阅读说明：本技术 感应电机连接端子块 (Connecting terminal block of induction motor ) 是由 曹永吉 于 2019-04-05 设计创作，主要内容包括：本发明涉及一种感应电机连接端子块,该感应电机连接端子块包括：基座,具有多个绝缘表面；以及盖,用于覆盖基座的上表面,该感应电机连接端子块包括连接转换部,该连接转换部从盖的下表面向下延伸固定长度,其中,连接转换部沿盖的下表面的中心线在水平方向上具有固定长度,并且朝盖的下表面的一端方向偏置。(The invention relates to an induction motor connecting terminal block, which comprises: a base having a plurality of insulating surfaces; and a cover for covering an upper surface of the base, the induction motor connection terminal block including a connection converting part extending downward from a lower surface of the cover by a fixed length, wherein the connection converting part has the fixed length in a horizontal direction along a center line of the lower surface of the cover and is biased toward one end direction of the lower surface of the cover.)

1. An induction motor connection terminal block comprising:

a base (100) comprising a plurality of surfaces as insulators, an

A cover (200) covering an upper surface of the base (100), the induction motor connection terminal block further comprising:

a connection converting part (220) provided to extend a certain length in a downward direction from a lower surface of the cover (200),

wherein the connection converting part (220) is configured to: has a certain length in a horizontal direction along a center line of the lower surface of the cover (200), but the connection converting part (220) is positioned to be offset toward one end of the lower surface of the cover (200),

the first side of the connection converting part (220) is a conductor (C), an

The second side of the connection converting part (220) is a non-conductor (I).

2. The connection terminal block of an induction motor according to claim 1,

the connection converting part (220) includes a first connection converting lever (221), a second connection converting lever (222), and a third connection converting lever (223), the first connection converting lever (221), the second connection converting lever (222), and the third connection converting lever (223) being disposed to extend the certain length in a downward direction of the lower surface of the cover (200),

an interval between the first connection conversion lever (221) and the second connection conversion lever (222) is the same as an interval between the second connection conversion lever (222) and the third connection conversion lever (223), and

the second connection converting lever (222) is provided to extend downward from a point offset from the center of the center line of the lower surface of the cover (200).

3. The induction motor connection terminal block of claim 2, further comprising:

a first connection node (110), an R terminal coupled to the first connection node (110);

a second connection node (120), the S terminal being coupled to the second connection node (120);

a third connection node (130), a T terminal coupled to the third connection node (130);

a sixth connection node (160), the sixth connection node (160) facing the first connection node (110);

a fourth connection node (140), the fourth connection node (140) facing the second connection node (120); and

a fifth connection node (150), the fifth connection node (150) facing the third connection node (130), the connection node being disposed inside the base (100), and the induction motor connection terminal block further comprising:

a first front contact (111) arranged to extend in a direction from the first connection node (110) to the sixth connection node (160);

a sixth front contact (161) arranged to extend in a direction from the sixth connection node (160) to the first connection node (110);

a second front contact (121) arranged to extend in a direction from the second connection node (120) to the fourth connection node (140);

a fourth front contact (141) arranged to extend in a direction from the fourth connection node (140) to the second connection node (120);

a third front contact (131) arranged to extend in a direction from the third connection node (130) to the fifth connection node (150); and

a fifth front contact part (151) provided to extend in a direction from the fifth connection node (150) to the third connection node (130), and the induction motor connection terminal block further includes:

a first connection transition receptacle (171) positioned between the first connection node (110) and the sixth connection node (160), but positioned adjacent the first front contact (111) and the sixth front contact (161);

a second connection conversion portion receptacle (172) positioned between the second connection node (120) and the fourth connection node (140), but positioned near the second front contact (121) and the sixth front contact (161); and

a third connection conversion portion receptacle (173) positioned between the third connection node (130) and the fifth connection node (150), but positioned near the third front contact (131) and the fifth front contact (151), and wherein,

in a first state in which the cover (200) is mounted on the upper surface of the base (100), the first connection conversion lever (221) is positioned between the first front contact portion (111) and the sixth front contact portion (161);

the second connection conversion lever (222) is positioned between the second front contact part (121) and the fourth front contact part (141); and is

The third connection converting lever (223) is positioned between the third front contact part (131) and the fifth front contact part (151), and wherein,

in a second state in which the cover (200) is mounted on the upper surface of the base (100), the first connection converting lever (221) is positioned in the third connection converting portion accommodating portion (173);

the second connection converting lever (222) is positioned in the second connection converting part accommodating part (172); and

the third link conversion lever (223) is positioned in the first link conversion part accommodation part (171), and wherein the second state is a state in which the cover (200) in the first state covers the upper surface of the base (100) in a state in which it has been rotated at an angle of 180 degrees.

