GB2066574A - Switchable electric fuse mounting for fuse cartridge - Google Patents
Switchable electric fuse mounting for fuse cartridge Download PDFInfo
- Publication number
- GB2066574A GB2066574A GB8018203A GB8018203A GB2066574A GB 2066574 A GB2066574 A GB 2066574A GB 8018203 A GB8018203 A GB 8018203A GB 8018203 A GB8018203 A GB 8018203A GB 2066574 A GB2066574 A GB 2066574A
- Authority
- GB
- United Kingdom
- Prior art keywords
- fuse
- contact
- neutral conductor
- fuse mounting
- contacts
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Withdrawn
Links
- 239000004020 conductor Substances 0.000 claims abstract description 61
- 230000007935 neutral effect Effects 0.000 claims abstract description 56
- 230000004048 modification Effects 0.000 abstract 1
- 238000012986 modification Methods 0.000 abstract 1
- 238000009434 installation Methods 0.000 description 5
- 230000004308 accommodation Effects 0.000 description 1
- 230000008878 coupling Effects 0.000 description 1
- 238000010168 coupling process Methods 0.000 description 1
- 238000005859 coupling reaction Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000010616 electrical installation Methods 0.000 description 1
- 238000003780 insertion Methods 0.000 description 1
- 230000037431 insertion Effects 0.000 description 1
- 238000002955 isolation Methods 0.000 description 1
- 239000002184 metal Substances 0.000 description 1
Classifications
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
- H01H9/00—Details of switching devices, not covered by groups H01H1/00 - H01H7/00
- H01H9/10—Adaptation for built-in fuses
- H01H9/104—Adaptation for built-in fuses with interlocking mechanism between switch and fuse
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
- H01H23/00—Tumbler or rocker switches, i.e. switches characterised by being operated by rocking an operating member in the form of a rocker button
- H01H23/02—Details
- H01H23/10—Adaptation for built-in fuse
- H01H23/105—Fuses mounted on, or constituting the movable part of, the switch
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
- H01H1/00—Contacts
- H01H1/12—Contacts characterised by the manner in which co-operating contacts engage
- H01H1/14—Contacts characterised by the manner in which co-operating contacts engage by abutting
- H01H1/20—Bridging contacts
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
- H01H85/00—Protective devices in which the current flows through a part of fusible material and this current is interrupted by displacement of the fusible material when this current becomes excessive
- H01H85/0078—Security-related arrangements
- H01H85/0091—Security-related arrangements providing disconnection of the neutral line
Landscapes
- Switch Cases, Indication, And Locking (AREA)
- Fuses (AREA)
Abstract
A switchable fuse mounting has an additional switch cam (11) on the movable switch fuse holder (4) for the fused live conductor 6, 6', 8, 8' and this cam (11) engages a moving contact (9') with a fixed contact 9 in the neutral conductor path so as to close or interrupt the neutral path when the switch member is moved into a position corresponding to closure or interruption of the fused live conductor path. The neutral switching operation leads the live switching operation on re-establishment of contact and lags behind the live switching operation on interruption of contact. In a modification a closure member for a threaded cartridge fuse may operate a pair of bridging contacts in the live and neutral lines respectively. <IMAGE>
Description
SPECIFICATION
Switchable electric fuse mounting for fuse
cartridge provided with switchable neutral
conductor contacts
The invention relates to disconnectable electric
fuse mountings.
Fuse mountings are known from FR-PS
2191234 and DAS 2334595, but the fitted fuse
mountings disclosed in these documents do not
have any neutral conductor contacts.
Nowadays, if a disconnectable neutral
conductor is required for an electrical installation
basically the same appliances are used as for
holding fuse cartridges, but either the fuse
cartridges themselves are replaced by a non
removable metal casing (see FR-PS 21 91234) or a second current path for the neutral conductor is
provided in a switch preceding the fuse cartridge
(DAS 2334595). In this last mentioned design the
insertion opening for the screw cap of the fuse
cartridge would be closed by a dummy plug which
is not extractable either. In both cases, the
switchable fitted fuse mounting with neutral
conductor contacts has to be made up of two
separate ddvices, ganged together for instance by
rivets, the one device containing the fuse cartridge
and the second device the neutral conductor
switch contacts.The switch handles of the fitted
fuse mounting and of the adjoining "neutral
conductor switch" mounting are, in this
arrangement, mechanically interconnected so that
upon isolation of the phase conductor the neutral
conductor is disconnected at the same time.
