Aspects and techniques of the present disclosure relate to enclosures, such as, electrical enclosures, for example, explosion-proof enclosures, and including advantageous features and methods usable with such enclosures. Disclosed features and techniques relate to: an enclosure fastening device; a visual indicator; an enclosure handling assist arrangement; a control handle; and a reset controller.

A circuit forming method is a method for forming a circuit in which an electrical component and an intrinsically safe explosion-proof related device are electrically connected, in a facility where the electrical component is disposed in a hazardous area and the intrinsically safe explosion-proof related device for limiting a current is disposed in a non-hazardous area. In this method, a first connector to be electrically connected to the electrical component and a second connector to be electrically connected to the intrinsically safe explosion-proof related device are connected in the hazardous area, thereby forming the circuit in which the current is limited by the intrinsically safe explosion-proof related device and grounding a shielding pin provided in the first connector or the second connector only at one position in the non-hazardous area.

An actuator system for operating a switch is described herein. The actuator system can include a shaft of a handle assembly. The shaft couples to a handle and a male coupling element and has a number of positions. Further, a coupling body of a switch assembly can be positioned in the number of positions. The coupling body engages the switch and has a female coupling element, which has a slotted portion that receives the male coupling element and an angled terminus that aligns the shaft to a first position as the shaft couples to the coupling body. The slotted portion receives and engages the male coupling element when the shaft is coupled to the coupling body. The slotted portion prevents the male coupling element from disengaging when the coupling body is in a second position, and disengages the male coupling element when the coupling body is in the first position.

Aspects and techniques of the present disclosure relate to enclosures, such as, electrical enclosures, for example, explosion-proof enclosures, and including advantageous features and methods usable with such enclosures. Disclosed features and techniques relate to: an enclosure fastening device; a visual indicator; an enclosure handling assist arrangement; a control handle; and a reset controller.

A three-stage control mechanism of an explosion-proof switch has a rotating unit and an interconnecting unit. The rotating unit has a first drive portion and a second drive portion that are selectively operated and reciprocated. The interconnecting unit includes a retaining seat and a connecting member. A switch unit is connected to the connecting member. An intermediate sleeve is insertedly connected to the connecting member and extends into the retaining seat. An outer sleeve is tightly sleeved on an outer wall of the intermediate sleeve. The outer sleeve is in tight fit with the retaining seat. A movable cover is provided between the outer sleeve and the rotating unit. A connecting rod assembly includes a first connecting rod and a second connecting rod that are inserted in the intermediate sleeve. The first and second connecting rods are respectively driven by the first and second drive portions.

A contactor, and an air conditioning system incorporating the contactor are provided. The contactor includes a body with an upper surface, a line-side electrical terminal located on one end of the body, a load-side electrical terminal located on the other side of the body, a switching element within the body, the switching element coupled between the line-side electrical terminal and the load-side electrical terminal, and a refrigerant mitigating element disposed on the upper surface. The line-side electrical terminal is configured to receive electrical power from an electrical grid. The load-side electrical terminal is configured to transfer at least a portion of the electrical power to at least one component of the outdoor unit. The switching element is configured to electrically connect the line-side electrical terminal and the load-side electrical terminal when activated. The refrigerant mitigating element may help mitigate the ignition of a refrigerant.

A casing for a temperature-dependent switch that switches in a temperature-dependent manner between a closed state, in which the switch establishes an electrically conductive connection between first and second external terminals, and an open state, in which the switch disconnects the electrically conductive connection. The casing comprises: a first casing part made of metal; a second casing part made of metal connected to the first casing part via a hermetically sealing, material-locking connection comprising an electrically insulating connection material; a receptacle for receiving the temperature-dependent switch, wherein the receptacle is at least partially surrounded by the first and second casing parts; a first connection lead led through the electrically insulating connection material for electrical connection to the first external terminal; and a second connection lead led through the electrically insulating connection material for electrical connection to the second external terminal.

A casing for receiving, in a hermetically sealed manner, a temperature-dependent switch that switches in a temperature-dependent manner between a closed state, in which the switch establishes an electrically conductive connection between a first external terminal and a second external terminal, and an open state, in which the switch disconnects the electrically conductive connection. The casing comprises a first metal casing part; a second metal casing part fixed to the first metal casing part via a hermetically sealing, electrically insulating connection; and a third electrically insulating casing part arranged between the first and second metal casing parts. The first and second metal casing parts together form a receptacle for the temperature-dependent switch, in which the switch, when inserted into the receptacle, is electrically connected to the first metal casing part by its first external terminal and electrically connected to the second metal casing part by its second external terminal.

An explosion-proof arrangement (20) having a bushing part (23) with a bushing opening (24) that defines a bushing surface (25) and a structural unit (29) arranged in the bushing opening (24). The structural unit (29) includes a deformable inner body (31) with at least one conductor channel (32) extending through in a longitudinal direction (L), and a plastically deformable connecting sleeve (30) surrounding the inner body (31). At least one conductor (21) is guided through its own associated conductor channel (32) in the inner body (31). A connecting portion (33) of the connecting sleeve (30) is plastically deformed so that it presses radially inwardly on the inner body (31) and deforms it in a radial direction (R). A first delimiting surface (35) is formed on an outer circumference of the plastically deformed connecting portion (33). The bushing surface (25) forms a second delimiting surface (36). By arranging the structural unit (29) with the first delimiting surface (35) in the bushing opening (24), a flameproof Ex gap (37) is produced between the two delimiting surfaces (35, 36).

The invention is an arrangement for the touchless operation of an apparatus of measuring technology with an input and output unit which comprises at least a control unit a display unit coupled to the control unit, and an input unit coupled to the control unit, with the input device comprising at least one magnetic field sensor with a three-dimensional magnetic field detection and a magnetic control element cooperating with the magnetic field sensor.