What is the main function of a relay in elevator control systems?
Correct!
Wrong!
Relays act as electrically operated switches that control circuits using low voltage signals.
Which type of motor is commonly used in modern traction elevator systems?
Correct!
Wrong!
AC gearless permanent magnet motors are widely used for their energy efficiency and smooth operation.
What is the purpose of a limit switch in elevator systems?
Correct!
Wrong!
Limit switches prevent the elevator from moving beyond safe boundaries by cutting off power when limits are reached.
Which component converts AC to DC for elevator control circuits?
Correct!
Wrong!
Rectifiers are used to convert alternating current (AC) to direct current (DC) for elevator control components.
What safety component cuts off power during an elevator malfunction?
Correct!
Wrong!
A circuit breaker or main disconnect switch is designed to interrupt power during overload or faults to protect the system.
Which device is used in elevator systems for variable speed control of motors?
Correct!
Wrong!
A variable frequency drive (VFD) regulates the speed and torque of elevator motors for efficient operation.