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Protect capacitor against over load and short circuit

Use of HRC fuse or MCCBs for short circuit protection of capacitor

  • The cable for short circuit protection should be selected such that it protects capacitor for 1.5 times the rated current. 
  • The HRC fuse does not protect capacitor against over load, it is used only for short circuit protection. 
  • The rating of HRC fuse should be 1.6 to 1.8 times that of rated capacitor current. HRC fuse does not use for switching of capacitor.

Overload protection of capacitor

  • A thermal magnetic relay is used for protection of capacitor against over load



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