JP6324729B2 - Uninterruptible bypass tool for electricity meter - Google Patents

Description

  The present invention is used to replace a watt hour meter in an uninterruptible state by attaching it to a terminal block on the wire connection side of a watt hour meter that measures the amount of power used, forming a bypass circuit in the input / output wire circuit It is a bypass tool.

  Conventionally, the amount of electric power used in ordinary households and various offices is measured by the watt hour meter installed individually for each house and each office, and the electricity charges are based on the measured data. Is paid to the power company. Accordingly, since the watt hour meter must be capable of always accurately measuring without malfunction, the watt hour meter is replaced with a new one when it is used for a certain period of time, for example, a use cycle of about 10 years.

  However, if a power failure occurs temporarily or for a short time during this periodic replacement or repair work, it may affect network communication operations using a personal computer, etc., or affect various time-set devices. This is not a small thing, and will cause great inconvenience for the power user.

  Therefore, as a technology that makes it possible to fundamentally solve these problems, there is no need to remove or reconnect the wires to the I / O terminals for connecting wires in the watt hour meter, and there is no danger of handling live wires. It is possible to carry out uninterruptible replacement work and uninterruptible repair work of a watt-hour meter in a very short time while maintaining an uninterrupted state without causing a power outage for a short time or instantaneously. Technology has been proposed and published.

JP 2009-150753 A JP 2006-170787 A

  These prior arts bypass each terminal of the I / O cable circuit exposed by removing the hazard prevention cover that covers the surface of the terminal block provided on the wire connection side of the watt-hour meter that measures power consumption. This is a technology that enables the watt-hour meter to be replaced or replaced in an uninterruptible state by directly applying a tool to form a bypass circuit.

  When compared with the conventional technology, these prior arts have no danger of hot-line handling and maintain the uninterruptible state while maintaining the watt-hour meter uninterruptible and uninterruptible repairs very quickly. Is a technology with significant advantages that can be performed. However, these prior arts attach and detach the bypass tool to and from the terminal block of the watt hour meter to form the bypass circuit by aligning the mounting screws and tightening the screws, and loosening the tightening screws. In particular, it requires a screw alignment work during installation work, and the screw tightening work after this alignment requires time and effort. It was.

  Thus, the present invention enables one-touch operation to attach and remove a tool to / from the terminal block of the watt hour meter, and press contact of the contact pin to each terminal constituting the terminal block of the watt hour meter. The purpose is to provide an uninterruptible bypass tool for watt-hour meters that allows the formation of a bypass circuit to be carried out extremely quickly and reliably by a substantially two-touch operation. Is. Furthermore, the present invention can be attached to the terminal block of the watt hour meter only by operating the lever, and does not give load to the watt hour meter, and does not give load to construction materials such as the watt hour meter mounting bracket. An uninterruptible bypass tool for metering is provided.

The uninterruptible bypass tool for a watt-hour meter according to claim 1 according to the present invention, which is provided to achieve the object, comprises a terminal block B having a plurality of input system terminals a and output system terminals b. A tool for uninterruptible work using the watt-hour meter A as a target, and a plurality of conductive plates 4, 5 accommodated in a non-contact state in a horizontally long container body 1 having an insulating structure. A plurality of contact pins 8 are connected to the conductive plates 4 and 5 at the upper end side, and the pin contact 9 at the lower end protrudes or can be protruded below the container body 1, and each of these contact pins 8 is connected to the container body. A plurality of compression springs 10 that are always pressed toward the lower side of the container 1 are arranged, and fixed guides 12 and 12 provided at both ends in the longitudinal direction of the container body 1 are arranged along the longitudinal direction of the container body 1. One end 31 is accommodated via the lever fixing pins 15 and 15 provided. A lock lever pin horizontally disposed on a fixed guide formed separately on the fixed guides 12 and 12 by connecting the case fixed levers 3 and 3 having a locking projection 33 protruding toward the center of the main body 1 so as to be swingable. The lock levers 13 and 13 having the container main body pressure contact portion 13a that swings downward and presses and moves the container main body 1 are connected to be able to swing up and down.

According to the second aspect of the present invention , the case fixing levers 3, 3 of the watt-hour meter uninterruptible bypass tool according to the first aspect are arranged at one end 31 by lever springs 20, 20 attached to the lever fixing pins 15, 15. , 31 is always provided with elasticity so that the side of the container 31 is directed toward the center of the container body 1.

