As far as I understand, when a line of communication or supply is interrupted, it can be said like this:
They cut off electricity yesterday.
Is it correct? At least Google shows this collocation is often used.
Now what if I want to give additional information as to who exactly was cut off. Can I use indirect object like for the verb give?
They cut off us electricity.
Or should I say:
They cut off electricity to us
And if neither is correct, how would you say it?
Your second sentence ("They cut off us electricity") is incorrect, and your third is seemingly correct, judging by a Google Books search:
When they dismissed us, they cut off electricity to the villages outside Nablus. (Staughton Lynd, Alice Lynd, Sam Bahour, 1994)
Another option is getting rid of the idea to use an indirect object (or a prepositional phrase like "to us") in favor of the possessive determiner our:
A severe winter storm cut off our electricity for almost a week. (Angelyn J. Keegstra, Shana Galen, 2015)
It went on and on. Then they cut off our electricity, which cut off our water supply. (Morgan & Kennedy, 2004)
