Toshiba VF-A7 Setting the electronic thermal protective function, Manual boost  ～ %, 

5.12 Manual torque boost - Increasing the torque produced at low speeds



：Manual torque boost

･Function

When the torque produced in low speed ranges is not large enough, it can be boosted up by increasing the torque boost rate with this parameter.

Base-frequency voltage



Output voltage [Ｖ]



				Output frequency [Hz]
		Base frequency
[Parameter]			
Title	Function	Adjustment range		Default setting
	Manual boost	～ [%]		Model dependent

★This parameter is valid when  = (V/f constant), (square reduction torque) or (V/f 5-points setting).

Note 1) Torque boost rate has been set optimally according to the inverter capacity. Do not set the torque boost rate too high, or the inverter may trip during start-up because of an over-current. When needs to be changed, be careful not to increase more than +/-2% of the default value.

5.13 Setting the electronic thermal protective function

 ：Selection of electronic thermal protection characteristics

 ：Motor overload protection level #1

 ：Overload reduction start-up frequency

 ：Motor 150%-overload time limit

･Function

These parameters are used to set the electronic thermal protective function according to the rating and characteristic of the motor to be controlled.

■Parameter setting

Title

Function

Adjustment range

Default setting



Selection of electronic thermal protection characteristics

Setting	Kind of	Overload		Overload stall
	motor	protection
	Standard	protect		not stall
		protect		stall
	motor	not	protect	not stall	
		not	protect	stall
	VF motor	protect		not stall
		protect		stall
	(special
		not	protect	not stall
	motor)
		not	protect	stall



Motor overload protection level #1

～ [%]



E-24