KR101754344B1 - Test terminal unit for distributing board - Google Patents

Abstract

A test terminal unit for an switchboard is disclosed. The test terminal unit for an ASSEMBLY according to an exemplary embodiment of the present invention includes three current test terminals CTT (CTT) having three phase phase terminals and neutral terminals in a three-phase four-wire line and electrically connecting a current transformer CT and a relay ) Blocks, four voltage test terminal (PTT) blocks having three-phase phase and neutral terminals and electrically connecting the transformer (PT) and the relays, wherein the current test terminal blocks and the voltage test terminal blocks The current test terminal blocks and the voltage test terminal blocks are hinged to the respective compartments, and the conductors, which are rotatably provided inside and outside the open ends of the compartments, A socket as a conductor which is provided inside each partition and is selectively connected to each of the rotation terminals, And the rotating terminals of the current test terminal blocks are integrally formed with the protruding portion protruding outwardly from the open end of the partition in a state electrically connected to the socket terminal and the protruding portion is connected to the relay from the current transformer based on the open end of the compartment A clamp through hole through which a current measuring clamp for measuring a supplied current can pass can be formed.

Description

[0001] TEST TERMINAL UNIT FOR DISTRIBUTING BOARD [0002]

BACKGROUND OF THE INVENTION 1. Field of the Invention [0002] The present invention relates to a switchboard of a power system facility, and more particularly, to a switchboard test terminal unit for testing whether a relay used in an switchboard is operated normally or not.

Generally, a substation is equipped with an electricity distribution panel that forms a connection point between a common electricity distribution network and a residential electrical circuit. These switchboards are electrically connected to CT (Current Transformer) and PT (Instrument Transformer) and constitute a relay that measures and monitors the power system (including voltage and current).

In addition, a test terminal unit for testing the voltage and current measurement operation of the relay is configured on the switchboard. The test terminal unit is equipped with a current test terminal (CTT) block that tests the current of the power system line connecting the CT and the relay, and a voltage test terminal (PTT) block that tests the voltage of the power system line connecting the PT and the relay .

These test terminal units can electrically connect the load power system of the CT and PT and the relay through the connection terminals of the current test terminal block and the voltage test terminal block. In this case, the load power system of CT and PT and the current and voltage supplied to the relay in the state where the relay is closed circuit can be measured.

In addition, the test terminal unit can electrically disconnect the load power system of the CT and the PT from the relay by opening the connection terminals of the current test terminal block and the voltage test terminal block. In this case, it is possible to test the relay by applying current and voltage through the current test terminal block and the voltage test terminal block.

Here, in order to measure the current supplied to the relay in a state in which the load power system of the CT is electrically connected to the relay through the current test terminal block, in the prior art, the CT provided on the rear side of the relay, The current is measured through the terminal block.

However, in the related art, the current measurement is troublesome because the current is measured through the CT terminal block provided on the rear side of the relay separately from the current test terminal block provided on the front side of the relay.

In the prior art, when the current is measured through the CT terminal block, the space of the control cable is secured and measured by the measuring equipment. At this time, excessive bending is repeated in the wire terminal of the control cable. There is a case where the wire terminal of the control cable is disconnected (disconnected) frequently.

Furthermore, in the conventional art, when measuring the current through the CT terminal, current measurement error may occur in the relay due to measurement of the current at a phase terminal other than the phase terminal to be measured, such as an operator's mistake or misunderstanding.

On the other hand, the test terminal unit in the prior art has a cover for protecting the current test terminal block and the voltage test terminal block, but the case is often lost by the external force.

In addition, in the prior art, as the connection terminals of the current test terminal block and the voltage test terminal block are electrically disconnected due to external force, a sub-operation of the relay circuit may cause a wide power failure of the substation.

The matters described in the background section are intended to enhance the understanding of the background of the invention and may include matters not previously known to those skilled in the art.

Embodiments of the present invention are directed to an apparatus and method for improving the workability of measuring current and voltage while electrically connecting a load power system of CT and PT to a relay through current test terminal blocks and voltage test terminal blocks We want to provide a test terminal unit.

In addition, the embodiment of the present invention provides a test terminal unit for an ASSEMBLY which can prevent a control cable disconnection and a current measurement error in a CT terminal block due to measurement of a current supplied from a CT to a relay.

