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Module 5. Digital techniques / Electronic instrument systems

In order to maintain HIRF protection, bonding checks between airframe and electrical components carrying voltages greater than 50 volts RMS or DC or main earth return should not exceed

  • 3 ohm.
  • 1 ohm.
  • 5 ohm.

Explanation

For HIRF and lightning protection, bonding between the airframe and electrical components carrying more than 50 volts, or the main earth return, must be a primary low-resistance bond not exceeding 1 ohm. Higher values such as 3 or 5 ohms would allow excessive potential differences and compromise the protective bonding.

regiboy asking:

Pls explain.

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