TAVRIDA ELECTRIC VCB15, Product Manual

Page: 47 / 116

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The CM performs the checkup of ISM main contacts position and updates the “ISM Main Contacts Position” relay
status in the following cases:
• If the Close command was applied from the CM. In this case, the update is performed within 150 ms after the
ISM main contacts closing.
• If the Trip command was applied from the CM. In this case the update is performed not later than in 70 ms after
ISM main contacts opening.
• Periodically every 10 s if no Close or Open command was applied from the CM.
If the application project requires you to define the main contacts position faster than the timing mentioned above,
please use the auxiliary switches installed in the ISM.