Simostart Siemens Mv

Dear All,

I'm new member in this forum, I'm Tri and currently working for BOC gases Indonesia in Jakarta

Does anyone here (esp to Mark) have experience about Simostart Siemens softstarter MV??

1) I've been succeed commissioning the sofstarter 250A FLA in November last year, and then the motor compressor 139A running for a week then stop. Setting softstarter: curve 1 (standard), current limit, initial voltage, stall time and max start time being set.

2) Unfortunately, when I need to re-start the sofstarter last week it could not work. which were fault message:

SET CURVE TO 0

when i set to curve 0, the fault message is different:

SCR SHORT OR WRONG CONN

3) I had test the fiber optic lead using microcontroller test; red lead and green light are okey
4) After replaced firing board, the fault message is different which is UNBALANCE. seeing that I2 is quite far from I1 and I3

Does anyone here have eperience to test the SCR and fiber optic cable?

Mark, I try to reach you via Skype but could not. do you have any yahoo messager?

Tri
+62-21-4601793