According to the third aspect of the present invention , the lock levers 13 and 13 of the watt-hour meter uninterruptible bypass tool according to the first or second aspect of the invention are configured so that the lock lever pins 16 and 16 are The structure is provided with stoppers 13b and 13b that move so as to protrude to the outside of the position and limit the swing movement of the case fixing lever 3 in the unlocking direction.

According to a fourth aspect of the present invention , the lock levers 13 and 13 in the uninterruptible bypass tool for watt-hour meters according to any one of the first to third aspects are freely rotatable on the container main body pressure contact portion 13 a of the lock lever 13. The lock rollers 18 and 18 are mounted on the shaft, and the lock rollers 18 and 18 come into contact with the container main body 1 to be pressed down.

Arrangement according to claim 5, claim 1 to case fixing lever 3,3 in uninterruptible bypass tool WHM according to any one of 4, one end portion 31 locking projection 33 which is formed on those of a length D along the longitudinal direction of the container body 1, has a structure that is formed larger than the width d of the power meter a terminal block B in the formed wire connection operation recess c It is.

The configuration according to claim 6 is the lower surface of the locking projection 33 formed at one end 31 of the case fixing lever 3, 3 in the uninterruptible bypass tool for watt hour meter according to any one of claims 1 to 5. Reference numeral 36 denotes a structure formed on an inclined surface that rises toward the center in the longitudinal direction of the container body 1.

  As described above, the uninterruptible bypass tool for watt-hour meters according to the present invention has the lever fixing pins 15 and 15 provided in the container block 1 having the required structure inside or the terminal block B portion of the watt-hour meter A. The case fixing levers 3 and 3 having the locking projections 33 at one end 31 are connected to each other through a pivot, and the case fixing levers 3 and 3 are always elastically directed in a predetermined direction by lever springs 20 and 20. Since the structure is provided, one end portion of the case fixing lever 3 is operated by attaching the container body 1 to the terminal block B and pressing it when attaching the tool to the terminal block B of the watt-hour meter A. The locking protrusion 33 formed on the 31 is replaced with the locking protrusion 3 formed on the container body 1 or the terminal block B portion. It can be attached by one-touch operation by engaging with the engagement part, and can be removed by releasing the engagement of the locking projection 33 by swinging the case fixing levers 3 and 3 in the removal work. The formation of the bypass circuit of the meter A can be expected to have a remarkable effect that it can be performed extremely quickly and reliably by a one-touch operation.

Further, as a more specific configuration, as in the configuration according to claim 1 , the size of the container body 1 is set to the longitudinal direction of the container body 1 having a horizontally long shape corresponding to the watt-hour meter A to be used. Case fixing levers 3, 3 each having a locking projection 33 protruding toward the center of the container body 1 at one end 31 are connected to both ends so as to be swingable. 3 is a container main body press-contact which moves the container main body 1 downward and swings with the lock lever pins 16 and 16 horizontally provided on the fixed guides 12 and 12 separately formed on the fixed guides 12 and 12 pivotably pivoted. Since the lock levers 13 and 13 having the portion 13a are connected so as to swing up and down, the attachment of the bypass tool to the terminal block B of the watt-hour meter A is performed at both ends of the container body 1. In It is pressed against the terminal block B while opening one end 31 of the case fixing lever 3, 3, or formed on the lower surface 36 of the locking projection 33 provided on the one end 31 of the case fixing lever 3, 3. The lock lever 13 can be attached by a substantially one-touch operation of pressing against the terminal block B using an inclined surface. In this state, the lock lever 13 is connected to the upper surface of the container body 1 so as to be swingable. The contact pin 8 is brought into pressure contact with each terminal of the watt-hour meter A by a one-touch operation of pressing 13 and lowering the container body 1 by the press contact portion 13a. Therefore, there is a remarkable effect that the formation of the bypass circuit can be performed extremely quickly and surely by a two-touch operation. Furthermore, since the bypass tool according to the present invention can be mounted without applying a load to the watt hour meter only by operating the lever, the construction material such as a support fitting for mounting the watt hour meter is not loaded. It has the remarkable effect that it can be used in.

