KR970004581B1 - Protection apparatus - Google Patents

Abstract

No summary

Description

Protective devices mate to control modules and / or signal modules

1 and 2 are cross-sectional views of a protective switch according to an embodiment of the present invention.

3, 4 and 5 are cross-sectional views of the protection device of the type shown in FIG. 1 coupled to the control and signal modules, and FIG. 3 shows a switch in the set state (on state).

4 shows a protection switch in a tripped state by the operation of the control module without changing the state of the signal module.

5 shows a switch in a trip state by the operation of the electronic trip position.

6, 7 and 8 show the operation principle of the trip mechanism.

9 and 10 show control modules responsive to the absence of voltage (Figure 9) and the presence of voltage (Figure 10), respectively.

* Description of the symbols for the main parts of the drawings *

(10): protective switch (11): insulated case

(12): base portion 17: contact bridge

(18), (19): movable contact (20), (21): fixed contact

(22), (23): conductive portion 28: thermal trip device

(29): Electronic trip device (31): Trip mechanism (lock)

(38): Plate (41): Striker Lever

(42): hole (52), (52 '): side boundary area

(53), (54): side (55), (56): notch

(63): rectangular upper edge (64): portion perpendicular to the plate displacement axis

(65): inclined portion (66), (68): driving coupling finger

(67): Signal modul (69): Control modul

(81): Moving Amateur (83): Delivery Bar

The present invention relates to, for example, a circuit breaker type protective switch that can be coupled to a control module and / or a signal module.

This type of switch is usually composed of a prism-shaped case having a base having a central groove in the longitudinal direction to be fitted to a support rail having a hat-shaped cross section.

This case has a potential-negative accumulator trip mechanism, commonly referred to as a lock, which can be tripped by a manual control mechanism or by an electronic trip device in response to a short circuit or by a thermal trip device in response to an overload. It houses a switch unit with a mobile assembly that can be operated on a potential energy accumulating trip mechanism. The control mechanism is also used to reset the lock. The magnetic thermal trip device may include a striker lever for tripping a tripping mechanism which acts directly on the moving assembly bundle and reliably extends the operation of the striker lever when a short circuit occurs.

The cross section of the case of such a switch has the opposite shape of the letter T, and usually this case also has two sides oriented perpendicular to the longitudinal axis of the rail. These sides are provided as assemblies and / or mating surfaces that can attach the sides of adjacent switches or additional modules. The coupling to the additional modulus or switch mechanism is performed by the male and female coupling members respectively provided on the switch or the modul.

In the Federal Republic of Germany Patent No. 38 37 461, a signal module having a mechanism which operates a display member or a switch connected to a signal circuit and is driven by a tripping device of the switch via a coupling means is provided. The structure added to is proposed.

This kind of signal module makes it possible to indicate the set / trip state of a switch either directly or indirectly through an auxiliary switch.

It is an object of the present invention to provide a protective switch that is improved so that a control module for a trap member of a tripping mechanism can be coupled to at least one side of this type of switch. The control module may, for example, be a device responsive to the presence or absence of a voltage or, more generally, a remote control device for a trip device of a suitable kind.

The operation of the control module must be appropriate to the operation of the switch and the associated auxiliary module.

In addition, it is preferable that the signal module distinguishes the tripping by the electronic trip device or the thermal trip device from the tripping by the control module.

Since the tripping by the electronic trip device shows a short circuit on the line, it is dangerous to re-energize the circuit before removing the cause of the short circuit.

On the other hand, if the current does not flow temporarily after tripping by the control module, it is not dangerous to re-energize the circuit.

