Westpow STR.B Series User Manual page 16

User Manual User Manual
Current Limit at starting Current Limit at starting
At the Current Limit mode, this parameter indicate the maximum current At the Current Limit mode, this parameter indicate the maximum current
during starting. The range of this parameter is 20%~400% of Ie. The during starting. The range of this parameter is 20%~400% of Ie. The
default is 300, it means the starting current is the triple of the rate current. default is 300, it means the starting current is the triple of the rate current.
When this parameter is set, lame A,% on the keyboard is light, When this parameter is set, lame A,% on the keyboard is light,
For the fun and pump load type, it is all right. For other load type, user can For the fun and pump load type, it is all right. For other load type, user can
modify it according to the character of load type. It is better to set modify it according to the character of load type. It is better to set
between 250% and 350%. This parameter is invalid at the Voltage Ramp between 250% and 350%. This parameter is invalid at the Voltage Ramp
mode. mode.
Current Limit Time Current Limit Time
The range of Current Limit Time is 1~120 second at the Current Limit The range of Current Limit Time is 1~120 second at the Current Limit
mode. The default is 30. When setting this parameter, lamp S on the mode. The default is 30. When setting this parameter, lamp S on the
keyboard is light. keyboard is light.
In the Current Limit Mode, if the actual starting time is longer than this In the Current Limit Mode, if the actual starting time is longer than this
value, and the starting current is not fell under the 125% of the motor rate value, and the starting current is not fell under the 125% of the motor rate
current, system enter the Protection State. current, system enter the Protection State.
Over Current protect at starting and stopping Over Current protect at starting and stopping
The range of this parameter is 400~600%Ie. This parameter is set for the 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 protect function aimed at the big current at the starting process. The
default value is 400. default value is 400.
This parameter should be increased when the inertial of the load is This parameter should be increased when the inertial of the load is
increase. increase.
Current Unbalance Factor Current Unbalance Factor
This parameter is set for the protect function aimed at that the difference 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 of 3 phases current is bigger at running. The default value is 30%.The
smaller this parameter is, the more the sensitivity is. This parameter smaller this parameter is, the more the sensitivity is. This parameter
should not is too small, in order to avoid the protection is too sensitive to should not is too small, in order to avoid the protection is too sensitive to
influence the normal operation of the equipment. influence the normal operation of the equipment.
Note: This protect function is active only when the average current is Note: This protect function is active only when the average current is
bigger than the 20% of the rate current. bigger than the 20% of the rate current.
The calculation of the current unbalance factor. The calculation of the current unbalance factor.
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Control Mode Control Mode
Modifying this parameter, user can change between the keyboard and Modifying this parameter, user can change between the keyboard and
terminal easily. The default is 1. It means the keyboard control. If it is set terminal 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 2, it means the terminal control. If it is set 3, it means the terminal control
and keyboard control are all available. and keyboard control are all available.
Note: Note:
If the value is set 3 (keyboard and terminal are all available), the If the value is set 3 (keyboard and terminal are all available), the
keyboard control can't work if the two-line connect way is selected.For keyboard control can't work if the two-line connect way is selected.For
detail see Table 8-1 and chapter9.5. detail see Table 8-1 and chapter9.5.
SCR Trigger select SCR Trigger select
The operation mode of SCR is decided by it after the bypass contactor is The operation mode of SCR is decided by it after the bypass contactor is
on. on.
1.when the bypass is on, SCR trigger is blocked. The running current 1.when the bypass is on, SCR trigger is blocked. The running current
shows on the keyboard, and the protection functions are all on.
shows on the keyboard, and the protection functions are all on.
2.when the bypass is on, SCR trigger is not blocked. The running current 2.when the bypass is on, SCR trigger is not blocked. The running current
shows on the keyboard, and the protection functions are all on. shows on the keyboard, and the protection functions are all on.
3.when the bypass is on, SCR trigger is blocked. The running current 3.when the bypass is on, SCR trigger is blocked. The running current
doesn't show on the keyboard, and the protection functions are all off. doesn't show on the keyboard, and the protection functions are all off.
The default value is 2 The default value is 2
Starting overload level Starting overload level
There are 8 levels. The protection time of every level is different. The There are 8 levels. The protection time of every level is different. The
relation between overload multiples and protection operation time shows relation between overload multiples and protection operation time shows
in chapter12.2. The default value is 4. in chapter12.2. The default value is 4.
Note: The overload protection is inverse time after the bypass contactor is Note: The overload protection is inverse time after the bypass contactor is
on. It isn't selected. For detail see chapter 12.2. on. It isn't selected. For detail see chapter 12.2.
Over current protection during running Over current protection during running
This protection function will put into work as soon as the instant current 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 is big. The default value is 200%. It means the protection value is twice as
the rate current. the rate current.
Stopping mode Stopping mode
There are two stopping mode: soft stop and free stop. The default value is There are two stopping mode: soft stop and free stop. The default value is
1-free stop. The soft stop function is used to avoid 1-free stop. The soft stop function is used to avoid
The free stop is adopted as normal. The free stop is adopted as normal.
Soft stop factor Soft stop factor
This parameter is valid only when the stopping mode is free stop. It 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 decide the time and effect of the soft stop. The smooth stop effect will be
gained if this parameter is set correct. gained if this parameter is set correct.
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Water Hammer Water Hammer . .
OPERATION 25
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