阅读说明：本技术 数字保护继电器 (Digital protective relay ) 是由 安洪善 于 2019-02-18 设计创作，主要内容包括：本发明提供一种数字保护继电器,其包括：背板模块,包括固定于前盖的第一印刷电路板和结合于所述第一印刷电路板的连接器；以及功能模块,包括结合于所述连接器的第二印刷电路板和设置于所述第二印刷电路板的指状接地,所述指状接地和结合于所述前盖的后盖形成接地通路,当形成所述接地通路时,所述指状接地将因所述前盖和所述后盖结合而产生的弹力传递到所述第二印刷电路板。(The invention provides a digital protective relay, which comprises: a back panel module including a first printed circuit board fixed to the front cover and a connector combined with the first printed circuit board; and a functional module including a second printed circuit board combined with the connector and a finger ground provided to the second printed circuit board, the finger ground and a rear cover combined with the front cover forming a ground path, the finger ground transmitting an elastic force generated by the combination of the front cover and the rear cover to the second printed circuit board when the ground path is formed.)

1. A digital protective relay includes a front cover and a rear cover which are combined with each other, wherein,

The method comprises the following steps:

A back panel module including a first printed circuit board fixed to the front cover and a connector combined with the first printed circuit board; and

A functional module including a second printed circuit board coupled to the connector and a finger ground disposed on the second printed circuit board, the finger ground and the rear cover forming a ground path;

In a state where the front cover and the rear cover are coupled, an elastic force of the finger-like ground against the rear cover becomes a force that pushes the second printed circuit board toward the connector side.

2. the digital protection relay according to claim 1,

The finger-ground is bonded to a ground copper foil patterned on the second printed circuit board by soldering or screws.

3. The digital protection relay according to claim 1,

The finger-like ground is provided on a second side surface opposite to the first side surface of the second printed circuit board to which the connector is coupled.

4. The digital protection relay according to claim 3,

the finger is disposed at a second position of the second side corresponding to a first position of the first side engaged with the connector.

5. The digital protection relay according to claim 3,

the finger ground transmits the spring force from the second side toward the first side.

6. The digital protection relay according to claim 1,

The finger-shaped ground is formed of a metal material that generates the elastic force and forms the ground via.

7. The digital protection relay according to claim 1,

The finger ground includes:

A first finger ground; and

A second finger ground spaced from the first finger ground.

8. The digital protection relay according to claim 7,

The first and second finger grounds are electrically connected by a ground copper foil patterned on the second printed circuit board.

9. The digital protection relay according to claim 7,

Either one of the first and second finger grounds is disposed on a ground copper foil patterned on the second printed circuit board and forms a ground path with the second printed circuit board.

Technical Field

the present invention relates to a digital protective relay for preventing the propagation of accidents in electric power systems.

Background

a Digital Protective Relay (Digital Protective Relay) is a Relay that determines an accident in a power system and activates a circuit breaker to prevent the propagation of the accident. For example, when an abnormal condition such as a short circuit or an eddy current occurs in the circuit, the digital protective relay issues a command to open the portion in the circuit.

In general, a digital protective relay may include a backplane module and a plurality of functional modules coupled to the backplane module. At this time, a plurality of functional modules may be vertically combined to the back panel module.

The back plate module can be combined with a front cover of the digital protection relay, and the front cover can be combined with a rear cover for preventing the plurality of functional modules from being separated.

Each of the plurality of functional modules includes a printed circuit board. However, there may be a coupling tolerance (i.e., an assembly tolerance) between the printed circuit board and the rear cover of at least any one of the functional modules. Due to this coupling tolerance, the functional module can be easily separated from the connector of the backplane module. Therefore, it is necessary to provide a scheme for preventing the detachment of the functional module caused by the coupling tolerance.

Disclosure of Invention

An object of the present invention is to provide a digital protective relay capable of improving an assembly tolerance between each functional module and a back cover and easily forming a ground path.