In order to achieve these objects, the protective switch of the present invention can be operated by a manual control mechanism or a tripping device for potential energy accumulation that can be tripped by a tripping device in response to a short circuit or a tripping device in response to an overload. A case accommodating a switch device having a bundle, wherein the trip member of the trip mechanism is translatable in a direction perpendicular to the base portion of the case, and thus at least two consecutive trips initiated from the set position and the set position; And the end position limiting the movement of the extension member imparted by the tripping element in response to the intermediate position and the short circuit, in particular the tripping device, wherein the extension member is provided on two sides of the case, respectively. Said side having two opposing side edges that are movable opposite two openings formed The corner is engaged with the driving engagement finger of the additional control body which displaces the trip member of the trip mechanism from the set position to the first trip position through the opening, or when operated by a trip device in response to a short circuit. A pair of outlet contacts in this direction for engaging the driving engagement finger of the additional signal module which outputs a signal indicating a short circuit when the member is moved beyond the intermediate position (first trip position) to the distal position (second trip position). It characterized in that it is formed to have each.

Preferably, the signal modulus is a bistable tripping base having a current centered upper center position that can be changed from the idle state to the trip state when the coupling finger is moved beyond the intermediate position and then returned to the idle position only by manual operation. consist of.

1 and 2, the protection switch 10 is a double contact low voltage multipole circuit breaker in which only one pole is shown.

The switch 10 is composed of an insulated case 11 having a base portion 2 and a lid 13, which has a protrusion 14 on the front thereof and a member for fitting the switch to a standard rail on the back thereof. (15) is provided.

Each pole of the switch 10 is arranged one on each side of the intermediate plane P common to all the poles, and each stationary contact has a movable contact on each of the conductive portions 22 and 23. To take one of the closed positions interacting with (20) and (21) and the open position separated from the fixed contacts (20) and (21) and automatically tripped in response to an overcurrent fault or in response to manual control. It consists of a contact bridge 17 having two movable contacts 18, 19 suitable.

The first conductive portion 22 is directly connected to the first electrical connection terminal 26, and the second conductive portion 23 is a bimetallic strip type thermal trip device 28 and a short circuit providing protection against overcurrent. The second battery connection terminal 27 is electrically connected through a series electric circuit composed of a striker-type electronic trip device 29 which provides protection against current.

In this embodiment, the electronic trip device and the thermal trip device are integral parts of the co-magnetic thermal trip assistance device 30.

Further, a tripping mechanism (lock) 31 having a relatively thin thickness in the direction perpendicular to the middle plane P is arranged in the flat central partition 32 of the switch 10, and the tripping mechanism 31 is provided with all poles. Is common to.

In the present embodiment, the striker of the electronic trip device 29 of each pole is normally combined with the support surface of the hole 42 near the lower end of the flat plate 39 constituting the lock trip member (FIG. 1). And a rotation lever extending as close to the intermediate plane P as possible through the opening 43 formed in the side wall 31 a of the lock 31 and extending with respect to the side wall 31 a of the partition part 32. (41).

Referring to FIG. 1, the contact bridge 17 is biased in the contact closure direction by a return / pressure spring 44 supported against the bottom of the case 11. This contact bridge 17 can be moved in the direction of opening the contact by a drive plunger 45 which supports the bridge and forms part of a member common to all poles, where the number of plungers is equal to the number of poles. Is configured.

After the electric trip device 29 of each pole senses a short circuit, the striker lever 41 rotates through the flat plate 38 which is driven in a direction parallel to the intermediate plane by the traction force applied by the striker lever. After the lock 31 is tripped (the response time of the lock 31 is greater than the impact time of the striker lever 41), the plunger 45 is rotated when the striker lever is rotated in a plane approximately crossing the intermediate plane. Since the striker lever 41 is operated by the striker lever 41, the striker lever 41 opens the contact very quickly, and in this trip position, the actuator 39 of the lock 31 ensures the opening of the contact and the intermediate plane. Move in parallel (see Figure 2).

Referring to FIG. 1, the actuator may be operated by a control device (not shown) or by a manual control device operated by a thermal trip device 28 of each pole in response to an overload detected by the thermal trip device 28. The plunger 45 is driven by the actuator 39 of the lock 31 when the 39 is tripped.

Referring to Figures 1 and 2, the pushbutton 50 for opening (i.e. off) trips the lock 31 and for reset / closing (i.e. on) arranged in the partition 32. The push button 51 protrudes from the front of the case 11. The push buttons 50 and 51 may be replaced by predetermined equalization means such as a rocking button or a rotation / reset / close / open knob, as long as it does not deviate from the technical scope of the present invention.