Because of the usual present coupling of a
disconnectable fitted fuse mounting with a fitted
neutral conductor, the space requirement in a
distributor casing e.g. an in-the-wall recessed
distributor box in which the devices are to be fitted
is very great. This applies particularly in the case
of an alternating current installation since for each
phase output via a fitted fuse mounting, an
associated disconnectable neutral conductor is an
absolute requirement. In addition, extra
expenditure on parts, e.g. additional casing
components, complicated contact parts, dummy
plugs etc. is required. There is the additional factor
that this extra expenditure on components also
entails additional labour costs in terms of
assembly time.Particularly, in the case of such
mass-produced articles such as these disconnectable fitted fuse mountings with neutral
conductor contacts, the costs are in the last
analysis a decisive factor, where there is also the
additional consideration that, in accordance with
the present day dimensions of the devices, the
above-mentioned casing must have a great width.
Electrical ganging together, e.g. by means of a bus
bar at the input side, is only possible with
considerable technical expenditure since at
present the connection terminals of the fitted fuse
mounting are located on the same contact plane
with those of the neutral conductor mounting
coupled with them.
The basic problem to be solved by the invention is the provision of the known switchable fitted fuse mounting with a switchable neutral conductor path in such a way that the width dimension may be kept as narrow as possible, while the expenditure on parts and assembly is considerably reduced. Preferably a problem free electric connection of the supply terminals may be effected by use of the invention.
Accordingly the present invention provides a switchable electric fuse mounting for fuse cartridges provided with end contacts comprising a casing; a switch member in said casing and swerving to interrupt the fused live conductor; neutral conductor contacts inserted in said casing of the fitted fuse mounting and connected to connection terminals; and an additional switch cam connected to said switch member and operable to open and close the current path between said neutral conductor contacts.
The advantages obtained by means of the invention include the fact that it is no longer necessary to use a separate housing for the neutral conductor mounting since the neutral conductor contacts are installed with their connecting terminals, in the housing of the switchable fuse mounting. The interruption of the neutral conductor is effected by means of an additional switch cam on the movable inner component, for example the rockable holder for the fuse cartridge, or by means of an additional projection from the switch element in the switch pin preceding the fuse cartridge insert. In this content, it is useful to arrange the switch cam in such a position that the interruption of the neutral conductor path is effected so that it leads the live conductor interruption and that on reestablishment of contact the live switch lags behind the neutral switch.Offsetting the neutral conductor contact terminals in relation to the contact terminal of the fuse contacts offers the particular advantage that the electric ganging of the devices at the input side may be effected by the usual bus bars, the so-called comb bars where the height of installation is not increased.
The use of an illuminated indicator for recognising the switch state, or the operating state of the fuse cartridge is advantageous as far as the use is concerned since, as has been shown in practice, the actual indicator device or "telltale" of the fuse cartridge does not always fulfil its function.
In order that the present invention may more readily be understood the following description is given, merely by way of example, of several embodiments of the invention, with reference to the accompanying drawing, in which:
FIGURE 1 shows a cross-section through one form of a fuse mounting with neutral conductor contacts, where the fuse insert is inserted into a pivotable inner component;
FIGURE 2 is a side view of the fuse mounting of
Figure 1;
FIGURE 3 is a cross-section through another form of fuse mounting with neutral conductor contacts, where the fuse insert is heid in the inner component by means of a screw cap; and
FIGURE 4 is a side view of the fuse mounting of
Figure 3.
The fuse mounting shown in Figure 1 consists of two casing halves 1, 2. In the cross-sectional view of Figure 1 , the front casing half 2 is not shown. Into the rockable inner component 3, there is inserted the fuse carrier 4. For the sake of clarity the fuse cartridge located in the fuse carrier 4 has been omitted.
If the fuse carrier 4 is rocked into the switched on position by means of the actuating handle 5, the contact springs 6, 6' of the casing make contact with the end contact cap of the fuse cartridge since the contact springs 6, 6' come to lie on the end contact caps of the fuse cartridge projecting from recesses 7, 7' of the inner component 3. The switched on position of the inner component 3 and of the fuse carrier 4 is shown in dashed lines.