The digital protective relay of the present invention comprises: a back panel module including a first printed circuit board fixed to the front cover and a connector combined with the first printed circuit board; and a functional module including a second printed circuit board combined with the connector and a finger ground provided to the second printed circuit board, the finger ground and a rear cover combined with the front cover forming a ground path, and the finger ground transmitting an elastic force generated by the combination of the front cover and the rear cover to the second printed circuit board when the ground path is formed.

the finger ground may be bonded to a ground copper foil patterned on the second printed circuit board by soldering or screws.

The finger-like ground may be provided on a second side surface opposite to the first side surface of the second printed circuit board combined with the connector.

the finger ground may be disposed at a second position of the second side corresponding to a first position of the first side to which the connector is coupled.

The finger-like ground may transmit the elastic force from the second side surface toward the first side surface.

The finger-shaped ground is formed of a metal material that generates the elastic force and forms the ground via.

The finger grounds may include a first finger ground and a second finger ground spaced apart from the first finger ground.

The first and second finger grounds may be electrically connected by a ground copper foil patterned on the second printed circuit board.

Any one of the first and second finger grounds may be provided to a ground copper foil patterned on the second printed circuit board and form a ground path with the second printed circuit board.

The digital protective relay according to an embodiment of the present invention includes a backplane module and a functional module, wherein the functional module includes a second printed circuit board combined with a connector of the backplane module and a finger-like ground disposed on the second printed circuit board. Here, the finger-shaped ground and the rear cover form a ground path. Due to such finger-like grounding, even if detachment of the functional module and assembly tolerance between the rear cover and the functional module to be protected occur, a ground path is easily formed.

in addition, when a ground path is formed between the functional module and the rear cover due to the finger-shaped ground, an elastic force generated by the coupling of the front cover and the rear cover is transmitted to the second printed circuit board of the functional module. That is, the elastic force generated by the contact with the back cover is provided to the functional module to push the functional module toward the back plate module, thereby increasing the coupling force between the functional module and the back plate module.

Drawings

FIG. 1 is a perspective view schematically showing a digital protective relay of the present invention

Fig. 2 is a perspective view schematically showing a digital protective relay of the present invention.

Fig. 3 is a perspective view schematically showing an internal structure of the digital protective relay of the present invention.

Fig. 4A and 4B are diagrams illustrating an embodiment of forming a ground path between the functional module and the rear cover of the present invention.

Fig. 5A and 5B are diagrams showing an embodiment of the present invention provided to the finger-ground of the functional module.

Description of the reference numerals

1: front cover 2: rear cover

110 backboard module 130 function module

Detailed Description

The foregoing objects, features and advantages will be described in detail with reference to the accompanying drawings, whereby those skilled in the art can easily embody the technical idea of the present invention. In describing the present invention, when it is determined that a detailed description of a known technology related to the present invention may obscure the gist of the present invention, a detailed description thereof will be omitted. Hereinafter, preferred embodiments of the present invention will be described in detail with reference to the accompanying drawings. In the drawings, the same reference numerals denote the same or similar structural elements.

Fig. 1 and 2 are perspective views schematically showing a digital protective relay of the present invention.

Fig. 1 is a perspective view illustrating a front side upper end of a digital protective relay 100, and fig. 2 is a perspective view illustrating a rear side upper end of the digital protective relay 100.

Referring to fig. 1 and 2, the digital protective relay 100 may include a front cover 1 and a rear cover 2.

At this time, the front cover 1 may include a data display part 3 and a plurality of function keys 4 operated by a user at a lower portion of the data display part 3.

The back cover 2 may be coupled to the front cover 1 to protect the back panel module 110 coupled to the front cover 1 and the plurality of functional modules 130 coupled to the back panel module 110.

Here, the back cover 2 covers the periphery of the back plate module 110 and the plurality of functional modules 130, and may be coupled to the front cover 1, but is not limited thereto.

Fig. 3 is a perspective view schematically showing an internal structure of the digital protective relay of the present invention.

Referring to fig. 3, the digital protective relay 100 may include a backplane module 110 and a plurality of functional modules 130.

here, the backplane module 110 is used to electrically connect the plurality of functional modules 130. The plurality of functional modules 130 are typically combined with the backplane module 110 and may not be configured interchangeably.

