Action At Low Currents; Detection Of Output Phase Failure; Over-Torque Trip - Toshiba TOSVERT VF-A7 Instruction Manual

6.25.7 Action at low currents




Function
If the current is lower than
inverter trips. When
, the time elapsed before the inverter trips after the detection of a small current.

  Disabled
  Enabled
Title
Low-current trip

Low-current detection level

Low-current detection time


6.25.8 Detection of output phase failure



Function
The function is to detect short circuits with inverter's output terminals.
Title
Detection of output short-

circuit during start-up
Adjustment of detection pulse

for output short-circuit during
start-up


Note) Shorten the pulse length if the motor trips in error (OCL) at start-up, especially a high-speed motor.

6.25.9 Over-torque trip





Function
If a torque current exceeding the current set with
trips and the trip message
Low-current trip
Low-current detection level
Low-current detection time

is set at (tripping disabled), it is necessary to set, with

not trip(FL is not active)
Low-current alarm can be output by output terminal selection.
The inverter trips if low-current passes during operation for
Function
Detection of output short-circuit during start-up
Adjustment of detection pulse for output short-circuit during start-up
Function
: Standard

A check is made once at the first start of operation after the power is turned on or
the inverter is reset.
Set the pulse length for the detection of short circuits.
Over-torque trip
Over-torque detection level during power running
Over-torque detection level during regeneration
Over-torque detection time

F-59
level and passes for a time longer than
the time set with

Adjustment range
: Disabled, : Enabled
  [%]
  [s]
Adjustment range
: Standard
: Only one time at power injection or at
first start after reset
  [ s]
detecting at starting
, 
is displayed.

or over.(FL is active)
Default setting
Default setting
is detected, the inverter
, the




