JPS62241231A - Miniature circuit breaker - Google Patents

Abstract

(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to a compact circuit breaker that trips and interrupts a circuit when an overcurrent is detected.

[Prior Art] A conventional small circuit breaker includes a main contact portion, an overcurrent detection device, and a tripping mechanism.

When the tripping mechanism is operated, the tripping mechanism operates using a manual path to open and close the main contact portion, and when the overcurrent detection device detects an overcurrent, the tripping mechanism operates using a tripping path different from the manual path. The main contact portion is opened.

[Problems to be Solved by the Invention] By the way, in conventional small circuit breakers, the main contact portion is opened both when the tripping mechanism is operated by operation and when tripped due to overcurrent. , circuit interruption due to tripping is the same as circuit interruption due to operation, and for this reason, it is difficult to display externally whether or not there is a tripping condition, and there is a problem that requires considerable effort for inspection and maintenance. there were.

SUMMARY OF THE INVENTION In view of the problems of the prior art described above, an object of the present invention is to provide a small circuit breaker in which it is possible to simply and easily confirm from the outside whether or not the circuit breaker is tripped.

[Means for Solving the Problems] The present invention focuses on the fact that the tripping mechanism operates on a manual route and a different trip route, and displays a trip using the trip route. .

That is, the present invention includes a display means capable of externally displaying a trip state due to overcurrent, and a control means that controls the display means only when the tripping mechanism operates on the trip path. It has characteristics.

[Function] When the tripping mechanism is operated, it operates in the manual path, so
The main contact section is opened and closed. However, if the tripping mechanism operates in the heritable path when an overcurrent is detected, the control means causes the display means to indicate a trip condition.

In the present invention, as described above, only when the tripping mechanism operates in the 1-rip path, the display means is activated by the control means.
~ Since the lip state is displayed, it is possible to easily and reliably confirm whether or not the trip state is present.

[Example] ``Examples of the present invention will be described below with reference to the accompanying drawings. Figs. 1 and 2 are an explanatory side view and a cross-sectional side view showing a first example of the present invention.

The small circuit breaker of the embodiment shown in FIGS. 1 and 2 includes a main contact portion 1, a tripping mechanism 2, and an overcurrent detection lifting device 3.

The main contact part 1 has a fixed contact 5 provided on a fixed plate 4 and a movable contact 8 provided on a rotating arm 7 supported by a support pin 6. A current is made to flow through the detection device 3 to the load terminal 9.

The tripping mechanism 2 includes a handle 10 that is pivotally mounted, a first link 12 that has one end connected to it by a first pin 11, and one end that is connected to the other end of the first link 12 by a second pin 13. and a second link 15 whose other end is connected to the center of the rotating arm 7 by a third pin 14;
A response member 16 rotatably attached to the second link 15 and a movable iron piece 18 pivotally connected by a pin 17.
It has The responsive member 16 is connected to the second link 1.
5 and the engaging portion 12a of the first link 12.
The lip shaft 19 is engaged with a half-moon-shaped 1 that can be engaged with the lip shaft 19. The movable iron piece 18 is formed such that one end thereof extends to the side of the workpiece contact portion 16a formed on the response member 16, and the other end thereof extends to the overcurrent detection device 3.

In this tripping mechanism 2, when the handle 10 is operated in the direction of arrow A in the state shown in FIG. Both the second link 12.15 and the responsive member 16 move substantially downward, and the pivot arm 7 rotates clockwise due to the elastic force of a spring (not shown), so that the trip shaft 19 of the responsive member I6 and the first link 12 When the engagement with the engaging portion 12a is released, the movable contact 8 separates from the fixed contact 5, and the contact portion 1 is opened.

Also, when the main contact portion 1 is opened, the handle 10 is returned by the spring 2.
When the operation is performed in the mouth direction against the elastic force of 0, the first link 12 is displaced following this, and the first link 12
．． 15 and the response member 16 move substantially downward, the rotating arm 7 rotates counterclockwise against the elastic force of the spring, and the engagement portion between the trip shaft 19 of the response member 16 and the first link 12 12a, the IIr movable contact 8 comes into contact with the fixed contact 5, opening the main contact part (2).

This tripping mechanism 2 therefore operates with a substantially vertical manual path when operated by the handle 10.

