JPS5858477A - Collective insertion type test plug - Google Patents

Abstract

PURPOSE:To make a test plug for a horizontal case small-sized, by standing polariged plates straight on their thin side faces in width and arranging them orthogonally to base stands, and distributing and arranging terminals and knobs to every one face of the stands. CONSTITUTION:Polarized plates 25 are stood straight on their thin side faces in width and are arranged orthogonally to base stands 16 and 17 to shorten con- siderably the distance of the arrangement on one line of plates 25. The total number of terminals 21 and knobs 24 to be attached is cut into halves and are distributed and arranged to one faces of base stands 16 and 17 to reduce the total number of them to half. Relayside terminals are provided on the upper stand 17, and switchboardside terminals are provided on the lower stand 16, and these terminals are arranged zigzag in accordance with the order of the arrangement of plates 25. Thus, a collective insertion type test plug used for measurement and test of a horizontal case type relay is made small-sized.

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a mass-insertion test plug for use in measuring and testing internal components of horizontal case type protective relays.

Generally, the shape of the case of a draw-out relay is a vertical case type that is long in the vertical direction, and a horizontal case type that is long in the horizontal direction.

The horizontal case type is a recent model that uses printed cards as relays have become stationary.The printed cards are placed upright and arranged horizontally inside the case to improve heat dissipation and allow for multiple arrays. It was stored in! The shape of the case is long in the direction, and it is installed horizontally on the switchboard.

The vertical case type is a relay box that mainly contains mechanical elements and has a terminal device installed at the bottom or top of the relay.The case is long in the vertical direction and is installed vertically as a recessed type in the switchboard. It is.

Compared to the vertical case type, the horizontal case type allows the relay elements to be smaller in size due to the static design. In addition, by arranging them horizontally, multiple elements can be stored in one case, which has the advantage of greatly reducing the area occupied by the switchboard, making it convenient for larger protective relay devices. It is used according to the standard.

However, on the other hand, terminal devices equipped with test plugs that can be inserted all at once and are easy to handle during measurements and tests, such as those installed in vertical cases, require multi-pole test plugs, which will be explained later. Due to its large size, it is difficult to store it in a small horizontal case, so it is not installed, and as an alternative, the following rear connector is provided for measurements and tests.

The rear connector is fixedly attached to the back of the switchboard, and each terminal is connected to the power supply on the input side to reach the switchboard via the relay side.

The protective relay is inserted from the front of the switchboard, connected to the rear connector by on/off insertion, and locked and fixed to the switchboard side.

The unit test for the protective relay can be carried out by pulling out the protective relay from the switchboard.

Since the connections are concentrated on the rear connector in this way, it is natural that the measurement of the operating speed, voltage, current, etc. of the protective relay, as well as comprehensive tests, etc., will be performed using the rear connector on the back of the switchboard.

However, the wiring on the back of the switchboard is crowded and the space is small.
In addition, there are exposed live wires, and in tests where many instruments are brought in, it is difficult to be careful of the surroundings.In particular, if tools are left behind, or accidentally dropped, touching live wires can cause electrical damage. This is dangerous as it may cause a short circuit accident.

In addition, measurement and testing work using the rear connector requires attaching clips to the exposed terminals of the rear connector one by one and connecting them to the test equipment, which makes the work cumbersome and easy to touch the live wires with your fingertips, which can lead to electric shock. I'm worried.

By the way, plugs used in terminal devices are multi-pole integrated, and there are two types: test plugs used during testing and connection plugs that are always inserted when not testing, that is, while the device is operating.

In the case of connection plugs, by inserting the connection plugs all at once, the circuits on the switchboard side and the relay side are connected and operation is started. In the case of a test plug, the test equipment necessary for the test is connected to the test plug in advance, and when the test plug is inserted all at once into the terminal device, a multi-pole test can be performed simultaneously.

In this way, all plug operations can be performed from the front of the switchboard, making the operation easy and safe.Measurement and testing can be performed simultaneously on multiple poles, which is convenient.

