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

Manufacturing for the following models remain available:

• HAA 11
• HAA 13
• HAA 15
• HAA 16

Manufacturing for the following models has been discontinued:

• HAA 12 - Manufacturing has been discontinued. As an alternative, please refer to HAA16.
• HAA 14 - Manufacturing has been discontinued. As an alternative, please refer to HAA16.
• HAA 18 - Manufacturing has been discontinued. As an alternative, please refer to HAA16.
• HAA 19 - Manufacturing has been discontinued. As an alternative, please refer to HAA11, HAA13, HAA15 or HAA16.
• HAA 99 - Manufacturing has been discontinued. As an alternative, please refer to HAA11, HAA13, HAA15 or HAA16.