Phase reversal switch mechanism
AssigneeWestinghouse Electric Corp.
InventorHenry R. Beck
Life of this patent
Estimating the term…
Abstract
Phase reversal switch apparatus for a three-phase high-current isolated phase bus circuit includes a non-reversing phase switch, and two groups of two reversing phase switches. The apparatus also includes a phase reversal mechanism having a rotatable operating shaft with a drive lever, a non-reversing lever, and two reversing levers coupled thereto. Locking and drive couplings are selectively engaged with the levers and operated by a shift actuator and a switch actuator to selectively operate the non-reversing switch and the first and second reversing switches to effect a phase sequence reversing operation in a secure and efficient manner.
Claims14
Phase reversal switch apparatus, comprising:
- first and second groups of reversing phase switches;
- a non-reversing phase switch;
- a rotatable operating shaft;
- drive lever means coupled to said operating shaft so as to permit torque to be transmitted thereto;
- switch actuator means connected to said drive lever for moving said drive lever means to cause said operating shaft to rotate between OPEN and CLOSE positions;
- non-reversing switch lever means coupled to said drive lever means to permit torque to be transmitted therefrom and connected to said non-reversing phase switch for rotating to operate said non-reversing phase switch between OPEN and CLOSE position;
- first and second reversing switch lever means movably coupled to said operating shaft and respectively connected to said first and second groups of reversing phase switches for individually rotating to selectively operate said first and second groups of reversing switches between OPEN and CLOSE conditions;
- drive means coupled to said operating shaft and selectively engageable with said first and second reversing switch lever means, for transmitting torque from said operating shaft to one of said reversing switch lever means when engaged therewith;
- locking means selectively engageable with said first and second reversing switch lever means for locking one of said reversing switch lever means when engaged therewith to lock the corresponding group of reversing phase switches in the OPEN position;
- shift link means coupled to said locking means, said drive means, and said first and second reversing switch lever means and operable between NORMAL and REVERSE positions for selectively engaging said locking and drive means with said first and second reversing switch lever means;
- and
- a shift actuator connected to shift link means for moving said shift link means between said NORMAL and REVERSE positions;
- operation of said shift actuator being operable to move said shift link means to said NORMAL position causing said drive means to engage said first reversing switch lever means and said locking means to engage said second reversing switch lever means, whereby subsequent operation of said switch actuator means to the CLOSE position rotates said operating shaft to result in closing of said non-reversing phase switch and of said first group of reversing phase switches and locking of said second group of reversing phase switches in an open circuit condition;
- operation of said shift actuator to move said shift link means to said REVERSE position causing said drive means to engage said second reversing switch lever means and said locking means to engage said first reversing switch lever means whereby subsequent operation of said switch actuator means to the CLOSE position rotates said operating shaft to result in closing of said non-reversing phase switch and said second group of reversing phase switches, and locking of said first group of reversing phase switches in an open circuit condition.
Dependencies are inferred from the claim text.