Although it is attempted to install such a terminal device in a horizontal case, the present situation is such that the design of the terminal device is difficult to achieve as the number of terminals increases.

That is, since the test plug is connected to the test device, there are two lead-out terminals for branching the circuit to the relay side and the switchboard side for the l pole. In addition, since the tightening tool is easily lost and it is not desirable to bring it into the switchboard, it is required that the terminal be equipped with a knob that can be turned and tightened with the tip of a finger. If you can tighten it by turning it with your fingers, the size of the knob will be quite large. Furthermore, since the test plug has a structure in which multiple poles are arranged in parallel in a line, as the number of poles increases, the distance along the line becomes long. Furthermore, conditions that make miniaturization difficult, such as the need for a large number of parts such as terminals and knobs that occupy a large area, accumulate.

In particular, in a horizontal case with static pressure, a large number of elements are housed in one case, and the number of poles increases further.

For example, in a conventional protective relay device that consists of 8 elements in 8 vertical cases, if these elements are made stationary, 8 printed cards and 8x transformers can be used, and these can be stored in the horizontal case. In this case, the number of poles required for the test plug is at least close to 20. In addition, twice the number of terminals and knobs, 40 sets, are required.

Moreover, the area occupied by the terminal device in the horizontal case is a sill-shaped area. That is, since the printed cards are stored upright in the case with their widths aligned sequentially, it is desired that the terminal devices be narrow in width and can be stored adjacent to the printed cards. In this case, it is necessary to be able to store the printed card within the vertical height of the multi-pole test plug.

It is difficult to construct a test plug with the above-mentioned large number of electrode plates and twice as many terminals and knobs within such a restricted area, and as mentioned above, the terminal device is installed in the horizontal case. Instead, the rear connector was used instead.

This also applies to conventional vertical case type terminal devices, which pose a problem in dealing with a large number of electrode plates and a large number of terminals and knobs. An effective way to reduce the area occupied by commonly used terminals and knobs is to use parent-child knobs that place a pre-charge on top of the main current. This method attempts to reduce the number of knobs by half by stacking them three-dimensionally, thereby reducing the area occupied by the knobs on the base.

However, this method causes the operator to incur many inconveniences in the essential operation of handling the test plug.

The diameter of the tightening screw is different for both the parent and child.The child knob with a small screw diameter tightens well, but the parent knob with a large screw diameter is less effective and has less twist, so it tends to loosen.

Two types of connecting pieces, large and small, with different screw diameters are required for connecting the terminals, and it is troublesome to use them properly.

During testing, a so-called large chip is used at the tip of the lead wire that is connected to the test equipment.
Since a large chip may easily fall off due to loosening of the terminal portion, a terminal (connection piece) having a mounting hole without an opening is sometimes used for a long lead wire. When attaching this connecting piece, both the parent and child knobs must be removed before it can be inserted, and there are restrictions in connection, such as connecting the parent knob first, making it inconvenient to handle. In addition, the connecting piece of the main knob is large enough that even the slightest movement of the connecting piece can cause it to come into contact with the adjacent terminal, which is dangerous if it is not provided with insulation protection.

The test plug's electrode plates are arranged neatly in a row, so you can identify the circuit order at a glance, but the connection knob side has a three-dimensional parent-child knob that allows you to distinguish between the wiring side, the relay side, and the switchboard side.
The circuit order cannot be determined at a glance, and the wiring is based on symbols. However, the symbol is for the parent and child knobs stacked three-dimensionally, so even if you put a symbol on both, the parent knob's symbol will be hidden by the child knob and will not be visible from above, so it will be hidden in one place on the base where the knob is attached. There are two different symbols written together, and it is difficult to tell at a glance which symbol corresponds to the main knob. Further, after the wires are connected, the symbols are hidden behind the lead wires and become invisible, which is inconvenient when checking the wire connections.

