asynchronous device
1.Design and implementation of ATM(Asynchronous Transfer Mode) NIC(Network Interface Card) device driver based on RTEMS(Real Time Executive for Multiprocessor Systems) were discussed.
2.The device can protect start-up status and running status of asynchronous motors by differential protection, over current protection, negative-sequence current protection, zero-sequence current protection, inverse time current protection, under-voltage protection and so on, can measure every kind of electricity, and can process the function of telecontrol, telemetering and telecommunication.

