IEC breakers & contactors · current and obsolete

Air Circuit Breaker and Contactor Ranges We Repair

The IEC-frame switchgear that European OEMs build into turbines, drives and switchboards: Masterpact, Emax, Siemens 3WL, IZM and TeSys LC1F, fixed and drawout, current and obsolete. Each one is stripped, rebuilt to OEM limits, injection-tested and flown back to your site with a certificate.

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BreakersAir circuit breakers 630–6300 A
ContactorsTo 2100 A
Door to doorAbout 8–11 working days
Warranty24 months on overhauls

Air circuit breaker pole assemblies with contact fingers and arc chambers exposed during strip-down — ACB contacts and arc chambers on the benchWorkshop

Air circuit breakers

Breaker ranges

Each range has its own page covering the faults we see, what a refurbishment replaces and how the unit is tested.

Air circuit breaker operating mechanism with rust across the links and pins

Schneider · obsolete since 2003

Masterpact M

M08 to M63 with STR trip units, repaired in the original chassis instead of an MTZ retrofit.

Masterpact M

Schneider Masterpact breaker with Micrologic trip unit in a panel

Schneider · Micrologic

Masterpact NW & NT

NT06 to NT16 and NW08 to NW63, IEC and UL versions, fixed and drawout.

Masterpact NW & NT

ABB SACE Emax E3N-A stripped for overhaul on the workshop bench

ABB SACE · PR1xx

Emax E1–E6

First-generation Emax with PR111 to PR123 trip units, including UL-listed "-A" versions.

Emax E1–E6

ABB SACE · Ekip

Emax 2

E1.2 to E6.2 with Ekip trip units, tested with ABB's Ekip test kit.

Emax 2

Siemens · ETU

Siemens 3WL

Frame sizes I to III. 3WA trip units don't fit a 3WL, so repair keeps the cell as it is.

Siemens 3WL

Air circuit breaker operating mechanism on the workshop bench

Eaton · Moeller

Eaton / Moeller IZM

IZM20 to IZM40, IN and IZMX. The older IZM shares the Masterpact M mechanism.

Eaton / Moeller IZM

Contactors

High-current contactors

Above about 100 A, rebuilding a contactor usually beats buying a new one. The frame already fits the enclosure, the busbars and the control wiring.

Restored contacts on a Schneider LC1F780 contactor

Schneider TeSys F · obsolete since 2023

LC1F contactors

LC1F265 to LC1F2100. Contacts, pole carriers, coils and auxiliaries, tested for pick-up and drop-out.

LC1F contactors

Industrial control panel with contactors and breakers

ABB · Siemens

ABB AF and Siemens 3RT / 3TF

ABB AF and A-series, Siemens 3RT and 3TF. Rebuilt with contact sets and coils, tested the same way as an LC1F.

Contactor coverage

Molded-case breakers

MCCBs, where repair makes sense

A small modern MCCB is a commodity, and if one fails we'll tell you to buy a new one. Repair earns its keep on large frames, roughly 630 A and up, on motorized breakers and on obsolete types where a like-for-like replacement no longer exists.

We work on ABB Tmax, Schneider Compact NS and NSX, Siemens 3VL and Eaton NZM where it is economic: operating handles, motor operators, adjustable trip units and auxiliary switches. Every repaired MCCB is trip-tested by secondary injection before it goes back.

Not listed?

Send us the nameplate

Older and less common ranges can often be supported from donor stock and re-machined parts. A photo of the nameplate and a description of the fault is enough for a first answer, the same working day.

Fixed and drawout, IEC-frame and UL-listed versions
Injection-test certificate, photos and parts list with every unit
Exchange units for many models, held in the UK*

Ask about your breaker How it works

*Subject to model and rating.

Send us the nameplate

A photo of the nameplate and the fault is enough for a first answer. We reply the same working day with a recommendation and a price for diagnosis and freight.

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