{"id":159,"date":"2020-01-18T17:33:34","date_gmt":"2020-01-18T22:33:34","guid":{"rendered":"https:\/\/pressbooks.bccampus.ca\/basicmotorcontrol\/?post_type=chapter&p=159"},"modified":"2020-08-14T18:31:37","modified_gmt":"2020-08-14T22:31:37","slug":"circuits-overview","status":"publish","type":"chapter","link":"https:\/\/pressbooks.bccampus.ca\/basicmotorcontrol\/chapter\/circuits-overview\/","title":{"raw":"Circuits Overview","rendered":"Circuits Overview"},"content":{"raw":"When discussing motor controls, there are two circuits that need to be well understood.\r\n\r\nThe first is the [pb_glossary id=\"798\"]power circuit<\/strong>[\/pb_glossary]. This circuit is relatively straightforward. It is a 3-phase circuit which powers the motor and can operate as high as 600A at 600V or even beyond.\r\n\r\nThe second is the [pb_glossary id=\"796\"]control circuit<\/strong>[\/pb_glossary]. This is the circuit which controls the power circuit. This circuit can be as simple as a two-wire [pb_glossary id=\"772\"]pilot device<\/strong>[\/pb_glossary], or it can be very complex with many interlocking features and multiple starter and timer coils. The control circuit will often operate at a lower [pb_glossary id=\"718\"]voltage<\/strong>[\/pb_glossary] relative to the power circuit.\r\n\r\nWe will be spending the majority of our time discussing common control-circuit designs, so it's best to start with a quick overview of the power circuit.","rendered":"

When discussing motor controls, there are two circuits that need to be well understood.<\/p>\n

The first is the power circuit<\/strong><\/a>. This circuit is relatively straightforward. It is a 3-phase circuit which powers the motor and can operate as high as 600A at 600V or even beyond.<\/p>\n

The second is the control circuit<\/strong><\/a>. This is the circuit which controls the power circuit. This circuit can be as simple as a two-wire pilot device<\/strong><\/a>, or it can be very complex with many interlocking features and multiple starter and timer coils. The control circuit will often operate at a lower voltage<\/strong><\/a> relative to the power circuit.<\/p>\n

We will be spending the majority of our time discussing common control-circuit designs, so it’s best to start with a quick overview of the power circuit.<\/p>\n

definition<\/span>