A simpler design of the switchable fitted fuse mounting is obtained if the insertable fuse carrier 4 is dispensed with. The rockable inner component 3 is then itself designed for the accommodation of the fuse cartridge and has an added, shaped actuating handle. The contact springs 6, 6' carry the contact terminals 8, 8' for the mains supply and fused outlet respectively.
The direction of the current path, i.e. the direction of current flow along the non-illustrated supply and outlet conductors, is indicated by arrows in the drawing.
In the lower part of the casing halves 1, 2, are the neutral conductor contacts 9, 9' which are also provided with contact terminals 10, 10' for the supply and outlet. It goes without saying that the contact terminals 8, 8' which are represented in the drawing as cage terminals, may also be designed as screw contact terminals like the contact terminals 10, 10'.
By means of a switch cam lobe 11 arranged on the rockable inner component 3, the neutral conductor contacts 9, 9' are also jointly interrupted in the switched off position. The switch cam lobe may instead have a different shape, for instance, the shape of a curvilinear cam face. In the switched on position, the contact of the neutral conductor 9' is pressed by a helical spring 12 on to the contact of the other neutral conductor 9, and makes electrical contact.
The positioning of the switch cam 11 is selected in such a way that the switching on or switching off respectively of the contacts of the
neutral conductors 9, 9' is effected before or after
switching on or off of the live contacts (the fuse end and the contacts 6, 6') depending on the position of the fuse insert at the instant of switching on and off.
A glow lamp 25 is connected in parallel between contact spring 6' and the neutral conductor contact 9'. The contact terminal 10 of the neutral conductor contact 9 located below the contact terminal 8 of contact spring 6, to allow for bus bars to be fixed on the supply side which are staggered in height and arranged below each other thereby avoiding an increase in the height of the installation. In a manner which is known per se, the preferably strip-shaped contact components are kept in the casing halves 1,2 in corresponding recesses, projections and ribs in itself. This also applies to the embodiment shown in Figure 3.
Figure 3 shows a further embodiment of a disconnectable fitted fuse mounting with neutral conductor contacts. This mounting also consists of two casing halves 1 3, 14 but in contrast to the embodiment shown in Figure 1, the supply line is switched off not by an inner component accommodating the fuse cartridge or the fuse carrier, but instead by means of a switch 1 5 located in the current path ahead of the fuse cartridge. In this Figure too, the fuse cartridge to be inserted into the accommodating space 16 is omitted.The fuse cartridge is introduced in a way known in itself by means of a screw cap - which likewise has been omitted for the sake of greater clarity - into the accommodating space 16 6 and produces, by its end contact caps, electric contact between an end contact 17 and a threaded socket 1 8 for the fuse cartridge. The end contact 1 7 and the threaded socket 1 8 have cage terrnnals 24, 24' for the connection of the supply and output respectively.The neutral conductor contacts 19, 19' have contact screws 20, 20'. The switch element 21 to be likened to the rockable inner component of the Figure 1 embodiment of switchable fuse mounting with neutral conductor contacts has an additional switch cam 22 for the connecting bridge 23 of the neutral conductor contacts 1 9, 1 9'. By giving the air gaps of the switch for the fused live conductor dimensions different from those of the neutral conductor, the desi-ed leading and trailing effect in switching the neutral conductor is obtained in the simplest way.
Offsetting the contact terminals 20, 20' of the neutral conductor laterally in relation to the contact terminals 24, 24' of the live conductor to the fuse cartridge, secures the advantages already referred to with an electric connection by means of a bus bar on the input side.
The embodiment of Figures 3 and 4 may, if desired have an indicator lamp similar to the indicator lamp 25 of Figure 1.
Switchable fitted fuse mountings with switched neutral conductor contacts, as proposed in accordance with the present invention, have a smaller width than previous switched appliances connected in bands to carry out the same junction.
As is known, such fitted appliances are built according to a nine Module System based on the appliance width. With a fitted fuse mounting of the type shown in Figure 1, two module units can thus be saved and with a fitted fuse mounting of the type shown in Figure 3, three Module units (which at present are additionally required for the neutral conductor mounting) can be saved.
