Brush wear detector system with latching relay

A brush wear detection system, comprising:

• a dynamoelectric machine having a plurality of brushes;
• at least one sensing wire means for providing a brush wear signal indicative of critical brush wear;
• a latching relay operatively connected to said sensing wire means;
• said latching relay including a set relay and a reset relay;
• said set relay having a first frame, a first coil assembly responsive to said brush wear signal including a first core and at least one first winding, and a first movable armature, said first coil assembly having a first longitudinal axis and a first armature having a second longitudinal axis, said first axis being substantially perpendicular to said second axis;
• said reset relay having a second frame, a second coil assembly including a second core and a second winding, and a second moveable armature;
• said second coil assembly having a third longitudinal axis and said second armature having a fourth longitudinal axis, said third axis being substantially perpendicular to said fourth axis;
• said set relay being disposed perpendicularly to said reset relay, said first axis being perpendicular to said third axis and said second axis being substantially perpendicular to said fourth axis;
• said first axis intersecting said second axis, and said third axis intersecting said fourth axis, said second axis being substantially parallel to said third axis and said first axis being substantially parallel to said fourth axis, and said third axis being substantially spaced from said second axis;
• said first armature having an energized position and a de-energized position responsive to said first coil assembly;
• said second armature having an energized position and a de-energized position responsive to said second coil assembly;
• said first armature substantially perpendicularly overlapping a portion of said second armature and latching said second armature in said energized position when said first armature is in said de-energized position;
• said second armature substantially perpendicularly overlapping a portion of said first armature and latching said first armature in said energized position when said first armature has moved to said energized position responsive to said first coil assembly;
• said set relay including a pair of alarm contacts operatively connected to a source of power and to an alarm means for providing an indication of brush wear responsive to said sensing wire.