CN207441590U - A kind of residual current action breaker - Google Patents

Abstract

The utility model relates to a residual current action circuit breaker, which comprises a casing, the bottom of the casing is provided with a base, and a partition is arranged inside the casing. The first cavity of the circuit breaker module, and the second cavity of the leakage protection module for laying out the N-pole circuit breaker module; the L-pole circuit breaker module includes an operating handle, an operating mechanism, including L-pole moving contacts and L-pole static contacts The L-pole contact device of the head, the short-circuit electromagnetic tripping device, the arc extinguishing device and the overload tripping device. The circuit breaker is used in the line with AC 50Hz, rated voltage 230V, and rated current up to 80A. It plays the role of leakage, overload and short circuit protection, and can realize the full use of the internal space of the circuit breaker product.

Description

A residual current operated circuit breaker

technical field

The utility model relates to the field of electrical appliances, in particular to a residual current operated circuit breaker.

Background technique

A circuit breaker refers to a switching device that can close, carry and break current under normal circuit conditions, and can close, carry and break current under abnormal circuit conditions (including short-circuit conditions) within a specified time. Circuit breakers can be used to distribute electric energy, start asynchronous motors infrequently, protect power lines and motors, and automatically cut off the circuit when they are severely overloaded, short-circuited, or under-voltage. Its function is equivalent to a fuse-type switch. Combination with overheating and underheating relays, etc. Moreover, there is generally no need to change parts after breaking the fault current. At present, it has been widely used. When the current circuit breaker is not allowed to cut off the power or perform fault maintenance, the leakage protection tripping function of the protector makes maintenance inconvenient.

Utility model content

The purpose of the utility model is to provide a residual current operated circuit breaker in order to solve the defects existing in the prior art.

In order to achieve the above object, the technical solution adopted by the utility model is:

A residual current operated circuit breaker, comprising a casing, the bottom of the casing is provided with a base, the casing is provided with a partition, the partition separates the casing to form two layers of cavities, and the two layers of cavities are used for laying out the L-pole circuit breaker module The first cavity, and the second cavity for laying out the leakage protection module of the N-pole breaking module;

The L-pole circuit breaker module includes an operating handle, an operating mechanism, an L-pole contact device including an L-pole moving contact and an L-pole static contact, a short-circuit electromagnetic tripping device, an arc extinguishing device, and an overload tripping device; the L-pole The bottom of the inner cavity of the base of the circuit breaker module shell is provided with a plurality of parallel bosses, which have the function of cutting the short-circuit arc and guiding the arc movement track.

The operating handle, short-circuit electromagnetic tripping device and arc extinguishing device are respectively arranged at the upper, middle and lower parts of one side of the first cavity, and the operating handle can drive the operating mechanism to swing in the space on the other side of the first cavity through the connecting rod , to drive the L-pole moving contact arranged on the operating mechanism to contact and separate from the L-pole static contact fixedly installed in the first cavity; the overload release device is arranged at the lower part of the first cavity on the same side as the operating mechanism, And the overload tripping device and arc extinguishing device are respectively located on both sides of the operating mechanism;

The L-pole moving contact is electrically connected to the bimetal of the overload release device through a wire. The bimetal of the overload release device includes a first conductive metal sheet and a second conductive metal sheet connected to each other. The first conductive metal sheet is located at the operating One side of the trip bar of the mechanism, the second conductive metal sheet includes an end fixedly connected to the first conductive metal sheet and an end tail fixed on the base, and the end and end tail of the second conductive metal sheet are connected through a quick connection Mechanism connection, the quick connection mechanism includes a fixed buckle arranged on the end, the quick connection end of the end is fixed to the ferrule, the ferrule is provided with a bayonet, and the end of the second conductive metal sheet extends into the ferrule from the bayonet It is in close contact with the end of the end and tail, and the end is provided with a positioning port. After the end and the end are connected, the fixing buckle is fastened on the positioning port.

In the above-mentioned residual current operated circuit breaker, the end of the second conductive metal sheet is curved.

In the above-mentioned residual current operated circuit breaker, an L-pole wiring device is provided on both sides of the housing, and the first conductive metal sheet of the overload release device is electrically connected to the L-pole wiring device through a wire.

In the above-mentioned residual current operated circuit breaker, a moving rod is provided at the end of the short-circuit electromagnetic tripping device.

The beneficial effects of the utility model are: the circuit breaker is used in a line with AC 50Hz/60Hz, rated voltage 230V, and rated current up to 80A to protect against leakage, overload and short circuit, and can realize full utilization of the internal space of the circuit breaker product.

Description of drawings

Fig. 1 is the schematic diagram of the utility model;

Fig. 2 is the internal schematic diagram of the utility model;

Fig. 3 is a schematic diagram of the second conductive metal sheet of the present invention.

