An interlocking arrangement for switching devices for blocking the operation of the switching device when a feeder door is open, including a feeder assembly with an interlock and a racking screw interlock assembly. The feeder assembly includes a switching device mounted on a feeder base plate of the feeder assembly and mechanically connected with an interlock slider by a locking clutch cable. The racking screw interlock assembly is mounted to the feeder channel by an interlock base plate, the racking screw interlock assembly including an interlock base plate to accommodate the locking clutch cable. The interlock slider is slidably mounted on the baseplate by a plurality of step screws and slots provided on the base plate.

An interlocking arrangement for switching devices for blocking the operation of the switching device when a feeder door is open, including a feeder assembly with an interlock and a racking screw interlock assembly. The feeder assembly includes a switching device mounted on a feeder base plate of the feeder assembly and mechanically connected with an interlock slider by a locking clutch cable. The racking screw interlock assembly is mounted to the feeder channel by an interlock base plate, the racking screw interlock assembly including an interlock base plate to accommodate the locking clutch cable. The interlock slider is slidably mounted on the baseplate by a plurality of step screws and slots provided on the base plate.

The present disclosure relates to a distributing board having a position lock device and, more specifically, having a position lock device which can hold or release, at a specific position, an electric power device unit. The distributing board having a position lock device, according to one embodiment of the present disclosure, comprises an external case and an electric power device unit drawn into and out of the external case, and further comprises: a position setting bracket which is fixed to the external case and has convex-concave parts for setting the position of the electric power device unit; and a lock device which moves with the electric power device unit by being coupled to a portion of the electric power device unit, and which restricts or allows movement of the electric power device unit by being hooked into or released from the positions of the position setting bracket.

The present disclosure relates to a distributing board having a position lock device and, more specifically, having a position lock device which can hold or release, at a specific position, an electric power device unit. The distributing board having a position lock device, according to one embodiment of the present disclosure, comprises an external case and an electric power device unit drawn into and out of the external case, and further comprises: a position setting bracket which is fixed to the external case and has convex-concave parts for setting the position of the electric power device unit; and a lock device which moves with the electric power device unit by being coupled to a portion of the electric power device unit, and which restricts or allows movement of the electric power device unit by being hooked into or released from the positions of the position setting bracket.

A motor control center includes an enclosure comprising an isolation switch, a main contactor device, and a ground switch device. The isolation switch is selectively manually operable between a connected state and a disconnected state. In the connected state the isolation switch is adapted to conduct electrical power from an associated power source to the main contactor device and wherein the isolation switch in the disconnected state interrupts conduction of electrical power from the associated power source to the main contactor device. The main contactor device is selectively operable between a conductive state and a non-conductive state, wherein the main contactor device is adapted to electrically connect the isolation switch to the ground switch device and to an associated electrical load when the main contactor device is in its conductive state and wherein the main contactor device disconnects said isolation switch from the ground switch device and the associated electrical load when the main contactor device is in its non-conductive state. The ground switch device is manually operable from an open, ungrounded state in which the main contactor device is electrically disconnected from a ground path to a closed, grounded state in which the main contactor device is electrically connected to the ground path. The motor control center further includes a first interlock device operably connected between the isolation switch and the ground switch device, wherein the first interlock device prevents movement of the isolation switch from the disconnected state to the connected state when the ground switch device is in the grounded state.

A motor control center includes an enclosure comprising an isolation switch, a main contactor device, and a ground switch device. The isolation switch is selectively manually operable between a connected state and a disconnected state. In the connected state the isolation switch is adapted to conduct electrical power from an associated power source to the main contactor device and wherein the isolation switch in the disconnected state interrupts conduction of electrical power from the associated power source to the main contactor device. The main contactor device is selectively operable between a conductive state and a non-conductive state, wherein the main contactor device is adapted to electrically connect the isolation switch to the ground switch device and to an associated electrical load when the main contactor device is in its conductive state and wherein the main contactor device disconnects said isolation switch from the ground switch device and the associated electrical load when the main contactor device is in its non-conductive state. The ground switch device is manually operable from an open, ungrounded state in which the main contactor device is electrically disconnected from a ground path to a closed, grounded state in which the main contactor device is electrically connected to the ground path. The motor control center further includes a first interlock device operably connected between the isolation switch and the ground switch device, wherein the first interlock device prevents movement of the isolation switch from the disconnected state to the connected state when the ground switch device is in the grounded state.

An apparatus to retain modules within a Motor Control Center (MCC) includes a plate mounted to each side of the module housing and at least one spring mounted to each plate within the module housing. The plate includes a hook at one end which connects to and pivots about an opening in the module while retaining the plate to the module. The plate also includes a retaining member extending through an opening in the module housing and configured to receive one end of the spring. The spring is under tension when connected between the retaining member of the plate and the module housing, pulling the retaining member toward the module housing. A biasing member which engages the housing of the MCC as the module is inserted is compressed toward the module during insertion. The spring pushes the biasing member outward after insertion, positively retaining the module to the MCC.

An apparatus for interlocking the connection handle of a module for a motor control center (MCC) engages a locking plate to prevent inadvertent motion of the connection handle. When the apparatus is not pressed, it allows the locking plate to fully engage the connection handle, preventing the connection handle from changing position. When the apparatus is in a first angular orientation, it may only be pressed into the module for a first depth. At the first depth, the apparatus engages the locking plate to allow the connection handle to transition between an off position and a test position. When the apparatus is rotated to a second angular orientation, it may be pressed into the module for a second depth. At the second depth, the apparatus causes the locking plate to disengage the connection handle, allowing the connection handle to be moved between any desired position.

A racked in and out circuit breaker for a cubical housing of electrical switchgear has a back to front, threaded rod mechanism and, at the rear of the cubical a stationary and interior threaded bolt is provided so that when the rod is turned the circuit breaker is mechanically pulled into the cubical and, if turned oppositely, causes the circuit breaker to move out of the cubical housing. A non-threaded section of the rod cooperates with the same bolt so that when it is within the threads of the bolt, further effort at rotating the rod prevents further rearward movement of the circuit breaker.

A racked in and out circuit breaker for a cubical housing of electrical switchgear has a back to front, threaded rod mechanism and, at the rear of the cubical a stationary and interior threaded bolt is provided so that when the rod is turned the circuit breaker is mechanically pulled into the cubical and, if turned oppositely, causes the circuit breaker to move out of the cubical housing. A non-threaded section of the rod cooperates with the same bolt so that when it is within the threads of the bolt, further effort at rotating the rod prevents further rearward movement of the circuit breaker.