Classifications

• • H—ELECTRICITY
  • H01—ELECTRIC ELEMENTS
  • H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
  • H01H71/00—Details of the protective switches or relays covered by groups H01H73/00 - H01H83/00
  • H01H71/10—Operating or release mechanisms
  • H01H71/12—Automatic release mechanisms with or without manual release
  • H01H71/126—Automatic release mechanisms with or without manual release actuated by dismounting of circuit breaker or removal of part of circuit breaker
• • H—ELECTRICITY
  • H01—ELECTRIC ELEMENTS
  • H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
  • H01H1/00—Contacts
  • H01H1/58—Electric connections to or between contacts; Terminals
  • H01H1/5866—Electric connections to or between contacts; Terminals characterised by the use of a plug and socket connector
• • H—ELECTRICITY
  • H01—ELECTRIC ELEMENTS
  • H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
  • H01H73/00—Protective overload circuit-breaking switches in which excess current opens the contacts by automatic release of mechanical energy stored by previous operation of a hand reset mechanism
  • H01H73/02—Details
  • H01H73/06—Housings; Casings; Bases; Mountings
  • H01H73/08—Plug-in housings
• • H—ELECTRICITY
  • H01—ELECTRIC ELEMENTS
  • H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
  • H01H71/00—Details of the protective switches or relays covered by groups H01H73/00 - H01H83/00
  • H01H71/08—Terminals; Connections

