Hitachi S1 Series Basic Manual page 148

S1 series standard inverter
Function
Name
code
Overvoltage stall
P11.03
protection
Overvoltage stall
P11.04
protection voltage
Current-limit
P11.05
selection
Automatic
P11.06
current-limit level
Frequency-drop
P11.07 rate during
current limit
Detailed parameter description
2. Prohibit the input phase loss protection to
enable this function.
0: Disable
1: Enable
DC bus voltage V
Overvoltage stall
threshold
Output
frequency
120–150% (standard bus voltage) (400V)
120–150% (standard bus voltage) (230V)
During accelerated running, as the load is too
large, the actual acceleration rate of motor is
lower than that of output frequency, if no
measures are taken, the inverter may trip due to
overcurrent during acceleration.
0x00–0x11
Ones: Current-limit action selection
0: Invalid
1: Always valid
Tens: Hardware current-limit overload alarm
selection
0: Valid
1: Invalid
Current-limit protection function detects output
current during running, and compares it with the
current-limit level defined by P11.06, if it exceeds
the current-limit level, the inverter will run at stable
frequency during accelerated running, or run in
decreased frequency
running; if it exceeds the current-limit level
continuously, the inverter output frequency will
drop continuously until reaching lower limit
frequency. When the output current is detected to
be lower than the current-limit level again, it will
-143-
Time t
Time t
during constant-speed
Default
Modify
value
○
1
136%
○
120%
◎
01
G model:
160.0%
◎
P model:
120.0%
10.00
◎
Hz/s