4. The connection terminal block of an induction motor according to claim 3,

in the first state, a first side of the first connection changeover lever (221) as the conductor (C) is in contact with the sixth front contact portion (161);

a second side of the first connection changeover lever (221) as the nonconductor (I) is in contact with the first front contact portion (111);

a first side of the second connection converting lever (222) as the conductor (C) is in contact with the fourth front contact part (141);

a second side of the second connection converting lever (222) as the nonconductor (I) is in contact with the second front contact part (121);

a first side of the third connection converting lever (223) as the conductor (C) is in contact with the fifth front contact part (151); and

a second side of the third connection converting lever (223) as the nonconductor (I) is in contact with the third front contact part (131), and wherein an upper portion of the first side of the first connection converting lever (221), an upper portion of the first side of the second connection converting lever (222), and an upper portion of the first side of the third connection converting lever (223) are electrically connected.

Technical Field

The present invention relates to a 220V/380V bi-directional induction motor connection terminal block, and more particularly to the following induction motor connection terminal block: in the induction motor connection terminal block, the cover of the induction motor connection terminal block, which is mounted on the upper surface of the base, is separated from the base, and the cover is mounted on the upper surface of the base again after rotating the cover in the horizontal direction by an angle of 180 degrees, so that the connection state of the induction motor connection terminal block can be easily switched without inconvenience experienced in the following related art: in the related art, when it is necessary to change a voltage to 380V to apply a voltage of 380V to an induction motor operated by a voltage of 220V, or when it is necessary to change a voltage to 220V to apply a voltage of 220V to an induction motor operated by a voltage of 380V, it is necessary to switch a connection state by disconnecting an existing connection and reconnecting to perform the connection.

Background

Starting methods of three-phase induction motors widely used for industrial or household use include a Y-shaped (Y) starting method and a delta (Δ) starting method. In the Y-start method, three wires of each phase of the induction motor coil are bundled together, and the other three wires are connected to each phase, respectively, so that the Y-start method is used in the case where the supply voltage is high voltage (e.g., 380V), and in the delta-start method, each wire is connected to the tail of each other in a manner of forming a closed loop so that the delta-start method is used in the case where the supply voltage is low voltage (e.g., 220V).

Referring to fig. 1, in the case where a bidirectional three-phase induction motor 220V/380V is supplied with power through an R terminal, an S terminal, and a T terminal, delta connection must be made when the voltage of the power supply is 220V, and Y connection must be made when the voltage of the power supply is 380V.

As the applied voltage changes, the connection state must be switched accordingly, but there is usually an inconvenience in having to disconnect the existing connection and make a new connection.

Hereinafter, as an example of the related art, korean utility model application laid-open publication No. 20-2011-.

Disclosure of Invention

Technical problem

In order to solve the above-mentioned problems according to the related art, an object of the present invention is to provide an induction motor connection terminal block capable of easily switching a connection state in a three-phase induction motor.

Another object of the present invention is to provide an induction motor connection terminal block having improved safety when the connection terminal block is operated.

In addition, an object of the present invention is to provide an induction motor connection terminal block capable of clearly recognizing a voltage of a current power supply and clearly recognizing a switching voltage even after a connection state is switched.

Technical solution

According to the present invention to solve the problems caused by the related art described above, an induction motor connection terminal block includes: a base (100) including a plurality of surfaces as insulators; and a cover (200) covering an upper surface of the base (100), and the induction motor connection terminal block further includes: a connection converting part (220) provided to extend a certain length from a lower surface of the cover (200) in a downward direction, wherein the connection converting part (220) is provided to: has a certain length in the horizontal direction along the center line of the lower surface of the cover (200), but the connection converting part (220) is positioned to be offset toward one end of the lower surface of the cover (200).