  In this way, since the formation of the bypass circuit can be formed by a substantially two-touch operation, the worker can immediately remove the watt-hour meter body from the base and replace it with a new one, or immediately replace it with another repaired product. It has the great advantage that it can be started and the replacement work of the watt-hour meter main body can be started almost instantaneously as compared with the conventional equipment. Needless to say, after the replacement of the watt hour meter body, the lock levers 13 and 13 are loosened to release the bypass circuit, and the container main body 1 is removed by releasing the engagement of the end portions 31 of the case fixing levers 3 and 3. Then, it is only necessary to attach a danger prevention cover to the surface of the terminal block B to recover the original state.

  By using the bypass tool of the present invention, an operator can touch the input / output wires directly, eliminates the danger of a short circuit accident, and further keeps energized and uninterrupted, extremely easily and quickly. In addition, there is a remarkable effect that exchange work and repair work of the watt hour meter can be completed in a short time.

In carrying out the present invention, as in claim 2 , the case fixing levers 3, 3 are connected to the lever fixing pins 15, 15 by lever springs 20, 20, and the one end portions 31, 31 side to the center side of the container body 1. By making the structure always elastic so as to face, it is easy to insert the locking projections 33 and 33 into the mounting recess Bd of the watt-hour meter A, and once enter the recess Bd. Since the locking protrusions 33 and 33 do not come out unless an external force is applied in the required direction, the posture of the case fixing levers 3 and 3 can be stabilized.

According to a third aspect of the present invention , the lock levers 13 and 13 of the bypass tool move so as to protrude outside the positions of the lock lever pins 16 and 16 in accordance with the lock operation of the lock lever 13, and the case fixing lever If the stoppers 13b and 13b for restricting the swing movement of the motors 3 and 3 in the unlocking direction are provided, the case fixing levers 3 and 3 are not released by an unexpected external force. Work such as replacement of A can be performed with peace of mind.

According to a fourth aspect of the present invention , the lock levers 13 and 13 in the bypass tool are provided with lock rollers 18 and 18 rotatably mounted on the container main body pressure contact portion 13a of the lock lever 13, If the rollers 18 and 18 are configured so as to be pressed down while being in contact with the container body 1, the operation of the lock levers 13 and 13 has little resistance and can be operated lightly.

As described in claim 5, the case fixing lever 3,3 in the bypass tool, the length D along the longitudinal direction of the container body 1 of the locking projection 33 is formed on one end portion 31, the electric energy By attaching the bypass tool to the terminal block B in the watt-hour meter A by making the structure larger than the lateral width d of the recessed portion c for wire connection operation formed in the terminal block B of the meter A At this time, since the one end 31 of the case fixing levers 3 and 3 does not fall into the recessed portion c for electric wire connection operation of the terminal block B, only the case fixing levers 3 and 3 are formed of an insulator. Even if it is made of metal, it is possible to prevent the occurrence of a short circuit accident without requiring a special safety device and to use it safely.

As described in claim 6 , the lower surface 36 of the locking projection 33 formed on the one end portion 31 of the case fixing lever 3, 3 in the bypass tool is inclined upward toward the longitudinal center of the container body 1. If the tool is formed to be a flat surface, when attaching the tool to the terminal block B, just push the tool against the terminal block B and push it in so that the one end 31 of the case fixing lever 3 follows the inclined surface. Thus, the tool can be automatically opened and attached, and the attachment of the tool to the terminal block B can be completed more easily and instantaneously.

The front view which shows the whole watt-hour meter. The partial longitudinal cross-sectional side view of FIG. The perspective view which shows the external appearance shape of the bypass tool of this invention. The top view of the lower half which comprises a container main body. The bottom view of FIG. The front view of a container main body. The top view of FIG. The partial longitudinal section front view explaining the attachment state to a watt-hour meter. The front view of the container main body which shows the fixed state to a watt-hour meter. The top view of FIG. The fragmentary longitudinal cross-section front view explaining the fixed state to a watt-hour meter. The front view which shows the whole watt-hour meter of 2nd Example. The partially notched front view which shows the state just before attachment of the container main body of 2nd Example. Explanatory drawing which shows the attachment state of the container main body of 2nd Example. The front view which shows the whole watt-hour meter of 3rd Example. The side view of FIG. The top view of the container main body of 3rd Example. The partially cutaway side view of FIG.

  A first embodiment of the present invention will be described below with reference to the drawings. 1 and 2 show a typical watt-hour meter as an example of a usage target of the uninterruptible bypass tool for a watt-hour meter according to the present invention. The watt-hour meter A is configured such that a terminal block B is connected to the lower side of the box-type watt-hour meter A when attached to the wall surface.