Further, in the tripping mechanism 2, when the main contact portion 1 is in the open state, when the overcurrent detection device 3 attracts the movable iron piece 18 by detecting an overcurrent, the movable iron piece 18 moves counterclockwise around the pin 17. The workpiece contact portion 16 of the response member 16 is rotated to
When the first link 12 and the second link I5 move in the shape of a bellow, the response member 16 rotates together with the trip shaft 19, and the trip shaft 19 and the first link 12
is disengaged from the engaging portion 128, and the rotating arm 7 is rotated clockwise by the elastic force of the spring to open the main contact portion 1.

Therefore, when the overcurrent detection device 3 detects an overcurrent, the tripping mechanism 2 is configured to trip using a trip path different from the manual trip path by operating the handle 10.

The overcurrent detection device 3 is configured by a coil wound around the iron core 21, and when the -L contact portion 1 is opened, an overcurrent flows through the coil, thereby generating a magnetic force to cause the iron core 21 to trigger the tripping mechanism 2.
The movable iron piece 18 is attracted.

Therefore, the small circuit breaker of the embodiment is provided with a display button 25 which is a display means capable of displaying the lip state of 1, and a lock lever 31 and an urging lever 32 which are control means for controlling 19. It is being

The display button 25 is inserted through the case 22L, and has a flange 26 provided at the F section thereof, and a flange 26 and the case 2.
Usually, the head is embedded in the outer surface of the case 22, and the outer surface of the case 22 is pushed out by the elastic force of the spring 27. , the trip status can be displayed.

The lock lever; 31 is the second lock lever in the tripping mechanism 2.
It is rotatably attached to the trip path position of the link 15, and has an impacted portion 31a at its lower part, and a groove 31b is provided in a part of the hook 4. The biasing lever 32 is disposed below the display button 25, and is made of an elastic body whose tip engages with the groove 31b of the lock lever 31 as shown by the chain line. Then, only when the trip mechanism 2 operates in the L-rip path as detected by the overcurrent detection device 3, the second link 15 pushes the pressed portion 31a of the lock lever 31, and the second link 15 pushes the pressed portion 31a of the lock lever 31.
rotates around the pivot point, and the groove 31b and the biasing lever 3
2 is disengaged, the urging lever 32 uses its elastic restoring force to push the display button 25 against the elastic force of the spring 27, and the display button 25 thus displays the 1-lip state to the outside. I try to do that. Therefore, the elastic force of the biasing lever 32 is set larger than the elastic force of the spring 27.

Since the small circuit breaker of the embodiment is constructed as described above, its operation will be described next.

When the display button 25 is embedded in the case 22, when the tripping mechanism 2 is operated by the hand ring O, the first . Since the second link 12.15 operates in a substantially vertical direction to close the -L contact portion 1, the second link 12 is positioned at an appropriate distance from the date lever 31, which is the control means, so that the lock lever 31 never rotates.

Next, the overcurrent detection device 3 detects the overcurrent, and the tripping machine $
When the movable iron piece 18 of 1112 is attracted and the movable iron piece 18 rotates counterclockwise, the movable iron piece 18 hits the response member 16 and the first. Since the second link 12.15 operates in the trip path, the main contact 12.15 is opened and the handle 10 is returned to the off position.

When the I-rip operation of the tripping mechanism 2 occurs, the second link 15
The pressed portion 31a of the locking lever 31 is pushed in, the lock lever 31 rotates counterclockwise, the engagement between the groove 31b and the biasing lever 32 is released, and the biasing lever 32 presses the display button 25 due to its elastic restoring force. Since the display button 25 is pushed out of the case 22, the display button 25 can reliably display the trip state to the outside.

Note that the pushed-out display button 25 is connected to the biasing lever 32.
When pushed in against the elastic force, the tip of the biasing lever 32 engages with the groove 31b of the lock lever 31 and returns to its original position.

Therefore, only when the lock lever 31 and the biasing lever 32 are aligned and the mechanism 2 is tripped, the display button 25 displays the 1 to lip state to the outside, so the handle 1
Even if only the open state of the main contact portion 1 can be visually confirmed by the 0 position, it is possible to simply and easily confirm whether or not the main contact portion 1 is in the 1-rip state.

Such a miniature circuit breaker consists of a plurality of single circuits 7. as shown in FIG. , Y, X, and W, respectively.

