If you do not want a motor to re- start when power is lost, then is

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• Bimetal Strip Overload Relays Note that Bi-Metalic OLs can be adjusted. A Solder-Pot Ol only works for one current level. Three-phase Overloads (2 of 2) Bimetal Strip Relay Three-phase Overloads (1 of 2) • Three-phase overload relays are used to sense the current in each of the three phase lines. Single-phase Overload • Control circuit 3/3/2013 4
Three-phase Overloads (1 of 2) • Control circuit (This OL has 3 separate contacts) Magnetic Overload Relays • Two types – Elelctronic – Dashpot Electronic OLR This does a Whole lot more than simply open the circuit if the current a bit too high for a bit too long! Click-it for more information. Three-phase Overloads (2 of 2) • Control circuit (This OL has one contact) Magnetic Overload Relays Electronic (1 of 2) • Use current transformers to sense motor current. – (like and Amp-Clamp) Electronic Overload Relays (2 of 2) 3/3/2013 5
Page 1 and 2: Recall : What are the 2 sections of
Page 3: Thermal Overload Relays • Thermal
Page 7 and 8: Dashpot Overload Relay (7 of 8) •
Page 9: 2 classes of Overload Sensors: 2 Ov

If you do not want a motor to re- start when power is lost, then is

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