In the case of domestic, the sudden switching on(energization) of a great number of fluroescent lights, electronic devices with switched-mode power supplies are especially prone to nuisance tripping in the aftermath of a power failure.
Also any appliance that generates higher order harmonics...
generally dry type transformer are more costier than the oil-filled counterparts of the the same MVA capacity and is usually the only choice when you have to installed at above or below ground level where the containment of the oil(or other liquid such as silicone) is critical in time of tank...
