Exam 15: Forward-Reverse Control, Jogging and Inching

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____________________ prevents some action from taking place until some other action has been performed.

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Interlocking

The term inching actually means to start a motor with short jabs of power at full voltage.

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How do jogging circuits work?

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As with many other types of control circuits, there are different ways in which jogging can be accomplished but, basically, jogging is accomplished by preventing the holding contact from sealing the circuit around the start push button when the motor starter energizes. It should also be noted that jogging circuits require special motor starters rated for jogging duty.

The addition of a(n) ____ to the jog circuit eliminates the problem of the holding contacts making connection before the normally closed section of the jog push button reconnects.

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A(n) ____________________ switch can be employed to provide jogging. The switch is used to break the connection to the holding contacts.

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Because the motor is connected to the power line regardless of which direction it operates, ____ contactor(s) is (are) needed for each direction.

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True reversing controllers contain two separate contactors and _____ overload relay(s).

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The term jogging means to start a motor with short jabs of power at reduced voltage.

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How can you reverse the direction of rotation of a single-phase split-phase motor?

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If only one motor is in operation, only one overload relay is needed to protect the motor.

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____________________ can be used to reduce the amount of voltage applied to the motor during inching, or reactors or resistors can be connected in series with the motor to reduce the current supplied by the power line.

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What are the two methods of electrical interlocking?

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Why are the terms jogging and inching often used interchangeably?

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Most reversing controllers contain ____________________ interlocks as well as electrical interlocks.

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