Preferably, the first side of the connection converting part (220) is a conductor C, and the second side of the connection converting part (220) is a non-conductor I.

Preferably, the connection converting part (220) may include a first connection converting lever (221), a second connection converting lever (222), and a third connection converting lever (223), the first connection converting lever (221), the second connection converting lever (222), and the third connection converting lever (223) may be disposed to extend by a certain length in a downward direction of the lower surface of the cover (200), an interval between the first connection converting lever (221) and the second connection converting lever (222) may be the same as an interval between the second connection converting lever (222) and the third connection converting lever (223), and the second connection converting lever (222) may be disposed to extend downward from a point located off-center of the center line of the lower surface of the cover (200).

Preferably, the induction motor connection terminal block may further include: a first connection node (110), the R terminal being coupled to the first connection node (110); a second connection node (120), the S terminal being coupled to the second connection node (120); a third connection node (130), the T terminal being coupled to the third connection node (130); a sixth connection node (160), the sixth connection node (160) facing the first connection node (110); a fourth connection node (140), the fourth connection node (140) facing the second connection node (120); and a fifth connection node (150), the fifth connection node (150) facing the third connection node (130), the connection node being disposed inside the base (100), and the induction motor connection terminal block may further include: a first front contact (111) provided to extend in a direction from the first connection node (110) to the sixth connection node (160); a sixth front contact (161) provided to extend in a direction from the sixth connection node (160) to the first connection node (110); a second front contact (121) provided to extend in a direction from the second connection node (120) to the fourth connection node (140); a fourth front contact (141) provided to extend in a direction from the fourth connection node (140) to the second connection node (120); a third front contact (131) provided to extend in a direction from the third connection node (130) to the fifth connection node (150); and a fifth front contact part (151) provided to extend in a direction from the fifth connection node (150) to the third connection node (130), and the induction motor connection terminal block may further include: a first connection transition receiving portion (171) positioned between the first connection node (110) and the sixth connection node (160), but positioned near the first front contact portion (111) and the sixth front contact portion (161); a second connection conversion part accommodating part (172) positioned between the second connection node (120) and the fourth connection node (140), but positioned near the second front contact part (121) and the sixth front contact part (161); and a third connection converting part accommodating part (173) positioned between the third connection node (130) and the fifth connection node (150) but positioned near the third front contact part (131) and the fifth front contact part (151), and wherein the first connection converting lever (221) may be positioned between the first front contact part (111) and the sixth front contact part (161) in a first state in which the cover (200) may be mounted on the upper surface of the base (100); the second connection converting lever (222) may be positioned between the second front contact part (121) and the fourth front contact part (141); and the third connection converting lever (223) may be positioned between the third front contact part (131) and the fifth front contact part (151), and wherein the first connection converting lever (221) may be positioned in the third connection converting part receiving part (173) in a second state in which the cover (200) may be mounted on the upper surface of the base (100); a second connection converting lever (222) may be positioned in the second connection converting part receiving part (172); and the third link conversion lever (223) may be positioned in the first link conversion part accommodation part (171), and wherein the second state may be a state in which the cover (200) in the first state may cover the upper surface of the base (100) in a state in which it has been rotated at an angle of 180 degrees.

Preferably, in the first state, a first side of the first connection changeover lever (221) as the conductor C may be in contact with the sixth front contact portion (161); a second side of the first connection converting lever (221) as the nonconductor I may be in contact with the first front contact portion (111); a first side of the second connection converting lever (222) as the conductor C may be in contact with the fourth front contact part (141); a second side of the second connection converting lever (222) as the nonconductor I may contact the second front contact part (121); a first side of the third connection converting lever (223) as a conductor C may be in contact with the fifth front contact part (151); a second side of the third connection converting lever (223), which is a non-conductor I, may be in contact with the third front contact part (131), and wherein an upper portion of the first side of the first connection converting lever (221), an upper portion of the first side of the second connection converting lever (222), and an upper portion of the first side of the third connection converting lever (223) may be electrically connected.

Advantageous effects

Due to the above-described solution of the problem, in the case where the voltage to be applied is changed to the state of 380V by switching from the state of 220V applied, the cover is separated from the base, and after rotating the cover by an angle of 180 degrees, the cover is mounted on the upper surface of the base again, so that the connection state can be easily changed to the changed voltage. However, in the case where it is necessary to change the applied voltage from the state of 380V to 220V, the connection state can be switched by simply removing, rotating, and mounting the cover to the upper surface of the base again, so that the voltage of 220V can be applied.

