TOSHIBA
6F9EOlll
21-6: Setting of the allowable motor locking time
'(6SMj
Setting depends on the insulation class of the winding.
See
Table 5 (Table Al).
21-T: Setting of the rated temperature rise
(6'SN)
OSN
=
6SM
f
1.2
(C)
Under this condition, the operating point of OL is given by
1.1 x
IrnFLC
(
22-2: Setting of the INST current
(I>>)
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
-
Suitchgear!~
overcurrent relay characteristics
22-3: Setting of INST time
CT>))
This is fixed at 0.05 s.
22-4: Setting of OC current
(10~)
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
equired.
set to 1.5 (times).
22-5: Setting of OC time
(Tot)
Set Oc time to 0.3 s.
--
--
23-2: Setting of unbalance factor
OJB)
Set UB to 5%.
23-3: Setting of UC current
(1"~)
UC is not for the motor protection, but for preventing
:an
underload or less of load condition.
When not necessary, it is locked.
When needed, set to 80
(%).
It is recommended however that you measure
n
51
the no-load current
INK
and set the UC current to 1.2 x
INLC.
!
>
-- 118
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