  As shown in the front view of FIG. 1, the watt-hour meter A in this embodiment has two external line input system terminals a and a arranged on the left side and two internal line output system terminals b and b arranged in parallel on the right side. Terminal block B. Needless to say, in the case of a three-phase watt-hour meter, three terminals a and b addressed to the left and right are formed. The left and right portions of the terminal block B are provided with metal fittings having mounting holes h and h for screwing a danger prevention cover (not shown) covering the upper surface portions of these terminal groups. The danger prevention cover is screwed and fixed using the holes h and h. However, in FIG. 1, the state which removed the danger prevention cover which covers an upper surface is shown.

  Next, an example of the bypass tool according to the present invention will be described. FIG. 3 is a view showing the external shape of the bypass tool of the present invention from the upper side on the back side. Inside the tool, as shown in the plan view of FIG. 4, a first conductive plate 4 serving as a bypass metal fitting having a substantially U-shaped planar shape and a space of the U-shaped portion. The second conductive plate 5 and the second conductive plate 5 which are arranged in a non-contact state with each other and are substantially linear are incorporated.

  As shown in FIG. 4, these bypass fittings (conductive plates) 4 and 5 are formed with two connection holes 4 h and 5 h in the vicinity of both ends, and these connection holes 4 h and 5 h have four connection holes. The upper part of the contact pin 8 is inserted and fastened with a nut 24 to be connected, and a compression spring 10 is interposed on the upper part of the contact pin 8 so as to be always elastically pressed downward (see FIG. 8). .

  These contact pins 8, 8 are arranged so that the respective lower portions always protrude toward the lower surface side of the container body 1, as seen in the bottom view of FIG. 5 and the front view of FIG. Each lower end surface portion is used as a pin contact 9 with good electrical conductivity. Also, two installation state confirmation pins 7 and 7 are provided near the left and right ends of the container body 1. Each of these installation state confirmation pins 7 and 7 is also arranged and formed so that the lower end portion always protrudes toward the lower surface side of the container body 1.

  The contact pins 8 and 8 fixed to the conductive plates 4 and 5 as the bypass metal fittings are in contact with the two terminals a on the input side of the watt-hour meter A shown in FIG. The two right-hand sides are arranged so as to contact the terminal b on the output side.

  Thus, the left and right end portions of the container body 1 are provided with a fixed guide 12 having a U-shaped side surface indicated by reference numeral 12 on the left and right sides of FIG. In this state, the case fixing levers 3 and 3 are arranged in the vertical direction of the case fixing levers 3 and 3 via the lever fixing pins 15 and 15 which are arranged along the front and rear width direction of the container main body 1 and are laterally provided in the pin holes 12h formed near the lower part. The substantially intermediate part 34 is connected so as to be swingable. The case fixing levers 3 and 3 are provided with a locking projection 33 protruding toward the center side of the container body 1 at one end 31 of the lever lower part 32, and the lever upper part 35 is located on the outer side in the left-right direction of the container body 1. Elasticity is imparted by a lever spring 20 in a direction that is always open.

  Further, as shown in FIGS. 7 and 8, the vicinity of the upper ends of the fixed guides 12 and 12 protrudes to the upper surface side of the container body 1, and another pin is provided on the opposing walls 120 and 120 of the protruding portions. Holes 121 and 121 are formed, and the lock lever pins 16 and 16 are provided laterally in the pin holes 121 and the pin holes 16h formed in the rearward protruding walls 13c and 13c of the lock lever 13 to form a swing shaft. 1, lock levers 13 and 13 are connected so as to be able to swing up and down. Each of the lock levers 13 and 13 has a side wall that swings with the lock lever pins 16 and 16 serving as a swing shaft, and is provided with a container body pressure contact portion 13a that presses and lowers the container body 1 at one end thereof.

  As shown in the embodiment, the structure of the lock levers 13 and 13 is a structure that swings up and down, and except for the mounting operation to the watt hour meter A, the standing posture shown in FIGS. If the posture is changed to the lying posture shown in FIGS. 9 to 11 during the mounting operation to the watt-hour meter A, the watt-hour meter can be made to have a low bulk without protrusions when the watt-hour meter is replaced. Sometimes it can be used without getting in the way.

