Abstract: The main body frame includes a first frame including a flexible protruding plate portion, a second frame facing the first frame in a first direction to form the housing section, and a snap-fit mechanism connecting the first frame to the second frame. The snap-fit mechanism includes a fitted portion provided on the flexible protruding plate portion and a fitting projection portion provided on a side wall of the second frame and fitting with the fitted portion. The fitting projection portion and the fitted portion are fitted by bringing the first and second frames into relative proximity in the first direction, and the fitting is released by relatively displacing the first and second frames in a second direction orthogonal to the first direction.

Abstract: An electromagnetic contactor including: an arc-extinguishing chamber in which a contact portion is disposed; a case having an arc-extinguishing chamber housing portion in which the arc-extinguishing chamber is housed; and an arc-extinguishing cover mounted on the case and configured to cover the arc-extinguishing chamber housing portion, wherein at least one of the case and the arc-extinguishing cover has a first engaging portion and a second engaging portion, the other has a third engaging portion configured to engage with the first engaging portion and the second engaging portion, and the arc-extinguishing cover is held to the case in either a first state in which the first engaging portion and the third engaging portion are engaged with each other or a second state in which the second engaging portion is engaged with the third engaging portion.

Abstract: A mechanical latching device of an electromagnetic contactor eliminates a need to adjust a gap between portions mechanically preventing returning of a latch support. A latch support includes a protrusion protruding laterally and formed with a latch surface facing a released side. A rotating member has one end side rotatably supported and the other end side biased toward the protrusion. When the latch support is on the released side, an outer peripheral surface of the other end side contacts with a tip of the protrusion to allow the latch support to be displaced to a closed side. When the latch support is on the closed side, the other end side rotates according to a position of the latch support in a displacement direction, and a tip surface faces the latch surface to mechanically prevent the latch support from returning to the released side at plural positions along the displacement direction.

Abstract: There is provided an electric device configured to allow easy replacement of one or more electric components housed in a first frame and a second frame and suppressing relative displacement of the first frame and the second frame to enhance reliability. A bulging wall member of a body frame is formed by a bulging wall member of the first frame and a bulging wall member of the second frame, both members being contiguous in a Z-direction. A relative displacement suppression mechanism configured to suppress relative displacement of an X-direction and a Y-direction is provided in an area in which the bulging wall member and the bulging wall member are contiguous.

Abstract: A case has an engagement hole formed in a side surface thereof in the width direction, a cover has a projecting piece formed thereon, the projecting piece projecting toward the case side, and a tip portion of the projecting piece is fitted into the engagement hole from the inside. A reset bar has a recessed portion formed in a preset range extending in the depth direction and the circumferential direction within the outer peripheral surface of the reset bar and, when positioned at either an initial position or an automatic reset position, prevents the tip portion from being pushed inside by having the outer peripheral surface opposed to the back side of the projecting piece. In addition, when positioned at a manual reset position, the reset bar allows the tip portion to be pushed inside by having the recessed portion opposed to the back side of the projecting piece.

Abstract: A current sensor wound and mounted in a coil shape with at least one winding around a measurement conductor where a primary current flows, the current sensor including: an insulated electrical wire including a core wire having a flexible rod-shaped body and an insulating covering portion covering an outer periphery of the core wire; and a coil thin wire having one end electrically connected to one end side of the core wire, and functioning as a secondary coil by being spirally wound around an outer periphery of the insulating covering portion, wherein an other end of the core wire and an other end of the coil thin wire, which are not electrically connected, are used as output terminals.

Abstract: A hermetically sealed electromagnetic contactor includes a main contact unit (21) configured to open and close an electrical path of a main circuit by moving along a predetermined opening/closing direction, an electromagnet unit (23) configured to switch opening/closing of the main contact unit (21), a container body (12) made of resin inside which the main contact unit (21) and the electromagnet unit (23) are arranged, an auxiliary contact unit (22) disposed outside the container body (12) on one side in the opening/closing direction of the main contact unit (21) and configured to open and close an electrical path of an auxiliary circuit by moving along the opening/closing direction in conjunction with the main contact unit (21), and an auxiliary contact housing portion (13) made of resin inside which the auxiliary contact unit (22) is arranged, the auxiliary contact housing portion (13) communicating with the inside of the container body (12), in which the insides of the container body (12) and the auxiliar

Abstract: A hermetically sealed electromagnetic contactor includes a pair of fixed contact pieces having fixed contacts, a movable contact piece having a pair of movable contacts and capable of coming into contact with and being separated from the fixed contacts of the pair of fixed contact pieces, an electromagnet unit configured to drive the movable contact piece, a hermetically sealed container configured to house the pair of fixed contact pieces, the movable contact piece, and the electromagnet unit in the same space in a hermetically sealed manner and being filled with arc-extinguishing gas, and two pairs of arc-extinguishing permanent magnets arranged inside the hermetically sealed container and configured to stretch arcs generated between the fixed contacts of the pair of fixed contact pieces and the pair of movable contacts of the movable contact piece.

Abstract: A gas filling structure includes a through-hole (91) formed in a hermetically sealed container (11) made of resin to fill the hermetically sealed container (11) with gas and a screw (92) fastened to the through-hole (91) to seal the through-hole (91).

