What is it called when the 60hz line power becomes something else?

[MicroVAXes don't care]... Ahh, good thing. [What did it become?] Who knows hertz and 60 volts. A serviceman across the hall did something nasty to the transformer servicing the building when trying to re-route power for a remodeling job. Yes, they're the same ones who cut our power for 2 hours because 'We had UPSes, right?' [When you get to the machine room, power line monitors etc.] Don't make me laugh! Our machine room is a closet. (Serious! I'll take a picture sometime!) This is an ISP, not a national distribution center or something... Oh, and who uses 400hz for line frequency? I am officially here, by the way. CILCO is still yelling at A&B Construction (Or whomever they were...) and my boss wants to go help. The machines seemed to care more about halving the line voltage (Which I wasn't told about) than the frequency change... -------