Furthermore, an embodiment of the present invention provides a test terminal unit for an ASSEMBLY that can prevent electrical terminals of the current test terminal blocks and the voltage test terminal blocks from being separated from each other by the external force.

The test terminal unit for an ASSEMBLY according to the embodiment of the present invention includes four current test terminal (CTT) blocks having a three-phase phase terminal and a neutral terminal in a three-phase four-wire line and electrically connecting a current transformer CT and a relay And four voltage test terminal (PTT) blocks having a three-phase phase terminal and a neutral terminal and electrically connecting the transformer PT and the relay, wherein the current test terminal blocks and the voltage test terminal blocks are installed Wherein the current test terminal blocks and the voltage test terminal blocks are hinged to the respective compartments and are rotatably provided inside and outside the open ends of the compartments, A rotary terminal as a conductor, and a plurality of switching elements provided inside the respective partition sections and selectively connected to the rotary terminals Wherein the rotary terminal of the current test terminal blocks is integrally formed with the protruding portion protruding outside the open end of the partition in a state of being electrically connected to the socket terminal, A clamp through hole through which a current measuring clamp for measuring a current supplied from the current transformer to the relay can pass can be formed on the basis of the open end of the negative terminal.

In the test terminal unit for a switchboard according to an embodiment of the present invention, the rotary terminal may integrally form a terminal body and a connection portion protruding from the terminal body toward the socket terminal.

In the test terminal unit for a switchboard according to an embodiment of the present invention, the protruding portion may protrude from the terminal body to extend to the opposite side of the connecting portion, and the clamp through hole may be formed at the protruding end portion.

In the test terminal unit for a switchboard according to the embodiment of the present invention, a locking cover for opening and closing the open end and locking and unlocking the rotation of the rotary terminal is formed in each of the partition portions of the case member, As shown in Fig.

In the test terminal unit for a switchboard according to an embodiment of the present invention, the locking cover may be provided with an opening for exposing the protrusion to the outside of the open end of the partition.

In the test terminal unit for a switchboard according to an embodiment of the present invention, the protrusions may protrude through the openings of the locking cover with a height difference between the pair of current test terminal blocks.

In the test terminal unit for a switchboard according to an embodiment of the present invention, a semicircular guide groove for guiding a current measuring clamp may be formed on the entire surface of the locking cover with the opening hole interposed therebetween.

In addition, in the test terminal unit for a switchboard according to the embodiment of the present invention, the rotary terminal may include a handle of an insulating material provided at an upper end thereof.

In addition, in the test terminal unit for a switchboard according to the embodiment of the present invention, a supporting end for supporting the handle may be formed on an upper end of the locking cover.

In the test terminal unit for a switchboard according to the embodiment of the present invention, the case member may be provided with a locking member for locking the supporting end of the locking cover to the respective partition portions.

In the test terminal unit for a switchboard according to an embodiment of the present invention, the locking member passes through the case member and the support end along the arrangement direction of the partition, and one side surface of the case member is supported as a head And a locking nut which is fastened to the penetrating end of the locking rod passing through the other side surface of the case member.

In the test terminal unit for a switchboard according to an embodiment of the present invention, a through hole through which the locking rod penetrates may be formed in the partition portion and the support end of the case member.

Further, in the test terminal unit for a switchboard according to an embodiment of the present invention, a voltage measuring pin is fitted to the locking cover corresponding to the voltage test terminal blocks, and a voltage measuring instrument for guiding the voltage measuring pin to the rotating terminal Holes may be formed.

Embodiments of the present invention can measure the current through the protrusion of the current test terminal blocks on the front side of the relay without measuring the current through the CT terminal block provided on the rear side of the relay, The work time can be shortened and the workability of the current measurement can be improved.

Further, in the embodiment of the present invention, since the voltage measuring pins in the voltage test terminal blocks are inserted into the voltage measurement holes of the locking cover and are brought into contact with the rotating terminals, the voltage can be measured, thereby further improving the voltage measuring workability.

Further, in the embodiment of the present invention, by locking the locking cover to the compartments of the case member by the locking member, it is possible to prevent the locking cover from being easily separated from the case member and lost, It is possible to prevent the rotating terminals and the socket terminals of the test terminal blocks from being electrically separated from each other by an external force.

In addition, effects obtainable or predicted by the embodiments of the present invention will be directly or implicitly disclosed in the detailed description of the embodiments of the present invention. That is, various effects to be predicted according to the embodiment of the present invention will be disclosed in the detailed description to be described later.

