Starting Relays
A potential relays contacts are in this position when a compressor starts.
Normally Closed
The maximum allowable voltage that can be applied to a start capacitor?
130%
Letter rating that determines the amount of temperature rise the insulation of a motor can withstand?
Insulation class
rpm = F x 2 x 120 / Number of Poles
Motor Speed
The two windings that make up a stator of a motor?
Run & Start
At what point will a centrifugal switch disconnect the start winding ?
75% of it's rated speed
When a motor uses both a start and run capacitor they are typically wired?
In Parallel
AC power is supplied in this frequency in Canada?
60 Hertz
VA = Volts of the Secondary x Current of Secondary
Control Transformer Rating
Motor winding with lowest resistance?
Run Winding
The positive temperature coefficient start device is a type of ?
Thermistor
A run capacitor is used to improve a motors?
Efficiency
Current draw a may motor may draw above nameplate values for a short period of time?
Service Factor?
% Imbalance = Max. Deviation from Average / Average Voltage?
Voltage & Current Imbalance
Motor part that turns within magnetic field?
Rotor
A starting relay normally used on small fractional horsepower compressor motors?
Current Relay
The maximum allowable voltage that can be applied to a run capacitor?
110%
LRA is typically determined by multiplying FLA ?
6 times
The sum of individual capacitors and voltage of the lowest rated capacitor?
Capacitors in parallel
Motor winding with highest resistance?
Start Winding
Current relay contacts are in this position when a compressor motor starts.
Normally Open
The identified terminal on a run capacitor must always be connected to ?
Line Side
The maximum torque a motor will develop without a relative drop in speed?
Breakdown Torque
The sum of all the reciprocals and combined voltages for capacitors?
Capacitors in Series
The difference between a motor's rated speed and actually speed it is running?
Slip