-._. . . . ..- -.,...... ^.l_l-- -,__,__-. _1 ,--,- ,,, ,,.--. +
.- ” .i< _... * ._._” _-____
Function
Description
As soon as regenerative energy has
reduced, this function decreases frequency
again to allow deceleration to continue.
Remarks
Overcurrent
shutoff
(OCl)
(OC2)
(OC3)
When 200% or more of the inverter
The most possible
rated output current flows, this protective
causes of overcurrent
function is activated to stop the inverter. shutoff include invertel
output short-circuit,
ground fault, excessivt
load inertia (GD’) ,
extremely short setting
of acceleration/
deceleration time,
start during motor
coasting, start of
special motor or
motor of capacity
larger than inverter
rating.
Restart after
examinating and
removing the cause.
Regenerative
overvoltage
shutoff :
(OVT)
When converter output voltage becomes
This function is
excessive, ‘due to regenerative energy from
activated mainly due
the motor, this protective function is
to short deceleration
activated to stop and hold transistor
time or negative
base current off.
load.
-ai-
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