Poznámky redaktora
To able follow this instruction, you will need megger. Please look the correct instruction for the softstarter type you have. This can happen charged tool person touches component. . The tools are listed the instruction for how to
change thyristors. kindly ask you pay notice this, this vital point order
to ensure the life span the product also after repair. Compare this with the fact that some sensitive
components can destroyed when discharged much lower level
(about 100V).
Remove the plastic front cover (the example shows PST).
Disconnect the power cables from the main terminals 1L1, 3L2, and 5L3 and the motor cables from
terminals 2T1, 4T2 and 6T3
Disconnect all cables from the terminals 1to 20, the external keypad, and the PTC sensor and if
used, the Field bus plug.
2.
Therefore very important that all tools and personnel are discharged touching
an earthed point before the printed circuit board any the components are
touched. Tools
The need tools depends type softstarter.
-.
A person walking carpet can charged with fifteen
thousand volt (15000V).ESD Warning -Please note!
The life span electronics can affected damage caused electrostatic
discharge. Testing the thyristors -Step step
Before disconnecting the cables mark them.
Megger possible set 500V
3
