NIetz Electric Co.,Ltd
Soft starter SSN/SSA serie User Manual
24
on the keyboard, and the protection functions are all on.
3-- when the bypass is on, SCR trigger is closed. The running current doesn’t show
on the keyboard, and the protection functions are all off.
The default value is 2.
Ab8888
Starting overload level
There are 8 levels. The protection time of every level is different. The relation
between overload multiples and protection operation time shows in chapter12.2. The
default value is 4（corresponding to IEC60947-4-2 standard 15 class）。
Note: The overload protection is inverse time after the bypass contactor is on. It
isn’t selected. For detail see chapter 12.2.
Ac8888
over current protection during running
This protection function will put into work as soon as the instant current is
big. The default value is 200%. It means the protection value is twice as the rate
current。
Ad8888
Stopping mode
There are two stopping mode: soft stop and free stop. The default value is 1-free
stop. The soft stop function is for ”water hammer”.The Free stop is set as normal.
For detail see chapter 6.4。
Ar8888
Soft stop factor
This parameter is valid only when the stopping mode is free stop. It decide the
time and effect of the soft stop. The smooth stop effect will be gained if this
parameter is set correct
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