The invention relates to a bursting device (1) for a high-voltage device (2). The bursting device (1) is suitable in particular for on-load tap changers or high-voltage transformers filled with a filling medium such as gas or oil. The bursting device (1) according to the invention has a bursting cork (3) with support blocks (7) arranged on the inner surface (3B). A shear pin (8) is in arranged in each receiving block (7), said shear pin being divided into a first portion (8A) and a second portion (8B). The first portion (8A) of the shear pin (8) protrudes into the receiving block (7). The second portion (8B) of the shear pin (8) is arranged below the circumferential edge (9) of an opening (5) of the high-voltage device (2).

The invention relates to a bursting device (1) for a high-voltage device (2). The bursting device (1) is suitable in particular for on-load tap changers or high-voltage transformers filled with a filling medium such as gas or oil. The bursting device (1) according to the invention has a bursting cork (3) with support blocks (7) arranged on the inner surface (3B). A shear pin (8) is in arranged in each receiving block (7), said shear pin being divided into a first portion (8A) and a second portion (8B). The first portion (8A) of the shear pin (8) protrudes into the receiving block (7). The second portion (8B) of the shear pin (8) is arranged below the circumferential edge (9) of an opening (5) of the high-voltage device (2).

An electrical transmission system is described herein. The electrical transmission system can include at least one first phase high-voltage conductor. The electrical transmission system can also include an arrester coupled to the at least one first phase high-voltage conductor, where the arrester includes an arrester body and an isolator, where the arrester body includes a top end and a bottom end, where the top end of the arrester is coupled to the at least one first phase high-voltage conductor, and where the bottom end of the arrester body is coupled to the isolator. The electrical transmission system can further include a ground conductor coupled to a bottom end of the isolator of the arrester. The electrical transmission system can also include a tether coupled to the ground conductor, where the tether comprises a distal end, where the distal end of the tether is coupled to the arrester above the isolator.

An electrical transmission system is described herein. The electrical transmission system can include at least one first phase high-voltage conductor. The electrical transmission system can also include an arrester coupled to the at least one first phase high-voltage conductor, where the arrester includes an arrester body and an isolator, where the arrester body includes a top end and a bottom end, where the top end of the arrester is coupled to the at least one first phase high-voltage conductor, and where the bottom end of the arrester body is coupled to the isolator. The electrical transmission system can further include a ground conductor coupled to a bottom end of the isolator of the arrester. The electrical transmission system can also include a tether coupled to the ground conductor, where the tether comprises a distal end, where the distal end of the tether is coupled to the arrester above the isolator.

An arrangement for interrupting current comprises a first and a second terminal. First, second, and third parallel circuit branches are arranged between the terminals to electrically connect two power networks. The first parallel circuit branch comprises a mechanical main circuit breaker, the second parallel circuit branch comprises an energy absorbing device, and the third parallel circuit branch comprises a resonant circuit and a voltage control means arranged in series. The voltage control means is controllable to inject energy into the resonant circuit to force a rapid increase of alternating current, wherein the alternating current flows in a loop containing the first and the third parallel circuit branches as the mechanical main circuit breaker is controlled to open to interrupt main current. Zero cross-over of the current through the mechanical main circuit breaker is thereby realized as the alternating current amplitude exceeds the main current amplitude.

A dropout recloser is capable of in accordance with its operating programming after a predetermined number of fault interrupting operations, e.g., 1, 2, 3 or more but typically 3, to drop out of a cutout and hang freely in a hinge contact of the cutout providing sectionalization with an observable visible gap. The recloser includes fault interrupting and reclosing components, a drop out mechanism and a controller. The drop out mechanism may include a bi-stable actuator to affect fault interrupting operation and dropout operation. The device may include motion limiting structures. The recloser may have a number of operating modes or sequences.

In a method and apparatus, an electrical load is disposed across an electric power source. First and second electrical components are disposed between first and second terminals, respectively, and the load and power source. An open circuit is defined between the first and second terminals in absence of a test meter. The first electrical component is configured so that the first component passes at most a low level electric current to the first terminal upon a short circuit condition. The second electrical component is configured so that the second component passes at most a low level electric current to the second terminal upon a short circuit condition.