YASKAWA OYMC V1000, Programming Manual

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YASKAWA ELECTRIC SIEP C710606 10A YASKAWA AC Drive - V1000 PRELIM. Programming Manual 185
1.8 L: Protection Functions
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1.8 L: Protection Functions
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L1: Motor Protection Functions
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L1-01: Motor Overload Protection Function Selection
The drive has an electronic overload protection function that estimates the motor overload
level based on output current, output frequency, thermal motor characteristics, and time. An
OL1 fault will be triggered when motor overload is detected.
L1-01 sets the overload protection characteristics function according to the motor being
used.
Note: When the motor protection function is enabled (L1-01 is not set to zero), an OL1 alarm can be
output through one of the multi-function outputs by setting H2-01 to 1F. The output will close
when the motor overload level reaches 90% of the OL1 detection level.
Setting 0: Disabled - Motor Overload Protection is not Provided
This setting should be used if no motor overheat protection is desired or if multiple motors
are connected to one drive. In this case it is recommended that you install a thermal relay for
each motor as show in
Figure 1.73
Figure 1.73
Figure 1.73 Example of Protection Circuit Design for Multiple Motors
No. Name Setting Range Default
L1-01 Motor Overload Protection Selection 0 to 4
A1-02
dependent
Drive
Power
supply
M1
MC1
MC1, MC2: Magnetic contactors
L10, L20: Thermal relays
L10
MC2 L20
M2