On the other hand, as the number of electrode plates increases, the length of the array along a line becomes longer, so for reasons of strength, a method is often used in which the electrode plates are attached to an integrated base.

However, an elongated one-piece base may be deformed, such as warping, due to resin shrinkage or aging. If this occurs, the contact state between the electrode plate and the contact point becomes abnormal when the test plug is attached, which not only causes poor contact, but also prevents smooth attachment and detachment of the test plug.

It is also possible to reduce the width of the electrode plate in order to reduce the arrangement distance on the line, but this electrode plate is not only a FT circuit, but also a CT circuit that has elements that flow a large current when open. Therefore, the current capacity cannot be reduced too much, and
If the electrical insulation distance between the electrode plates is also large, it will not be possible to make any significant savings and the length will become longer. For this reason, the maximum number of poles of a test plug in a conventional vertical case is currently limited to 10 poles.

Therefore, if a larger number of pins is required, install the terminal device in two layers, 10 pins on the top of the vertical case and 10 pins on the bottom, and insert 1G pin test plugs into the top and bottom for testing. It was done as follows.

This invention has been made in view of the above-mentioned points, and its purpose is to arrange the electrode plates so that the narrow thickness direction of the electrode plates is upright and perpendicular to the base, and to reduce the arrangement distance on the - line of the electrode plates. By shortening the terminals and knobs by half and distributing them on one side of the base, the total number of terminals and knobs can be reduced by half. Therefore, it is an object of the present invention to provide an easy-to-handle, all-in-one test plug that allows measurements and tests to be easily and safely performed from the front of a switchboard.

Another object of the present invention is to enable unit testing of the protective relay from the front of the switchboard without pulling out the protective relay.
Equipped with a large number of electrode plates so that multi-pole measurements and tests can be performed at one time, easy and reliable connection of lead wires, and terminals that are easy to identify, and prevents warping of the base. It is an object of the present invention to provide a test plug that can be inserted all at once, and is provided with an independent electrode plate that allows smooth insertion and removal operations without being affected.

In the batch insertion type test plug according to the present invention, each terminal has the same knob, and the terminals are divided and arranged on both sides of the base, and the terminals on one side are divided into the relay side and the other side is divided into the switchboard side. , one terminal has a symbol, etc., and this will be explained below with reference to illustrated embodiments.

Figure 1 is a front view of a horizontal case type protective relay, (1)
is a horizontal case, (2) is an internal element of a stationary protective relay, (3) is a terminal device in which a test plug representing an embodiment of the present invention is used, and (4) is the above terminal device m (3). This is the plug insertion hole provided in the.

Figure 2 is a cross-sectional view along the line ■-■ in Figure 1, showing the state in which the test plug is inserted. (5) is the upper terminal block made of synthetic resin, and (6) is the upper terminal block (5). and the upper terminal block divided into upper and lower symmetrical shapes, (7) is the upper terminal block (5) above.
The power supply on the input side is connected to the brass plate fixed to the external terminal υ. (8) is an external terminal fixed to the upper terminal block (6) and connected to the protective relay element side. Contacts (9) made of phosphor bronze plates each having a free end are firmly fixed to these external terminals (7) and (8) by screws 00. αυ is an auxiliary spring that pushes up the contact (9), (2) is a locking base that restricts the movement of the free end of the contact (9), (to) is a front plate made of an insulating plate, and αΦ is an outer frame that can be used up and down. Wrap the outer periphery of the upper terminal block (5), the terminal block (6), and the front plate (2), which are divided into
) is configured.

FIG. 8 is a front view of a test plug showing an embodiment of this invention, and FIG. 4 is a cross-sectional view taken along line WR/ in FIG. 8, showing a state in which the base is disassembled vertically.

a! 9 is a test plug showing an example of this invention.
0η is a lower base made of elastic synthetic resin, 0η is an upper base made of the same material and is symmetrical to the lower base αQ, and both are divided into upper and lower parts, leaving a thin wall on the outer periphery of each υ, and an inner surface. is said to be hollow. (G) is a tote that the operator grasps when operating the test plug α-yen, (a) is a notch groove that engages with the outer periphery of the electrode plate, which will be described later, and (e) is a tightening seat.