  As shown in FIGS. 7, 8, 10, and 11, the lock levers 13 and 13 shown in the embodiment are attached to the portion toward the outside in the longitudinal direction of the container body 1 in accordance with the locking operation of the lock lever 13. The stopper 13b is formed on the side wall so as to protrude outward from the position of the lock lever pin 16 and restrict the swing movement of the lock lever 13 in the unlocking direction. In these drawings, the stopper 13b is shown as being formed on only one of the upper and lower side walls in FIG. 7. Needless to say, the stopper 13b is formed on both side walls. There may be.

  Further, as shown in FIG. 11, the case fixing lever 3 shown in the embodiment has a length along the longitudinal direction in the container body 1 of the lock projection 33 formed at one end 31 thereof. If the width D is formed larger than the lateral width d of the recessed portion c for wire connection operation formed in the terminal block B of the watt-hour meter A, the case fixing lever 3 is made of metal. However, it is possible to avoid a drop into the recessed portion c for wire connection operation, and to prevent an unexpected short circuit accident. Furthermore, when the lower surface 36 of the locking projection 33 is formed as an inclined surface that rises toward the center in the longitudinal direction of the container body 1 as shown in FIG. 8, the case fixing lever 3 is connected to the terminal block. It is preferable in that it can be easily fitted into the recesses Bd formed on both sides of B and the container body 1 can be easily attached. The shape of the lower surface 36 may be linear or convex.

  12 to 14 are diagrams for explaining the second embodiment. The attachment means of the container main body 1 shown in the embodiment has a structure in which a case fixing lever 3 for fixing the container main body 1 is mounted on the terminal block B side of the watt-hour meter A.

  As shown in FIG. 13, the case fixing lever 3 has a lever upper portion 322 protruding above the terminal block B at both ends in the left-right direction of the terminal block B of the watt-hour meter A, and the lower end portion 321 of the case fixing lever 3 The upper portion 322 is attached to the fixed pin 15 so as to be swingable, and the upper portion 322 is always pressed toward the center of the terminal block B by the lever spring 20.

  Thus, the case fixing lever 3 shown in the embodiment is formed with a projecting curved surface 323 in which the surface toward the center side of the terminal block B of the upper portion 322 extends to the left and right outwards upward. As a curved surface that guides the container body 1 toward the lower locking projection 33 while moving to the outside against the elastic force of the lever spring 20 while in contact with the longitudinal side surface of the container body 1 when mounted on B. is there.

  The case fixing lever 3 is provided with a wall surface 324 in the front-rear direction in plan view below the locking projection 33 so as to restrict the position of the container body 1 in the front-rear direction and prevent movement.

  15 to 18 are diagrams for explaining the third embodiment. In this embodiment, as a means for mounting the container main body 1, the container body mounting protrusions 330 are formed on the left and right sides of the terminal block B in the watt-hour meter A, and the protrusion 330 is connected to the terminal block B. The container body 1 has a mounting portion 331 formed in contact with the outer side, and a flange 332 for positioning and movement prevention formed on the outer side. In addition, in order to facilitate the mounting of the container body 1, an edge portion 333 having an arc shape in a side view is provided in the vertical direction of the mounting portion 331.

  The container main body 1 shown in the embodiment has a case fixing lever 3 for fixing the container main body 1 formed at a corresponding position of the projecting body 330 of the terminal block B in the watt-hour meter A. That is, the container body 1 has a structure including protrusions 334 and 334 partially protruding on both sides in the longitudinal direction, and before and after the protrusion 334, as shown in the first embodiment as shown in FIG. The same case fixing levers 3 and 3 are formed, and the protruding body 330 is mounted so as to be held from above and below. Other configurations are the same as those in the first embodiment.

  The case fixing lever 3 shown in the third embodiment and the protrusion 330 engaged with the fixing lever 3 are attached to the terminal block B side of the watt-hour meter A, contrary to the embodiment. The protrusion 330 may be formed on the container body 1 side.

  As described in the above embodiment, the container body 1 in the bypass tool is preferably made of a transparent material so that the inside of the container body 1 can be seen through from the outside. However, it is not always necessary to be formed of a transparent body, and it is possible to form the whole with an opaque material, or to implement a part in an opaque state.

