Caution – Toshiba VF-nC1 User Manual
Page 77
E6581090
F-13
6
Reduction in rated load current
When the PWM carrier frequency is set above 4kHz, the rated current needs to be decreased.
Carrier frequency
VFNC1S-
VFNC1-
Ambient
temperature
4kHz or less
8kHz
12kHz
16kHz
2001P
50°C or less
0.7A
0.7A
0.7A
0.7A
2002P
50°C or less
1.4A
1.4A
1.4A
1.4A
40°C or less
2.4A
2.4A
2.4A
2.4A
2004P
40 to 50°C
2.4A
2.4A
2.4A
2.2A
40°C or less
4A
4A
3.6A
3A
2007P
40 to 50°C
4A
3.6A
3.2A
2.8A
40°C or less
7.5A
7.5A
7.5A
7.1A
2015P
40 to 50°C
7.5A
7.5A
7.1A
6.3A
40°C or less
10.0A
9.5A
8.5A
7.5A
2022P
40 to 50°C
10.0A
8.5A
7.5A
6.5A
1001P
50°C or less
0.7A
0.7A
0.7A
0.7A
1002P
50°C or less
1.4A
1.4A
1.4A
1.4A
40°C or less
2.4A
2.4A
2.4A
2.4A
1004P
40 to 50°C
2.4A
2.4A
2.4A
2.2A
1007P
50°C or less
4A
4A
4A
4A
40°C or less
1.2A
1.2A
1.2A
1.2A
2002PL
40 to 50°C
1.1A
1.1A
1.1A
1.1A
40°C or less
2.3A
2.3A
2.3A
2.3A
2004PL
40 to 50°C
2.1A
2.1A
2.1A
2.1A
40°C or less
4A
3.6A
3.2A
2.8A
2007PL
40 to 50°C
3.6A
3.2A
2.9A
2.5A
40°C or less
7.5A
7.5A
7.5A
7.1A
2015PL
40 to 50°C
6.8A
6.8A
6.8A
6.4A
40°C or less
10.7A
10.1A
9.1A
8A
2022PL
40 to 50°C
9.6A
9.1A
8.2A
7.2A
• Function
Although the rated current at 4kHz is shown on the rating plate, the PWM carrier frequency is
set to 12kHz by default.
Note: In order to protect the inverter, PWM carrier frequency may fall automatically depending on
the circumstances even if it is under the derating in accordance with above table.
If using foot-mounted type noise reduction filter EMFAS2011Z or EMFA2006Z with VF-nC1, it
is necessary to decrease 5% more of rated current in above table.
6.10
Trip-less intensification
6.10.1 Auto-restart (restart during coasting)
H : Auto-restart control selection
Caution
Mandatory
• Stand clear of motors and mechanical equipment.
If the motor stops because of a momentary power failure, the equipment will start suddenly
when the power is restored, and could cause injury.
• To prevent accidents, attach labels warning that there is the risk of a sudden start in the event
of a power failure to all inverters, motors and machines.
• Function
This parameter detects the rotational speed and direction of rotation of the motor during coasting in the
event of a momentary power failure, and restarts the motor smoothly as soon as power is restored (motor
speed search function). Also, this parameter makes it possible to switch from commercial power operation to
inverter operation without stopping the motor.
During restart operation, the message “
TVT[
” is displayed.