Even if B, C, and D are installed and arranged side by side,
The 1-lip display on the display button 25 makes it very easy to determine which one has been 1-lip. Further, as shown in FIG. 4, if an alarm device 80 is used in conjunction with the display button 25, confirmation can be made at the site, and the alarm device 80 can also be used to confirm the situation even when away from the site. Furthermore, as shown in FIGS. 5 and 6, when a plurality of poles are provided in the same circuit, a fault in the circuit can be easily confirmed by displaying only one pole.

7 and 8 show a second embodiment of the invention.

This embodiment differs from the first embodiment in that the control means consists only of the lock lever 31, and the display button 25 serving as the display means is a pawl 31b' of the lock lever 31.
It has a spring 27 that is compressed between the hook portion 25a that is provided to engage with the hook portion 25a, the head portion of the hook portion 25a, and the case 22.

Then, when the tripping mechanism 2 is tripped, the second link 1
5 pushes the pressed part 31a of the lock lever 31,
The lock lever 31 rotates counterclockwise, and the claw 31b' disengages from the hook 258 of the display button 25.
is pushed up outside the case 22 by the elastic force of the spring 27.

Therefore, this embodiment can basically obtain the same effects as the first embodiment, and in addition, since the control means is composed of only the lock lever 31, it is different from the first embodiment. It can be simplified.

FIG. 9 shows a third embodiment of the invention.

This embodiment differs from the second embodiment in that the control means is the first one of the tripping mechanism 2. The lock lever 31 is configured to include a pushing member 33 mounted between the second pins 11 and 13 and the lock lever 31. When the tripping mechanism 2 is tripped, the pushing member 33 operates in the same way as the first link 12 and pushes the lock lever 31, so that the display button 25 displays the trip. Fundamentally the same effects as those of the previous embodiment can be obtained.

FIG. 10 shows a fourth embodiment of the present invention, in which the display button 25 is constructed in the same manner as in the first embodiment, and the control means is
In addition to the pushing member 33 and the lock lever 31, the biasing lever 3
2, and is a combination of various previous embodiments, and has similar effects.

11 and 12 show a fifth embodiment.

In this embodiment, the display button 25 has a collar portion 26 and a spring 27, and the control means includes the biasing lever 32 and the response member 16.
In the normal state, the biasing lever 32
A rotary lever 34 that engages with the lever 34 and disengages from the biasing lever 32 when it is brought into contact with the punching contact portion 16a.
It is composed of:

In this case, the movable iron piece 18 of the tripping mechanism 2 is attracted by the overcurrent detection bag w3, and the tripping contact portion 16a of the response member 16 is
When it makes contact with the rotary lever 34 (see Fig. 1), the striking contact part 16a collides with the rotating lever 34 and rotates it counterclockwise.
A trip is displayed when the rotation lever 34 and the biasing lever 32 are disengaged from each other. Therefore, this embodiment can also basically achieve the same effects as the previous embodiments.

FIG. 13 shows a sixth embodiment of the invention.

In this small circuit breaker, when the tripping mechanism 2 is tripped, when the pushing member 35 attached to the first bin 11 and the second pin I3 is operated, the pin 36 of the pushing member 35 is affected by the elastic force of the spring. By turning the anti-resistance switching lever 37 clockwise, the pin 38a of the switching lever 37 rides over a projection (not numbered) on the latch plate 38, and is held by the projection at the position shown by the solid line in the figure. limit switch 3
9.

This embodiment is different from the previous embodiments in that the control means includes not only the push member 35, the switching lever 37, and the latch plate 38, but also the display button 25 when the switching lever 37 is actuated. 22 and a protruding lever 40 protruding outward. Therefore, according to this embodiment, as a result of being able to display a trip, it is possible to reliably notify the trip status by both the display and the alarm, thereby providing reliability against trips.

FIGS. 14 and 15 show a seventh embodiment.

This embodiment differs from the sixth embodiment in that the control means includes a push member 35, a switching lever 37, and a latch plate 38.
The display button 25 is configured to rotate when the switching lever 37 is actuated to display a trip display in a color different from that when the main contact portion 1 is opened or closed by manual operation.

Therefore, the display button 25 is rotatably mounted inside the case 22, and has a display color 25 painted on one side of its tip surface.
' is located in a display window 23 provided in the case 22 during tripping operation to display the trip state.

