Poznámky redaktora
The tools are listed the instruction for how to
change thyristors.
Remove the plastic front cover (the example shows PST). Testing the thyristors -Step step
Before disconnecting the cables mark them.
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.
2. Compare this with the fact that some sensitive
components can destroyed when discharged much lower level
(about 100V). Please look the correct instruction for the softstarter type you have.
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.
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. This can happen charged tool person touches component.
-.
To able follow this instruction, you will need megger.
Megger possible set 500V
3. kindly ask you pay notice this, this vital point order
to ensure the life span the product also after repair