  The installation state confirmation pin 7 described in the above embodiment is constantly pressurized toward the lower surface side of the container body 1 by a coil spring (not shown). When the container body 1 is not used, as shown in FIG. The lower end of the container body 1 protrudes from the lower surface side. As shown in FIG. 11, the installation state confirmation pin 7 swings the case fixing lever 3 during the attachment work to the watt hour meter A to press the container body 1 against the terminal block B of the watt hour meter A. And the upper part protrudes above the container main body 1 against the pressure of a coil spring. The installation state confirmation pin 7 protruding to the upper surface side of the container body 1 has an advantage that it can be confirmed not only by visual confirmation but also by contact with a fingertip.

  Although the embodiment considered to be representative of the present invention has been described above, the present invention is not limited to the structure described above, and includes the constituent features according to the present invention. The above-mentioned purpose can be achieved and can be implemented with appropriate modifications within the range having effects.

  The uninterruptible bypass tool for watt-hour meters referred to in the present invention uses the terminal block for fixing the input / output wires provided in the watt-hour meter to form a bypass circuit by mounting it almost instantaneously. The power meter can be replaced or repaired at the same time, and it can be removed from the watt hour meter almost instantly. The possibility of being used is great.

DESCRIPTION OF SYMBOLS 1 Container body 3 Case fixing lever 31 One end 33 Lock protrusion 4,5 Conductive plate 8 Contact pin 9 Pin contact 10 Compression spring 12 Fixing guide 13 Lock lever 13a Container body press-contact part 13b Stopper 15 Lever fixing pin 16 Lock lever pin 18 Lock roller 20 Lever spring A Wattmeter B Terminal block a Input system terminal b Output system terminal c Recessed part for wire connection operation d Reentrant width

Claims (6)

A tool for uninterruptible work using a watt-hour meter (A) having a terminal block (B) with a plurality of input system terminals (a) and output system terminals (b),
Inside the horizontally long container body (1) having an insulating structure, a plurality of conductive plates (4, 5) housed in a non-contact state with each other, and the upper end side of these conductive plates (4, 5) are connected. , A plurality of contact pins (8) whose bottom pin contact (9) protrudes or can be protruded below the container body (1), and each of these contact pins (8) is positioned below the container body (1). A plurality of compression springs (10) that are always pressed toward the
To the fixed guides (12, 12) provided at both longitudinal ends of the container body (1), through lever fixing pins (15, 15) horizontally provided along the front-rear direction of the container body (1). ,
A case fixing lever (3, 3) provided with a locking protrusion (33) protruding toward the center of the container body (1) is connected to one end (31) so as to be swingable.
Said fixed guide lock lever pin that is horizontally provided on the fixed guide which is separately formed (12, 12) and (16, 16) as a swing axis, drop rocking the container body (1) container main body contact portion for pressing move ( the lock lever (13, 13) contoured swingably linked allowed to Aru uninterruptible bypass tool electrostatic force meter has a structure having a 13a). The case fixing lever (3, 3) is always attached by the lever spring (20, 20) attached to the lever fixing pin (15, 15) so that the one end (31, 31) side faces the center side of the container body (1). The uninterruptible bypass tool for a watt-hour meter according to claim 1 , wherein the structure is provided with elasticity. The lock lever (13, 13) moves so that it protrudes to the outside of the position of the lock lever pin (16, 16) when the lock lever (13) is locked, and the case fixing lever (3) is unlocked. The uninterruptible bypass tool for a watt-hour meter according to claim 1 or 2 , wherein a stopper (13b, 13b) is provided to limit the swing movement in the direction. The lock lever (13, 13) includes a lock roller (18, 18) rotatably mounted on the container body pressure contact portion (13a) of the lock lever (13), and the lock roller (18, The uninterruptible bypass tool for a watt-hour meter according to any one of claims 1 to 3 , wherein 18) has a structure in which the container body (1) is pressed and lowered. Case fixing lever (3,3) has one end (31) to the container body (1) longitudinal to the length along the forming to Aru projection for locking (33) the (D), energy meter ( The watt-hour meter according to any one of claims 1 to 4 , which is formed larger than a lateral width (d) of the recessed portion (c) for wire connection operation formed in the terminal block (B) of A). Uninterruptible bypass tool. The lower surface (36) of the locking projection (33) formed on one end (31) of the case fixing lever (3, 3) is an inclined surface that rises toward the center in the longitudinal direction of the container body (1). The uninterruptible bypass tool for watt-hour meters according to any one of claims 1 to 5 .

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