Definitions

• the present invention relates to a plug-in type circuit breaker in which a circuit breaker main body is made detachable from a mounting base. It relates to a type circuit breaker. Background art
• FIG. 8 is a longitudinal sectional view of a main part of a conventional plug-in type circuit breaker disclosed in WO 00/27959, for example, with a breaker body inserted into a mounting base.
• Fig. 9 is an enlarged cross-sectional view of the safety trip device constituting the plug-in type circuit breaker of Fig. 8 when it is disengaged from the tripping mechanism.
• (A) is an enlarged side cross-section.
• FIG. 1B is a cross-sectional view of a main part of FIG. 1A, and
• FIG. 2C is an enlarged internal perspective view showing a fitting state of a trip rod and a case.
• the circuit breaker body 1 has a tulip-shaped connector 3 as a connecting contact member held by a pressurizing spring 2 at a predetermined contact pressure in a case of a molded insulator.
• a switching contact (not shown) that is electrically connected between the 6 and opens and closes the circuit through which the load current flows, an opening and closing mechanism (not shown) that opens and closes this opening and closing contact, and when an overcurrent flows in the circuit
• a trip mechanism (not shown) for operating the opening / closing mechanism opening / closing mechanism, and a handle 1a capable of manually operating the opening / closing mechanism.
• the mounting base 7 into which the breaker body 1 is inserted has an insertion base 8 made of molded insulating material, external conductors 9 connected to both the power supply side and the load side of the insertion base 8, and a connector 3
• Reference numeral 11 denotes a stud cover for fixing and insulating the insertion stud 10.
• Reference numeral 12 denotes a trip shaft forming a part of the tripping mechanism, which is urged clockwise by a spring (not shown), and is turned counterclockwise when an overcurrent flows in the circuit.
• the opening and closing mechanism (not shown) is turned by a predetermined amount (in the direction of arrow F12).
• trip rod 13 is a trip rod which is a tripping member.
• One end 13a is loosely engaged with the trip shaft 12 and the other end 13b is disposed on the insertion base 8. It is in contact with the projection 8a.
• Reference numeral 14 denotes a compression spring that urges the trip bar 13 toward the insertion base 8
• reference numeral 15 denotes an outer periphery of the trip bar 13 and the compression spring 14.
• the trip rod 13, compression spring 14, and case 15 constitute a safety trip unit.
• the open / close check can be performed when the open / close contact of the breaker body 1 is closed, that is, the trip bar 13 is fixed. If the breaker body 1 is inserted into the mounting base 7 in this state, the safety trip device does not trip and an arc is generated when the connector 3 comes into contact with the insertion stud 10.
• the safety trip device when the breaker body 1 inserted with the trip bar 13 fixed is removed, the safety trip device does not trip and the connector 3 is inserted. There is a problem that an arc is generated when separating from the arm 10.
• the present invention has been made to solve such a problem, and it is possible to easily perform an open / close check even when the circuit breaker main body is detached from the mounting base, and to perform a state where the open / close check can be performed.
• the safety trip device When the breaker body is inserted into the mounting base with the trip rod fixed, or when the breaker body is removed from the mounting base, the safety trip device operates as intended. The purpose is to obtain a plug-in type circuit breaker that can be used. Disclosure of the invention
• the plug-in type circuit breaker comprises: a switching contact for opening and closing a circuit through which a load current flows; a tripping mechanism for opening the switching contact; and a connection contact member for guiding a load current to the circuit.
• a pluggable circuit breaker comprising: a circuit breaker main body having a terminal member for connecting an external conductor and inserting and connecting the connection contact member; and a mounting base for mounting the circuit breaker main body.
• a trip rod for operating a release mechanism, and a lever acting on the trip rod when the circuit breaker body is inserted into the mounting base or when the circuit breaker body is removed from the mounting base.
• the hook mechanism is released before the connection contact member comes into contact with the terminal member, and the urging force of the elastic member is reduced.
• the trip mechanism is operated to open the switching contact, and the circuit breaker body in the closed state of the switching contact is removed from the mounting base.
• the lever acts on the trip rod based on the urging force of the elastic member to operate the tripping mechanism. Trip to open the switching contact It is equipped with a device.
• the locking mechanism comprises: a projection engaging portion provided on the circuit breaker main body; and an arm engaging with the mounting base when the circuit breaker main body is inserted into the mounting base.
• a projection engaging portion provided on the circuit breaker main body
• an arm engaging with the mounting base when the circuit breaker main body is inserted into the mounting base.
• the lever has a round portion acting on the trip rod at one end and a projection engaging the mounting base at the other end, and a pin fitted at a substantially central portion is used as a fulcrum.
• the elastic member is used as a fulcrum.
• center distance between the pin and the cylindrical portion is substantially the same as or larger than the center distance between the pin and the projection.
• the connector that is the connection contact member is separated from the insertion stand that is the terminal material. Before that, the switching current can be opened to cut off the load current.
• the contact surface of the projection with the projection engaging portion has a tapered shape.
• FIG. 1 is a longitudinal sectional view of a main part of a plug-in type circuit breaker according to Embodiment 1 of the present invention in a state where a circuit breaker main body is removed from a mounting base.
• FIG. 2 is a cross-sectional view of a main part of the upper surface of the circuit breaker main body of FIG.
• FIG. 3 is an enlarged perspective view of a safety trip device of the plug-in type circuit breaker according to Embodiment 1 of the present invention.
• FIG. 4 is a longitudinal sectional view of an essential part showing a state in which the breaker body of the plug-in type circuit breaker according to Embodiment 1 of the present invention is being inserted into the mounting base.
• FIG. 5 is a longitudinal sectional view of a main part of the plug-in type circuit breaker according to Embodiment 1 of the present invention in a state where the circuit breaker main body is inserted into a mounting base.
• FIG. 6 is a cross-sectional view of a main part of the upper surface of FIG.
• FIG. 7 is a cross-sectional view of the lower surface of FIG.
• FIG. 8 is a longitudinal sectional view of a main part of a conventional plug-in type circuit breaker in a state where a breaker body is inserted into a mounting base.
• Fig. 9 is an enlarged cross-sectional view of the safety trip device of Fig. 8 when the engagement with the tripping mechanism is released, (a) is an enlarged side cross-sectional view, and (b) is (a). 3 is a cross-sectional view of a main part of the upper surface, and (c) is an enlarged internal perspective view showing a fitting state of a trip rod and a case. Description of reference numerals in the drawings
