According to an aspect, a releasable actuation system includes a support member, a carriage movable relative to the support member, a releasable mount configured to couple the support member to a frame, the support member being rotatable relative to the releasable mount by a rotatable joint, an image capturing sensor connected to the carriage, an actuator connected to the carriage and operable to adjust a position of a switch, a memory having computer readable instructions, and one or more processors for executing the computer readable instructions, the computer readable instructions controlling the one or more processors to perform operations comprising directing the actuator to adjust the position of the switch.

Embodiments of the disclosure can include an inertial short-circuit and seismic hook for an electrical equipment disconnect switch.

Embodiments of the disclosure can include an inertial short-circuit and seismic hook for an electrical equipment disconnect switch.

A control device for commercially available high voltage capacitor switches to close the circuit on electric utility power factor correction shunt capacitors or motor start assistance shunt capacitors precisely as each phase of the AC power source passes through zero volts.

A control device for commercially available high voltage capacitor switches to close the circuit on electric utility power factor correction shunt capacitors or motor start assistance shunt capacitors precisely as each phase of the AC power source passes through zero volts.

Embodiments of the disclosure can include an inertial short-circuit and seismic hook for an electrical equipment disconnect switch.

Embodiments of the disclosure can include an inertial short-circuit and seismic hook for an electrical equipment disconnect switch.

A switching device for low or medium voltage electric power distribution network, the switching device including one or more electric poles, each electric pole including: an insulating housing extending along a longitudinal axis and fixed to a main support structure of the switching device; a first pole terminal and a second pole terminal electrically connectable with a corresponding phase conductor of an electric power source and with a corresponding load conductor of an electric load, respectively; a movable contact and a fixed contact, which are electrically coupleable or decoupleable one with or from another upon a movement of the movable contact towards or away from the fixed contact, the fixed contact being electrically connected with the first pole terminal, the movable contact being electrically connectable with the second pole terminal; a movable circuit assembly including a plurality of semiconductor devices adapted to switch in a conduction state or in an interdiction state depending on the voltage applied thereto, the semiconductor devices being electrically connected in series one to another in such a way that a current can flow according to a predefined conduction direction when the semiconductor devices are in a conduction state, the movable circuit assembly including first and second assembly terminals for the plurality of semiconductor devices. The movable circuit assembly is operatively coupled with the movable contact and moves together with the movable contact during a movement of the movable contact towards or away from the fixed contact, the semiconductor devices switching in a conduction on state or in an interdiction state depending on the position of the movable contact.

A switching device for low or medium voltage electric power distribution network, the switching device including one or more electric poles, each electric pole including: an insulating housing extending along a longitudinal axis and fixed to a main support structure of the switching device; a first pole terminal and a second pole terminal electrically connectable with a corresponding phase conductor of an electric power source and with a corresponding load conductor of an electric load, respectively; a movable contact and a fixed contact, which are electrically coupleable or decoupleable one with or from another upon a movement of the movable contact towards or away from the fixed contact, the fixed contact being electrically connected with the first pole terminal, the movable contact being electrically connectable with the second pole terminal; a movable circuit assembly including a plurality of semiconductor devices adapted to switch in a conduction state or in an interdiction state depending on the voltage applied thereto, the semiconductor devices being electrically connected in series one to another in such a way that a current can flow according to a predefined conduction direction when the semiconductor devices are in a conduction state, the movable circuit assembly including first and second assembly terminals for the plurality of semiconductor devices. The movable circuit assembly is operatively coupled with the movable contact and moves together with the movable contact during a movement of the movable contact towards or away from the fixed contact, the semiconductor devices switching in a conduction on state or in an interdiction state depending on the position of the movable contact.

An on-load tap changer is provided having a plurality of modules, each of which is operable to change taps in a transformer winding. The tap changer includes a motor connected to rotate at least one shaft. The at least one shaft is connected to the tap change modules and is operable upon rotation to cause the tap change modules to each perform a sequence of operations that effectuate a tap change. A multi-turn absolute encoder is connected to the at least one shaft. A monitoring system is connected to the encoder and is operable to determine from the position of the at least one shaft where the tap change modules are in the sequence of operations.