The flat plate 38, the drawing device 39, and the striker lever 41 are in the rising position (see FIG. 1) in the normal operation state in which the push button 51 for " on " In addition, all three of these members are in the lowered position (see FIG. 2) after the electronic trip device 29 detects a short circuit, but only the actuator 39 is used after the thermal trip device 28 detects an electrical overload. Or the push button 50 for "off" is pressed down to the lowered position.

The manual control and reset mechanism associated with the pushbuttons 50, 51 includes an inclined member 130 that rotates about an axis DD perpendicular to the plane PP (FIGS. 3 through 3). See also 8). The inclined member 130 engages with the respective contact surfaces 133 and 133 'on the pushbuttons 50 and 51 at respective side surfaces of the ends of the arms 132 and 132'. Contact surfaces 131 and 131 ', respectively. This contact surface is, for example, a round papillary projection.

The inclined member 130 interacts with the pawl 123 through the link 122 and interlocks with the member 126. In addition, the fool 123 is supported or released by the hook 124 to rotate about the axis (125). The member 126 is engaged with the actuator 39 which rotates about the axis 127 and acts on the contact bridge and is also spring loaded with the actuator 38 by a trip / open spring 128. .

When the actuator 39 is in the ascending position (3rd and 6th degrees), the movable contact members 18 and 19 come into contact with the fixed contacts 20 and 21 (contact closure), and the actuator 39 ) Is in the lowered position (4, 5, 7, and 8), the movable contact members 18, 19 are separated from the fixed contacts 20, 21 (opening contact). do. Components (dynamic system) 122 to 128 constituting the control mechanism are well known, and thus detailed description thereof will be omitted.

3 and 6 show the closed (“on”) position of the circuit breaker. When the push button 50 is pressed, the inclined member 130 is inclined counterclockwise as shown through the contact surface 131. The contact surface 131 'contacts the contact surface 133' of the push button 51 which protrudes from the front surface. The dynamic systems 122-128 move the actuator 39 to the elevated position shown.

For example, when an electrical failure is detected by the thermal trip device 28 or the electronic trip device 29, the hook 124 rotates clockwise as shown in FIG. 7 to release the pole 123. do. As a result, the member 126 is released. At this time, since the member 126 and the actuator 39 are connected with the spring 128 so as to be rotatable, the actuator 39 is lowered by the force of the spring 128 to open the contact. In the second phase, when the push button 50 is raised by a spring (not shown), the contact surface 131 is coupled to the contact surface 131 through the contact surface 134 opposite the contact surface 133 to watch the inclined member 130. Rotate in the direction. The contact surface 131 'acts on the contact surface 134' of the pushbutton 51 to lower the pushbutton, so that the final position of the pushbutton is as shown by the dotted line.

In the closed state shown in FIG. 6, when the push button 51 is pressed to manually open the contact (see FIG. 8), the inclined member 130 is driven by the contact surface 133 'and the contact surface 131'. Direction, the push button 50 is raised by the interaction of the contact surface 133 and the contact surface 131.

As shown in Figs. 2, 3 and 4, the flat plate 38 constituting the tripping member of the lock 31 vibrates along the axis perpendicular to the base portion 12 and is flat (PP). It is a substantially rectangular shape parallel to). Specifically, the flat plate 38 is adjacent to two side surfaces 53 and 54 of the case 11 of the switch, respectively, and has a rectangular opening 57 formed on the adjacent side surfaces 53 and 54. Two parallel side boundary regions 52, 52 'having notches 55, 56 approximately opposite 58; An opening 59 into which a pin 60 fixed to the hook 124 is inserted to rotate the hook 124 and release the pole 123 by the downward movement of the flat plate 38 from the set position; The extension part 61 in which the hole 42 into which the edge part of the striker lever 41 of the magnetic thermal systems 29 and 30 is inserted is formed is formed.