In addition, since the cover covers all upper surfaces of the base, electrical stability is improved.

Further, the connection state suitable for the currently applied voltage can be clearly identified, and further, even after the connection state is changed, the voltage to be applied can be clearly identified from the changed connection state.

Drawings

Fig. 1 is a diagram showing a connection state depending on an applied voltage in a 220V/380V bidirectional induction motor.

Fig. 2 is a perspective view showing an induction motor connection terminal block of the present invention.

Fig. 3 is an exploded perspective view illustrating an induction motor connection terminal block of the present invention.

Fig. 4 is a view showing a cover in the induction motor connection terminal block of the present invention.

Fig. 5 is a view showing a base including a plurality of insulator surfaces in the induction motor connection terminal block of the present invention.

Fig. 6 is a diagram showing a state in which a connection state is switched according to a position of a cover mounted on an upper surface of a base of the present invention.

Detailed Description

Hereinafter, exemplary embodiments of the present invention will be described with reference to the accompanying drawings. In this process, the thickness of lines or the size of components shown in the drawings may be exaggerated for clarity and convenience of description. In addition, terms specifically defined in consideration of functions of the present invention may be different according to intention or practice of a user or an operator. Therefore, it should be understood that the definitions of these terms should be made based on the contents throughout the specification.

Referring to fig. 2 to 5, an induction motor connection terminal block according to the present invention will be described.

In fig. 2 to 5, the position of the cover (200) and the position of the base (100) when the cover (200) is mounted on the upper surface of the base (100) are shown, and the position of the cover (200) and the position of the base (100) will be a first state described later.

In the present invention, "electrical connection" or "electrically connected" refers to a connection through which an electric current can flow.

The induction motor connection terminal block according to the present invention includes: a base (100), the base (100) comprising a plurality of insulating surfaces; and a cover (200), the cover (200) being mounted on the upper surface of the base (100) to cover the upper surface of the base (100).

A connection converting part (220) is provided on the lower surface of the cover (200).

The connection converting part (220) is provided to extend a certain length from the lower surface of the cover (200) in a downward direction. When the cover (200) is mounted on the upper surface of the base (100), the connection converting part (220) provided to extend from the lower surface of the cover (200) is inserted into the base (100), and the connection converting part (220) is positioned between the plurality of front contact parts (111), (121), (131), (141), (151), and (161) described later, or is received and positioned in the plurality of connection converting part receiving parts (171), (172), and (173) described later.

According to the position in which the connection converting part (220) is positioned inside the base (100), a Y-shaped (Y) connection or a triangular (delta) connection is established. Therefore, when the position of the cover (200) mounted on the base (100) is changed, the connection state can be switched from the Y-connection to the delta-connection or from the delta-connection to the Y-connection. The cover (200) mounted on the upper surface of the base (100) is separated from the upper surface of the base (100), and then after the cover (200) is rotated at an angle of 180 degrees, the cover (200) is mounted on the upper surface of the base (100) again, so that the connection state can be switched.

The connection converting part (220) includes a first connection converting lever (221), a second connection converting lever (222), and a third connection converting lever (223), and the first connection converting lever (221), the second connection converting lever (222), and the third connection converting lever (223) are provided to extend a certain length in a downward direction from a lower surface of the cover (200).

The length of the first connection conversion lever (221), the length of the second connection conversion lever (222), and the length of the third connection conversion lever (223) may be the same, and the interval between the first connection conversion lever (221) and the second connection conversion lever (222) and the interval between the second connection conversion lever (222) and the third connection conversion lever (223) may be the same.

Further, an interval between the first connection converting lever (221) and the second connection converting lever (222) is the same as an interval between the first front contact part (111) and the second front contact part (121) (or an interval between the sixth front contact part (161) and the fourth front contact part (141)) which will be described later, and an interval between the second connection converting lever (222) and the third connection converting lever (223) may be the same as an interval between the second front contact part (121) and the third front contact part (131) (or an interval between the fourth front contact part (141) and the fifth front contact part (151)).