Therefore, according to this embodiment, it is possible to simply and easily confirm whether or not the vehicle is in a trip state based on the color 25' of the display button 25.

FIGS. 16 and 17 show an eighth embodiment of the present invention.

In this small circuit breaker, the movable iron piece (not shown) of the tripping mechanism 2 is detected by overcurrent detection by an overcurrent detection device (not shown).
When the latch member 41 is operated, the movable iron piece rotates the latch member 41 in a clockwise direction to release the latch on the movable frame 42, and the movable frame 42 releases the pin due to the tensile force of the cutoff spring 44 stretched between the movable iron piece and the frame 43. 45 as the center as shown in FIG.
6 is also rotated around the pin 47 by the elastic force of the torsion spring 48, so that the movable contact 8 of the rotary arm 46 is separated from the fixed contact 5.

In this embodiment, the 1 display button 55 has a flange 56 and a spring 57, and the control means is a lever 61 which is pivotally supported by the frame 43 and whose one end is locked to the locking pin 49 of the rotating arm 46.
and a torsion spring 62 that biases the other end of the lever 61 in the direction of the display button 55. and,
During the tripping operation, when the locking pin 49 is released from the lever 6 by the movement of the rotating arm 46, the lever 61 is rotated counterclockwise by the elastic force of the torsion spring 62, and the elastic force of the spring 57 is activated. By pushing up the display button 55 against the pressure, the trip is displayed.

FIGS. 18 and 19 show a ninth embodiment of the present invention.

In this case, the operation of the movable iron piece 18 of the tripping mechanism 2 is utilized, and the control means is applied between the half-moon shaft 71 fixed to the movable iron piece 18 and the half-moon shaft 71 and the display button 65. It has a rotary plate 72 that is pivoted across and a spring 73 that biases the rotary plate 72 clockwise.

When the movable iron piece 18 is attracted to the overcurrent detection device 3 due to overcurrent detection, the half-moon shaft 71 is shifted from the rotary plate 72 at the same time, and the rotating plate 72 is rotated clockwise by the elastic force of the spring 73. By rotating and pushing up the display button 65, a trip is displayed.

According to this embodiment, in addition to being able to confirm whether or not it is in a trip state, when re-closing the circuit, even if an attempt is made to return the movable iron piece 18 to its original position by manual operation, unless the display button 65 is pushed in first, Since this is not possible, it is possible to confirm with certainty that the open circuit has not been manipulated.

FIG. 20 shows a tenth embodiment of the invention.

This embodiment differs from the ninth embodiment as follows:
The control means has a rotary lever 81 that is pivoted, and a spring 82 that biases the lever counterclockwise. The rotary lever 81 rotates clockwise against the elastic force of the spring 82, and when the engagement with the display button 65 is released, a trip is displayed.

According to this embodiment, the number of parts constituting the control means is smaller than in the ninth embodiment.

It can be simplified. Further, even if the control means is configured only by the rotary lever 81 without using the spring 82, the trip display can be performed, so that it is possible to further improve the m element.

21 and 22 show an eleventh embodiment of the present invention. This embodiment differs from the tenth embodiment in that the control means includes a rotary lever 81 and a spring 82.
Movable iron member 8 pivotally supported by movable iron piece 18 of tripping mechanism 2
3 and a spring 84 that biases the movable iron piece 18 in the direction of attracting the overcurrent detection device 3. In this embodiment, when the movable iron piece 18 is attracted by the overcurrent detection device 3, the movable iron member 83
is attracted against the elastic force of the spring 84 and collides with the rotating lever 8I, thereby reliably releasing the engagement between the rotating lever 81 and the display button 65. The relay operation between the movable iron member 831, the rotating lever 812, and the display button 65 is made stable.

In this case, the movable iron member 83 is configured as shown in FIG. 21 in this example, but may be arranged at the center of the movable iron piece 18 as shown in FIG. b
) may be arranged in parallel with the movable iron piece 18, and in any case, stability can be given to the relay operation at the time of tripping.

23 to 28 show a twelfth embodiment of the present invention. The small circuit breaker of this embodiment is applied to a multi-pole circuit breaker constructed by connecting a plurality of each circuit breaker.

