As long as the TV can switch from NTSC to PAL (it probably can, but still check) and that the TV can switch voltage from 120 V to 240 V (and you have the right adaptor to physically plug it in to the power point), it should work.
I’m not sure about whether it will be able to receive television signals (and it would depend if the TV is for analogue or digital), but even if for some reason you can’t, you could just plug in a local digital box (I assume New Zealand is similar to Australia in this respect) which most people have to do if they want digital television anyway, even with a regular New Zealand TV.