Toshiba TOSVERT VF-AS3 Instruction Manual page 183

Title Parameter name
F631 Inverter overload
detection
Set <F631: Inverter overload detection> to "1: Temperature estimation".
• If the inverter overload trip "OL1" occurs, you can clear it by decreasing the value of <F601: Stall
prevention level 1> or setting <ACC: Acceleration time 1> or <dEC: Deceleration time 1> to a
longer value.
• To protect the inverter unit, you cannot turn off inverter overload detection.
0: 150%-60s (HD rating) or 0: 120％-60s (ND rating)
The inverter is protected with the uniform overload curve of 150%-60s (120%-60s for ND rating),
regardless of temperature.
Inverter overload protection characteristics
Inverter overload time(s)
60
0
105％
1: Temperature estimation
Estimate inverter internal temperature rise and automatically adjust overload protection
characteristics (the diagonally shaded area in the following figure).
Inverter overload protection characteristics
Inverter overload time (s)
60
• When the output frequency is 0.1 Hz or less, or when the output current is 150% or more, the
overload trip "OL1" or overcurrent trips "OC1 through OC3" may occur in shorter time to protect
the inverter.
HD
0: 150%-60s
1: Temperature estimation
ND
0: 120%-60s
1: Temperature estimation
Monitored output current (%)
110 150
120
100%: Inverter rated output current
(ND) (ND)
<F631>=0
0 110 150
105％ 120
(ND) (ND)
5-17
Adjustment range
Inverter overload time (s)
Current (%)
(Outline data)
111
120
130
140
150
165
200
Monitored output current (%)
100%: Inverter rated output current
5. [Fundamental operation] How to use parameters
E6582062
Default setting
10
2400
240
120
80
60
2
0.5
3
4
5
9