A method for controlling a target switch assembly in a chain of switch assemblies includes distributing the chain of switch assemblies in a wellbore; placing a controller at a head of the wellbore; making a first decision, at the controller, to actuate a corresponding detonator of the target switch assembly; transmitting, from the controller to the target switch assembly, a fire command to activate the corresponding detonator; and making a second decision, locally, at the target switch assembly, to activate the detonator, after the fire command from the controller is received.

A switch device structure includes an assembly of a main body and an operation body. An electrical connection module and an elastic unit are mounted on the main body. The contact arm of the electrical connection module has a first member and/or a second member with variable arrangement position. According to the position or motion of the operation body, the elastic unit provides an elastic force to push the contact arm of the electrical connection module into a contacting circuit closed state or make the elastic unit separate from the contact arm to form a circuit open state. The arrangement form of the first member and/or the second member of the contact arm of the electrical connection module is variable in accordance with the specification of the switch to achieve NO mode and NC mode.

A switch device structure includes an assembly of a main body and an operation body. An electrical connection module and an elastic unit are mounted on the main body. The contact arm of the electrical connection module has a first member and/or a second member with variable arrangement position. According to the position or motion of the operation body, the elastic unit provides an elastic force to push the contact arm of the electrical connection module into a contacting circuit closed state or make the elastic unit separate from the contact arm to form a circuit open state. The arrangement form of the first member and/or the second member of the contact arm of the electrical connection module is variable in accordance with the specification of the switch to achieve NO mode and NC mode.

Apparatus for switching an electrical load circuit operated at high voltage are disclosed. The embodiments described herein include a device for controlling the switching of a high voltage circuit such that both the connection and disconnection can be carried out in a simple and reliable manner. Embodiments described herein can also prevent the unintentional opening of the switching device which can greatly extend the service life of the switching circuitry. Moreover, the apparatus disclosed herein reliably prevent the formation of an arc during switching by enabling the switching operation to take place without a load.

Apparatus for switching an electrical load circuit operated at high voltage are disclosed. The embodiments described herein include a device for controlling the switching of a high voltage circuit such that both the connection and disconnection can be carried out in a simple and reliable manner. Embodiments described herein can also prevent the unintentional opening of the switching device which can greatly extend the service life of the switching circuitry. Moreover, the apparatus disclosed herein reliably prevent the formation of an arc during switching by enabling the switching operation to take place without a load.

A switch assembly, which is part of a chain of switch assemblies, includes a communication unit (CU) configured to receive, from an external controller, a fire command to activate a detonator and a computing core (CC) configured to locally make a decision whether or not to activate the detonator, after receiving the fire command to activate the detonator.

A quick tripping device with a moving contact mechanism that includes a contact support and a moving contact. An operating mechanism is in driving connection with the moving contact mechanism, so that the moving contact and a static contact are switched on or off. A first push rod is pivotally disposed on the contact support with one end in driving fit with the moving contact, a driving gap is formed between the one end and the moving contact, and a first push rod driving end of the first push rod is in driving fit with the operating mechanism to trip the operating mechanism. When the moving contact is repelled, the moving contact rotates relative to the contact support through the driving gap, and then contacts with the first push rod driven end and drives the first push rod to rotate, so that the operating mechanism is tripped.

A relay, including a first fixed contact, a second fixed contact, a movable contact piece having first and second movable contacts, a contact piece holding unit configured to hold the movable contact piece, a magnet for arc extinguishing, and a debris suction unit configured to exert a magnetic force to suck debris, is disclosed. A first contact position between the first fixed contact and the first movable contact is located between the magnet for arc extinguishing and the contact piece holding unit in a longitudinal direction of the movable contact piece. The debris suction unit is disposed so that the first contact position does not overlap a region between the debris suction unit and the contact piece holding unit. A magnet force exerted by the debris suction unit in the contact piece holding unit is larger than a magnetic force exerted by the magnet in the contact piece holding unit.

A key module includes an actuation element with a cam nose and a contactor unit with a contact nose movable in the direction of the movement axis and transverse to the direction of the movement axis. Also, a contact element is formed and arranged for establishing electric contact with the contact nose. Moreover, the housing element accommodates the contact element, the contactor unit and the actuation element, wherein the actuation element and/or the cam nose includes a constructive element formed to deflect the contact nose from a rest position adjacent to the contact element in the direction along and/or transverse to the movement axis upon a defined movement of the actuation element, then abruptly release it so that the movable contact nose returns to the rest position and strikes the contact element and/or the housing element. Electric contact with the contact element is established and acoustic noise is produced.

A key module includes an actuation element with a cam nose and a contactor unit with a contact nose movable in the direction of the movement axis and transverse to the direction of the movement axis. Also, a contact element is formed and arranged for establishing electric contact with the contact nose. Moreover, the housing element accommodates the contact element, the contactor unit and the actuation element, wherein the actuation element and/or the cam nose includes a constructive element formed to deflect the contact nose from a rest position adjacent to the contact element in the direction along and/or transverse to the movement axis upon a defined movement of the actuation element, then abruptly release it so that the movable contact nose returns to the rest position and strikes the contact element and/or the housing element. Electric contact with the contact element is established and acoustic noise is produced.