These drawings are for the purpose of describing an exemplary embodiment of the present invention, and therefore the technical idea of the present invention should not be construed as being limited to the accompanying drawings.
1 and 2 are combined perspective views illustrating a test terminal unit for an ASS according to an embodiment of the present invention.
3 is an exploded perspective view showing a test terminal unit for an ASSB according to an embodiment of the present invention.
4 is a schematic view illustrating terminal components of a current test terminal block and a voltage test terminal block applied to a test terminal unit for an ASSP according to an embodiment of the present invention.
5 is a diagram showing a state of measuring a current through a current test terminal block applied to a test terminal unit for a switchboard according to an embodiment of the present invention.
FIG. 6 is a diagram illustrating a state where a voltage is measured through a voltage test terminal block applied to a test terminal unit for an ASSB according to an embodiment of the present invention. Referring to FIG.

Hereinafter, exemplary embodiments of the present invention will be described in detail with reference to the accompanying drawings, which will be readily apparent to those skilled in the art to which the present invention pertains. The present invention may, however, be embodied in many different forms and should not be construed as limited to the embodiments set forth herein.

In order to clearly illustrate the present invention, parts not related to the description are omitted, and the same or similar components are denoted by the same reference numerals throughout the specification.

It is to be understood that both the foregoing general description and the following detailed description of the present invention are exemplary and explanatory and are intended to provide further explanation of the invention as claimed.

In the following detailed description, the names of components are categorized into the first, second, and so on in order to distinguish them from each other in the same relationship, and are not necessarily limited to the order in the following description.

Throughout the specification, when an element is referred to as "comprising ", it means that it can include other elements as well, without excluding other elements unless specifically stated otherwise.

It should be noted that terms such as " ... unit ", "unit of means "," part of item ", "absence of member ", and the like denote a unit of a comprehensive constitution having at least one function or operation it means.

1 and 2 are perspective views showing a test terminal unit for a switchboard according to an embodiment of the present invention, and FIG. 3 is an exploded perspective view of FIG.

1 to 3, a test terminal unit 100 for an ASSP according to an embodiment of the present invention can be applied to an ASSEMBLY installed to supply, control, and protect electrical energy in a substation.

For example, the switchboard is electrically connected to a transformer (hereinafter referred to as " CT "for convenience) and a transformer for meters (hereinafter referred to as" PT " A relay can be constructed.

The test terminal unit 100 for a switchboard according to an embodiment of the present invention is for testing whether a voltage and current measurement operation of a relay is normal or not. The test terminal unit 100 for a switchboard is connected to a load power system of the CT and the PT, The supplied current and voltage can be measured.

Also, the test terminal unit 100 for a switchboard according to the embodiment of the present invention can test the relay by applying current and voltage while electrically separating the load power system of CT and PT from the relay.

The test terminal unit 100 for a switchboard has three phases (for example, A, B, and C phases) and three terminals (N, for example) in a three-phase four-wire line and electrically connects the CT and the relay And four current test terminal (CTT) blocks 10.

The test terminal unit 100 for the switchboard includes four voltage test terminals (not shown) having phase terminals of three phases (for example, A, B and C phases) and neutral terminals (PTT) block 30.

The current test terminal blocks 10 and the voltage test terminal blocks 30 may electrically disconnect or connect the load power system of the CT and the PT with the relay through the hinge type terminal (connection terminal).

The test terminal unit 100 for a switchboard according to the embodiment of the present invention may be configured as an integrated test terminal unit in which the current test terminal blocks 10 and the voltage test terminal blocks 30 are integrated.

To this end, the embodiment of the present invention includes an insulating case member 50 for integrally forming the current test terminal blocks 10 and the voltage test terminal blocks 30.

The case member 50 integrally defines a plurality of compartments 51 on which the current test terminal blocks 10 and the voltage test terminal blocks 30 are installed. Each of the dividing sections 51 is formed with an open end 53 at its front surface and the terminal parts of the current test terminal blocks 10 and the voltage test terminal blocks 30 are installed inside the open end 53 have.

4, the current test terminal blocks 10 and the voltage test terminal blocks 30 are connected to a common terminal (not shown in the figure) electrically connected to the load power system of CT and PT respectively And a rotary terminal 21 and a socket terminal 23 as conductors (conductors), respectively.