Further, an interval between the first connection converting lever (221) and the second connection converting lever (222) is the same as an interval between a first connection converting part accommodating part (171) and a second connection converting part accommodating part (172) which will be described later, and an interval between the second connection converting lever (222) and the third connection converting lever (223) may be the same as an interval between the second connection converting part accommodating part (172) and the third connection converting part accommodating part (173).

In a first state, which will be described later, in which the cover (200) is mounted on the upper surface of the base (100), the connection converting part (220) may be inserted between the front contact parts (111), (121), (131), (141), (151), and (161). In a second state, which will be described later, in which the cover (200) is mounted on the upper surface of the base (100), the connection converting part (220) may be received and positioned in the connection converting part receiving parts (171), (172), and (173).

The connection converting part (220) is provided to have a certain length in a horizontal direction along a center line of a lower surface of the cover (200). The centerline connects one end of the cover (200) to the other end of the cover (200), one end of the cover (200) to a detachable portion that is detachable with respect to a first side of the base (100), and the other end of the cover (200) to a detachable portion that is detachable with respect to a second side of the base (100). Along the center line, the connection converting part is provided to have a certain length to extend to the lower surface of the cover (200).

Specifically, in a state where an upper portion of the first connection conversion lever (221), an upper portion of the second connection conversion lever (222), and an upper portion of the third connection conversion lever (223) are integrally connected and provided to a certain length, the connection conversion part may be in a state of being integrally coupled to a lower surface of the cover (200).

The connection converting portion (220) is provided along a center line of a lower surface of the cover (200), and is positioned to be offset toward one end of the lower surface of the cover (200). Specifically, the connection converting part includes a first connection converting lever (221), a second connection converting lever (222), and a third connection converting lever (223), wherein the connection converting part is not positioned at an equal interval from both ends of the lower surface of the cover (200), but is biased in the direction of either end of the connection converting part. For example, a distance from one end of the lower surface of the cover (200) to the first connection converting lever (221) and a distance from the other end of the lower surface of the cover (200) to the third connection converting lever (223) may be different. That is, the second connection converting lever (222) positioned at the center of the connection converting part (220) in the horizontal direction may be provided to extend downward from a point positioned off the center of the center line of the lower surface of the cover (200).

Since the connection converting portion (220) is biased toward one end of the lower surface of the cover (200), the position of the connection converting portion (220) inserted into the base (100) can be changed by horizontally rotating the cover (200) at an angle of 180 degrees, and by this conversion, the connection state can be easily switched from the Y-connection to the triangular connection or from the triangular connection to the Y-connection.

The first side of the connection converting part (220) may be a conductor C, and the second side of the connection converting part (220) corresponding to the first side of the connection converting part (220) may be a non-conductor I.

In a first state in which the connection converting part (220) is inserted between the front contact parts (111), (121), (131), (141), (151), and (161), a first side of the connection converting part (220) as a conductor C is in contact with the sixth front contact part (161), the fourth front contact part (141), and the fifth front contact part (151), and further a second side of the connection converting part (220) as a non-conductor I is in contact with the first front contact part (111), the second front contact part (121), and the third front contact part (131).

When the second side of the connection converting part (220) as the nonconductor I is inserted between the plurality of front contacts (111), (121), (131), (141), (151), and (161), the electrical connection between the first connection node (110) and the sixth connection node (160), the electrical connection between the second connection node (120) and the fourth connection node (140), and the electrical connection between the third connection node (130) and the fifth connection node (150) are blocked, and the delta connection is disconnected.

The first side of the upper portion of the first connection converting lever (221), which is the conductor C, the first side of the upper portion of the second connection converting lever (222), and the first side of the upper portion of the third connection converting lever (223) are integrally connected, and thus in the first state described above, the sixth front contact portion (161), the fourth front contact portion (141), and the fifth front contact portion (151) are electrically connected to each other to form a Y-shaped connection state.

Meanwhile, in the second state in which the first connection conversion lever (221), the second connection conversion lever (222), and the third connection conversion lever (223) are accommodated and positioned in the above-described connection conversion part accommodation parts (171), (172), and (173), the Y-connection is disconnected and the delta connection is established. The detailed description will be described later.

