GK600 User Manual
Chapter 6 Specification of Parameters
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d0-24
Overload protection
detection time of motor 1
Range: 0.1min~15.0min
Factory default:
5.0min
When d0-23 is set to "1: judged by motor current", overload protection time is determined by
this parameter on the basis of the run current being 150% of motor rated current. An alarm of
motor overload fault "oL2" shall be displayed once the lasting time exceeds this parameter
value. Protection time when the run current is other value is automatically calculated according
to inverse time lag characteristic curve. See Fig. 6-39.
Fig. 6-39 Motor protection curve for ordinary motor running at 50Hz
Overload protection is performed for variable frequency motor according to the curve as shown
in Fig. 6-39 at either high or low rotation speed. Due to the fact that fan-based heat dissipation
of ordinary motors become poor at low speed, the protection is derated at low speed.
Example:
when d0-24 is set to 10.0 minutes, and the motor is running at 10Hz input, motor
overload fault "oL2" shall be displayed when the running current is 150% of the motor rated
current with lasting time 4 minutes. See Fig. 6-40.
Fig. 6-40 Overload protection curve for ordinary motor running at 10Hz
1
5
10
100%
150%
200%
(d0-24) =10
分钟
0
(d0-24) =5
分钟
(d0-24) =1
分钟
电机电流
电机过载时间
4.0
100%
150%
200%
0
电机电流
电机过载时间
(d0-24) =10
分钟
Motor overload time
(d0-24) = 10 minutes
(d0-24) = 5 minutes
(d0-24) = 1 minutes
Motor current
Motor overload time
(d0-24) = 10 minutes
Motor current
