A lattice tower for high-voltage overhead transmission lines having a lattice structure is provided that includes: a base anchored to the ground; a top portion designed for anchoring first and second conductors of a high-voltage overhead transmission line; and a body which extends between the base and the top portion. The lattice tower includes a grid high-voltage electric switching substation that includes: GIS-technology-based switchgear equipment arranged within the base of the lattice structure; a first loop-in loop-out feeder connection configured to connect the first conductors of the high-voltage overhead transmission line to the GIS-technology-based switchgear equipment and made by insulated cables or GIS-technology-based ducts, or by mixed solutions wherein a first portion is made by bare conductors and a second portion is made by insulated cables or GIS-technology-based ducts; a second loop-in loop-out feeder connection configured to connect the second conductors of the high-voltage overhead transmission line to the GIS-technology-based switchgear equipment and made by insulated cables or GIS-technology-based ducts, or by mixed solutions, wherein a first portion is made by bare conductors and a second portion is made by insulated cables or GIS-technology-based ducts; and a protection, command and control system arranged within the lattice structure, or in proximity to the base of said lattice structure; wherein the GIS-technology-based switchgear equipment is designed to be connected also to a user connection line.

A lattice tower for high-voltage overhead transmission lines having a lattice structure is provided that includes: a base anchored to the ground; a top portion designed for anchoring first and second conductors of a high-voltage overhead transmission line; and a body which extends between the base and the top portion. The lattice tower includes a grid high-voltage electric switching substation that includes: GIS-technology-based switchgear equipment arranged within the base of the lattice structure; a first loop-in loop-out feeder connection configured to connect the first conductors of the high-voltage overhead transmission line to the GIS-technology-based switchgear equipment and made by insulated cables or GIS-technology-based ducts, or by mixed solutions wherein a first portion is made by bare conductors and a second portion is made by insulated cables or GIS-technology-based ducts; a second loop-in loop-out feeder connection configured to connect the second conductors of the high-voltage overhead transmission line to the GIS-technology-based switchgear equipment and made by insulated cables or GIS-technology-based ducts, or by mixed solutions, wherein a first portion is made by bare conductors and a second portion is made by insulated cables or GIS-technology-based ducts; and a protection, command and control system arranged within the lattice structure, or in proximity to the base of said lattice structure; wherein the GIS-technology-based switchgear equipment is designed to be connected also to a user connection line.

A modular, space-efficient support structure mounts multiple electrical devices. The structure is modular to allow for subsequent addition and removal of electrical devices by adding and removing primary structural elements coupled for structural efficiency. The structure is deployable in many locations without reconfiguration and has reduced dependence on local site conditions. The structure uses non-permanent construction methods to facilitate rapid assembly, disassembly, re-deployment and re-use of components. Multiple electrical devices such as transformers are mounted at elevation on device mounting columns. The electrical devices are interconnected to each other in parallel or series with connectors mounted on the top portion of the device to allow maintenance clearance underneath. The arrangement of the electrical devices maximizes the density of the devices while maintaining vertical, lateral and radial safety clearances. The electrical devices are arranged in a symmetrical fashion around the primary structural element for symmetrical load distribution.

An integrated assembly includes a switchgear apparatus for operation at voltages up to 72.5 kV and a mount assembly for coupling to a pole and to support the switchgear apparatus. The mount assembly includes a crossbar, a pole mount, a mounting bracket to support the switchgear apparatus, and a pair of crossbar mounts for supporting the mounting bracket on the crossbar at different positions. Each crossbar mount includes a first arm, a second arm spaced from the first arm and extending parallel to the first arm, a third arm extending between and coupled to a distal end of each of the first and second arms, and a flange extending between and coupled to a proximal end of each of the first and second arms. The flange extends parallel to the third arm. The first, second, and third arms and the flange form an enclosed space to receive the crossbar.

A tower mounted high voltage gas-insulated switchgear including a supporting structure connected to the lattice structure of a high voltage transmission tower, a first and a second combined interruption and disconnection modules respectively including for each phase, a first and a second combined interruption and disconnection units, a first combined disconnecting and earthing switch having a first fixed contact operatively coupled to said first terminal, a second fixed contact at ground potential and a first movable contact operatively couplable to said first and second fixed contacts for disconnecting and earthing operations; a fast earthing switch interposed between said first fixed contact and said first terminal, a circuit breaker unit electrically connected to said first movable contact of said first combined disconnecting and earthing switch and to a second combined disconnecting and earthing switch.

A pole attachable enclosure is installable, replaceable, and accessible from ground level on poles installed in various deployments for camera, lights, and antennas. The pole attachable enclosure provides a secure, tamper resistant enclosure for electronic and support equipment in both new and retrofit installations to improve serviceability and protect investment.

A pole attachable enclosure is installable, replaceable, and accessible from ground level on poles installed in various deployments for camera, lights, and antennas. The pole attachable enclosure provides a secure, tamper resistant enclosure for electronic and support equipment in both new and retrofit installations to improve serviceability and protect investment.

A tower for a high-voltage overhead electric transmission line has a predetermined shape defining an internal volume of the tower, and carries a first tension side of a first line section and a second tension side of a second line section. The first and second tension sides have respective pluralities of first and second tension terminals, each associated with a respective phase of the high-voltage overhead electric transmission line. The tower supports a switchgear unit connected at a first end to the first line section and at a second end to the second line section and configured to modify grid configuration, interrupting and restoring electrical continuity in pre-established points, to interrupt nominal and fault currents, and to carry out safety operations. The switchgear unit has a plurality of switchgear unit poles, each associated with a respective phase of the high-voltage overhead electric transmission line and including a line circuit breaker and at least one line disconnector.

A tower for a high-voltage overhead electric transmission line has a predetermined shape defining an internal volume of the tower, and carries a first tension side of a first line section and a second tension side of a second line section. The first and second tension sides have respective pluralities of first and second tension terminals, each associated with a respective phase of the high-voltage overhead electric transmission line. The tower supports a switchgear unit connected at a first end to the first line section and at a second end to the second line section and configured to modify grid configuration, interrupting and restoring electrical continuity in pre-established points, to interrupt nominal and fault currents, and to carry out safety operations. The switchgear unit has a plurality of switchgear unit poles, each associated with a respective phase of the high-voltage overhead electric transmission line and including a line circuit breaker and at least one line disconnector.

A polymeric tank for housing power components in a dry or fluid filled environment is disclosed. A mounting receptacle and plug pair used to secure the power components within the interior walls of the tank. The mounting receptacle configured to be an integral part of the interior wall. A permeable shield is insertable within the interior walls of the tank to safeguard against electromagnetic radiation.