As shown in FIGS. 27 and 28, the multi-pole circuit breaker is
For example, when two single-pole circuit breakers A and B constituting a two-pole circuit breaker are interlocked, one pole circuit breaker A operates to cut off when an overcurrent is detected, and its rotating arm 7 When the spring occurs, the multi-pole interlocking lever 1]7 is pressed by the pin 14 protruding from the rotating arm 7 and rotates counterclockwise via the interlocking rod 118, so that the other pole in the closed circuit state is The material contacting part 16a of the responsive member 16 of circuit breaker B is pressed by the tip 117a of the interlocking lever 117 and rotates counterclockwise in the same way as in the interrupting operation due to overcurrent detection, thereby interrupting the circuit of the other pole. The tripping mechanism 2 of device B also operates to shut off.
The rotating arm 7 is configured to spring up and separate the movable contact 8 from the fixed contact 5.

In this embodiment, the display button 25 has a flange 26 and a spring 27, and the control means includes a lock lever 31, a biasing lever 32, and locking rods connected to each of the circuit breakers A and B. 10
0.

As shown in FIGS. 23 to 25, the locking rod 100 is rotatably connected to each of the circuit breakers A and B, and the spring 27 of each circuit breaker on the peripheral surface thereof Two protrusions 101 and 102 are formed at appropriate angles and have different lengths at positions corresponding to the protrusions 101 and 102, respectively. A biasing lever 32 is located between the short protrusion 102 and the short protrusion 102 . To prevent this, the tip of the biasing lever 32 is formed to extend so as to extend between the protrusions 101 and 102.

For example, when an overcurrent flows through the circuit breaker A of one pole, causing the circuit breaker A to lip, the second link 15 of the tripping mechanism 2 releases the lock lever 3 and the biasing lever 32, so the biasing lever 32 pushes out the display button 25 to display the trip.

At this time, when the engagement between the lock lever 31 and the biasing lever 32 is released, the biasing lever 32 presses the protrusion 101 with its elastic force, and rotates the locking rod 11-rod 100 counterclockwise as shown in FIG. .

Further, in the circuit breaker B of the other pole, when the circuit breaker A of one pole is tripped, the interlocking rod 118. The response member 16 is tripped by the operation of the interlocking lever 117, and the response member 191 presses the lock lever 31, so the engagement between the lock lever 31 and the biasing lever 32 is released, and the display button 25 is released. Tries to display trip.

However, since the locking rod 100 is rotated by the urging lever 32 in the one-pole circuit breaker A, the urging lever 32 is rotated by the locking rod 100 as shown in FIGS. 25 and 26(b). 100, the biasing lever 32 itself engages with the lock lever 31 due to its own clockwise biasing force, and the display button 25 is not pushed out and is tripped to the display button. There is nothing to display.

Therefore, according to this embodiment, only the circuit breaker in which overcurrent is actually detected can be displayed as tripped.

29 to 32 show a thirteenth embodiment of the present invention.

In this embodiment, the small circuit breaker used in the eighth embodiment is configured as a multi-pole circuit breaker and applied thereto. As shown in FIG. 32, this multi-pole circuit breaker is configured such that when one pole circuit breaker trips,
A locking lever 127 connected to each circuit breaker performs a breaking operation to close the main contact portion 1.

In this embodiment, the control means includes not only the lever 61 and the torsion spring 62 but also the rotating frame 42 and the rotating arm 4.
6, and a connecting rod 1 connected to each circuit breaker and fixed to each locking plate 101.
10.

When the circuit breaker A of one pole is tripped due to overcurrent detection, the rotating frame 42 and the rotating arm 46 rotate, and the engagement between the locking pin 49 of the rotating arm 46 and the lever 61 is interrupted. Since the lever 61 is released, the elastic force of the torsion spring 62 causes the display button 55 to display a trip display, and when the rotating arm 46 rotates, the arm portion 1 of the locking plate 111
By pressing 11a, the locking plate 111 rotates counterclockwise together with the connecting rod 110.

At this time, in the circuit breaker B of the other pole, the locking plate 111 rotates together with the locking plate 111 of the circuit breaker A of one pole, so that it slips under the rotating frame 42 which is in the tripping operation. Since the operation of the rotating frame 42 is stopped midway at the top bending portion 111b, the rotating arm 46 is also stopped midway. As a result, the operation of the circuit breaker B of the other pole is stopped without hitting the stopper 50 of the rotating arm 46, so the engagement between the locking pin 49 and the lever 61 is not released, and the display button 55 is not released. 1-No lip display.

