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Electrician Red Seal · Question

An old industrial facility often experiences motor burnouts due to severe undervoltage conditions. A new motor control centre is being installed. Which protective device, specifically addressed by CE Code Rule 28-200, is designed to protect motors against these undervoltage conditions?

CE Code Rule 28-200 requires that motors with an output exceeding 0.37 kW (½ hp) in certain locations (e.g., where continuous operation is critical) be provided

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Question: An old industrial facility often experiences motor burnouts due to severe undervoltage conditions. A new motor control centre is being installed. Which protective device, specifically addressed by CE Code Rule 28-200, is designed to protect motors against these undervoltage conditions?

Answer options:

  • Overload relays
  • Short-circuit protective devices
  • Phase loss relays ✅ Undervoltage release/protection devices

Correct answer: Undervoltage release/protection devices

Explanation: CE Code Rule 28-200 requires that motors with an output exceeding 0.37 kW (½ hp) in certain locations (e.g., where continuous operation is critical) be provided with undervoltage protection or undervoltage release. This directly addresses the problem of motor damage due to significant voltage drops.

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