Classifications

• • H—ELECTRICITY
  • H01—ELECTRIC ELEMENTS
  • H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
  • H01H71/00—Details of the protective switches or relays covered by groups H01H73/00 - H01H83/00
  • H01H71/02—Housings; Casings; Bases; Mountings
  • H01H71/025—Constructional details of housings or casings not concerning the mounting or assembly of the different internal parts
• • H—ELECTRICITY
  • H01—ELECTRIC ELEMENTS
  • H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
  • H01H89/00—Combinations of two or more different basic types of electric switches, relays, selectors and emergency protective devices, not covered by any single one of the other main groups of this subclass
  • H01H89/06—Combination of a manual reset circuit with a contactor, i.e. the same circuit controlled by both a protective and a remote control device
• • H—ELECTRICITY
  • H01—ELECTRIC ELEMENTS
  • H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
  • H01H71/00—Details of the protective switches or relays covered by groups H01H73/00 - H01H83/00
  • H01H71/08—Terminals; Connections

Definitions

• the invention relates to a protective device, in particular an overload relay for attachment to a switching device, in particular a contactor, according to the preamble of claim 1.
• the invention further relates to a combination switching device with a switching device, in particular a contactor, and a protective device attached thereto, in particular an overload relay, according to claim 6.
• a generic protective device may in particular be a thermal or electronic overload relay, which can be assembled with a switching device in the form of a contactor to form a device combination.
• a generic protection device has an insulating material housing, comprising a front side, a first and a second narrow side, a first and a second broad side, and a fastening side.
• switchgear assemblies in which an additional terminal on the protective device, so for example the thermal or electronic relay is provided, to which a conductor piece is looped through to the inaccessible terminal on the switching device.
• the inaccessible terminal of the protection device is in a sense relocated to the protection device at a location accessible there.
• the disadvantage of this is that additional costs arise through the additional terminal and the looped conductor end.
• the installer has a higher installation effort on site, since he must close two terminals when connecting, for example, the coil terminal.
• switching device combinations have become known in which the coil connection terminal is arranged obliquely on the contactor and protrudes slightly from the housing in order to achieve better accessibility of the coil connection. Although this facilitates accessibility, but has the disadvantage that, if the conductor is then passed by the side of the device, space for further switching devices is lost.
• An essential aspect of the invention is that the housing wall of the protective device, on a first side facing the switching device, and a second side facing away from the switching device, each have at least one first and second recess. has, and that the recesses are interconnected, so that the switching device is accessible through the recesses for connecting a connecting conductor.
• the embodiment of the protective device according to the invention has the advantage that when the protective device is connected to the switching device to a combination switching device through the two recesses and their connection through a terminal on the side facing the protective device of the switching device from the side facing away from the switching device of the protection device remains accessible without requiring additional space and without having to attach an additional part to the switching device.
• a connection conductor for example to a coil connection of a contactor to which an overload relay is attached, can thus be led through the recesses in the housing wall of the overload relay to the connection terminal of the contactor and screwed there.
• the first and second recesses are preferably connected by a channel-shaped channel running at least partially in the housing wall of the protective device.
• “Trough-shaped” means that the connecting channel is open on one of its longitudinal sides to the outside.
• At least partially extending in the housing wall means that at least one extending in the longitudinal direction boundary wall of the channel-shaped channel is formed by the housing.
• the term of the channel-shaped channel according to the invention also a channel fall, which is open on two longitudinal sides.
• the surface geometry of such Two-way open channel can also appear as a stage in the housing surface, which runs in the longitudinal direction of the channel.
• connection channel offers the possibility of guiding the connected coil wire along this channel.
• An overload relay according to the invention can, for example, be fastened with one of its narrow sides to a narrow side of a contactor.
• the terminal of the Contactors that should remain accessible, for example the coil terminal of the contactor, are located on the narrow side of the contactor to which the relay is attached.
• the first recess is located in the housing wall of the overload relay at the level of the connection opening on the contactor, the second recess is located on the second narrow side of the housing of the overload relay facing away from the connection opening.
• the channel-shaped channel then runs in a preferred embodiment of the invention in the front of the overload relay and connects the two recesses.
• this constructive geometric configuration of the overload relay ensures that, despite a relatively small distance between the protective device and the switching device in the device combination, good accessibility of the connection opening, for example of the coil connection to the contactor, is ensured in the intermediate space between the devices.
• the cross-sectional area of the first recess is greater than the cross-sectional area of the channel, and the channel is widened towards the first recess.
• the channel can be widened, for example, by a bevel.
• the first recess may for example be so large that it detects two or more adjacent terminal openings on the switching device, such as a coil terminal and one or more auxiliary contact terminals.
• one or more connection conductors can optionally be routed through the channel to one or more connection openings.
• This embodiment is advantageous, for example, in small shooters, which also have auxiliary contacts in addition to the main terminals and the coil terminal on the same level, because their accessibility can be achieved in a simple manner by an additional slope at the end of the connection channel.
• Such an advantageously designed protective device is characterized in that the first recess in the housing wall is widened in two directions, wherein the directions of the widening perpendicular to the longitudinal extension direction of the channel in the plane of the first, the switching device facing side of the housing wall.
• FIG. 1 is a schematic representation of a switching device combination according to the invention with a switching device and a protective device attached thereto in a first embodiment
