Surge Suppression for Reversible/synchronous Motors

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Surge Suppression for Reversible/synchronous Motors

Postby om_tech_support_JT » Tue Jul 31, 2012 4:03 pm

Q: I am trying to connect a SMK216A-GN synchronous motor by following the connection diagram in the manual. I see there is a capacitor and resistor connected in series at the switch. What are those for and how do I select the capacitance and resistance values?

A: The capacitor and resistor in series connection shown in the diagram is actually a CR circuit for surge suppression.
surge suppression.png
surge suppression.png (8.26 KiB) Viewed 3026 times

The main purpose of this circuit is to protect the contact of the switch since there could be a large in rush current at the moment when the switch is closed, or switching directions. This is sold separately as an accessory, and the part number is EPCR1201-2. You can find this part on our website by using the link below: ... epcr1201-2

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