Abstract: A hermetically sealed electromagnetic contactor including: a pair of fixed contact pieces having fixed contacts; a movable contact piece having a pair of movable contacts capable of coming into contact with and being separated from the fixed contacts of the pair of fixed contact pieces; an electromagnet unit configured to drive the movable contact piece; and a hermetically sealed container configured to house the pair of fixed contact pieces and the movable contact piece in a hermetically sealed manner.

Abstract: A hermetically sealed electromagnetic contactor including: a main contact unit including a pair of main fixed contact pieces, each of the main fixed contact pieces having a main fixed contact at one end and a terminal portion to be connected to a main circuit at the other end, and a main movable contact piece having a pair of main movable contacts configured to come into contact with and be separated from the main fixed contacts and configured to open and close an electrical path of the main circuit; a contact support configured to support the main movable contact piece; an electromagnet unit configured to switch opening/closing of the main contact unit via the contact support; and a hermetically sealed container made of resin on an inside of which the main contact unit and the electromagnet unit are arranged, the hermetically sealed container having the inside filled with insulating gas.

Abstract: An auxiliary contact unit to be attached on a side surface of an electromagnetic contactor by a snap-fit, wherein the snap-fit includes: a projecting piece projecting toward the electromagnetic contactor and having a tip end portion engaging with the electromagnetic contactor, the tip end portion being formed in a hook shape; and a release operating portion formed on a base end side of the projecting piece and configured to, by bending when pressed from an outside, cause the tip end portion engaged with the electromagnetic contactor to be released.

Abstract: This auxiliary contact unit includes a case and a case that are divided from each other in the width direction. The case includes a side wall portion and a partition wall portion protruding from a wall surface of the side wall portion toward the case. The case includes a side wall portion having a wall surface with which a tip end of the partition wall portion comes into contact when the case is assembled to the case. A space surrounded by the side wall portion, the partition wall portion, and the side wall portion serves as a contact housing portion. The side wall portion includes a pass-by wall portion protruding from a wall surface toward the side wall portion along the partition wall portion.

Abstract: A mechanical latching device of an electromagnetic contactor eliminates a need to adjust a gap between portions mechanically preventing returning of a latch support. A latch support includes a protrusion protruding laterally and formed with a latch surface facing a released side. A rotating member has one end side rotatably supported and the other end side biased toward the protrusion. When the latch support is on the released side, an outer peripheral surface of the other end side contacts with a tip of the protrusion to allow the latch support to be displaced to a closed side. When the latch support is on the closed side, the other end side rotates according to a position of the latch support in a displacement direction, and a tip surface faces the latch surface to mechanically prevent the latch support from returning to the released side at plural positions along the displacement direction.

Abstract: An electromagnetic contactor 1 includes a case including an arc extinguishing chamber, an arc extinguishing cover attached to the case and covering the arc extinguishing chamber, and terminal covers arranged on the arc extinguishing cover and attached to the case. The case is formed with a first engagement portion, and the terminal covers are formed with a second engagement portion that is engaged with the first engagement portion to hold the terminal covers on the case. Then, the terminal covers are held on the case in either a first state where there is a gap between the first and second engagement portions or a second state where the terminal covers move in directions away from the arc extinguishing cover and the first and second engagement portions are engaged.

Abstract: A panelboard device according to an embodiment includes a housing and multiple devices stored in the housing. At least one of the multiple devices includes a device main unit; a state detecting unit configured to detect a state of the device main unit; a light emitting unit; and a light emission control unit configured to acquire information indicating the state of the device main unit from the state detecting unit, and to cause the light emitting unit to transmit an optical signal including information indicating the state.

Abstract: An electromagnetic contactor including: an arc-extinguishing chamber in which a contact portion is disposed; a case having an arc-extinguishing chamber housing portion in which the arc-extinguishing chamber is housed; and an arc-extinguishing cover mounted on the case and configured to cover the arc-extinguishing chamber housing portion, wherein at least one of the case and the arc-extinguishing cover has a first engaging portion and a second engaging portion, the other has a third engaging portion configured to engage with the first engaging portion and the second engaging portion, and the arc-extinguishing cover is held to the case in either a first state in which the first engaging portion and the third engaging portion are engaged with each other or a second state in which the second engaging portion is engaged with the third engaging portion.

Abstract: The main body frame includes a first frame including a flexible protruding plate portion, a second frame facing the first frame in a first direction to form the housing section, and a snap-fit mechanism connecting the first frame to the second frame. The snap-fit mechanism includes a fitted portion provided on the flexible protruding plate portion and a fitting projection portion provided on a side wall of the second frame and fitting with the fitted portion. The fitting projection portion and the fitted portion are fitted by bringing the first and second frames into relative proximity in the first direction, and the fitting is released by relatively displacing the first and second frames in a second direction orthogonal to the first direction.

Abstract: An auxiliary contact unit including: a pair of fixed contact pieces; a movable contact piece arranged in a contactable and separable manner to and from the pair of fixed contact pieces; an auxiliary contact support configured to hold the movable contact piece and move in conjunction with opening/closing operation of an electromagnetic contactor; and a unit case configured to house the pair of fixed contact pieces, the movable contact piece, and the auxiliary contact support in a housing portion formed with joining portions of respective ones of a first case member and a second case member opposed to each other, wherein the joining portions of the respective ones of the first and second case members are air-tightly joined to each other.