SANYU SSXA Series User Manual page 22

SANYU
current limit value. This parameter should be set to lass than the ramp time.
Generally it is set to 10S. It can be increased appropriately with the increase of
power. If this parameter is set too large, the system will stop due to overheating
protection. So it needs to be adjusted according to the actual state.
Start/stop
The range of this parameter is 400~600%Ie. This parameter is set for the protect
function aimed at the big current at the starting process. The default value is 400%.
Current
This parameter should be increased when the inertial of the load is bigger。
protect
Current
This parameter is set for the protect function aimed at that the difference of
3 phases current is bigger at running. The default value is 30%.The smaller this
unbalance
parameter is, the more the sensitivity is. This parameter should not be too small,
factor
in order to avoid the protection is too sensitive to influence the normal operation
of the equipment.
Note: This protect function is active only when the average current is bigger than
The calculation of the current unbalance factor
current unbalance factor △I％ = （Imax-Imin）/Iaver
Iaver＝（Ia＋Ib＋Ic）/3
Modifying this parameter, user can change between the keyboard, terminal and
Control Mode
PC easily. The default is 1. It means the keyboard control. If it is set 2, it means
the terminal control. If it is set 3, it means the terminal control and keyboard
control are all available，If it is set 4, communicate，If it is set 5, keyboard
and communicate are all available，If it is set 6, terminal and communicate are
available, If it is set7, keyboard, terminal and communicate are all available.
Note: If it is set 3、6 or 7, the keyboard and communicate are invalid . If two-line
way is used, user can set this parameter by keyboard referring to chapter 8-1 and
chapter 9.5.
The operation mode of SCR is decided by it after the bypass contactor is closed.
SCR trigger
1—when the bypass is closed, SCR trigger is blocked. The running current shows on
select
the keyboard and the protection functions are all on.
2-- When the bypass is closed, SCR trigger is not blocked. The running current shows
on the keyboard and the protection functions are all on.
There are 8 levels. The protection time of every level is different. The relation
Starting
between overload multiples and protection operation time shows in chapter12.2. The
overload
default value is 4（corresponding to IEC60947-4-2 standard 15 class）。
level
Note: The overload protection is inverse time after the bypass contactor is on. It
isn't selected. For detail see chapter 12.2.
the 20% of the rate current
Soft starter SSXB/SSXA serie User Manual
22