The rotary terminal 21 is hinged to the inside of each partition 51 of the case member 50 at a hinge terminal HT of the known art and is rotatable inside and outside the open end 53 of the partition 51 Respectively. The socket terminal 23 is provided inside each partition portion 51 corresponding to the rotary terminal 21 and is selectively connectable to the rotary terminal 21.

The rotary terminal 21 functions to electrically short-circuit or open the hinge terminal HT and the socket terminal 23 securing the power system line of the CT / PT and the relay. The rotary terminal 21 has a terminal body 22a hinged to the hinge terminal HT and a connection part protruding from the terminal body 22a toward the socket terminal 23 and selectively connected to the socket terminal 23 22b are integrally formed. A handle portion 22c of an insulating material is formed at an upper end portion of the terminal body 22a.

Since the electrical terminal connection configuration of the current test terminal blocks 10 and the voltage test terminal blocks 30 is made of the configuration of a known relay current / voltage test terminal block well known in the art, Will not be described in detail.

Therefore, the current test terminal blocks 10 and the voltage test terminal blocks 30 rotate the rotation terminal 21 to the inside of the partition 51 through the open end 53, When the connection portion 22b is connected to the socket terminal 23, the load power system of CT and PT can be electrically connected to the relay. Therefore, in the embodiment of the present invention, the load power system of CT and PT and the current and voltage supplied to the relay in a state where the relay is closed circuit can be measured.

The current test terminal blocks 10 and the voltage test terminal blocks 30 rotate the rotary terminal 21 to the outside of the open end 53 and connect the connection portion 22b of the rotary terminal 21 to the socket terminal 23), the load power system of the CT and the PT can be electrically separated from the relay. Therefore, in the embodiment of the present invention, current and voltage are applied through the current test terminal blocks 10 and the voltage test terminal blocks 30, and the relay test can be performed.

The test terminal unit 100 for the switchboard according to the embodiment of the present invention as described above electrically connects the load power system of CT and PT and the relay through the current test terminal blocks 10 and the voltage test terminal blocks 30 And the workability of measuring the current and the voltage in the connected state can be improved.

In addition, the embodiment of the present invention provides a test terminal unit 100 for a switchboard capable of preventing the disconnection of the control cable of the CT terminal and the measurement of the current due to the measurement of the current supplied from the CT to the relay.

Further, the embodiment of the present invention is capable of preventing electric terminals of the current test terminal blocks 10 and the voltage test terminal blocks 30 from being electrically disconnected from the rotary terminal 21 and the socket terminal 23 by an external force To provide a test terminal unit (100) for a switchboard.

To this end, the test terminal unit 100 for a switchboard according to the embodiment of the present invention first includes a protrusion 25 integrally formed with the rotary terminal 21 of the current test terminal block 10.

The protrusion 25 is for improving the workability of measuring the current and the voltage in a state where the load power system of the CT and the relay are electrically connected through the current test terminal blocks 10.

That is, the protruding structure of the rotary terminal 21 according to the embodiment of the present invention is different from the current test terminal block 10 provided on the front side of the relay, as in the prior art, For measuring the current directly through the current test terminal blocks 10 without measuring the current through the terminal block.

The projecting portion 25 is formed integrally with the terminal body 22a of the rotary terminal 21 so that the connection portion 22b of the rotary terminal 21 is connected to the socket terminal 23 And protrudes outside the open end 53 of each partition part 51 of the case member 50 in an electrically connected state.

The protruding portion 25 is protruded from the terminal body 22a so as to extend to the opposite side of the connection portion 22b. 5, the protruding portion 25 has a clamp through hole (not shown) through which a current measuring clamp TC for measuring the current supplied from the CT to the relay is formed, based on the open end 53 of the dividing portion 51, (27).

Here, the current measurement clamp (TC) is a clamp type current measurement device widely known in the art for measuring a current supplied from a CT to a relay using a clamp or a finger type clamp. The current measuring clamp TC can measure the current with the clamps in the form of clamps or fingers passing through the clamp through holes 27 of the protrusions 25 and in contact with each other.

This clamp through hole 27 is formed from the middle of the protrusion 25 to the protruding end side of the protrusion 25 protruding outside the open end 53 of the partition 51 as shown in the figure, Or may be formed to extend from the terminal body 22a to the end of the protrusion 25.