Detailed ways

As shown in Figures 1 to 3, a residual current operated circuit breaker includes a housing 1, a base 2 is provided at the bottom of the housing 1, and a partition 3 is provided inside the housing 1, and the partition separates the housing to form two layers of cavities. The two-layer cavity is the first cavity for laying out the L-pole circuit breaker module, and the second cavity for laying out the leakage protection module of the N-pole circuit breaker module;

L pole circuit breaker module includes operating handle 4, operating mechanism 5, L pole contact device including L pole moving contact 6 and L pole static contact 7, short circuit electromagnetic tripping device 8, arc extinguishing device 9 and overload release The device 10; the arc extinguishing device 9 is composed of a plurality of mutually parallel bosses, which have the function of cutting the short-circuit arc and guiding the moving track of the arc;

The operating handle 4, the short-circuit electromagnetic tripping device 8 and the arc extinguishing device 9 are respectively arranged on the upper, middle and lower parts of one side of the first cavity, and the operating handle 4 can drive the operating mechanism on the other side of the first cavity through the connecting rod 11. Swing in the side space, driving the L-pole moving contact 6 arranged on the operating mechanism to contact and separate from the L-pole static contact 7 fixedly installed in the first cavity; the overload release device 10 is arranged in the first cavity The lower part on the same side as the operating mechanism, and the overload release device 10 and the arc extinguishing device 9 are respectively located on both sides of the operating mechanism 5;

The L pole moving contact 6 is electrically connected to the bimetallic strip of the overload tripping device 10 through a wire, and the bimetallic strip of the overload tripping device includes a first conductive metal strip 12 and a second conductive metal strip 13 connected to each other, and the first conductive The metal sheet 12 is located on one side of the trip bar 13 of the operating mechanism. The second conductive metal sheet 13 includes a terminal 131 fixedly connected with the first conductive metal sheet 12 and an end tail 132 fixed on the base 2. The second conductive metal sheet The end 131 of 13 is connected to the end tail 132 through a quick-connect mechanism, the quick-connect mechanism includes a fixed buckle 133 arranged on the end tail 132, the quick-connect end of the end tail 132 is fixed to a ferrule 134, and the ferrule 134 is provided with a bayonet , the end 131 of the second conductive metal sheet 13 extends into the ferrule 134 from the bayonet and is in close contact with the end of the end tail 132. The end 131 is provided with a positioning port. After the end 131 is connected to the end tail 132, The fixed buckle 133 is fastened on the positioning opening, the end 131 of the second conductive metal sheet 13 is curved, the end 131 of the second conductive metal sheet 13 can be replaced arbitrarily, and is properly adjusted according to the required bending shape of the end 131, The adjustment is convenient, and the accuracy of the contact between the terminal head 131 and the trip bar 13 is improved.

Further, both sides of the housing 1 are provided with L-pole wiring devices 14, the first conductive metal sheet 12 of the overload tripping device 10 is electrically connected with the L-pole wiring device 14 through a wire, and the end of the short-circuit electromagnetic tripping device 8 is provided with a movable Rod 81.

This circuit breaker is used in the line with AC 50Hz, rated voltage 230V, and rated current up to 80A. It plays the role of leakage, overload and short circuit protection. It can realize the full use of the internal space of the circuit breaker. The residual leakage function of the leakage circuit breaker can be selected. On” and “Off”, the leakage protection can enter the locked state when power failure is not allowed or when troubleshooting. At this time, the protector loses the function of leakage protection tripping; it can also be used for infrequent switching of lines.

The basic principles, main features and advantages of the present utility model have been shown and described above. Those skilled in the industry should understand that the utility model is not limited by the above-mentioned embodiments. The above-mentioned embodiments and descriptions describe only the principle of the utility model. There will be various changes and improvements, and these changes and improvements all fall within the scope of the claimed utility model. The protection scope required by the utility model is defined by the appended claims and their equivalents.

Claims (4)

1. A residual current operated circuit breaker, including a casing, the bottom of the casing is provided with a base, and a partition is provided inside the casing, and the partition separates the casing to form two layers of cavities, and the two layers of cavities are used for laying L-pole circuit breakers. The first cavity of the module, and the second cavity of the leakage protection module for laying out the N-pole breaking module; It is characterized in that the L-pole circuit breaker module includes an operating handle, an operating mechanism, an L-pole contact device including an L-pole moving contact and an L-pole static contact, a short-circuit electromagnetic tripping device, an arc extinguishing device, and an overload tripping device. device; the operating handle, the short-circuit electromagnetic tripping device and the arc extinguishing device are respectively arranged on the upper, middle and lower parts of one side of the first cavity, and the operating handle can drive the operating mechanism through the connecting rod in the space on the other side of the first cavity Inward swing, driving the L-pole moving contact arranged on the operating mechanism to contact and separate from the L-pole static contact fixedly installed in the first cavity; the overload release device is arranged on the same side of the first cavity and the operating mechanism The lower part, and the overload tripping device and arc extinguishing device are respectively located on both sides of the operating mechanism; The L-pole moving contact is electrically connected to the bimetal of the overload release device through a wire. The bimetal of the overload release device includes a first conductive metal sheet and a second conductive metal sheet connected to each other. The first conductive metal sheet is located at the operating One side of the trip bar of the mechanism, the second conductive metal sheet includes an end fixedly connected to the first conductive metal sheet and an end tail fixed on the base, and the end and end tail of the second conductive metal sheet are connected through a quick connection Mechanism connection, the quick connection mechanism includes a fixed buckle arranged on the end, the quick connection end of the end is fixed to the ferrule, the ferrule is provided with a bayonet, and the end of the second conductive metal sheet extends into the ferrule from the bayonet It is in close contact with the end of the end and tail, and the end is provided with a positioning port. After the end and the end are connected, the fixing buckle is fastened on the positioning port. 2 . The residual current operated circuit breaker according to claim 1 , wherein the end of the second conductive metal sheet is curved. 3 . 3. A residual current operated circuit breaker according to claim 1, characterized in that an L-pole wiring device is provided on both sides of the housing, and the first conductive metal sheet of the overload release device is connected to the L-pole through a wire The device is electrically connected. 4. A residual current operated circuit breaker according to claim 1, characterized in that a moving rod is provided at the end of the short-circuit electromagnetic tripping device.