Toshiba VF-nC1 instruction manual Undervoltage trip  Under voltage trip selection

E6581090

<Example of operation>

1)If function 12 (OT: over-torque detection) is assigned to the FM/OUT terminal, using the output terminal selection parameter H

H (FM/OUT terminal selection 1): 12 (OT: over-torque detection)

Over-torque- detection signal P15-FM/OUT

H

＊H-10%

Torque current (%)

ＯFF ON OFF

Less than	H
H-set value

6

Time (sec)

*The VF-nC1 inverter has 10% of hysteresis to prevent the occurrence of over-torque hunting. Therefore, the over-torque signal is turned off at a level lower than the setting of H by 10% (hysteresis).

6.14.8Undervoltage trip

H : Under voltage trip selection

• Function

This parameter is used to select the control mode activated when an undervoltage is detected. The error message “WR” will be displayed if the inverter trips because of an undervoltage.

H＝ : Disabled ････The inverter shuts down but not trip. (FL relay not activated) The inverter shuts down if the voltage drops below 64% of the rated voltage.

H＝ : Enabled ･････The inverter shuts down. It trips if the voltage drops below 64% of

the rated voltage. (FL relay activated)

H＝ : Disabled ････The inverter shuts down but not trip. (FL relay not activated) The inverter shuts down if the voltage drops below 50% of the rated voltage. When setting H to , be sure to install the input reactor of an option.

Title	Function	Adjustment range	Default setting
		0: Disabled
	Under voltage trip	1: Enabled (shutdown below 64%,
H		FL relay activated)	0
	selection
		2: Disabled (shutdown below 50%,
		FL relay not activated)

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