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Application for motor protection
2.1.5
As the function of motor protection (MOT) will be provided independently (see Chapter 2.28),
the user can have the motor protection using the OC function. The OC element can have relay
calculation at the particular period, the timing of which can be selected from 'Stop status',
'Start-up status', and 'Running status' of the motor. The user can set it arbitrary with settings
[OC*-Act-Stop], [OC*-Act-Start], [OC*-Act-Run]. Table 2.1-5 shows there are relay settings in
respective OC elements, which can be mentioned with asterisk(*: 1 to 4).
When Off is set for all settings [OC*-Act-Stop], [OC*-Act-Start], [OC*-Act-Run], the
calculations of OC elements become normal relays. The OC elements will not have the motor
protection.
Setting items
[OC*-Act-Stop]
[OC*-Act-Start]
[OC*-Act-Run]
†Note: For motor conditions corresponding the statues, see Table 2.28-3 for more details.
Table 2.1-5 OC settings for motor protection
Switch
Unit
Off
–
On
Off
–
On
Off
–
On
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Contents
Disabling OC element calculation when
motor status is in stop status†
Enabling OC element calculation when
motor status is in stop status
Disabling OC element calculation when
motor status is in start-up status†
Enabling OC element calculation when
motor status is in start-up status
Disabling OC element calculation when
motor status is in running status†
Enabling OC element calculation when
motor status is in running status
6F2T0207 (0.01)
Default
Off
Off
Off
GRE200 (5,6)
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