Motors
A ? may be used to start the rotor rotation and speed it up to almost synchronous speed.
Pony Motor
The torque produced by an overloaded motor that pulls the rotor out of synchronization is referred to as ? torque.
pull-out
What is the locals address
3729 Chichester ave. boothwyn pa 19061
Which of the following methods of motor braking requires the most maintenance?
Friction braking
A common type of design for a(n) ? is a current-type relay in series with the discharge resistor.
out-of-step relay (OSR)
The two parts of the rotor of a synchronous motor are a(n) ? winding and a rotor DC field winding.
Amortisseur
? torque develops during transition as the motor speeds up to the synchronous speed from the maximum speed running as an induction motor.
Pull-in
Who is the Locals president?
Bill Adams
Stator windings in a consequent-pole motor usually provide two speeds, one of which is ? the speed of the other.
half
A Schrage motor rotor has ? winding(s).
2
If a synchronous motor slips out of synchronous speed, ? are needed to shut it down.
protective relays
A synchronous ? is a synchronous motor that provides power factor correction when operated at no load.
condenser
when was the local founded?
February 23 1939
Typical synchronous speeds for 60 Hertz consequent-pole motors are ? rpm with 2 poles and ? rpm with 4 poles.
3600 / 1800
The relative position of the ? in Schrage AC motors is changed to change the speed of the motor.
brushes
Synchronous motors can be protected from damage caused by the loss of excitation in the DC winding by a ? .
loss-of-excitation relay
A synchronous motor can control the ? factor in a plant by varying the DC field current in the ? .
power / rotor
What company holds LU 654 defined contribution
Empower
A consequent-pole motor with 2 poles when wired in series has ? poles when wired in parallel.
4
The ? frequency of AC drives is the frequency that controls the number of times the solid state switches in the inverter section turn on and off.
Carrier
A(n) ? is a relay that controls the F relay, which in turn removes the discharge resistor from the starting circuit of a synchronous motor and applies current to the DC field windings.
polarized field frequency relay (PFFR)
? is a method of motor braking where the braking energy is dissipated as heat in a resistor as a motor is reconnected to act as a generator immediately after it is turned off.
Dynamic braking
Who are the two women that work in our front office
Kristi and Jacki
In a Schrage motor, the brushes are placed on different commutator segments in order to change the ? across the primary stator windings.
voltage
The frequency of the voltage used to control motor speed is called the ? frequency.
Fundamental