Motor controls
These switches are used to start, stop, and reverse single-phase or DC motors.
What are drum switches?
What are drum switches?
A wiring diagram is commonly called this
What is a connection diagram
This term describes the temperature or pressure difference between switch activation and reset points.
What is deadband?
This is the area around a magnet in which the effect of the magnet can be felt
What is a magnetic field
Most transient suppression modules clamp voltage transitions to approximately this percentage of the plant supply voltage.
What is 200%?
A 240V-to-24V transformer is most likely used for this type of circuit.
What is a motor control circuit?
In this sensing method, the target is detected as it passes between a sensor and reflector.
What is a retroreflective scan?
This type of switch remains in the operating position after the actuating force is removed.
What is a maintained contact switch?
This item shows the actual wire or cable point to point connections for a motor and its control circuits
What is a circuit schedule
I have a nema rating to protect against rain and sleet. What rating am I
Nema 3R
These IEC utilization categories are used for lighting and motor control applications.
What are AC-1, AC-2, AC-3, AC-4, AC-5a, AC-5b, AC-6a, AC-6b, and AC-11?
These are the three types of push-pull switches.
What are pull, maintained push, and momentary push?
This nec table provides the criteria for selecting the type of enclosure used in non hazardous locations
What is NEC table 110.28
Motor and controller overload protection is covered in this part of NEC Article 430.
What is Part III?
These are the two commonly used switching mechanisms.
What are Bourdon tube and bellows?
This is a static device that consists of one or more windings with a magnetic core and are used for introducing mutual coupling by induction between circuits
What is a transformer
These switches are used to select one of several different positions.
What are selector switches
Thermal overload relay heater units are commonly selected using this value from NEC Tables 430.247 through 430.250.
What is full-load current?
This device provides time delay by controlling airflow or liquid flow through an orifice.
What is a dashpot?
I am a general purpose enclosure whose use is primarily to prevent against accidental contact
What is a Nema 1 type box
This chapter governs the installation of motors circuits and controllers
What is Article 430
These are the two types of proximity sensors.
What are load-powered sensors and line-powered sensors?
This machine component applies force to the actuator of a limit switch.
What is a cam?
This type of proximity sensor draws its operating current through the load.
What is a line-powered proximity sensor?
The contacts on a switch are rated as a300 . in a 240vac configurationThe max breakpoint for these contacts is
What is 3amps