• 1 is the breaker body, 1 a is the handle, 2 is the pressure spring,
• 3 is a connector (connecting member for connection), 4 is a plug terminal, 5 is a power supply terminal, 6 is a load terminal, 7 is a mounting base, 8 is a insertion pace, 8a is an arm engagement portion, and 8b is a Lever engagement part, 9 is the outer conductor, 10 is the insertion stud (terminal member), 11 is a stud cover, 12 is a trip shaft (tripping mechanism), 15 is an intermediate actuator, 15a is a shaft, 20 is a safety trip unit, and 21 is a trip unit.
• Rod 2 1a is a fitting hole, 2 1b is a tip, 2 2 is a lever, 2 2a is a through hole, 2 2b is a cylindrical part, 2 2c is an arm, 2 2d is a protrusion, 2 2 e is a projecting part, 23 is a twist spring, 24 is a tightening screw,
• 25 is a bracket, 25a is a through hole, 25b is a through hole, 25c is an engagement hole, 25d is a projection engagement portion, 26 is a pin, and 30 is a lock mechanism.
• FIG. 1 is a longitudinal sectional view of a main part of a plug-in type circuit breaker according to Embodiment 1 of the present invention in a state in which a main body of the breaker is removed from a mounting base.
• FIG. FIG. 3 is an enlarged perspective view of a safety trip device for a plug-in type circuit breaker according to Embodiment 1 of the present invention, as viewed from the load side.
• a circuit breaker body 1 is held in a case of a molded insulator by a predetermined contact pressure by the action of a pressure spring 2 and is a tulip-shaped connector which is a contact member for connection.
• a trip mechanism (not shown) for operating the opening / closing mechanism opening / closing section, and a handle 1a that can manually operate the opening / closing mechanism section.
• the mounting base 7 into which the breaker body 1 is inserted The external conductor 9 is connected to both the base 8 and the power supply side and the load side of the insertion base 8, and an insertion stud 10 which is a terminal member to be inserted and connected to the connector 3 is provided. .
• 11 is a stud force par for fixing and insulating the plug stud 10.
• 1 and 2 are trip shafts which form a part of the tripping mechanism and are urged counterclockwise by a spring (not shown). Turn the opening / closing mechanism (not shown) by rotating it clockwise by a predetermined amount (direction of arrow F1).
• Reference numeral 15 denotes an intermediate actuator that rotates in the direction of arrow F2 with the shaft 15a as a fulcrum in conjunction with a trip rod 21 described later to operate the trip shaft 12.
• reference numeral 20 denotes a safety trip device, which is used to insert the trip rod 21 for rotating the intermediate actuator 15 and the breaker body 1 into the mounting base 7 or to insert the breaker body. 1 is removed from the mounting base 7 by the lever 22 acting on the trip rod 21, the torsion spring 23 which is an elastic member for urging the lever 22, and the tightening screw 24.
• a cylindrical portion 2 2b that is inserted into the fitting hole 21 a of the trip rod 21 is protruded at one end.
• the arms 22 c that engage with the mounting base 7 when the circuit breaker body 1 is inserted into the mounting base 7 and the projections of the engagement holes 25 c provided in the bracket 25.
• a projection 22d engaging with the joint 25d is physically disposed.
• the torsion spring 23 has one end 23 a locked to the spring locking portion 25 e of the bracket 25, and the other end 23 b bent to the leper 22.
• the lever 22 is urged in the direction of arrow F3.
• the arm 22c engages with the mounting base 7.
• the lever 22 rotates in the direction of arrow F 3
• the lever 22 moves in the direction of arrow F 4 to move the trip bar 2 1.
• the 2 lb tip acts on the middle actuator 15a.
• the plug-in type circuit breaker provided with the safety trip device 20 configured as described above operates in a state where the breaker body 1 is removed from the mounting base 7 and the safety trip device 2 is mounted.
• the trip rod 21 In the locked state in which the projection 2 2 d of the lever 2 2 of 0 is engaged with the projection engaging portion 25 d of the bracket 25, the trip rod 21 does not act on the intermediate actuator 15.
• the opening / closing contact can be checked by operating the opening / closing mechanism with the handle 1a.
• FIG. 4 is a longitudinal sectional view of a main part of the plug-in type circuit breaker according to Embodiment 1 of the present invention in a state where the circuit breaker main body is being inserted into the mount.
• FIG. 5 is a longitudinal sectional view of a main part of the plug-in type circuit breaker according to Embodiment 1 of the present invention in a state where the main body of the breaker is inserted into a mounting base.
• FIG. 6 is a circuit breaker of FIG.
• FIG. 7 is a cross-sectional view of a main part of the upper surface when the main body is viewed from the load side
• FIG. 7 is a cross-sectional view of a main part of the lower surface when the main body of the circuit breaker of FIG. 5 is viewed from the power supply side.
• the lever 22 is moved in the direction of arrow F 9 (shown in FIG. 5) by the biasing force of the twist spring 23, and the lever 22 is attached to the lever engaging portion 8 b formed on the insertion base 7.
• the protruding part 2 2 e of 2 comes into contact.
• the operation of pulling out the breaker body 1 is performed in the reverse of the insertion operation described above, and when the breaker body 1 is pulled out, the breaker body 1 comes into contact with the repeller engaging portion 8b formed in the insertion pace 8.
• the projecting portion 2 2 e of lever 2 2 in contact is twisted Spring Energized to 23, it rotates in the direction of arrow F11 (shown in Fig. 7), and the trip bar 21 moves in the direction of arrow F6 (shown in Fig. 4) to move the tip.
• 2 1 b acts on the intermediate actuator 21, pivots about the shaft 15 a in the direction of the arrow F 7, and pivots the trip shaft 12 in the direction of the arrow F 8.
• c is the center distance between the position of the pin 26 and the cylindrical portion 22b
• d is the center distance between the position of the pin 26 and the protruding portion 22e.
• the relationship is set to dc.
• the dimensions of the projection 22 d that engages with the projection engagement portion 25 d are such that the projection 22 d is detached from the projection engagement portion 25 d when the breaker body 1 is pulled out.
• the dimension of the projection 22 d on the side close to the pin 26 is a
• the dimension on the side far from the pin 26 is b.
• a and b Industrial applicability
• the plug-in type circuit breaker of the present invention is suitable for surely opening the on-off contact when the circuit breaker body is attached to or detached from the mounting base.

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• Physics & Mathematics (AREA)
• Electromagnetism (AREA)
• Breakers (AREA)

Priority Applications (6)

Applications Claiming Priority (1)

Publications (1)

Family

ID=29434528

Family Applications (1)

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Cited By (1)

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Citations (5)

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• 2002
  • 2002-05-22 JP JP2004506054A patent/JP4057010B2/ja not_active Expired - Fee Related
  • 2002-05-22 DE DE60239108T patent/DE60239108D1/de not_active Expired - Lifetime
  • 2002-05-22 WO PCT/JP2002/004943 patent/WO2003098652A1/ja active Application Filing
  • 2002-05-22 CN CNB028091507A patent/CN1302503C/zh not_active Expired - Fee Related
  • 2002-05-22 EP EP02728105A patent/EP1507275B1/en not_active Expired - Lifetime
  • 2002-05-28 TW TW091111259A patent/TWI222094B/zh not_active IP Right Cessation

Patent Citations (5)

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