As shown in the illustrated 4-speed, 3-phase...

Question 1 / 205eccefa4bacbc34ba4d4838a

Question 1 of 205eccefa4bacbc34ba4d4838a

As shown in the illustrated 4-speed, 3-phase motor controller, what contactors are mechanically interlocked? See illustration EL-0170.

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Question 1 of 20

5eccefa4bacbc34ba4d4838a

As shown in the illustrated 4-speed, 3-phase motor controller, what contactors are mechanically interlocked? See illustration EL-0170.

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🔍 Key Concepts

• Mechanical interlock vs. electrical interlock on contactors • How mechanical interlocks are shown in ladder diagrams (often dashed lines between coils or contactor symbols) • Which speeds in a multi‑speed controller must NEVER be energized at the same time

💭 Think About

• Look closely at the lower ladder diagram: which contactor coils are connected together with dashed lines, and what does that symbol represent? • For each speed step (Low, 2nd, 3rd, High), ask yourself which other speed(s) would cause damage if they were closed together, and how the drawing prevents that. • Compare the contactors that share electrical interlocks (normally closed auxiliary contacts) with those that share only a mechanical interlock symbol—can you see which pair cannot be closed simultaneously by a mechanical link?

✅ Before You Answer

• Identify the symbol that represents mechanical interlock (not just a normally closed contact). • Trace which two specific contactor coils are directly tied together by that mechanical interlock symbol in the ladder portion of EL‑0170. • Confirm that those two contactors control mutually exclusive speed connections on the motor—both cannot be on together under any condition.

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Question 1 of 20

As shown in the illustrated 4-speed, 3-phase motor controller, what contactors are mechanically interlocked? See illustration EL-0170.

M1 and M2

M1 and M3

M3 and M4

M5 and M6

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Question 1 / 205eccefa4bacbc34ba4d4838a

Question 1 of 205eccefa4bacbc34ba4d4838a

As shown in the illustrated 4-speed, 3-phase motor controller, what contactors are mechanically interlocked? See illustration EL-0170.

Back

Question 1 of 20

5eccefa4bacbc34ba4d4838a

As shown in the illustrated 4-speed, 3-phase motor controller, what contactors are mechanically interlocked? See illustration EL-0170.

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