Alternatively, the projecting portion 25 is not necessarily formed integrally with the terminal body 22a to form the clamp through-hole 27, but the terminal body 22a itself may be planarly planarly planar- The bending portion may be formed to protrude outward from the open end 53 of the partition portion 51. In this case, an inner region of the projecting end portion of the projecting portion 25 can be formed as the clamping hole 27 when the open end 53 of the partitioning portion 51 is referred to.

The protrusions 25 may protrude from the rotary terminals 21 with a height difference between the pair of the current test terminal blocks 10. For example, in the current test terminal block 10, the protruding portion 25 in the partition portion 51 corresponding to the "A" phase terminal may be formed so as to protrude from the upper side of the rotary terminal 21. The protruding portion 25 may protrude from the lower portion of the rotary terminal 21 in the partition portion 51 corresponding to the "B" phase terminal. The projecting portion 25 may be formed to protrude from the upper portion of the rotary terminal 21 in the partitioning portion 51 corresponding to the "C" phase terminal. The protruding portion 25 may protrude from the lower portion of the rotary terminal 21 in the partition portion 51 corresponding to the "N" neutral terminal.

The test terminal unit 100 for a switchboard according to an embodiment of the present invention includes the current test terminal blocks 10 and the voltage test terminal block 30 in the case member 50, And a locking cover 70 for opening and closing the open ends 53 of the partitioning portions 51 provided in the partitioning portions 51 and for locking and unlocking the rotary terminals 21 in the partitioning portions 51, respectively.

In the embodiment of the present invention, the locking cover 70 is made of an insulating material and is rotatably coupled to the lower portion of each partition portion 51. The locking cover 70 has a support end 71 having a circular cross section for supporting the handle portion 22c of the rotary terminal 21 at its upper end.

Hinge protrusions 73 hinged to the lower ends of the compartments 51 are formed on both sides of the lower end of the locking cover 70. The locking cover 70 rotates outward at the open end 53 of the partition portion 51 with the hinge protrusion 73 as the center and opens the open end 53 of the locking cover 70. When the hinge protrusion 73 is moved from the center So that the open end 53 can be closed.

The locking cover 70 forms an opening 75 for exposing the projecting portion 25 of the rotary terminal 21 described above to the outside of the open end 53 of the partition portion 51. The projecting portion 25 formed on the rotary terminal 21 with a height difference may protrude outside the open end 53 of the partitioning portion 51 through the opening hole 75 of the locking cover 70 have.

Further, in the embodiment of the present invention, a guide groove 77 for guiding the clamp or the finger of the current measuring clamp TC is formed on the front surface of the locking cover 70. The guide groove 77 is for guiding the clamp or the finger of the current measuring clamp TC to the opening hole 75. A semicircular groove 72 is formed on the front surface of the locking cover 70 with the opening hole 75 therebetween. .

The current measurement clamp TC passes through the clamp hole 27 of the protrusion 25 while being guided to the opening hole 75 through the guide groove 77 and is capable of measuring the current while being in contact with each other.

6, the locking cover 70 of the compartments 51 corresponding to the voltage test terminal blocks 30 in the embodiment of the present invention is provided with a voltage measurement hole 79 are formed.

Here, the voltage measuring pin TP is provided as a needle-shaped conductor pin for measuring a voltage of a power source supplied from the PT to the relay. The voltage measuring pins TP are inserted into the voltage measuring holes 79 of the locking cover 70 and are capable of measuring a voltage in a state of being in contact with the rotary terminals 21 of the voltage test terminal blocks 30.

The voltage measuring hole 79 is formed in the inside of the dividing section 51 so that the voltage measuring pin TP can be easily inserted into the inside of the dividing section 51 so as to easily contact the rotating terminal 21 of the voltage test terminal blocks 30. [ So that it functions as a guide to the terminal 21.

On the other hand, the test terminal unit 100 for a switchboard according to the embodiment of the present invention can be used for locking the locking cover 70 to the respective compartments 51 of the case member 50, as in the above- And a locking member (90)

The locking member 90 prevents the locking cover 70 from being easily separated from the case member 50 and is prevented from being lost and that the rotation of the current test terminal blocks 10 and the voltage test terminal blocks 30 This is to prevent the terminal 21 and the socket terminal 23 from being electrically disconnected. The locking member 90 is installed in the case member 50 and the locking cover 70 to lock the supporting end 71 of the locking cover 70 to each partition 51. [

The locking member 90 includes a locking rod 91 and a locking nut 93. The locking rod 91 is provided as a rod bolt type in which a head 95 is formed at one end and a screw thread 97 is formed at the other end.

