Replacement Trip Units

We supply, worldwide and from stock, replacement trip units for Schneider / Merlin Gerin Masterpact and Moeller breakers as well as for ABB, Terasaki and Mitsubishi breakers.

Please call for a price.
01299 251758

Amp-Safe-Pro (dual Hz frequency*)

The Amp-Safe-Pro is a direct replacement trip unit for the STR trip units on the Schneider / Merlin Gerin Masterpact M, MP, IEC, UL and Square D breakers, and the Moeller IZM (which is identical to the Masterpact M).

The Amp-Safe-Pro does not use rating plugs and is user programmable to replace any versions of the STR 18M, 28D, 38S, 58U. It has the same protective functions, settings and time-current-curves as the original STR units, over current, instantaneous over current and ground fault.

The Amp-Safe-Pro Plus is identical to the Amp-Safe-Pro, with the additional feature of wireless or wired RS485 communications.

We can pre-configure your new Amp-Safe-Pro unit for you, to make it ready to install upon worldwide delivery. Please watch this video or call us now.

*PLEASE NOTE Since April 2015, the Amp-Safe-Pro has also been available as a fixed, 60Hz unit. We can supply this trip unit (indicated by a red facia), but this is only suited to countries which use a 60Hz system and will not function correctly if used within a 50Hz system. Our standard (green facia) Amp Safe Pro is dual frequency and UL/CE approved. It is specifically produced to operate in the United Kingdom and Europe but is suitable for worldwide service. Both the fixed and duo frequency models come with a two year warranty.

Micrologic Protection Unit

The standard control unit for all Masterpact NT/NW breakers, Micrologic control units offer direct access to system information. The ability to store information and to record events thus ensures increased productivity in terms of energy distribution management.

To become an agent for our trip units and other Masterpact parts, click here.