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3-2 Overload Characteristics (Electronic Thermal Function)
OMNUC G5-SERIES AC SERVOMOTOR AND SERVO DRIVE USER'S MANUAL
3
Specifications
3-2 Overload Characteristics (Electronic Thermal Function)
An overload protection function (electronic thermal) is built into the Servo Drive to protect the
Servo Drive and motor from overloading.
If an overload does occur, first eliminate the cause of the overload and then wait at least 1
minute for the motor temperature to drop before turning ON the power again.
If the alarm reset is repeated at short intervals, the motor windings may burn out.
Overload Characteristics Graphs
The following graphs show the characteristics of the load ratio and electronic thermal function's
operation time.
100
0.1
1
10
100
150 200 250 300
Overload [%]
115
Time [s]
50 W
100 W (100 V)
100 W (200 V)
200 W
400 W
750 W
3,000-r/min Servomotors
[100 V, 200 V]
100
115
0.1
1
10
100
150 200 250 300 Overload [%]
[200 V]
3,000-r/min Servomotors 1.0 kW to 5 kW
2,000-r/min Servomotors
1,500-r/min Servomotors
1,000-r/min Servomotors
[400 V]
3,000-r/min Servomotors
2,000-r/min Servomotors
1,500-r/min Servomotors
1,000-r/min Servomotors