Vυ is a terminal such as a stepped bolt that is inserted into the tightening seat, and the stepped part engages with the hexagonal outer periphery of the tightening seat to prevent left and right rotation, and the washer (2 ) is in contact with the tightening bolt described in (h) and is prevented from coming out. (E) is attached to the washer above)
Tighten the above terminal cl of the lead wire, which will be described later, using the tightening screw. Also serves as a connection to η. (c) is a knob made of synthetic resin with a knurled outer periphery, and a metal piece having a threaded portion to be screwed into the terminal I2υ is embedded during molding.

(To) is the above-mentioned electrode plate molded from synthetic resin, so conductive plates (E) and (F) with partially exposed thick parts on the top and bottom are embedded and integrated during molding. 2) has a protrusion on one side and a hole in which the protrusion engages on a part of the side so that when the independent electrode plates (to) are arranged in parallel on the - line, they fit into each other between adjacent plates. They are provided so that they fit into each other and are connected in an orderly manner. 4 is a bulkhead plate, and 4 is a flexible lead wire as described above to make it bendable, and the conductive plate (E) is connected to the terminal EP group attached to the lower base QQ side On the other hand, the conductive plates (b) of group 1) are connected to the terminals on the side of the upper base αη in accordance with the arrangement order of the electrode plates. cl is on the above-mentioned electrode plate) Each of the above-mentioned terminals is labeled with a symbol indicating the arrangement order in numbers for each terminal.
are displayed close together.

) is a circuit name plate showing the destination of the circuits on the switchboard side and the relay side, and the group of terminals 31) installed on the lower base QQ side are installed on the switchboard side, while on the other hand, the terminals 31) are installed on the upper base αη side. The group of terminals Q is displayed separately from the relay side. (2) Insert the electrode plate (7) into the notch Ql of the lower base α and the upper base αη from the state shown in Fig. 4 using screws, bring the top and bottom into close contact, and tighten firmly with the nut (3). The electrode plate (2) is fixed and integrated.

By inserting the test plug Of9 into the terminal device (3), the electrical path of the test plug (G) configured in this way is such that the input side power is connected to the external terminal (7).
Contact (9) - the conductive plate (E) of the electrode plate (to) - the lead wire (7) - the terminal 6 of the lower base Q119!
connected to p. On the other hand, to the output side, the terminal Q of the upper base Q71) - the lead wire (7) - the electrode plate (2)
The conductive plate wire - the contact point (9) - connects to the external terminal (8). That is, the terminal (c) on the lower base tm side.
The power supply on the input side is connected to the terminal (b) on the upper base ([?) side to the output side. Therefore, when a test device is connected between the terminals eAI, an electrical path is formed via the test device.

In addition, the terminals (goods) of the lower base αQ and the terminals (c) of the upper base (17) are connected from the right side in accordance with the arrangement order of the electrode plates (to) as shown in FIG. 2 above. The symbol label 0D, which indicates the arrangement order by numbers, is attached to both the lower base α and the upper base αη, and the circuit drawers are identified so that they can be connected by combining the same symbols. In addition, the circuit name plate (2) is attached so that the destination of the circuit can be known when the circuit is pulled out, and the terminal (2) group of the lower base α is connected to the switchboard side, and the terminal (H) of the upper base Qη is attached to the terminal (2) group of the lower base α. ) group is displayed separately from the relay side.

FIG. 6 is a plan view of a connecting piece that connects terminals. ■ is a connection piece. (7) is a flexible and bendable lead wire, (
B) is a terminal piece with a hole that can be inserted into the terminal 1 above,
The above lead wires are crimped at both ends.