The base (100) includes a plurality of surfaces that act as insulators. For the connection on such a plurality of surfaces, on which are positioned: a plurality of connecting nodes (110), (120), (130), (140), (150), and (160); a plurality of front contact portions (111), (121), (131), (141), (151), and (161); and a plurality of connection converting part receiving parts 171, 172 and 173.

The induction motor connection terminal block according to the present invention includes: a first connection node (110), the R terminal being coupled to the first connection node (110); a second connection node (120), the S terminal being coupled to the second connection node (120); a third connection node (130), the T terminal being coupled to the third connection node (130); a sixth connection node (160) facing the first connection node (110); a fourth connection node (140) facing the second connection node (120); and a fifth connection node (150) facing the third connection node (130), wherein the connection node is disposed inside the base (100).

In addition, the induction motor connection terminal block includes: a first front contact (111) provided to extend in a direction from the first connection node (110) to the sixth connection node (160); a sixth front contact (161) provided to extend in a direction from the sixth connection node (160) to the first connection node (110); a second front contact (121) provided to extend in a direction from the second connection node (120) to the fourth connection node (140); a fourth front contact (141) provided to extend in a direction from the fourth connection node (140) to the second connection node (120); a third front contact (131) provided to extend in a direction from the third connection node (130) to the fifth connection node (150); and a fifth front contact (151) provided to extend in a direction from the fifth connection node (150) to the third connection node (130).

In addition, the induction motor connection terminal block includes: a first connection transition receptacle (171) positioned between the first connection node (110) and the sixth connection node (160), but positioned adjacent the first front contact (111) and the sixth front contact (161); a second connection conversion part accommodating part (172) which is positioned between the second connection node (120) and the fourth connection node (140) but is positioned near the second front contact part (121) and the sixth front contact part (161); and a third connection conversion portion accommodating portion (173) positioned between the third connection node (130) and the fifth connection node (150) but positioned near the third front contact portion (131) and the fifth front contact portion (151).

Other connection nodes and terminals required for establishing connection of the induction motor are according to the related art.

In addition, the induction motor connection terminal block according to the present invention further includes a plurality of connection converting part stoppers (180), the plurality of connection converting part stoppers (180) being disposed at a certain height in a state of being inserted into each of the first connection converting part receiving part (171), the second connection converting part receiving part (172), and the third connection converting part receiving part (173).

The connection converting part blocking part (180) is positioned to be in close contact with side surfaces of the plurality of front contact parts (111), (121), (131), (141), (151), and (161), and a seating groove (182) having a shape dug in a downward direction is positioned on an upper surface of the connection converting part blocking part (180).

In a second state in which the cover (200) is mounted on the upper surface of the base (100), the connection converting part blocking part (180) blocks the connection converting levers (221), (222) and (223) to prevent the plurality of connection converting levers (221), (222) and (223) received and positioned in the plurality of connection converting part receiving parts (171), (172) and (173) from contacting the plurality of front contacting parts (111), (121), (131), (141), (151) and (161). This is to securely prevent the electrical connection of the sixth connection node (160), the fourth connection node (140), and the fifth connection node (150) in the second state in the delta connection state.

In the first state in which the cover (200) is mounted on the upper surface of the base (100), the connection converting part blocking part (180) completely eliminates the possibility that the connection converting levers (221), (222) and (223) are moved to the plurality of connection converting part receiving parts (171), (172) and (173) in a state of being inserted between the plurality of front contact parts (111), (121), (131), (141), (151) and (161), thereby improving electrical safety.

In the connection converting part (220), a portion formed between the first connection converting lever (221) and the second connection converting lever (222) and a portion formed between the second connection converting lever (222) and the third connection converting lever (223) are seated in the seating groove (182), thereby restricting the movement of the components.

A display hole (240) is provided on a first side of the cover (200), wherein a character display of 380V is displayed on a surface of the base (100) corresponding to the display hole (240) in a first state in which the cover (200) is mounted on the upper surface of the base (100); and displaying a character display of 220V on a surface of the base (100) corresponding to the display hole (240) in a second state in which the cover (200) is mounted on the upper surface of the base (100).

That is, 220V is displayed on one surface of any two surfaces of the base (100), and 380V is displayed on the other surface.