• FIG. 2 is a schematic representation of a switching device combination according to the invention with a switching device and a protective device attached thereto in a second embodiment
• Fig. 3 shows the protective device of the embodiment of FIG. 1, viewed from the arrival end side, as well as
• Fig. 4 shows the protective device of the embodiment of FIG. 2, viewed from the connection side.
• the overload relay 4 is connected to its first housing side 41, Also referred to as the first narrow side, with the connection side 21, also referred to as a narrow side of the contactor 2 connected.
• the distance between the contactor 2 and the overload relay 4 is very low, both are close to each other, so that a tight design is achieved with a small footprint.
• the circumferential contour of the first narrow side 41 of the overload relay 4 is approximately equal to the peripheral contour of the connection side 21 of the contactor.
• the contactor 2 has on its upper side of the housing 27 openings for the actuation of fferan gleichklemmen.
• the openings 24, 25, 26 are assigned to the phase connections, the opening 23 to an auxiliary contact and the opening 22 to the coil connection.
• the phase connection terminals and the auxiliary contact and coil connection terminals are arranged in one plane.
• the first side of the housing 41 of the overload relay 4 has this a second side of the housing 42, also referred to as the second narrow side. This is stepped, so that a front narrow side 43 and a rear narrow side 44 is formed.
• On the front narrow side 43 are three connection openings with the associated terminal actuation openings 45, 46, 47 for the connection of the phase conductors and on the rear narrow side 44 are two pairs 48, 49; 50, 51 of connection openings with the associated terminal actuation openings for connecting auxiliary contacts.
• a groove-shaped channel 62 is introduced in the vicinity of the edge with the longitudinal side 60, the bottom of which runs at the level of the front front side 63 of the housing.
• the channel 62 is open to the longitudinal side 60, so that one could also speak of a stepped contour.
• the dashed contour lines 64 show the course of the housing contour if the channel-shaped channel 62 were not present. It can be seen that in this case, that is, if the housing had the contour drawn in dashed lines, the first narrow side 41 of the overload relay 4 would cover the narrow side 21 of the contactor 2 over the entire width of the narrow side. There would then no longer be access to the coil terminal 22a and the auxiliary contact terminal 23a on the contactor 2 given.
• a first recess 65 is formed on the first narrow side 41 of the overload relay at the level of the coil connection opening 22a and the auxiliary contact connection opening 23a of the contactor, and a second recess 66 is formed on the rear narrow side 44. Both recesses 65, 66 are through the channel-shaped channel 62 connected.
• the first recess 65 has a larger area than the second recess 66. This is achieved by a chamfer 67 in the inner wall 68 of the channel-shaped channel 62.
• the coil connection opening 22a and the auxiliary contact connection opening 23a of the contactor 2 of the second recess 66 th forth through the channel-shaped channel 62 and the first recess 65 accessible. In this case, no additional space is required outside the circumferential contour of the combination switching device 1, for example, to be able to connect a connection conductor to the coil connection opening 22a or the auxiliary contact connection opening 23a of the contactor 2.
• the inner structure and the arrangement of the internal components and assemblies of the overload relay 4 according to the invention can be substantially left as they would in an overload relay without the recesses of the invention and the channel according to the invention, so if the housing contour corresponding to the dashed contour 64 run. Only the auxiliary contact connection openings 48, 49, 50, 51 are pushed together so that on the rear narrow side 44, a sufficient space for the recess 66 is available.
• FIG. 2 shows a further embodiment of a combination switching device 101 with a contactor 102 and an overload relay 104 attached thereto.
• the parts or assemblies correspond to the same or similar elements described in connection with Figure 1 or assemblies are in Figure 2 with the same, but by 100 referenced reference numbers as indicated in Fig. 1.
• the coil terminal 122a is disposed at a lower level than the phase terminals 124, 125, 126.
• the first recess 165 is in the first narrow side 141 of the overload relay 104 perpendicular to the longitudinal direction of the channel-shaped channel 162 and in the direction of the fastening side 169 of the housing of the overload relay 104 is widened. This is achieved by a chamfer 170 of the edge, which is formed at the transition of the first narrow side 141 and the longitudinal side 160 of the housing.
• the first recess 165 thus effectively forms a second channel running vertically downwards towards the coil connection.
• FIG. 2 shows a connecting conductor 70, which is connected to the coil terminal 122a of the contactor 102 and guided in the first recess 165 and the channel-shaped channel 162 towards the second narrow side 142 of the housing of the overload relay 104.
• FIG. 3 shows a view of the first narrow side 41 of an overload relay 4, as used in the combination switching device 1 according to FIG.
• the parts or assemblies correspond to those described in connection with Figure 1 and have the same reference numerals. You can see the three connecting pins 71, 72, 73, with which the overload relay can be attached to the phase terminals of a contactor.
• the overload relay according to FIG. 3 also has a second, vertically extending channel formed by the vertical extension of the first recess 165 on the edge, as described in connection with the embodiment according to FIG. 2, and which has access to one in a plane below the phase terminals on the relay arranged coil terminal allows.
• FIG. 4 shows a view of the first narrow side 141 of an overload relay 104 as used in the combination switching device 101 according to FIG. 2 and as described in connection with FIG.
• the parts or assemblies correspond to those described in connection with Figure 2 and bear the same reference numerals. It is designed with a horizontally extending channel-shaped channel 162 and a vertical channel 165 extending at the edge which forms the first narrow side 141 with the longitudinal side 160.

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• Switch Cases, Indication, And Locking (AREA)

Applications Claiming Priority (2)

Publications (1)

Family

ID=40510389

Family Applications (1)

Country Status (5)

Families Citing this family (9)

Citations (1)

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• 2008
  • 2008-12-10 EP EP08868732A patent/EP2223323A1/de not_active Withdrawn
  • 2008-12-16 DE DE102008062250A patent/DE102008062250A1/de not_active Ceased
  • 2008-12-18 WO PCT/EP2008/010868 patent/WO2009083173A1/de active Application Filing
  • 2008-12-18 CN CN2008801275381A patent/CN101971282A/zh active Pending
• 2010
  • 2010-06-21 US US12/819,612 patent/US20100296216A1/en not_active Abandoned

Patent Citations (1)

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