protective device + generator

The fundamental relationship between the frequency of the alternating current (f), the number of magnetic poles (p) and the speed of the rotor (n) is: f=

The correct translation of "ring gate" is:

• zawór pierścieniowy

• pierścień zaworowy

• pierścień bramkowy

• bramka pierścionkowa

Usuall frequency of generator

• 50

• 50 Hz

• 120

If the currents in the live and neutralwires are ... , there is imbalance in magnetic field and relay breaks the circuit.

The schemat of which device is it?

• RCD

• LCD

• fuse

• circuit breaker

• transformer

The generator is a rotating machine which converts ​... energy to​ ... energy.