In order to display the current connection state when the cover (200) is mounted on the upper surface of the base (100), the user can check the connection state displayed on any one surface of the base (100) through the display hole (240). When a display shown as 220V on either surface of the base (100) through the display hole (240), the connection state indicates that a triangular connection of 220V is applied, and when a display shown as 380V, the connection state indicates that a Y-shaped connection of 380V is applied. Convenience of use is increased and a connection condition can be easily checked, thereby improving electrical safety.

This is described with reference to fig. 6.

Fig. 6 is a view showing a state in which the connection converting part (220) is inserted into the base (100) when viewed from above through the cover (200) shown in a transparent state.

In the induction motor connection terminal block according to the present invention, a process of switching the connection state from the Y-connection to the delta-connection or from the delta-connection to the Y-connection will be described.

Fig. 6(b) is a diagram showing a first state in which the cover (200) is mounted on the upper surface of the base (100), wherein the first connection converting lever (221) is positioned between the first front contact (111) and the sixth front contact (161), the second connection converting lever (222) is positioned between the second front contact (121) and the fourth front contact (141), and the third connection converting lever (223) is positioned between the third front contact (131) and the fifth front contact (151), so that the electrical connection between the first connection node (110) and the sixth connection node (160) is blocked, the electrical connection between the second connection node (120) and the fourth connection node (140) is blocked, and the electrical connection between the third connection node (130) and the fifth connection node (150) is blocked. However, the sixth front contact (161), the fourth front contact (141), and the fifth front contact (151) are electrically connected to each other, that is, the sixth connection node (160), the fourth connection node (140), and the fifth connection node (150) are electrically connected to each other, so that the Y-shaped connection state is maintained.

Fig. 6(b) is a diagram showing the following states: wherein a first side of the first connection changeover lever (221) as the conductor C is in contact with the sixth front contact portion (161); a second side of the first connection changeover lever (221) as a nonconductor I is in contact with the first front contact portion (111); a first side of the second connection switching lever (222) as a conductor C is in contact with the fourth front contact part (141); a second side of the second connection switching lever (222) as a nonconductor I is in contact with the second front contact part (121); a first side of the third connection converting lever (223) as a conductor C is in contact with the fifth front contact part (151); and a second side of the third connection converting lever (223) as the nonconductor I is in contact with the third front contact part (131).

Further, a surface of an upper portion of the first side of the first connection conversion lever (221), a surface of an upper portion of the first side of the second connection conversion lever (222), and a surface of an upper portion of the first side of the third connection conversion lever (223) are electrically connected, so that the sixth connection node (160), the fourth connection node (140), and the fifth connection node (150) are finally electrically connected, thereby maintaining the Y-shaped connection state.

Fig. 6(a) is a diagram showing a second state in which the cover (200) is mounted on the upper surface of the base (100), wherein, in a state in which the connection converting part (220) is positioned in the connection converting part receiving parts (171), (172), and (173), the first front contact part (111) and the sixth front contact part (161) contact each other, the second front contact part (121) and the fourth front contact part (141) contact each other, and the third front contact part (131) and the fifth front contact part (151) contact each other, so that the delta connection state is maintained.

That is, in a state in which the first connection converting lever (221) is positioned in the third connection converting portion accommodating portion (173), the second connection converting lever (222) is positioned in the second connection converting portion accommodating portion (172), and the third connection converting lever (223) is positioned in the first connection converting portion accommodating portion (171), the above-described delta connection state is maintained.

The cover (200) in the delta connection state shown in fig. 6(a) is separated from the upper surface of the base (100), and the cover (200) in this state is rotated at an angle of 180 degrees in the horizontal direction and then mounted on the upper surface of the base (100), thereby switching to the Y connection state shown in fig. 6 (b).

That is, without inconvenience of disconnecting and making a new connection according to an applied voltage, when only the cover (200) is separated from the upper surface of the base (100) and the cover is mounted on the upper surface of the base (100) after the cover (200) is rotated in a horizontal direction at an angle of 180 degrees, it is possible to easily switch from a delta connection to a Y connection or from a Y connection to a delta connection.

In the above, although the present specification has been described with reference to the embodiments shown in the drawings so that those skilled in the art can easily understand and implement the present invention again, these are only exemplary, and those skilled in the art will understand that various modifications and other equivalent embodiments are possible according to the embodiments of the present invention. Therefore, the technical scope of the present invention will be defined by the claims.