YASKAWA CIMR-VU BA0001 Technical Manual page 480

D.3 UL and CSA Standards
If Auto-Tuning has been performed successfully, the motor data that was entered in T1-04 is automatically written into
parameter E2-01. If Auto-Tuning has not been performed, manually enter the correct motor rated current in parameter E2-01.
n L1-01: Motor Overload Protection Selection
The drive 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.
Setting
0
1
2
3
4
6
Disable the electronic overload protection (L1-01 = 0: Disabled) and wire each motor with its own motor thermal overload
when connecting the drive to more than one motor for simultaneous operation.
Enable the motor overload protection (L1-01 = "1", "2", or "3") when connecting the drive to a single motor unless there is
another means of preventing motor thermal overload. The electronic thermal overload function causes an oL1 fault, which
shuts off the output of the drive and prevents additional overheating of the motor. The motor temperature is continually
calculated as long as the drive is powered up.
Setting L1-01 = 1 selects a motor with limited cooling capability below rated (base) speed when running at 100% load. The
oL1 function derates the motor when it is running below base speed.
Setting L1-01 = 2 selects a motor capable of cooling itself over a 10:1 speed range when running at 100% load. The oL1
function derates the motor when it is running at 1/10 or less of its rated speed.
Setting L1-01 = 3 selects a motor capable of cooling itself at any speed — including zero speed — when running at 100%
load. The oL1 function does not derate the motor at any speed.
Setting L1-01 = 4 selects protection for a PM motor with variable torque.
n L1-02: Motor Overload Protection Time
Setting Range: 0.1 to 5.0 Minutes
Factory Default: 1.0 Minutes
The L1-02 parameter sets the allowed operation time before the oL1 fault occurs when the drive is running at 60 Hz and 150%
of the full load amp rating (E2-01) of the motor. Adjusting the value of L1-02 can shift the set of oL1 curves up the Y-axis of
the diagram below but will not change the shape of the curves.
480
Table D.12 Overload Protection Settings
Disabled
Standard Fan-Cooled Motor (Default)
Drive Duty Motor with a Speed Range of 1:10
Vector Motor with a Speed Range of 1:100
Permanent Magnet Motor with Variable Torque
Standard Fan-Cooled Motor (50 Hz)
Operation time (minutes)
10
7
3
1
0.4
0.1
0 100
Figure D.10 Motor Overload Protection Time
Description
Cold start
(characteristics when an
overload occurs at a
complete stop)
Hot start
(characteristics when an
overload occurs during
continuous operation at 100%)
Motor current (%)
150 200
E2-01 = 100% motor current
YASKAWA ELECTRIC SIEP C710606 18F YASKAWA AC Drive – V1000 Technical Manual