Detection Of Output Short Circuit; Overtorque Trip - Toshiba TOSVERT VF-AS1 Instruction Manual

6.33.9 Detection of output short circuit

 : Selection of short circuit detection at starting
• Function
Detects a short-circuit on the output side of the inverter.
Title
Selection of short circuit

detection at starting

Note: If the input voltage is rather high (480V as a guide) or the inverter is used to operate a high-speed motor, set
 to  or . Any other setting may cause the motor to malfunction, because a high-speed motor has a
very low impedance. If the inverter malfunctions for reasons of impedance even though  is set to  or ,
then set  to  or .

6.33.10 Overtorque trip

 : Overtorque trip selection
 : Overtorque detection level during power running
 : Overtorque detection level during regenerative braking
 : Overtorque detection time
 : Overtorque detection hysteresis
• Function
Trips the inverter or issues an alarm if the total time for which torque is above the level set with
/ reaches the time set with . Trip information is displayed as "."
= (No trip)
= (Tripping)
Title
 Overtorque trip selection
 Overtorque detection level during power running
 Overtorque detection level during regenerative braking
Overtorque detection time

 Overtorque detection hysteresis
Note:Using the output terminal function selection parameter, the inverter can be set so that it outputs overtorque
detection signals regardless of the setting of . ⇒ Refer to Section 7.2.2.
<Example of operation>
Output terminal function: 28 Overtorque detection
= (No trip)
Ex.) When outputting overtorque detection signals through output terminal OUT1
Title
 Output terminal function selection 1(OUT1)
Note:To put out signals to the terminal OUT2, select the parameter .
Function
:Each time (standard pulse)
:Only one time after power is turned on
:Each time (short pulse)
:Only one time after power is turn on (short pulse)
:Each time (Extremely shot-time pulse)
:Only one time after power is turn on (Extremely shot-
time pulse)
, , : Standard —— detecting at starting
, , : A check is made once at the first start of operation after the power is turned on or the
inverter is reset.
No tripping (FL is not active).
The inverter will trip (the failure signal FL will be activated) if a torque larger than
 (during power running) or  (during regeneration) passes for a time
longer than the time set with .
Function
Function
F-61
Adjustment range
Adjustment range
:No trip, :Trip
~ %
~ %
~ sec.
~ %
Adjustment range
~
E6581445
Default setting

6
Default setting





Example of setting
