TECO-Westinghouse A510, Инструкция по эксплуатации

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B-7
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08-05 Motor Overload Protection Selection
The inverter has an electronic overload protection function (OL1) based on time, output current, and output
frequency, which protects the motor from overheating. The electronic thermal overload function is
UL-recognized, so it does not require an external thermal overload relay for single motor operation.
This parameter selects the motor overload curve used according to the type of motor applied.
08-05 Selection for motor overload protection (OL1)
Range
xxx0b: Motor overload is invalid
xxx1b: Motor overload is valid
xx0xb: Cold start of motor overload
xx1xb: Hot start of motor overload
x0xxb: Standard motor
x1xxb: Special motor
0xxxb: Reserved
1xxxb: Reserved
Sets the motor overload protection function in 08-05 according to the applicable motor.
08-05 = ---OB: Disables the motor overload protection function when two or more motors are connected to
a single inverter. Use an alternative method to provide separate overload protection for each motor such
as connecting a thermal overload relay to 1he power line of each motor.
08-05 = --1-B: The motor overload protection function should be set to hot start protection characteristic
curve when the power supply is turned on and off frequently, because the thermal values are reset each
time when the power is turned off.
08-05 = -0
—B:
For motors without a forced cooling fan (general purpose standard motor), the heat
dissipation capability is lower when in low speed operation.
08-05 = -1
—B:
For motors with a forced cooling fan (inverter duty or VIF motor), the heat dissipation
capability is not dependent upon the rotating speed.
To protect the motor from overload by using electronic overload protection, be sure to set parameter 02-01
according to the rated current value shown on the motor nameplate.
Refer to the following "Motor Overload Protection Time" for the standard motor overload protection curve
example: Setting 08-05 = -0--B.