Hitachi P1

Page 36
OVER-SPEED (CLV)
The over-speed error detection function judges that the speed is excessive if the feedback speed exceeds the over-speed
-08] Detected
 When the speed has exceeded [bb-80] Over-speed error detection level and [bb-81] Over-speed error
detection time has elapsed, it is judged as an over-speed error. When an over-speed error occurs, the inverter trips with
[E107] Over-speed error.
Function
Parameter
Example Value
Over-speed error detection level setting
bb-80 
Over-speed error detection time
bb-81 0.5 sec
CARRIER FREQUENCY

changed using the [bb101] setting. It is also effective in avoiding resonance of mechanical systems and motors.
area sensorless vector
control (09), or vector control with encoder (10) 
NOTE – -rated due to thermal increase on the output
trrect for
the leakage current.
Function
Parameter
Example Value

bb101 5.0 kHz
GROUND FAULT PROTECTION
This is a function to protect the inverter by the detection of ground faults between the inverter output and the motor at power-on.
The function doesn’t work when there is a voltage induced in the motor due to idling or when the inverter trips.
Function
Parameter
Example Value
Ground fault protection
bb-64
0 = disabled
1 = enabled