First, the backplane module 110 may include a first printed circuit board 112 and a plurality of connectors 114, and a plurality of functional modules 130 are respectively coupled to the plurality of connectors 114. Here, the first printed circuit board 112 may implement an electronic circuit to electrically connect each of the plurality of functional modules 130 to each other. That is, the first printed circuit board 112 may be a circuit board used as a mother board (motherboard).

each of the plurality of connectors 114 is electrically connected to the plurality of functional modules 130 and fixes the plurality of functional modules 130.

The plurality of functional modules 130 may be a main functional module, an operation module, a communication module, an input-output module, a measurement module, etc., but is not limited thereto. Here, the main function module may include a central processing device for controlling the operation function of the digital protective relay 100. The central processing unit may control operations of the operation module, the communication module, the input/output module, the measurement module, and the like through the backplane module 110.

The plurality of functional modules 130 may include a second printed circuit board 132 and a finger ground 134, respectively.

Here, the second printed circuit board 132 may be a circuit board formed with electronic circuits for performing respective functions. Such a second printed circuit board 132 may be coupled and fixed to one of the plurality of connectors 114, the plurality of connectors 114 being coupled to the backplane module 110.

The finger ground 134 may contact the back cover 2 described in fig. 1 and 2 to form a ground path with the electronic circuit formed in the second printed circuit board 132.

In addition, the finger-shaped ground 134 may be made of a conductive metal material having elasticity. Thus, when the rear cover 2 is coupled to the front cover 1 by the elastic force of the finger-shaped ground 134 disposed between the rear cover 2 and the second printed circuit board 132, assembly tolerance generated between the second printed circuit board 132 and the rear cover 2 can be eliminated.

In addition, the elastic force of the finger-shaped ground 134 against the back cover 2 may serve as a force to push the second printed circuit board 132 toward the connector 114 side of the backplane module. That is, when the finger ground 134 forms a ground path with the rear cover 2, the elastic force of the finger ground 134 against the rear cover 2 is provided to the second printed circuit board 132. Here, since the elastic force of the finger-like ground 134 against the rear cover 2 becomes a force pushing the second printed circuit board 132 toward the connector 114, the second printed circuit board 132 can be prevented from being detached from the connector 114.

The finger ground 134 may be bonded by soldering or screwing to a ground copper foil patterned on the second printed circuit board 132. At this time, the elastic force generated at the finger ground 134 may be provided to the second printed circuit board 132 bonded by the soldering or the screw.

In addition, the finger-shaped ground 134 may be disposed on a second side surface opposite to the first side surface of the second printed circuit board 132 combined with the connector 114, but is not limited thereto. That is, the finger ground 134 may be coupled to at least one of the front surface and the rear surface of the second printed circuit board 132 adjacent to the second side surface, which is not the second side surface.

In order for the elastic force of the finger-shaped ground 134 against the rear cover 2 to provide a force to push the second printed circuit board 132 toward the connector 114, the finger-shaped ground 134 may be coupled at a second position opposite to the first position of the second printed circuit board 132 coupled to the connector 114. That is, the finger-shaped ground 134 is coupled to the second position of the second printed circuit board 132 opposite to the first position, so that the elastic force of the finger-shaped ground 134 can act on the first position, which is opposite to the second position corresponding to the finger-shaped ground 134.

the finger ground 134 may be coupled in such a manner as to protrude in an outer direction of the second printed circuit board 132. For example, the finger-shaped ground 134 may have a shape that generates an elastic force when contacting the rear cover 2.

In the embodiment, the finger-shaped ground 134 is described as having a curved shape of a curved surface, but may be a shape having at least two or more curved surfaces, but is not limited thereto.

Fig. 4A and 4B are diagrams illustrating an embodiment of forming a ground path between the functional module and the rear cover of the present invention.

Referring to fig. 4A and 4B, the backplane module 110 may include a first printed circuit board 112 and a connector 114, and the functional module 130 may include a second printed circuit board 132 and a finger ground 134.

Fig. 4A shows a state in which the rear cover 2 is moved in the direction of the first printed circuit board 112 to be coupled to the front cover 1 in a state in which the second printed circuit board 132 is coupled to the connector 114.

