Protection Parameters; Motor Overload - Magnetek Impulse G+ series 4 Instruction Manual

Protection Parameters

• L1 Motor Overload
• L2 Power Loss Ride Thru
• L3 Stall Prevention
• L4 Reference Detection
• L5 Test Mode
• L6 Torque Detection
• L8 Hardware Protection
• L9 Automatic Fault Reset
• L9 Fault Latch

Motor Overload

The IMPULSE
protecting the motor from overheating. The drive bases the protection on time, output current, and
output frequency. The electronic thermal overload function is UL-recognized, so an external thermal
overload relay is not required for single motor operation.
This parameter selects the motor overload curve used according to the type of motor applied.
Setting L01-01 = 1 selects a motor with limited cooling capability below rated (base) speed when
running at 100% load. The OL1 function derates the motor any time it is running below base speed.
Setting L01-01 = 2 selects a motor capable of cooling itself at any speed when running at 100% load.
The OL1 function derates the motor when it is running at 1/10 of its rated speed or less.
Setting L01-01 = 3 selects a motor capable of cooling itself at any speed when running at 100% load.
This includes zero speed. The OL1 function does not derate the motor at any speed.
If the drive is connected to a single motor, the motor overload protection should be enabled
(L01-01 = 1, 2, 3) unless another means of preventing motor thermal overload is provided. When the
electronic thermal overload function is activated, an OL1 fault occurs, shutting OFF the drive's
output, thus preventing additional overheating of the motor. The motor temperature is continuously
calculated as long as the drive is powered up.
When operating several motors with one drive, install a thermal relay on each motor and disable the
motor overload protection (L01-01 = 0).
Parameter
L01-01
L01-02
®
•G+ and VG+ Series 4 drive has an electronic overload protection function (OL1) for
Table 5-87: Motor Overload Parameter Settings
Display
Mtr OL Charact
0 OL1 Disabled
1 VT Motor
2 CT Motor
3 Vector Motor
MOL Time Const
Function
Sets the type of motor overload
protection.
General purpose motor (standard
fan cooled)
Drive dedicated motor with a
speed range of 1:10
Speed range of 1:100
Time for OL1 fault when motor
current is 150% of the motor
rated current.
IMPULSE®•G+ & VG+ Series 4 Instruction Manual – February 2017
Range Default
0-3 3
0.1–5.0 min 1.0
5-105