R D S wrote:

Our landlord has had a consumer unit fitted in place of a fusebox at the
shop we rent.

One of the machines I use, when starting up, is causing a breaker to
trip. The machine contains little more than a big motor.

What's the solution?
Bypass the CU and put it on a fused switch?

What current is the appliance rated at, and what current is the relevant
circuit breaker rated at?

It is likely that it is drawing too much current to start up the motor.
A change to a 'C' type MCB may work (usually B type breakers are fitted,
the C allows a bigger current to be drawn for a short time), or if the
cabling allows, a bigger rated breaker.

Alan.

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