The locking rod 91 penetrates through the case member 50 and the supporting end 71 of the locking cover 70 along the direction of arrangement of the dividing portions 51 and extends through the head 95 to the side of the case member 50 Supports one side.

A through hole 98 through which the locking rod 91 passes is formed in the partitioning portion 51 of the case member 50 and the supporting end 71 of the locking cover 70. The through holes 98 are connected to each other along the direction in which the partition portions 51 are arranged.

The locking nut 93 is fastened to the penetrating end portion (the other end portion) of the locking rod 91 passing through the other side surface of the case member 50. The threaded portion 97 of the locking rod 91, And supports the other side surface of the case member 50. As shown in Fig.

Hereinafter, the operation of the test terminal unit 100 for a switchboard according to the embodiment of the present invention will be described in detail with reference to the drawings.

4, the current test terminal blocks 10 and the rotating terminals 21 of the voltage test terminal blocks 30 are connected to each other through open ends 53 of the compartments 51, As shown in Fig.

The connection portion 22b of the rotary terminal 21 is in a state of being electrically connected to the socket terminal 23. Therefore, in the embodiment of the present invention, the load power system and the relay of CT and PT are electrically connected through the current test terminal blocks 10 and the voltage test terminal blocks 30.

In this case, the projecting portions 25 of the rotary terminal 21 in the current test terminal blocks 10 are protruded outside the open end 53 of each partition portion 51 of the case member 50, And protrudes outside the open end 53 of the partitioning portion 51 through the opening hole 75 of the locking cover 70.

1, in the embodiment of the present invention, the locking cover 70 closes the open end 53 of the partitioning portions 51 of the case member 50, and by the locking member 90, (51). ≪ / RTI > At this time, the locking cover 70 supports the handle portion 22c of the rotary terminal 21 through the support end 71 in a state of being locked to the partitioning portions 51 by the locking member 90 .

As a result, in the embodiment of the present invention, as the locking cover 70 is locked to the partitioning portions 51 of the case member 50 by the locking member 90, the locking cover 70 is moved from the case member 50 It can be easily separated and lost.

Further, in the embodiment of the present invention, as the locking cover 70 is locked to the compartments 51 of the case member 50 by the locking member 90, the current test terminal blocks 10 and the voltage test terminals 10, It is possible to prevent the rotating terminal 21 and the socket terminal 23 of the blocks 30 from being electrically separated from each other by an external force.

Therefore, according to the embodiment of the present invention, the rotation of the relay terminal 21 due to the external force from the socket terminal 23 can be prevented, and the occurrence of a wide-scale power outage of the substation can be prevented.

Meanwhile, in the embodiment of the present invention, the load power system of CT and PT is electrically connected to the relay through the current test terminal blocks 10 and the voltage test terminal blocks 30, Current and voltage can be measured.

5, in the current test terminal blocks 10, the current measuring clamp TC in the form of a forceps or a finger is inserted into the guide groove 77 of the locking cover 70 Then, the clamping operation is performed. Then, in the embodiment of the present invention, the current measurement clamp TC can be passed through the clamp hole 27 of the protrusion 25 and the current can be measured while being in contact with each other.

6, in the voltage test terminal block 30, the voltage measuring pins TP are inserted into the voltage measuring holes 79 of the locking cover 70, The voltage can be measured while the pin TP is in contact with the rotary terminal 21. [ Since the voltage measuring hole 79 of the locking cover 70 guides the voltage measuring pin TP to the rotary terminal 21 inside the partitioning portion 51, 21).

Therefore, in the embodiment of the present invention, the current is not measured through the CT terminal block provided on the rear side of the relay as in the prior art, and the current (current) flows through the protrusion 25 of the current test terminal block 10 at the front side of the relay It is possible to simplify the current measuring operation and shorten the working time, thereby improving the current measuring workability.

In the embodiment of the present invention, since it is not necessary to measure the current through the CT terminal block as in the prior art, it is possible to prevent the current measurement error of the relay due to the disconnection of the control cable of the CT terminal and the operator's mistake or misunderstanding .

Further, in the embodiment of the present invention, in the voltage test terminal block 30, the voltage measuring pin TP is inserted into the voltage measuring hole 79 of the locking cover 70 and the voltage measuring pin TP is rotated Since the voltage can be measured by easily contacting the terminal 21, the workability of voltage measurement can be further improved.

