Referring to the illustration of a steering...

Question 1 / 2066636eed28f7522a1c51d9c8

Question 1 of 2066636eed28f7522a1c51d9c8

Referring to the illustration of a steering gear hydraulic power unit motor controller, if the motor is drawing current no greater than full load current, what will the status of the overload relay contacts and the control relay contacts be? Illustration EL-0119

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Question 1 of 20

66636eed28f7522a1c51d9c8

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🔍 Key Concepts

• Overload relay contacts (OL) are usually drawn in their "normal" state, which is the state when there is no overload (motor current at or below full-load). • The control relay (CR) coil will be energized only when its supply path through the overload relay and line contactor is complete, which happens when the motor is running normally. • Follow the control circuit path from the GP supply, through the overload relay, to the CR coil and then to the CR contacts that operate the Run and Overload indications.

💭 Think About

• When motor current is at or below full-load, would the overload device trip or stay reset? From that, what is the natural state (open or closed) of its control contacts? • If the overload relay has not tripped, is the CR coil energized or de‑energized in this diagram? Then, in that condition, are the CR contacts shown as open or closed? • Look at what must be true in the circuit for the motor to be running: which contacts in the control circuit have to be closed to keep power applied and the Run light available?

✅ Before You Answer

• Verify which symbol in the control circuit represents the normally closed overload contact in series with the control relay coil. • Check whether the CR contacts that feed the Run and Overload lamps are shown as normally open or normally closed, and what happens to them when CR is energized. • Confirm that with current no greater than full-load, the overload relay is not tripped, so its contacts remain in their normal, reset position.

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Question 1 of 20

The overload relay contacts will be OPEN The control relay contacts will be CLOSED

The overload relay contacts will be OPEN The control relay contacts will be OPEN

The overload relay contacts will be CLOSED The control relay contacts will be CLOSED

The overload relay contacts will be CLOSED The control relay contacts will be OPEN

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Question 1 / 2066636eed28f7522a1c51d9c8

Question 1 of 2066636eed28f7522a1c51d9c8

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Question 1 of 20

66636eed28f7522a1c51d9c8

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🔍 Key Concepts

💭 Think About

✅ Before You Answer

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