Amtech Axpert-Eazy AMT-011-4, Инструкция по эксплуатации

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Axpert-Eazy AC Variable Frequency Drive
6-65
6
Note: In pump applications, if the flow decreases below a minimum speed there will be cavitations. This feature
becomes useful to turn off the pump in such case.
B305: Overload Setting (%)
This is reference for the inverse time overload characteristics. Changing this parameter can change
the inverse time overload characteristics in cold and hot start, adjusted as per the heat sink
temperature. The cold start means the heat sink temperature is less than 50 degree C.
The setting uses motor rated current as 100%.
Over load for hot start is 150% for 60 seconds inverse time characteristics. Note that if 155% of the
rated current is exceeded, a trip will occur at the 160% for 10 seconds and at 170% for 4 seconds.
Overload curves for cold start is adjusted as per the heat sink temperature. In case of ND, in cold start
120% overload will be available for 90 seconds instead of 60 seconds. In case of HD, in cold start
150% overload will be available for 90 seconds instead of 60 seconds.
B306: Earth (Ground) Fault Detection Level (%)
This parameter sets the earth (ground) fault detection level. When the vector sum of all the 3-phase
current is more than the set limit, the unit will trip in earth (ground) fault. Set to zero to disable the
earth (ground) fault protection.
Note:
The internal earth (ground) fault protection function is to protect the unit against earth (ground) faults in the
motor and the motor cable. This is not a personal safety or a fire protection feature. The earth (ground) fault
protective function can be disabled setting B306 to zero.
B307: DC Bus voltage Control
When enabled, it will prevent the over voltage during RUN condition. Refer below figure for the
functioning of dc bus voltage control. The deceleration will cease, if dc bus voltage is >740V. It will
resume only after the dc bus voltage reduces to 710V (30V hysteresis). In this case actual
deceleration time will be more than the programmed deceleration time. The dc bus regulation level for
500V series is 875Vdc and 1050Vdc for 600V series. Use B317 gain parameter to increase DC bus
voltage control response.
F
Vdc
Output freq.
(M101)
740Vdc
t
t
M105
B307= 2 or 3
30V hysteresis
B308: Reverse Direction Lock
Set this to prevent unintentional reverse direction operation. When enabled it will prevent the unit to
start in reverse direction. This parameter cannot be changed during running condition.
Note:
If reverse direction is locked and run command is given with reverse direction selection, the unit will not
start in reverse direction.
B309: Change Password