To install the connecting piece (to), remove the knob @, insert the terminal piece (b) of the connecting piece (to) into the terminal (b), and tighten firmly. Note that the screw of the terminal I2η is a fine thread and has a long axial length, so it can be tightened firmly. In addition, for connections between different poles or between the same poles to short-circuit a circuit, the lead wire (to) of the connection piece (to) must be long enough to be used by both. (to the connecting piece). Note that the connection of the same polarity is between the lower base Qfe and the upper base α.
The lead wire (to the above lead wire) should be bent to cross between η, and in that case, the passage should be through both sides of the test plug (to) and the space (to) adjacent to the above tote (to). Both are connected via the closest passage.

The above test plugs (to) are connected in advance to the measuring instruments and test equipment, and other circuits that are not connected are inserted all at once after being short-circuited or connected between the same polarities so as not to interfere with operation. It is possible to test the poles at the same time, and in the illustrated example, it is possible to test the 2o poles at the same time.

Further, when not testing, a connecting plug such as a conductive plate is inserted into the one-person portion (not shown) to connect the external terminal (7) and the external terminal (8) to operate the device.

The batch-insertion type test plug according to the present invention is constructed as described above, and the above-mentioned knobs are arranged on the above-mentioned electrode plate).
Since they are arranged sequentially from the right in a staggered manner according to the circuit order of In comparison, it is easy to identify the points arranged under the extension line drawn from the above-mentioned electrode plate (to).

This allows you to distinguish the relationship between the two, such as which knobs are connected to the plurality of pole plates, and connect them to the relay side and switchboard side. It is also clear that the lower base α side is the switchboard side, and the upper base α side is the relay side.

Moreover, the terminal symbol is one symbol for one terminal.
Compared to the conventional terminal symbol display for parent and child terminals in which two symbols are written together, it is easier to read and convenient for wiring and checking.

In addition, the above knobs are all uniform in size, are arranged in an alternating staggered pattern, and have small thread diameters, allowing for good tightening. In particular, the thread diameter of the terminal e1 is a fine thread, which is less likely to loosen after tightening compared to a coarse thread. In addition, by unifying the screw diameter, the terminal piece (b) and the connecting piece (which is used as the lead wire (to) which can be used for both shorting between different poles and connecting between the same poles) can be made into one type. In addition to improved workability, there are also advantages in terms of manufacturing.

- When testing blade protection relays, it is not necessary to use long lead wires, such as those installed on the top of the switchboard, and in that case, terminals other than large chips may be used as connection pieces. However, for any terminal, it is only necessary to remove one of the knobs and screw them together again, so the hassle of having to remove two knobs like parent-child knobs is eliminated. Moreover, even if the connection piece (to) without insulation protection is attached to the terminal (2), the intervals between the terminals (2) are arranged in a staggered manner and are wide, and in addition, the knob (
c) After tightening, the terminal pieces are hidden and protected by the outer periphery of the knob, so contact between adjacent bare connecting pieces is reliably prevented, and handling is safe. In addition, the knob (C) is easy to pick with your fingers because it is a single knob and has a wider pitch than the parent and child knobs.

In addition, the above electrode plate □□□ is made by standing the conductive plate (E) and the bottom upright in the direction of the thinner wall thickness, and embedding and integrating them during synthetic resin molding, so that when arranged, the width becomes thinner. ing. In addition, the distance required for electrical disconnection between the electrode plates □□□ is assumed to be independent, so the creepage distance must be determined by providing a small space between the plates. When a large number (20 poles in the figure) of the above-mentioned electrode plates are arranged as shown in Fig. 8, the arrangement distance along a line can be greatly shortened, and the horizontal case can be sufficiently insulated. It is possible to construct a compact multi-pole structure that can be stored in

Conventionally, conductive plates were attached to a one-piece synthetic resin base, which required a large space because the width of the electrode plates was wide and the creepage distance required for insulation between the plates was small. Due to the long array distance, it was considered difficult to produce a compact multi-pole structure that could be stored in a horizontal case, so it was not possible to manufacture it.

