Rotary lockout tagout latch system

An enclosure comprising:

• a body including an internal space and an enclosure opening that provides access to the internal space;
• a door movable between a closed position and an opened position, wherein the door covers the enclosure opening and blocks access to the internal space in the closed position, said door including a door opening defined therein;
• and
• a latch system connected to said body in said internal space, said latch system comprising:
• a latch arm receiver connected to said door;
• a circuit breaker that controls connection of electrical power to associated equipment located in said internal space of said body, said circuit breaker including a toggle that moves between a first toggle position, a second toggle position, a third toggle position, and a fourth toggle position corresponding respectively to ON, TRIPPED, OFF, and RESET operative states of the circuit breaker;
• and
• a latch arm assembly connected to the circuit breaker in operative engagement with the circuit breaker toggle to move said toggle between said first, second, third, and fourth toggle positions, said latch arm assembly comprising:
• a chassis;
• a latch arm that moves relative to the chassis between:
• (i) a first arm position;
• (ii) a second arm position;
• and (iii) an intermediate arm position between the first arm position and the second arm position;
• wherein said latch arm is located in said intermediate arm position when engaged with the latch arm receiver;
• a latch arm spring that biases the latch arm toward its first arm position;
• a handle rotatably connected to the chassis and operatively connected to the toggle of the circuit breaker, said handle movable to and between an ON handle position corresponding to the first toggle position, a TRIP handle position corresponding to the second toggle position, an OFF handle position corresponding to the third toggle position, and a RESET handle position corresponding to the fourth toggle position;
• said handle operatively connected to said latch arm such that said latch arm is positioned in said second arm position when said handle is located in said RESET handle position, wherein said latch arm spring biases said latch arm into one of said first arm position and said intermediate arm position when said handle is in any one of said ON handle position, said TRIP handle position, and said OFF handle position;
• and
• a lockout plunger connected to the handle to rotate with the handle and movable between a disengaged position and an engaged position, wherein said lockout plunger prevents movement of the handle from the OFF handle position to the ON handle position when the lockout plunger is in its engaged position.

A latch system for an electrical equipment enclosure, said latch system comprising:

• a latch arm receiver adapted to be connected to an associated enclosure door;
• and
• a latch arm assembly adapted to be connected in operative engagement with an associated circuit breaker, said latch arm assembly comprising:
• a chassis;
• a latch arm that moves relative to the chassis between:
• (i) a first arm position;
• (ii) a second arm position;
• and (iii) an intermediate arm position between the first arm position and the second arm position;
• a latch arm spring that biases the latch arm toward its first arm position;
• a handle rotatably connected to the chassis and operatively connected to a toggle of the associated circuit breaker, said handle movable to and between an ON handle position, a TRIP handle position, an OFF handle position, and a RESET handle position;
• said handle operatively connected to said latch arm such that said latch arm is positioned in said second arm position when said handle is located in said RESET handle position, wherein said latch arm spring biases said latch arm into one of said first arm position and said intermediate arm position when said handle is in any one of said ON handle position, said TRIP handle position, and said OFF handle position;
• a lockout plunger connected to the handle to rotate with the handle and movable between a disengaged position and an engaged position, wherein said lockout plunger prevents movement of the handle from the OFF handle position to the ON handle position when the lockout plunger is in its engaged position;
• and
• said lockout plunger movable from its disengaged position to its engaged position only when said handle is rotated away from said OFF handle position toward said RESET handle position to a LOCKOUT handle position that is at least 15 degrees angularly spaced from said OFF handle position toward said RESET handle position.