As shown in the illustration, in addition to...

Question 1 / 205eccefa4bacbc34ba4d4833d

Question 1 of 205eccefa4bacbc34ba4d4833d

As shown in the illustration, in addition to mechanical interlocking of the contactors, how is simultaneous pulling in of both the "1S" and 'R" contactors prevented? See illustration EL-0012.

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Question 1 of 20

5eccefa4bacbc34ba4d4833d

As shown in the illustration, in addition to mechanical interlocking of the contactors, how is simultaneous pulling in of both the "1S" and 'R" contactors prevented? See illustration EL-0012.

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🔍 Key Concepts

• Identify which auxiliary contacts are normally closed (NC) and which are normally open (NO) in the control circuit above the contactor coils. • Trace the control circuit path to the 1S coil and then to the R coil to see what happens if one is already energized. • Note how the 2S timed contacts (TO and TC) behave during start and after the time delay and whether their state alone could block both coils from being energized together.

💭 Think About

• If 1S is already pulled in, what happens to the control power path that would try to energize R? Which contact actually opens that path? • If R is already pulled in, what happens to the path that would try to energize 1S? Which contact in the schematic changes state to prevent this? • Do the 2S timed contacts still provide interlocking once the timer has finished its function, or are they mainly for changing from starting to running connections?

✅ Before You Answer

• Verify which auxiliary contacts labeled 1S and R in the top control circuit are drawn as normally closed and which as normally open. • Confirm whether both 1S and R coils could ever have a closed path to power at the same time, based on the normal (de‑energized) state of the drawing. • Check that mechanical interlock is shown between 1S and R, but ask yourself what electrical feature, visible in the ladder diagram, independently prevents both from energizing together.

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Question 1 of 20

As shown in the illustration, in addition to mechanical interlocking of the contactors, how is simultaneous pulling in of both the "1S" and 'R" contactors prevented? See illustration EL-0012.

Electrical interlocking by means of normally open "1S" and "R" auxiliary contacts.

Electrical interlocking by means of normally closed "1S" and "R" auxiliary contacts.

Electrical interlocking by means of the normally closed, timed open and the normally open, timed closed "2S" contacts.

Mechanical interlocking is the only means by which simultaneous pulling in of the "1S and "R" contactors is prevented.

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Question 1 / 205eccefa4bacbc34ba4d4833d

Question 1 of 205eccefa4bacbc34ba4d4833d

As shown in the illustration, in addition to mechanical interlocking of the contactors, how is simultaneous pulling in of both the "1S" and 'R" contactors prevented? See illustration EL-0012.

Back

Question 1 of 20

5eccefa4bacbc34ba4d4833d

As shown in the illustration, in addition to mechanical interlocking of the contactors, how is simultaneous pulling in of both the "1S" and 'R" contactors prevented? See illustration EL-0012.

No comments yet

Be the first to share your thoughts!

If the question has a related picture, it will appear here.

🔍 Key Concepts

💭 Think About

✅ Before You Answer

👋 Hi! I'm Genie, your AI study assistant. How can I help you with this question?

Quick actions

— No credit card needed