At this time, the finger ground 134 may protrude a first distance d1 with reference to a side of the second printed circuit board 132.

at this time, the protruded first distance d1 of the finger ground 134 serves to secure the elastic force of the finger ground 134 when the rear cover 2 is coupled to the front cover 1. That is, the finger-shaped ground 134 protruding by the first distance d1 compared to the second printed circuit board 132 provides an elastic force to the second printed circuit board 132, so that a ground path can be formed between the second printed circuit board 132 and the rear cover 2 even if an assembly tolerance between the second printed circuit board 132 and the rear cover 2 occurs.

Fig. 4B shows a state in which the rear cover 2 is coupled to the front cover 1 in fig. 4A.

At this time, the finger-shaped ground 134 of fig. 4B is changed from the first shape to the second shape, and a ground path may be formed between the second printed circuit board 132 and the rear cover 2. That is, the finger-shaped ground 134 may be changed from the first shape bent at the first angle θ 1 to the second shape bent at the second angle θ 2, and the second angle θ 2 may be greater than the first angle θ 1 with respect to a bonding surface with the second printed circuit board 132.

at this time, when the finger grounds 134 become the second shape, the difference d1-d2 between the first distance and the second distance and the elastic force F corresponding to the material of the finger grounds 134 are generated. At this time, the elastic force F may be provided to the second printed circuit board 132. Here, the second distance d2 may correspond to an assembly tolerance between the second printed circuit board 132 and the rear cover 2.

As a result, the finger-shaped ground 134 provides an elastic force F toward the direction of the connector 114 while forming a ground path between the second printed circuit board 132 and the rear cover 2, so that the second printed circuit board 132 can be indirectly prevented from being detached from the connector 114.

That is, when the rear cover 2 is coupled with the front cover 1, the protruding first distance d1 of the finger ground 134 causes a mutual repulsive force between the finger ground 134 and the rear cover 2 due to the elastic force of the finger ground 134 when being coupled with the rear cover 2. Thereby, the second printed circuit board 132 coupled to the finger-shaped ground 134 is pushed toward the connector 114 side, so that even if an assembly tolerance between the second printed circuit board 132 and the rear cover 2 is generated, the second printed circuit board 132 can be prevented from being detached from the connector 114. In addition, due to the protruding first distance d1 of the finger-shaped ground 134, a ground path can be formed between the second printed circuit board 132 and the rear cover 2 regardless of assembly tolerances between the second printed circuit board 132 and the rear cover 2.

Fig. 5A and 5B are diagrams showing an embodiment of the present invention provided to the finger-ground of the functional module.

Fig. 5A and 5B illustrate an embodiment of the finger ground 134, but are not limited thereto.

The finger ground 134 shown in fig. 5A may include: a main body 135 coupled to the second printed circuit board 132, a first bent part 136 bent in a first direction x1, and a second bent part 137 bent in a second direction x2 different from the first direction x 1.

The first and second bent portions 136 and 137 can prevent the second printed circuit board 132 from being bent when a ground path between the rear cover 2 and the second printed circuit board 132 is formed.

The finger ground 134 shown in fig. 5B may include first and second finger grounds 138, 139 spaced apart from each other.

In the embodiment, first and second finger grounds 138, 139 are depicted as being spaced apart from each other on the same side of printed circuit board 132 and bonded to printed circuit board 132, but may be spaced apart from and bonded to each other on opposite sides, but are not limited thereto.

That is, the first and second finger grounds 138, 139 may be joined at the second printed circuit board 132, and may be in a shape bent in the first direction x 1. At this time, the first finger-shaped ground 138 may be in a shape bent by a first degree, and the second finger-shaped ground 139 may be in a shape bent by a second degree smaller than or larger than the first degree, but is not limited thereto.

the degree of curvature of first and second finger contacts 138, 139 may vary depending on the position of connector 114, but is not limited thereto.

It is to be noted that the present invention is not limited to the above-described embodiments and the accompanying drawings, and various changes, modifications, and alterations can be made therein by those skilled in the art without departing from the scope of the present invention.