APG KA Cable Suspended user manual - Manual (Page 17)

Rev. A2, 12/08 KA Series
17
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• Control Contact Ratings
The contacts used in the KA fl oat switches are high performance
microswitches. Although they are capable of carrying quite high currents at
up to 250 VAC, it is not a good practice to put pump motor currents directly
through these contacts because they are immersed in the liquid. Thus, it is
usually just low sensing currents for relay coil operation that are applied to
the fl oat switch contacts.
Relays with heavy duty contacts are known as contactors. Pump motor
manufacturers often provide suitable contactors with control circuits on