CN2262295Y

CN2262295Y - Small circuit breaker

Info

Publication number: CN2262295Y
Application number: CN 96206526
Authority: CN
Inventors: 丁元海; 吴东明
Original assignee: XIN'AN ELECTRIC APPLIANCE SWITCH FACTORY CHANGZHOU CITY
Current assignee: XIN'AN ELECTRIC APPLIANCE SWITCH FACTORY CHANGZHOU CITY
Priority date: 1996-03-18
Filing date: 1996-03-18
Publication date: 1997-09-10
Anticipated expiration: 2006-03-18

Abstract

The utility model relates to a small circuit breaker which belongs to a low-voltage distribution apparatus. The utility model is mainly composed of a housing, an operating mechanism, a contact head, an electromagnetic tripper, an arc-extinguishing chamber, a thermal tripper, a leading-in terminal and a leading-out terminal. The leading-out terminal comprises a wire-connecting ring, a press coil which is sheathed on the wire-connecting ring, and a screw which is screwed on the press coil. The leading-in terminal of the utility model is not provided with an exerted part, so the safe use is realized. The leading-out terminal of the utility model can be pressed and connected with a conducting wire and can also be pressed and connected with an electric-conducting copper row, so the pressing connection is reliable and convenient. Both sides of the housing are provided with holes, so electrical accessories can be easily assembled and connected with each other.

Description

Miniature circuit breaker

The utility model belongs to a kind of electrical installation, particularly relates to a kind of low-voltage distribution electrical installation.

Be widely used in distribution at present; control; the circuit breaker of protection aspect; its outlet terminals adopt the crimping mode more; for example Merlin Gerin on December 16th, 1986 application number be 86108536 the patent miniature circuit breaker of insulation level " improve "; it comprises shell; operating grip; magnetictrip; arc control device; thermal overload release; contact and terminals; its terminals are exactly the screw compression joint type; this mode of connection is easy; but its terminals expose shell; dangerous during use; crimping is also unreliable in addition; particularly more unreliable to the crimping of sub-thread thin wire, and have the go between shortcoming of building block inconvenience of leading-out terminal.

The purpose of this utility model is to provide a kind of outlet terminals safe and reliable, the miniature circuit breaker of easy-to-connect.

The utility model is a kind of improvement to existing miniature circuit breaker, it comprises insulation crust, be arranged in the operating mechanism of insulation crust, contact, magnetictrip, arc control device, thermal overload release, inlet wire terminals and outlet terminals, the outlet terminals are by the horizontal Qian shape wiring ring that is clamped on the insulation crust inboard, are enclosed within the line ball circle on the horizontal Qian shape wiring ring and pass the screw that the hole on the horizontal Qian shape wiring ring is screwed in the line ball circle to constitute.

One side of insulation crust has hole (15) near the thermal overload release place; The opposite side of insulation crust has hole (8) near the thermal overload release place.

Outlet terminals screw be screwed into direction above an isolation baffle plate with holes is arranged, isolation baffle plate and insulation crust are connected in one.

The utility model had both had the simplicity of general terminals, did not have fail safe because of the outlet terminals have exposed parts again; When many circuit breakers are installed side by side, can adopt busbar to connect, wiring is reliable; Because of adopting arc in line ball circle bottom, upper and lower equal energy line ball has increased contact-making surface during the crimping lead, and is safe and reliable; Owing to have the hole near the thermal overload release place on the insulation crust, make circuit breaker when electric accessories such as assembly unit leakage tripping device, the major loop lead can directly be introduced electric accessories from the hole, so connects very conveniently, and can obviously reduce the volume of electric accessories.

Fig. 1 is miniature circuit breaker Unclosing structure figure.

Fig. 2 is that outlet terminals A-A is to cutaway view.

Fig. 3 is the miniature circuit breaker lateral side view.

Among Fig. 1, Fig. 2, Fig. 3: the horizontal Qian shape of 1-inlet wire terminals 2-arc chamber 3-magnetictrip 4-insulation crust 5-thermal overload release 6-operating mechanism 7-isolation baffle plate 8-hole 9-hole 10-screw 11-wiring ring 12-outlet terminals 13-line ball circle 14-assembling clamping plate 15-hole

Embodiment:

In conjunction with describing with Fig. 1, Fig. 2, Fig. 3.

The utility model is made of insulation crust (4), operating mechanism (6), magnetictrip (3), thermal overload release (5), the inlet wire terminals (1) that comprise contact, arc control device (2), isolation baffle plate (7), outlet terminals (12), screw (10), horizontal Qian shape wiring ring (11), line ball circle (13), hole (8), hole (9), hole (15) and assembling clamping plate (14), insulation crust (4) and isolation baffle plate (7) single injection-molded, all the other each several parts all are inlaid in the insulation crust (4).

The perforate that screw (10) passes horizontal Qian shape wiring ring (11) top is screwed in the line ball circle (13), horizontal Qian shape wiring ring (11) is clamped in the insulation crust (4) and maintains static, line ball circle (13) with screw (10) be screwed into and on move, because of line ball circle (13) is enclosed within on the horizontal Qian shape wiring ring (11), when screw (10) just can clamp the bottom that is inserted in horizontal Qian shape wiring ring (11) and the lead-out wire between line ball circle (13) the arc lower limit when being screwed into; In addition, can also compress sub-thread thin wire or conducting copper between screw (10) and horizontal Qian shape wiring ring (11) top, screw (10) is adjusted by the hole (9) that it is screwed on the direction top isolation baffle plate (7).

Miniature circuit breaker can be as required, by the assembling clamping plate (14) on it carry out assembly unit or with other electric accessories assembling.

Thermal overload release (5) adopts the bimetal leaf release.

Insulation crust (4) one sides have hole (15) and can easily the major loop lead be directly connected on the electric accessories of assembly unit; When insulation crust (4) opposite side has hole (8), when being convenient to many circuit breakers and installing side by side directly from the hole (8), lead-in wire in hole (15).Hole (15), hole (8) are positioned at the place that insulation crust (4) is gone up close thermal overload release.

Comprise contact inlet wire terminals (1), magnetictrip (3), thermal overload release (5), between outlet terminals (12), be electrically connected successively.

Claims

1, miniature circuit breaker, comprise insulation crust, operating mechanism, contact, magnetictrip, arc control device, thermal overload release, inlet wire terminals, outlet terminals, it is characterized in that the outlet terminals by inside the shell horizontal Qian shape wiring ring of chucking, be enclosed within the line ball circle on the horizontal Qian shape wiring ring and pass the screw that the hole on the horizontal Qian shape wiring ring is screwed in the line ball circle and constitute.

2, miniature circuit breaker according to claim 1 is characterized in that having hole (15) in a side of insulation crust near the thermal overload release place.

3, miniature circuit breaker according to claim 2 is characterized in that having hole (8) at the opposite side of insulation crust near the thermal overload release place.

4, miniature circuit breaker according to claim 1, it is characterized in that outlet terminals screw be screwed into direction above an isolation baffle plate with holes is arranged, isolation baffle plate and insulation crust connect together.