Control Circuits and diagrams Flashcards
what is a control ciruit and how does it operate? Also, what are the schematics usally drawn as?
- Low current circuit that use relay logic to control the operation of higher power devices
- Often operate on a lower voltage than the final output devices they control, such as motor, heater, or lighting loads
- Schematic diagrams of control circuits are often ladder diagrams, which are used to trouble shoot control problems
Name the circled components
Name this component and draw its schematic
SPDT relay control circuit
What is this and draw its disagram
Motor starter
What is this diagram also what does the phrase novoltage realase mean and two wire control
Two wire control circuit
Those phrases should indicate that an automatic piliot device such as limit switch or float switch opens and closes the control circuit though a single contact.
What kind of control schematic is this for
also what should the name tell you about the circuit
Three wire control circuit
the comman means of providing this type of control is a start stop pushbutton station
What type of circuit is this?
Low voltage control circuit
What are some common control voltages
120VAC
24VAC
12VAC
1VDC
24VDC
250VDC
What is this control circuit?
Hand off auto control circuit
Draw an Alarm Silencing control circuit
How does revering motor starter work
It uses contactors to switch the line connections to two of the three motor leads of a three phase motor
Draw the motor power ciruit connection for the reversing motor starter
What is this circuit and draw it
Starter mechanical Interlock
What does mechanical interlock between the coils do?
prevents the starter from closing all contacts simutaneously
What type of control circuit is this?
Sequence Control Circuit
Draw the 3 different Overload Contact connections
What is a fail safe circuit?
and draw an example fail safe circuit
A fail safe circuit is one in which the output device produces a desired effect when power is removed from it.
Draw a jogging circuit