The notches 55 and 56 each have a back surface substantially parallel to the displacement axis of the plate, a straight upper edge 63 perpendicular to the axis, a portion 64 perpendicular to the axis and an inclined portion. Each of the lower edges of 65 consecutively includes.

The upper edge 63 of these notches acts on the "drive" coupling finger 66 of the signal modulus 67 disposed opposite the side 54 of the case 11, as in this embodiment. Configure suitable drive contacts.

The portions 64 of the lower edges of the notches 55 and 56 are " driven " of the control module 69 disposed opposite the side 53 of the case 11, as in this embodiment. Configure a drive contact suitable for acting on the engagement finger 68.

These features are characterized in that the coupling finger 66 is inserted into the notch 56 and the signal module 67 and coupling finger 68 mounted on the side 54 are inserted into the notch 55 so that the side 53 It can be seen from FIGS. 3, 4 and 5 showing a circuit breaker with a control module 69 mounted on the circuit board.

In the present embodiment, the signal module 67 is a double safety trip mechanism having an upper center position of current failure, and is configured as follows. That is, the signal module 67 passes through a rectangular opening formed in the case of the module 67 so as to coincide with the opening 58 of the side 54 when the signal module 67 is assembled to the side 54. An actuator rod that is inserted into the tooth 56 and supports the central portion of the coupling finger 66 that extends in the horizontal direction and slides in the sliding surfaces 71 and 72 parallel to the axis of motion of the plate 38. 70 and; One end is fixed to the rod 70 by a nipple 74 and the other end is attached to a fixed support point 75 fixed to the modulus 67, and an axis xx 'perpendicular to the rod 70. A pressure spring (73) oscillating between two stable positions on each side of the < RTI ID = 0.0 >) < / RTI > It consists of a signal / reset button 77 which pivots about the axis 78 on the front face 14 'of the modulus 67 and is mechanically coupled to the other end of the rod 70.

Therefore, the signal module 67 has two states. That is, the rod 70 subjected to the spring load by the spring 73 is in the raised position defined by the contact to hold the button 77 substantially in line with the front face 14 ', and the switch 76 in the normally open position. The standby state does not affect the lower portion of the rod 70; The button 77 is a spring 73 caused by the downward movement of the coupling finger 66 to move beyond the upper center position of the current failure, i.e., the nipple 74 moves downward in the axis xx '. It is inclined by the protruding from the front surface 14 'and has a tripping state in which the switch is kept closed by the rod 70.

As described above, in order to return the signal module 67 to the standby state, the rod 70 is inclined in the opposite direction until the rod 70 passes through the upper center position of the electric pail in the opposite direction and returns to the original stable state. Manual operation of button 77 is required. After that, the switch 76 is returned to the normally open position.

The switch 76 can, of course, control the signal circuit and can be incorporated into the monitoring circuit.

The control module 69 disposed on the side surface 53 of the circuit breaker has a solenoid 80 configured to translate the 83 by receiving an inclined moving amateur 81 biased by a spring 82. Doing. The end of the transfer bar 83 supports the engaging finger 68 inserted into the notch 55 (after the opening 57 passes) through the opening 57 of the side surface 53 of the modulus.

The control module 69 may be, for example, a trip device that responds to the presence or absence of a voltage.

First, in the case of a tripping device responsive to the absence of a voltage, the solenoid 80 is arranged such that the moving armature 81 is disposed between the rear face 85 of the case of the control module 69 and the fixed yoke 84. It may be located as shown in FIG.

In this case, during the normal operation, the solenoid 80 is operated to hold the moving amateur 81 against the action of the spring 82 and against the fixed yoke.

Thus, the engagement finger 68 is in the raised position and does not act on the plate 38.

However, if the solenoid does not operate due to the absence of voltage, the moving amateur 81 is displaced by the spring 82 away from the fixed yoke 84 so that the engaging finger 68 moves downward (Fig. 9). Location shown at).

