrophically under fault
- Cassette and racking wear — Misalignment and cluster contact damage on worn cradles
Inspection checklist
Mechanism — exercise open/close 10+ cycles; verify charge/close/trip sequence without trip-free behavior Trip curve — primary injection test; NETA field data shows 22% of LV power breakers off their published curves Secondary injection — verify all 4 protection functions (LSIG) against settings; record as-found/as-left values Contact resistance — micro-ohm test each pole; investigate readings above 1.5x sister poles Insulation resistance — megger at 1,000 V per ANSI/NETA MTS acceptance tables Contact wear — inspect arcing contacts and wear indicators against the OEM replacement limit Arc chutes — remove and inspect for cracks, erosion, and metal splatter; replace damaged chutes Lubrication — verify mechanism grease condition; dried lubricant is the leading slow-trip cause on 20+ year units Racking — exercise draw-out mechanism through connect/test/disconnect; verify shutter operation Auxiliary wiring — verify secondary disconnects, charging motor voltage (24-125 V options), and aux contacts Trip unit vintage — identify electronics generation; obsolete trip units reprice the breaker toward core value Counterfeit screen — verify serial numbers with the OEM; counterfeit LV breakers documented since the 2007 CPSC recall Ratings match — confirm frame, sensor/rating plug, and interrupting rating (kA at 480 V) against the application Listing match — verify cassette/cradle compatibility and UL 1066 or UL 489 listing matches the switchgear type Records — factory test report, service history, and injection results; missing records reprice toward as-is
Procurement channels
EMSCO (priced, tested units), Bullock Breakers (firm-price dealer), and the Entellisys renewal-parts channel through ABB. Supply is parted-out lineups and project surplus.