Therefore, according to this embodiment, when the circuit breaker of one pole is tripped to 1, the circuit breaker of the other pole is tripped, but no trip is displayed. Can be displayed.

FIGS. 33 and 34 show still another embodiment of the present invention.

In this case, limit switches for alarms installed on circuit breakers p, ), B, and c of each pole (see Figure 13)
This system electrically determines the difference in activation time of each limit switch activated by overcurrent detection of either circuit breaker, and depending on that determination, lights up the circuit breaker on the overcurrent detection side. I am trying to display it.

That is, in this embodiment, the judgment step @90 judges the activation timing of each limit switch, and based on the judgment, the indicator light 95 installed in the circuit breaker A on the side of the limit switch activated first is turned on. -I am trying to display the lip.

[Effects of the Invention] As described above, the present invention is configured so that a trip can be displayed to the outside only when an overcurrent causes a rip operation. It can be easily confirmed.

Therefore, according to the present invention, inspection, maintenance, etc. can be performed more easily.

[Brief explanation of drawings]

Figures 1 and 2 are explanatory side views and cross-sectional side views showing the first embodiment of the present invention, and Figures 3 (a) and (b) are small circuit breakers each installed in a plurality of circuits. Figure 4 (a) and (b) are a plan view and circuit diagram showing a small circuit breaker with alarms installed in multiple circuits, respectively; Figure 5; (a) and (b) are plan views and circuit diagrams showing multi-pole circuit breakers installed in the same circuit, and Figures 6 (a) and (b) are multi-pole circuit breakers each installed in multiple circuits. Fig. 7 is a side view of the main part showing the second embodiment of the present invention, Fig. 8 is a plan view showing the peripheral part of the display button, and Fig. 9 is a main part side view showing the second embodiment of the present invention. Third invention
FIG. 10 is a side view of the main part showing the fourth embodiment of the present invention. FIG. 11 is a side view of the main part showing the fifth embodiment of the invention. 13 is a sectional side view showing the sixth embodiment of the present invention; FIG. 14 is a sectional side view showing the seventh embodiment of the present invention; FIG. 16 is a side view of the main part showing the eighth embodiment of the present invention; FIG. 17 is a side view of the main part showing the trip state;
FIG. 18 is a side view of the main part showing the ninth embodiment of the present invention, FIG. 19 is a side view of the main part showing the trip state, and FIG. 20 is a side view of the main part showing the tenth embodiment of the invention. , FIG. 21 is a side view of essential parts showing the eleventh embodiment of the present invention, and FIG. 22 (a
) and (b) are a plan view showing a modification of the movable iron member and a plan view showing another modification. 23 to 28 show a twelfth embodiment in which the present invention is applied to a multi-pole circuit breaker, FIG. 23 is a side view of essential parts showing a small circuit breaker on one pole side, and FIG. 24 25 is a side view of the main parts showing the small circuit breaker on the other pole side, and FIG. 25 is a perspective view showing the peripheral relationship of the engagement rod.
FIGS. 26(a) and 26(b) are explanatory diagrams on one pole side and explanatory diagrams on the other pole side showing the relationship between the locking rod and the biasing lever,
FIGS. 27 and 28 are an explanatory diagram and a side view showing an interlocking mechanism for tripping and remaining in a multi-pole circuit breaker. 29 to 32 show a thirteenth embodiment in which the present invention is applied to another multi-way circuit breaker, and FIG. Fig. 30 is a side view of the main parts showing the small circuit breaker on the other pole side, Fig. 31 is an explanatory perspective view showing the peripheral relationship of the connecting rods, Fig. 32 is a cross-sectional side view showing the multi-pole circuit breaker, FIG. 33 is a circuit diagram showing still another embodiment of the present invention, and FIG. 34 is a time chart showing the activation timing of the limit switch when each circuit breaker trips. DESCRIPTION OF SYMBOLS 1... Main contact part, 2... Tripping mechanism, 3 - Overcurrent detection device, 25-27.55-57.65-67...
Display means, 31-38.40.6], 62.71-7
3.81-84...control means.

Claims (1)

[Claims] 1. It has a display means capable of displaying a trip state due to overcurrent to the outside, and a control means that controls the display means only when the tripping mechanism operates on the trip path. Small circuit breaker.