YASKAWA V1000 Series Installation & Start-Up Manual page 156

4.4 Basic Parameter Adjustments
Electronic Thermal Motor Protection
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The drive has built-in electronic thermal overload protection to detect overload
conditions. This protection meets standards set by UL and cUL for motor thermal
overload protection. The protective feature is activated when the output current
rises above the motor rated current for a specified time. This speed sensitive
protective feature interrupts the motor current to protect the motor wiring and
windings in the event of overload, eliminating the need for an external overload
device. When multiple motors are used with a single drive, separate overload
devices are required to properly protect the individual motor branches.
Related Parameters
Parameter
No.
Name
Motor Sets the motor nameplate full load current
E2-01 Rated in amperes (A). This value is
Current automatically set during Auto-Tuning.
Motor 2 Sets the motor 2 name plate full load
E4-01 Rated current in amperes (A). This value is
Current automatically set during Auto-Tuning.
Sets the motor thermal overload
protection (OL1) based on the cooling
capacity of the motor.
Motor 0: Disabled
Overload 1: Standard Fan Cooled (< 2:1 motor)
L1-01
Protection 2: Standard Blower Cooled (≥ 10:1 motor)
Selection 3: Vector Motor (1000:1 motor)
4: Motor protection for a PM motor with
rated torque
5: Motor protection for PM rated torque
Sets the motor thermal overload
protection (OL1) time. A larger L1-02
Motor
time will increase the time before an OL1
Overload
L1-02 fault will occur.
Protection
This setting rarely needs to be changed.
Time
Should be set in accordance with the
overload tolerance of the motor.
Digital Outputs (H2-01 through H2-03)
Setting
Motor Overload
1F
OL1 Alarm Warning (including OH3)
156
YASKAWA TM.V1000.01 V1000 Drive Installation & Start-Up Manual (Preliminary 01-19-07)
Description
Function
Setting Range
10 to 200% of
drive rated current
10 to 200% of
drive rated current
0 to 5
0.1 to 5.0
Description
Closed = When OL1 function is at 90% of its trip
point or greater.
Default Setting Page
Determined by
358
o2-04
Determined by
361
o2-04
1 382
1.0 min 382
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