• ETT Level 2.12: Electrical Protective Devices

    Learn how to recognize and define fuses, protective relays, breaker trip devices, and surge suppressors and understand their and uses.

    1. Basic devices - Have the ability to recognize and define fuses, protective relays, breaker trip devices, and surge suppressors and to understand their differences and uses.
      • Electric protective devices Equipment applied to electric power systems to detect abnormal and intolerable conditions and to initiate appropriate corrective actions. These devices include lightning arresters, surge protectors, fuses, and relays with associated circuit breakers, reclosers, and so forth.
      • Types of Electrical Protection Relays or Protective Relays A relay is automatic device which senses an abnormal condition of electrical circuit and closes its contacts.
      • Surge Protection F.A.Q Think of lightning protection as a means to protect equipment, facilities and people from the effects of nearby or direct lightning events. Whereas, surge protection provides protection to equipment from the effects of more distant lightning events and/or power system anomalies.

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