Contactor Control Circuits Pdf

The circuit that applies the voltage to the coil is referred to as the control circuit because it controls the main device that the contactor or relay is switching.

Contactor control circuits pdf. The life expectancy of a contactor or contact life the life expectancy of a contactor or its contact life is one of the biggest concerns of a user. The coil voltage of a contactor or relay can be installed for virtually any control circuit voltage to provide complete flexibility for these devices both ac and dc as the control circuit can be completely independent of the. This includes enclosures conductors relays contactors pilot devices and overcurrent protection devices. All contactors fulfill the iec 60947 4 1 en 60947 4 1 standards.

The diagram symbols in table 1 are used by square d and where applicable conform to nema national electrical manufacturers a ssociation. This is the most common type of contactor used in industrial control applications. If we wanted to draw a simple ladder diagram showing a lamp that is controlled by a hand figure b shows a momentary control circuit to start and stop the 3 wire control start stop circuit the most common use of 3 wire control is a start. Pdf contactor wiring diagram with timer.

Contactor type ac control circuit iorr800 10 cc iorr1000 10 cc iorr1400 10 cc iorr1700 10 cc iorr2100 10 cc dc control circuit iore800 10 cc iore1000 10 cc iore1400 10 cc iore1700 10 cc iore2100 10 cc u max. Schematics made easy free download as word doc doc pdf file pdf text file momentary start stop circuit showing holding interlock and momentary. It shows the components of the circuit as streamlined shapes and the power and signal connections in between the tools. All dil contactor relays have double break contacts.

Circuit and the operating circuit in the de energized state between the contact input and output. Normally these contacts are not used in motor circuits. Auxiliary contacts of contactors are used in control circuits and are rated with nema contact ratings for the pilot circuit duty required. The auxiliary contact is often used in a relay logic circuit or for some other part of the motor control scheme typically switching 120 volt ac power instead of the motor voltage.

The selection of control equipment for a specific application requires a thorough. Control current is required by the magnetic contactor to open or close the circuit. Contactor breakers limit switch no static control standard elementary diagram symbols. Otherwise the arrangement wont function as it.

One contactor may have several auxiliary contacts either normally open or normally closed if required. 1 pole general use 600 v dc ie 800 a 1000 a 1300 a 1700 a 2000 a recap. Control elements the elements of a control circuit include all of the equipment and devices concerned with the circuit function. Collection of contactor wiring diagram pdf.

It is natural that the.