In addition, conventional one-piece synthetic resin bases can become distorted and deformed due to shrinkage of the resin or deterioration over time, resulting in poor contact between the electrode plate and the contact points, and test plug installation. There was an arrangement that made it impossible to remove it smoothly. The above-mentioned electrode plates) are independent and have a narrow width and are made of resin with low shrinkage, so there is no worry about distortion due to shrinkage, and the above-mentioned connecting parts (to) are individually provided so that they fit into each other. The lower base af1 and the lower base Qη that support these are made of elastic synthetic resin and have a hollow inner surface to prevent resin contraction. Even if distortion occurs due to the action, the inner surface, which has no flesh, will not warp even though it may warp toward the outer surface. From this state, the above-mentioned electrode plates 4 are respectively engaged with the above-mentioned notched grooves. Then, when the screws (3) are tightened firmly, since the wall thickness is thin and the resin is elastic, the outward warping distortion is mutually corrected and integrated as the screws are tightened. The lower base αQ and the lower base Q71 integrated in this way repel each other outward with equal force and are always held in line, and in addition, the connecting portion (7) Since they are fitted together and held in line, the linear shape in which the multi-poles are arranged will not curve even when the resin shrinks. Further, since the contact point (9) is brought into contact with the conductive plate (E) and the thinner part at the bottom, the resistance is lower than that of the conventional surface contact of a wide electrode plate, and smooth operation can be achieved.

In addition, the terminal Qya and the knob to4 are connected to the lower base (
1 and the lower base αη, respectively, so that the area occupied on the base is halved. Conventionally, they were arranged on a base on one side, which limited the number of pieces that could be installed, and the attempt was made to save space by stacking them three-dimensionally like the Ikioi parent-child knobs.

Since the multi-pole is miniaturized in this way, it can be housed in the horizontal case (1) as shown in Figure 1 above, and can be accessed from the panel surface as shown in Figure 2 above without having to pull out the protective relay as in the conventional case. Since the test can be performed by inserting the test plug aυ into the test plug, the time required for pulling it out can be omitted. In addition, there is no need to attach scissors to one lip on the rear connector as in the conventional method, and multi-pole tests can be performed simultaneously by inserting the test plug α0 connected to the test device in advance. is simple and safe.

In addition, this test plug (to) can be used for vertical cases, and it is convenient because multi-pole tests can be performed with one set instead of the conventional two sets of 1O poles. This has the effect of reducing the occupied area.

[Brief explanation of the drawing]

FIG. 1 is a front view of a horizontal case type protective relay, and FIG. 2 is a cross-sectional view taken along the line 1--1 in FIG. 1, showing a state in which a test plug is inserted. FIG. 8 is a front view of a test plug showing an embodiment of the present invention, FIG. 4 is a cross-sectional view taken along line W--W in FIG. 8, and FIG. 6 is a plan view of a connecting piece that connects terminals. . In the figure, (3) is the terminal device, (4) is the plug insertion slot, (G) is the test plug, α0 is the lower base, αη is the lower base, α is the notch groove, (2) is the terminal, is the knob, (to) is the electrode plate, (e) @ is the conductive plate, (to) is the connection hole, and (to) is the connection piece. Note that the same reference numerals in the figures indicate the same or corresponding parts. Agent Makoto Kuzuno - 1st + 4 2nd Ward Z, f 3rd Knee 4th 'l: M

Claims (1)

[Claims] An independent electrode plate made by standing upright the thick part of a conductive board and embedding it in synthetic resin, a connecting part in which a plurality of these electrode plates are stacked and arranged in a line, and this connected electrode plate, An upper base whose inner surface is hollow and is made of elastic synthetic resin, a lower base that engages and clamps the above-mentioned electrode plate together with the upper base, and the upper base is attached to the upper and lower bases on the relay side. , with the lower base facing the switchboard, a group of terminals arranged in a staggered manner according to the arrangement order of the electrode plates, a knob screwed to the terminal group, and a connecting piece bendably connected to the knob. Bulk insertion type test plug with.