max. switching power of relay in datasheet
Your relay can switch 7A of a resistive load at 277V AC
It can handle 10A (but not whilst switching) so that gives a
theoretical maximum power of 10A × 277V AC = 2770 VA

The figures on the other side of the solidus (or slash) refer to DC, 10A × 30V = 300W.

If you switch an AC appliance that takes 1kW at 230V that presents a resistive load, then it will work fine.

For an inductive load you need to de-rate (reduce) the permitted switching current, your datasheet should provide the information, but typically relays are de-rated between 2x and 8x for inductive loads. If you take the extreme end of that spectrum (8x) you get

7A/8 × 230VAC = 161W

So your ceiling fan should be fine. The life of the relay will be shortened, but should still be acceptable.

It usual to switch on inductive loads at zero crossings to avoid this problem, solid state relays exist which will do this for you automatically.