Hi, 210Watts! do you issue guests with sunglasses?
Seriously tho' 210W running plus transformer losses is quite a high load going on at once and cold halogen bulbs draw several times their running load at switch on, if your circuit is suitable ie low enough earth loop impedance the answer may be a change of circuit breaker type from usual 'B' to 'C' type,
Are there likely to be other options - like
adding in a transformer and a dimmer so that it would draw less power when cold?
or something even easier like
low energy halogen bulbs that start off slowly and dont drawer all the power at once?
There are many options easy one is two transformers and two switches with some transformers you can use dimmers which would also reduce the in-rush but I would not use them myself matching types can be a pain. So much relies on the exact type of transformer or inverter used. Changing type of transformer or inverter could also help. Many inverters have in built protection from in-rush.
A transformer is just a couple of coils of wire around a former but an inverter has electronics which turn AC to DC then back to AC at high frequency then transform to output voltage with often a feed back to correct the electronics to give a stable output even when the input voltage varies. They look the same but inverters are often lighter.
DIY how to tutorial projects and guides - Did you know we have a DIY Projects section? Well, if no, then we certainly do! Within this area of our site have literally hundreds of how-to guides and tutorials that cover a huge range of home improvement tasks. Each page also comes with pictures and a video to make completing those jobs even easier!