A terminal block for use with a railroad terminal board may include a terminal block body comprising first and second sides, a plurality of first connection posts extending from the first side of the body, and a second connection post extending from the second side of the body. The second connection post may be connected to one of the plurality of first connection posts. The second connection post may be configured to mount the terminal block to the railroad terminal board. The terminal block body may include a single hole extending through the first and second sides and configured to accept a mounting screw for mounting the terminal block to the railroad terminal board.

An electrical terminal block with simplified switching operations, which can be produced in a cost-effective and time-saving manner.

An electric terminal block having a terminal housing, two conductor connection elements in the housing, and two current bars. Each current bar has a connection portion and a resilient contact portion. Each connection portion is paired with a respective conductor connection element, and the contact portions together form a contact region for receiving and contacting the plug of a test plug or disconnecting plug. The contact portions contact each other when no plug is plugged in such that the two conductor connection elements are electrically connected together via the two current bars. A transverse connection between two conductor connection elements of two adjacent terminal blocks is produced automatically when a test plug or disconnecting plug is plugged onto the terminal blocks. The terminal housing has two spring elements that have a resilient contact portion; the contact portions of the spring elements together form an additional contact region for the plug.

An electric terminal block having a block housing, two conductor connection elements, two current bars, and two additional current bar pieces. Each current bar has a connection portion, and first and second contact portions, each connection portion being paired with a conductor connection element. To obtain a reliable switching sequence when plugging and unplugging an operating or test plug, the terminal housing is equipped with two spring elements, each of which has a connection portion and an elastic contact portion; each of the spring elements is electrically connected to one of the current bar pieces; the contact portions together form a second contact region for receiving the plug, and being mutually spaced when the plug is not plugged in. The contact region of the spring elements is arranged in front of the contact region of the current bars in the plug-in direction of the plug.

An electric terminal block having a block housing, two conductor connection elements, two current bars, and two additional current bar pieces. Each current bar has a connection portion, and first and second contact portions, each connection portion being paired with a conductor connection element. To obtain a reliable switching sequence when plugging and unplugging an operating or test plug, the terminal housing is equipped with two spring elements, each of which has a connection portion and an elastic contact portion; each of the spring elements is electrically connected to one of the current bar pieces; the contact portions together form a second contact region for receiving the plug, and being mutually spaced when the plug is not plugged in. The contact region of the spring elements is arranged in front of the contact region of the current bars in the plug-in direction of the plug.

An electric terminal block having a terminal housing, two conductor connection elements in the housing, and two current bars. Each current bar has a connection portion and a resilient contact portion. Each connection portion is paired with a respective conductor connection element, and the contact portions together form a contact region for receiving and contacting the plug of a test plug or disconnecting plug. The contact portions contact each other when no plug is plugged in such that the two conductor connection elements are electrically connected together via the two current bars. A transverse connection between two conductor connection elements of two adjacent terminal blocks is produced automatically when a test plug or disconnecting plug is plugged onto the terminal blocks. The terminal housing has two spring elements that have a resilient contact portion; the contact portions of the spring elements together form an additional contact region for the plug.

A terminal unit has a terminal unit body, a first terminal connector located adjacent a first opening in the terminal unit body for connection of a first conductor passing through the first opening, and a second terminal connector located adjacent a second opening in the terminal unit body for connection of a second conductor passing through the second opening. The first terminal connector conductor terminates internally of the terminal unit at a first link connection point, and the second terminal connector conductor terminates internally of the terminal unit at a second link connection point. The first and second link connection points are accessible via a link opening in the terminal unit body and a removable link comprising a link conductor and a link handle is removably insertable into the link opening. With the removable link inserted a normal orientation, the link conductor electrically connects the first link connection point and the second link connection point to electrically connect the first terminal connector to the second terminal connector. The link handle comprises an insulator which projects from the opening when the link conductor is inserted in normal orientation to electrically connect the first link connection point and the second link connection point, such that the link handle enables gripping of the link for removal without touching the link conductor.

A terminal unit has a terminal unit body, a first terminal connector located adjacent a first opening in the terminal unit body for connection of a first conductor passing through the first opening, and a second terminal connector located adjacent a second opening in the terminal unit body for connection of a second conductor passing through the second opening. The first terminal connector conductor terminates internally of the terminal unit at a first link connection point, and the second terminal connector conductor terminates internally of the terminal unit at a second link connection point. The first and second link connection points are accessible via a link opening in the terminal unit body and a removable link comprising a link conductor and a link handle is removably insertable into the link opening. With the removable link inserted a normal orientation, the link conductor electrically connects the first link connection point and the second link connection point to electrically connect the first terminal connector to the second terminal connector.

An interface test device for testing a circuit, the interface test device including a module configured to open and close a medium to high voltage monitoring circuit, the module having at least one pair of contacts biased towards each other that are electrically connected and in line with the medium to high voltage monitoring circuit; at least one pair of insulated jacks, wherein the at least one pair of insulated jacks is connected to the medium to high voltage monitoring circuit before or substantially simultaneously with the medium to high voltage monitoring circuit being opened; at least one disconnect plug that is insertable into the module through at least one parking opening into at least one parking position and insertable into the module through at least one disconnect opening into at least one disconnect position.

A test plug block for plugging onto a series terminal block has a plurality of interconnected test plugs and two securing parts which are arranged on both sides of the plurality of test plugs having a plug-in portion and which are connected to each other via a handle. Plugging of the test plug block onto the series terminal block is simplified in that each plug-in portion of the securing parts has two latching elements which, together with corresponding counter latching elements of the securing clamps determine a first latched position and a second latched position of the securing parts in the securing clamp, wherein the two latched positions are arranged one behind the other in the plug-on direction of the test plug block. An unlocking element is movably arranged in the housing of each securing part from a base position into first and second unlocking positions by rotating the handle.