Toshiba S2E21 - Manual (Page 71)

TOSHIBA
21-6: Setting of the allowable motor locking time
Setting depends on the insulation class of the winding. See
Table 5 (Table Al).
21-T: Setting of the rated temperature rise
= 1.2
Under this condition, the operating point of OL is given by
1.1 x
22-2: Setting of the INST current
This function should be locked when a combination starter is
used as the motor starter.
When switchgear incorporating a circuit breaker is used as the
starter, the following characteristics should be coordinated
during the setting procedure:
Motor starting current
Motor inrush current
overcurrent relay characteristics
22-3: Setting of INST time
This is fixed at 0.05 s.
22-4: Setting of OC current
OC is not for the motor protection but for the protection of
equipment connected to the motor. OC is locked when the
equipment protection is not needed.
When OC is
set to 1.5 (times).
22-5: Setting of OC time
Set time to 0.3 s.
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23-2: Setting of unbalance factor
Set to 5%.
23-3: Setting of UC current
UC is not for the motor protection, but for preventing
underload or less of load condition.
When not necessary, it is locked.
When needed, set to 80
It is recommended however that you measure
the no-load current
and set the UC current to 1.2 x
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