DIAGRAMS
MOTOR COTROLLERS
LARGE MOTORS
THERMOSTATS
RELAYS
100
An Overload Device
What is a fuse?
100
Be Capable of Carrying the Current Involved
What is a requirement of a Motor Controller? 
100
Three Overload Relays
What is required for the protection of a Three-Phase Motor?
100
Electric, Electronic, Pneumatic
What are Types of Thermostats?
100
Maintain Contact Relay
What is the basic type of a Push-button Relay? 
200
Fuse/Breaker
What is a device used to protect electrical circuits?
200
Mechanical Load by the Driven Machine
What is the reason for motors to draw excessive current?
200
High Resistance Between Cables and Conduit
What is the best way to check for grounds?
200
Two-Position, Floating, Proportional
What is Mode of Control Action?
200
Hand/Off/Automatic
What is a Three-Position Selector Relay?
300
Wiring Diagrams
What are devices in the system and their physical relation to each other?
300
Inherent Protection
What is Motor Over-current Protection?
300
Maintenance on Starter Contacts
What is removal of Foreign Deposits?
300
Heating, Cooling, Heating/Cooling
What is the function of a thermostat?
300
Solid State Relay
What is another type of timing mechanism?
400
Disconnecting the Fused Circuit
What must be done whenever fuses are used?
400
Phase Reversal Relays
What prevents motors from operation in reverse rotation?
400
Shading Coil
What are short-circuiting turns of a conductor inset in the ceiling faces of a magnetic core?
400
Wall, Immersion, Strap-On
What is the construction of a thermostat?
400
Low Voltage
What causes release of a relay?
500
Control Circuits Often Carry Line Voltage
How does the voltage and method of protection affect wiring methods?
500
Thermal Overload Relay
What is a Bi-Metal strip that bends when heated, and opens a switch?
500
85% to 110% of Name Plate Voltage
What is Adequate Operating Magnetic Voltage?
500
Low Voltage Thermostat
What requires the use of a Step-Down Transformer in the control system?
500
Lock-Out Relay
What is used to interrupt the circuit when a malfunction is detected?
M
e
n
u