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Home > Grid Automation > Protection Relays > Auxiliary Relays > HAA Auxiliary or Annunciator Relay
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HAA Auxiliary or Annunciator Relay

HAA Auxiliary or Annunciator Relay
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Generally two specific forms of the HAA are available, a current operated unit and a voltage operated unit. Example: HAA15A4 is 0.2/2 A DC and the HAA15B5 is a 125 VDC unit. Also, two general case designs are available. The single units such as HAA 15 use a molded plastic case with glass window and all others the standard drawout case.

Features and Benefits
  • Current operated units available
  • High speed DC voltage operated units available
  • Drawout case available
  • Molded case with 3 mounting options available
  • Applications
  • When a target is required
  • When alarm or similar functions required
  • Interposing relay in conjunction with transformer SP relay
  • Protection and Control
  • Auxiliary contacts and targeting