Toshiba VF-nC1 Trip-less intensification, During restart operation, the message TVT is displayed

E6581090

Reduction in rated load current

When the PWM carrier frequency is set above 4kHz, the rated current needs to be decreased.

VFNC1S- Ambient VFNC1- temperature

2001P	50°C or less
2002P	50°C or less
2004P	40°C or less
	40 to 50°C
2007P	40°C or less
	40 to 50°C
2015P	40°C or less
	40 to 50°C
2022P	40°C or less
	40 to 50°C
1001P	50°C or less
1002P	50°C or less
1004P	40°C or less
	40 to 50°C
1007P	50°C or less
2002PL	40°C or less
	40 to 50°C
2004PL	40°C or less
	40 to 50°C
2007PL	40°C or less
	40 to 50°C
2015PL	40°C or less
	40 to 50°C
2022PL	40°C or less
	40 to 50°C

	Carrier frequency
4kHz or less	8kHz	12kHz	16kHz
0.7A	0.7A	0.7A	0.7A
1.4A	1.4A	1.4A	1.4A
2.4A	2.4A	2.4A	2.4A
2.4A	2.4A	2.4A	2.2A
4A	4A	3.6A	3A
4A	3.6A	3.2A	2.8A
7.5A	7.5A	7.5A	7.1A
7.5A	7.5A	7.1A	6.3A
10.0A	9.5A	8.5A	7.5A
10.0A	8.5A	7.5A	6.5A
0.7A	0.7A	0.7A	0.7A
1.4A	1.4A	1.4A	1.4A
2.4A	2.4A	2.4A	2.4A
				6
2.4A	2.4A	2.4A	2.2A
4A	4A	4A	4A
1.2A	1.2A	1.2A	1.2A
1.1A	1.1A	1.1A	1.1A
2.3A	2.3A	2.3A	2.3A
2.1A	2.1A	2.1A	2.1A
4A	3.6A	3.2A	2.8A
3.6A	3.2A	2.9A	2.5A
7.5A	7.5A	7.5A	7.1A
6.8A	6.8A	6.8A	6.4A
10.7A	10.1A	9.1A	8A
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.

6.10Trip-less intensification

6.10.1Auto-restart (restart during coasting)

H

: Auto-restart control selection

Caution

•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.

Mandatory • 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.

F-13