Drive Motor Overload Protection - Omron J1000 User Manual

Drive Model
JZA
44P0
n Low Voltage Wiring for Control Circuit Terminals
Wire low voltage wires with NEC Class 1 circuit conductors. Refer to national state or local codes for wiring. Use a class
2 (UL regulations) power supply for the control circuit terminal.
Input / Output
Multi-function digital inputs
Main frequency reference
n Drive Short-Circuit Rating
This drive has undergone the UL short-circuit test, which certifies that during a short circuit in the power supply the current
flow will not rise above 30,000 amps maximum at 240 V for 200 V class drives and 480 V for 400 V class drives.
• The MCCB and breaker protection and fuse ratings shall be equal to or greater than the short-circuit tolerance of the
power supply being used.
• Suitable for use on a circuit capable of delivering not more than 30,000 RMS symmetrical amperes for 240 V in 200 V
class drives (up to 480 V for 400 V class drives) motor overload protection.
u

Drive Motor Overload Protection

Set parameter E2-01 (motor rated current) to the appropriate value to enable motor overload protection. The internal motor
overload protection is UL listed and in accordance with the NEC and CEC.
n E2-01 Motor Rated Current
Setting Range: Model Dependent
Default Setting: Model Dependent
Parameter E2-01 (motor rated current) protects the motor if parameter L1-01 is not set to 0 (default is 1, standard induction
motor protection enabled).
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
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" or "2") 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.
n L1-02 Motor Overload Protection Time
Setting Range: 0.1 to 5.0 Minutes
Factory Default: 1.0 Minutes
SIEP C710606 33A OYMC AC Drive – J1000 User Manual
Class T Fuses
Model Fuse Ampere Rating
A6T30
Table D.7 Control Circuit Terminal Power Supply
Terminal Signal
S1, S2, S3, S4, S5, SC
+V, A1, AC
Table D.8 Overload Protection Settings
Disabled
Std Fan Cooled (< 10:1 motor) (default setting)
Standard Blower Cooled (10:1 motor)
Model
30 CR6L-50/UL
Use the internal power supply of the drive. Use class 2
for external power supply.
Use the internal power supply of the drive. Use class 2
for external power supply.
Description
D.3 UL Standards
Class L Fuses
Fuse Ampere Rating
50
Power Supply Specifications
D
219