18.8 The following categories of tools incorporating induction motors and:
a) with a starting torque less than the full-load torque; or
b) started by hand; or
c) provided with moving parts which are liable to be jammed, or where the moving parts can be
stopped by hand, the motor remaining switched on during this operation;
are connected, starting from cold, to their rated voltage or the upper limit of their rated voltage
range with the moving parts locked
• for 30 s for tools that are operated by hand during use;
• for 5 min for tools that are attended during use.
At the end of the test period specified, or at the instant of operation of fuses, thermal cut-outs, motor
protection devices, and the like, the temperature of the windings shall not exceed the values shown in
Table 3.
18.9 Tools incorporating three-phase motors are operated, starting from cold,
• for 30 s, if they are kept switched on by hand or continuously loaded by hand;
• or otherwise, for 5 min,
with one phase disconnected, and under the torque producing normal load.
At the end of the test period specified, or at the instant of operation of fuses, thermal cut-outs, motor
protection devices, and the like, the temperature of the windings shall not exceed the values shown in
Table 3.
Table 3 – Maximum winding temperature
Protection of
windings
Limiting temperature
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