2 and 4, the locking member 90 is separated from the compartments 51 of the case member 50 and the locking cover 70, and the locking cover 90 70 can be rotated downward and the open end 53 of the partitioning portions 51 of the case member 50 can be opened.

In this state, in the embodiment of the present invention, the rotation terminals 21 of the current test terminal blocks 10 and the voltage test terminal blocks 30 are rotated to the outside of the open end 53, (22b) can be electrically disconnected from the socket terminal (23).

Therefore, in the embodiment of the present invention, current and voltage can be applied through the current test terminal blocks 10 and the voltage test terminal blocks 30 to perform the test of the relay.

While the present invention has been described in connection with what is presently considered to be practical exemplary embodiments, it is to be understood that the invention is not limited to the disclosed embodiments, but, on the contrary, Other embodiments may easily be proposed by adding, changing, deleting, adding, etc., but this is also within the scope of the present invention.

10 ... Current test terminal block 21 ... Rotary terminal
22a ... terminal body 22b ... connection
22c ... handle 23 ... socket terminal
25 ... protrusion 27 ... clamp through hole
30 ... Voltage test terminal block 50 ... Case member
51 ... partition 53 ... open end
70 ... locking cover 71 ... supporting end
73 ... Hinge projection 75 ... Opening hole
77 ... guide groove 79 ... voltage measuring hole
90 ... locking member 91 ... locking rod
93 ... locking nut 95 ... head
97 ... screw thread 98 ... through hole
HT ... Hinge terminal TC ... Current measurement clamp
TP ... Voltage measurement pin

Claims (9)

(CTT) blocks that have three phase phase and neutral terminals in a 3-phase 4-wire line and electrically connect the CT and the relay, three-phase phase and neutral terminals, and a transformer And four voltage test terminal (PTT) blocks for electrically connecting the relay to the relay terminal,
And a case member integrally forming a plurality of compartments in which the current test terminal blocks and the voltage test terminal blocks are installed,
The current test terminal blocks and the voltage test terminal blocks are hinged to the respective compartments and are rotatably provided inside and outside the open ends of the compartments; And a socket terminal as a conductor selectively connected to the rotating terminal,
Wherein the rotation terminal of the current test terminal blocks integrally forms a protrusion protruding outside the open end of the partition in a state of being electrically connected to the socket terminal,
Wherein the protruding portion forms a clamp passage hole through which a current measuring clamp for measuring a current supplied to the relay from the current transformer can pass, with reference to an open end of the partitioning portion . The method according to claim 1,
Wherein the rotary terminal includes a terminal body and a connection portion protruding from the terminal body toward the socket terminal,
Wherein the protruding portion protrudes from the terminal body to the opposite side of the connection portion, and the clamp through hole is formed at an end of the protruding end. 3. The method of claim 2,
Wherein a locking cover for opening and closing the open end and locking and unlocking the rotary terminal is rotatably coupled to each of the partition portions of the case member through a hinge projection,
Wherein the locking cover is formed with an opening for exposing the protrusion to the outside of the open end of the partition. The method of claim 3,
The projection
Wherein the test terminal unit is provided so as to protrude through the opening hole of the locking cover with a vertical height difference with respect to the pair of current test terminal blocks. 5. The method of claim 4,
Wherein a semicircular guide groove for guiding a current measuring clamp is formed on a front surface of the locking cover with the opening hole interposed therebetween. 6. The method according to any one of claims 3 to 5,
Wherein the rotary terminal includes a handle portion of an insulating material provided at an upper end thereof,
A supporting end for supporting the handle is formed on an upper end of the locking cover,
Wherein the case member is provided with a locking member for locking the supporting end of the locking cover to each of the compartments. The method according to claim 6,
Wherein the locking member comprises:
A locking rod passing through the case member and the supporting end along an arrangement direction of the partition part and supporting one side surface of the case member as a head,
And a locking nut which is fastened to a through end portion of the locking rod passing through the other side surface of the case member
And a plurality of test terminals connected to the test terminals. 8. The method of claim 7,
And a through hole through which the locking rod passes is formed in the partition portion and the support end of the case member. 8. The method of claim 7,
Wherein a voltage measuring pin is fitted to the locking cover corresponding to the voltage test terminal blocks and a voltage measuring hole is formed to guide the voltage measuring pin to the rotation terminal.

Images