High voltage DC relay

A latching relay comprising:

• a first coil;
• a second coil;
• a common plunger operatively connected between said first coil and said second coil such that activation of said first coil moves said plunger in a first direction to a first position and activation of said second coil moves said plunger in a second direction, opposite to the first direction, to a second position;
• a pair of load contacts moveable between a closed position in which power is supplied to a load and an open position in which power to the load is interrupted, wherein the pair of load contacts comprises a stationary load contact and a moveable load contact;
• a limit switch comprising a common contact, a first coil contact and a second coil contact, wherein a position of said common contact is alternately switched between electrical connection to either the first coil contact or the second coil contact based on a position of said plunger;
• said first coil contact being electrically connected to said first coil and said second coil contact being electrically connected to said second coil such that when electrical power is applied to the common contact, the electrical power is alternately applied to either the first coil or the second coil depending on the position of the common contact;
• a moveable load contact arm operatively connected to said plunger, and wherein the moveable load contact is disposed on the moveable load contact arm;
• and
• a linkage operatively connected between the plunger, the moveable load contact arm and the limit switch, wherein movement of the plunger causes simultaneous movement of both the moveable contact arm and the common contact of the limit switch via the linkage.

A latching relay comprising:

• a first coil;
• a second coil;
• a common plunger operatively connected between said first coil and said second coil such that activation of said first coil moves said plunger in a first direction to a first position and activation of said second coil moves said plunger in a second direction, opposite to the first direction, to a second position;
• a pair of load contacts moveable between a closed position in which power is supplied to a load and an open position in which power to the load is interrupted;
• a limit switch comprising a common contact, a first coil contact and a second coil contact, wherein a position of said common contact is alternately switched between electrical connection to either the first coil contact or the second coil contact based on a position of said plunger;
• said first coil contact being electrically connected to said first coil and said second coil contact being electrically connected to said second coil such that when electrical power is applied to the common contact, the electrical power is alternately applied to either the first coil or the second coil depending on the position of the common contact;
• an arc extinguisher positioned adjacent the pair of load contacts, the arc extinguisher adapted to facilitate quenching of an arc created between the pair of load contacts;
• and
• a housing in which are disposed said first coil, said second coil, said plunger, said limit switch, said pair of load contacts and said arc extinguisher.

A latching relay comprising:

• a first coil;
• a second coil;
• a common plunger operatively connected between said first coil and said second coil such that activation of said first coil moves said plunger in a first direction to a first position and activation of said second coil moves said plunger in a second direction, opposite to the first direction, to a second position;
• a limit switch comprising a common contact, a first coil contact and a second coil contact, wherein a position of said common contact is alternately switched between electrical connection to either the first coil contact or the second coil contact based on a position of said plunger;
• said first coil contact being electrically connected to said first coil and said second coil contact being electrically connected to said second coil such that when electrical power is applied to the common contact, the electrical power is alternately applied to either the first coil or the second coil depending on the position of the common contact;
• and
• wherein said first coil, said second coil and said limit switch are all mounted on a common circuit board.

A latching relay comprising:

• a housing;
• a first coil disposed in said housing;
• a second coil disposed in said housing;
• a common plunger operatively connected between said first coil and said second coil such that activation of said first coil moves said plunger in a first direction to a first position and activation of said second coil moves said plunger in a second direction, opposite to the first direction, to a second position;
• a limit switch disposed in said housing, said limit switch comprising a common contact, a first coil contact and a second coil contact, wherein a position of said common contact is alternately switched between electrical connection to either the first coil contact or the second coil contact based on a position of said plunger;
• said first coil contact being electrically connected to said first coil and said second coil contact being electrically connected to said second coil such that when electrical power is applied to the common contact, the electrical power is alternately applied to either the first coil or the second coil depending on the position of the common contact;
• a moveable load contact arm operatively connected to said plunger;
• a pair of load contacts moveable between a closed position in which power is supplied to a load and an open position in which power to the load is interrupted, said pair of load contacts comprising a stationary load contact and a moveable load contact disposed on the moveable load contact arm;
• and
• a linkage operatively connected between the plunger, the moveable load contact arm and the limit switch, wherein movement of the plunger causes simultaneous movement of both the moveable contact arm and the common contact of the limit switch via the linkage.