If your oven suddenly won't heat up, before calling a serviceman or electrician, or purchasing a new element, it is wise to check the state of the clock timer. Most newer ovens with a digital clock won't work...
You need to be aware that different countries have different electrical standards.For example Most of Europe and Asia uses 220-240v at 50 Htz USA uses 110v at 60Htz There are many others so do some research...