What do you need to operate an electronic clock which is AC 120V 60Hz 95Ma to run in 240v 50hz outlet?

Answer 1

If you have a 120v 60Hz clock it needs 120v 60Hz to work properly.

If you try to use on a 240v 50Hz supply, you'll need a transformer to change the line voltage to 120v. As there is no inexpensive reliable way to change the Hz, or AC cycles, it will run on 50Hz, and will lose 10 seconds every minute, which is 600 seconds (10 minutes) every hour, or 4 hours every day.

An AC clock uses a synchronous motor, which turns the clock's hands through a gear train. Electromagnets in the motor create a rotating magnetic field to turn its rotor. The rotation rate of the motor shaft is synchronized to the utility frequency; 60 cycles per second (Hz) in North and South America, 50 cycles per second in most other countries.

The gear train scales this rotation so the minute hand rotates once every hour. A synchronous clock can be looked at as a mechanical counter, whose hands display a running count of the number of cycles of alternating current.