When is the five-year brake test conducted?

• A. In idle with no load
• B. At rated speed with rated load
• C. At double rated speed
• D. At minimum expected speed

Answer: (B)

The five-year brake test is performed at rated speed with rated load because this combination represents the conditions the brake must handle in normal service. Testing under full load while the escalator runs at its design speed checks that the brake can reliably stop and hold the car under the worst-case braking torque and heat that it will experience in operation. Testing at idle with no load wouldn’t stress the brake enough to reveal performance issues, testing at double the rated speed goes beyond the design limits and isn’t representative of normal use, and testing at minimum speed wouldn’t evaluate braking performance at the normal operating point. So, only at rated speed with rated load does the test properly verify the brake’s capability.