The statement 'A relay selector is commonly used on high-speed high-rise traction elevators' is true or false?

The statement 'A relay selector is commonly used on high-speed high-rise traction elevators' is true or false?

• A. True
• B. False
• C. Not Sure
• D. Not Applicable

Answer: (B)

High-speed high-rise traction elevators are controlled with modern electronic systems that use microprocessor-based controllers, solid-state relays, and drive technology to provide precise speed control, soft-start, braking, and robust safety interlocks. A relay selector is an electromechanical device that steps through a sequence of relays to choose a control path. While it served older, simpler systems, it isn’t suited for the demands of tall, fast elevators: it’s slower to respond, bulky due to many relays, and subject to mechanical wear and contact failures. Modern traction controls rely on solid-state logic and variable frequency drives to achieve reliable, rapid, and fault-tolerant operation. So the statement is false.

High-speed high-rise traction elevators are controlled with modern electronic systems that use microprocessor-based controllers, solid-state relays, and drive technology to provide precise speed control, soft-start, braking, and robust safety interlocks. A relay selector is an electromechanical device that steps through a sequence of relays to choose a control path. While it served older, simpler systems, it isn’t suited for the demands of tall, fast elevators: it’s slower to respond, bulky due to many relays, and subject to mechanical wear and contact failures. Modern traction controls rely on solid-state logic and variable frequency drives to achieve reliable, rapid, and fault-tolerant operation. So the statement is false.