During this movement, the engagement finger 68 of the control modulus 69 acts on the portion 64 of the lower edge of the notch 55, whereby the plate 38 moves downward. That is, the flat plate (trip member) 38 is moved from the set position to the first trip position by the control module 69.

The hook 124 is rotated sequentially by the downward movement of the flat plate 38 to release the pawl 123, and the lock 31 is tripped.

In the case where the control module is a tripping device which responds by the presence of a voltage, the solenoid 80 has a fixed yoke 84 facing the rear surface 85 and the moving amateur 81 on the rear surface, in contrast to the above example. Exhaust to be located on the opposite side of the surface (see FIG. 10).

In this case, during the normal operation, the coil of the solenoid 82 is not operated so that the moving amateur 81 is held away from the fixed yoke 84 by the spring 82.

In addition, the engaging finger 68 is in a raised position and is not applied to the flat plate 38.

However, when the solenoid is operated by the presence of the voltage, the moving amateur 81 is moved toward the yoke 84 against the action of the spring 82 so that the coupling finger 68 moves downward.

The movement causes the lock 31 to trip in the manner previously described.

Preferably, the width of the notch 55 does not cause any movement of the rod 70 of the signal module 67 beyond the top center position of current impulse by the movement of the plate 38 by the coupling finger 68. As a result, the width of the signal modal 67 is not changed.

The flat plate 38 is moved by the movement of the striker lever 41. At this time, the movement of the flat plate 38 becomes larger than the movement by the control module 69. Therefore, the rod 70 moves to the second trip position beyond the upper center position of the current failure, thereby changing the state of the signal module 67.

In order to prevent the operation of the striker lever 41 which adversely affects the moving amateur 81 of the solenoid 80, it has the same width as the total amount of movement of the plate generated by the striker lever 41 except the thickness of the finger. The notch part 55 is formed in the control module 69 side.

In this example, the width of the notch 56 on the signal module 67 side is smaller than the width of the notch 55 on the control module 69 side. This width is approximately equal to the amount of movement of the finger 68 excluding the thickness of the finger. The striker lever 41 should be able to change the state of the signal mother wool 67 without acting on the control module 69 and the lock 31 without aging the state of the signal module wool 67. Must be able to trip

However, this solution has the drawback that only a certain type of module (control module or signal module) can be connected to the side of the switch.

In order to eliminate this drawback, the notch 55 having the same height as the notch 56 may be added to offset the engagement finger 66 in the height direction with respect to the engagement finger 68.

With this kind of configuration, the signal module and the control module can be connected to the side surfaces 53 and 54 of the switch 11.

An important advantage of the switches already described is that, after tripping in response to a short, the circuit breaker can only be reset if the signal module 67 is returned to standby by manual operation of the button 77. .

While the engagement finger 66 is held on the plate 38 in the trip position, it is impossible to return the lock 31 to the set position (because the pole 123 cannot be held by the hook 124).

The inclined portions 65 of the corners of the notches 55 and 56 allow the additional modules 67 and 69 to be mounted in either state.

If the signal modulus 67 is in a tripping state at the time of mounting, the finger 68 is positioned at the lower position as in the case where the control modulus 69 is operated, and the notch 56 (or the notch 55) of the notch 56 is located. The action of the finger 66 (or finger 68) on the inclined portion 65 causes the plate 38 to move downward to trip the lock 31.

Claims (17)

