EA 150 chapter 4 quiz questions
The type of three phase motor is determined by the
Router
If a squirrel cage induction motor draws 2 A of current at 240 V and is connected for use on 480 V the amperage will be
1 amp
Hey circuit breaker suitable for use as a motor disconnecting means must have a current rating of at least
115% of the motor full load current
If 210 ohms windings are connected in series 4 configuration on 480 V the total impedance is
20 ohms
Of the following motors the most common likely to have 15 or 18 motor leads is the
2400 V three phase motor
The synchronous speed of 60 Hz three phase induction motor with two poles is
3600 RPM
With 240 V applied to a total parallel impedance of five ohms the current is
48 A
The total resistance of a starter winding and a three phase motor if the windings are connected in parallel and the resistance of each winding is 96 ohms is
48 ohms
If the starter windings of a dual voltage motor both have an appearance of 10 ohms and they are connected in parallel the total impedance is
Five ohms
The main purpose of motor overload protection is to protect the motor
From damaging overload currents
Doubling the voltage on a dual voltage motor
Halves the full load current
Starter Winings can best be described as
Hey structure of copper or aluminum wire coils
The most common number of motor leads found on a three phase why wound motor is
Nine
The synchronous speed of a motor is the
Speed at which the magnetic fields rotate
The two most common three phase motor configurations are
Why and delta