Types A, B, & C
For release torques up to 5500Nm
Decide on manual or automatic reset.
Choose a position as near as possible to
the expected overload (see diagram).
Calculate the torque setting required at
that position. This can be determined
from the motor power, r.p.m. and gearing
ratio - the driven load - or from the
maximum permissible torque for drive
components such as crushing stress on
keys. It is the weakest component that
requires protection. Make allowance for
motor starting torques (generally twice
normal running torque).
Having calculated an approximate setting
for the release torque, final adjustments
can be made on site.
Check from tables that shaft, sprocket or
pulley, etc. can be accommodated.