A switch having a mobile assembly which can be operated by a manual control mechanism or a trip device 29 responding to a short circuit or a potential energy accumulating trip mechanism 31 that can be tripped by a trip device 29 responding to an overload. In the protective switch having a case for receiving the device, the trip member 38 of the trip mechanism 31 translates in a direction perpendicular to the base of the case, wherein the trip mechanism 31 is Drive coupling fingers 68 of the added control module 69 for displacing the trip member 38 of the trip mechanism 31 from the set position to the first trip position through the openings formed in the two side surfaces 53 and 54. And an additional signal module for outputting a signal indicating a short circuit when the trip member 38 is moved to the second trip position beyond the first trip position when the trip member 38 is operated by the trip device 29 responding to the short circuit. Drive coupling of the duol (67) Protective switch, characterized in that it interacts with the finger (66). 2. The trip member (38) according to claim 1, wherein the trip member (38) is offset in the translational direction of the trip member and at the same time a pair of contacts (63, 64) into which the driving finger (68) or the driving finger (66) can be inserted. A protective switch, characterized in that it has two opposing side edges (52, 52 ') formed to each have. 3. The method of claim 2, wherein one of the two pairs of contacts (63, 64) interacts exclusively with the coupling finger (68) of the control module (69), and the other pair of contacts contacts the signal module (67). A protective switch, characterized in that to engage exclusively with the coupling finger (66). 3. The two pairs of contacts (63, 64) are each adapted to interact with the coupling finger (68) of the control module (69) or the coupling finger (66) of the signal module (67). Protective switch, characterized in that the interaction with. 5. The tripping member according to any one of claims 1 to 4, wherein the trip member is constituted by a plate (38) which can be translated in a direction perpendicular to the base portion (12) of the case (11). ) Is a protective switch, characterized in that formed by the notch portion of the side edges (52, 52 ') of the plate (38). The protection switch according to claim 5, wherein the plate (38) is provided with a hole (42) into which an end portion of the striker lever (41) of the trip device (29) is inserted in response to a short circuit. The signal module (67) according to any one of claims 1, 2, 3, 4, and 6, wherein the tripping member (38) is connected to the first trip position by a coupling finger (66). And a bistable trip mechanism having an upper center position of a current immunity which can be changed from a set state to a trip state and then returned to a rest position only by manual operation when moving over. 6. The notch part of claim 5, wherein, when the notch part is mounted to a switch, the signal module 67 is in a trip state and the control module 68 is in an operating state, or the signal module 67 is in a trip state. Or when the control module 68 is in an operating state, the inclined portion for causing the plate 38 to move downward by the coupling fingers 66 and 68 to trip the trip device 31. 65) a protective switch comprising: 5. The control module according to any one of claims 1 to 4, wherein the control modulus (69) is provided with a solenoid having a moving armature (81) which is engaged with the coupling finger by a spring load and is also received (83). A protective switch characterized in that. 9. A protective switch according to claim 8, wherein said control module (69) constitutes a trip device responsive to the absence of a voltage. 9. A protective switch according to claim 8, wherein said control module (69) constitutes a trip device responsive to the presence of a voltage. 6. The signal module (67) according to claim 5, wherein the signal module (67) is changed from the set state to the trip state when the trip member (38) moves beyond the first trip position by the coupling finger (68), and then rests only by manual operation. And a double safety trip mechanism having an upper center position of a current interruption capable of returning to a position. 7. The notch part of claim 6, wherein, when the notch part is mounted to a switch, the signal module 67 is in a trip state and the control module 68 is in an operating state, or the signal module 67 is in a trip state. Or the inclined portion 65 which causes the plate 38 to move downward by the coupling fingers 66 and 68 so as to trip the trip device 31 when the control module 62 is in an operating state. The protective switch characterized in that it comprises a). 8. The notch part of claim 7, wherein when the notch part is attached to a switch, the signal module 67 is in a trip state and the control module 68 is in an operating state, or the signal module 67 is in a trip state. Or the control module 62 is in the operating state, the inclined portion 65 which causes the plate 38 to move downward by the coupling fingers 66 and 68 to trip the trip device 31. Protection switch characterized in that it comprises a). 6. A protective switch according to claim 5, wherein the control module (69) is provided with a solenoid having a moving armature (81) which is subjected to a spring load and is engaged with a coupling finger by a transfer bar (83). 9. A control module according to claim 6 or 8, characterized in that the control modulus (69) is provided with a solenoid having a moving armature (81) which is subjected to a spring load and is engaged with the coupling finger by a transfer bar (83). Protection switch. 8. A protective switch according to claim 7, wherein the control modulus (69) is provided with a solenoid having a moving amateur (81) which is subjected to a spring load and is engaged with the coupling finger by a transfer bar (83).