At present, it is usual to arrange twelve fitted fuse mountings next to each other as a standard design in one distributor housing. If these conventional fuse mountings must be provided with a switchable neutral conductor, then with the known cartridge fuse mountings the number is reduced to six fitted fuse mountings and six coupled neutral conductor mountings in the case of an alternating current installation. With a three phase current installation there will be a reduction by one circuit if the conventional fuse mountings and neutral line switch units are fitted in the same space.
By using the switchable fitted fuse mountings with built-in switchable neutral conductor contacts, in accordance with the invention, the number of circuits which can be fitted into a given space will be the same as the number of switchable cartridge fuse holders which can be fitted into the same space without provision for switching of the neutral line, because of the compactness of the appliances in accordance with this invention.
Both of the illustrated embodiments have, in the bottom of the housing 1, a recess which is closable by a spring detent gate to allow the housing to be snapped onto a support rail (not shown) in a bank of similar fuse mountings, and to be released from the support rail by manual actuation of the spring detent gate.
Claims (9)
1. A switchable electric fuse mounting for fuse cartridges provided with end contacts comprising a casing; a switch member in said casing and serving to interrupt the fused live conductor; neutral conductor contacts inserted in said casing of the fitted fuse mounting and connected to connection terminals; and an additional switch cam connected to said switch member and operable to open and close the current path between said neutral conductor contacts.
2. A switchable electric fuse mounting according to claim 1, wherein said additional switch cam is carried by the switch member in such a way that the switching operation for the interruption and re-establishment of the neutral conductor contacts occurs before the switching operation of the fuse cartridge for reestablishment of contact and after the switching of the fuse cartridge for the interruption of contact.
3. A switchable electric fuse mounting according to claim 1 or claim 2, wherein said connection terminals of the neutral conductor contacts are offset in the casing in relation to the connection terminals for the switchable fused live conductor.
4. A switchable electric fuse mounting according to any one of claims 1 to 3, wherein one of said neutral conductor contacts and a corresponding contact for the fuse cartridge are efectrically interconnected via an illuminated indicator.
5. A switchable electric fuse mounting according to any one of claims 1 to 4, wherein said switch member is a rotary socket for said fuse cartridge and said additional switch cam projects from said rotary socket to engage a moving contact of said neutral conductor contacts.
6. A switchable electric fuse mounting according to any one of claims 1 to 4, wherein said switch member is a spring biased axially movable pin carrying a moving contact of the fused live conductor and has said additional switch cam at one end thereof to engage a movable contact of said neutral conductor contacts.
7. A switchable electric fuse mounting according to claims 2 and 6, wherein the distance, measured in a direction axially of said pin, between said moving contacts of the live and neutral conductors is greater in the "contact established" configuration of the switch than in the "contact interrupted" configuration.
8. A switchable electric fuse mounting according to any one of claims 1 to 7, and including a spring detent-operated mounting to support said casing on a support rail in a bank of similar fuse mountings.
9. A switchable electric fuse mounting constructed and adapted to operate substantially as hereinbefore described with reference to, and as illustrated in, Figures 1 and 2, or Figures 3 and 4, of the accompanying drawing.
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DE2952132A DE2952132B1 (en) | 1979-12-22 | 1979-12-22 | Disconnectable electrical built-in fuse bases for fuse links with end contact caps and separable neutral contacts |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| GB2066574A true GB2066574A (en) | 1981-07-08 |
Family
ID=6089519
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| GB8018203A Withdrawn GB2066574A (en) | 1979-12-22 | 1980-06-04 | Switchable electric fuse mounting for fuse cartridge |
Country Status (8)
| Country | Link |
|---|---|
| BE (1) | BE883797A (en) |
| DE (1) | DE2952132B1 (en) |
| DK (1) | DK542280A (en) |
| ES (1) | ES8200520A1 (en) |
| FR (1) | FR2474238A1 (en) |
| GB (1) | GB2066574A (en) |
| IT (1) | IT1131215B (en) |
| NL (1) | NL8005178A (en) |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| FR2514942A1 (en) * | 1981-10-21 | 1983-04-22 | Hager Electro | Rocking mains switch with fuse-holder - allows live and neutral lines to be separately closed and only allows access to fuse when live circuit is open |
| FR2551915A1 (en) * | 1983-09-08 | 1985-03-15 | Hager Electro | Improvements to circuit cut-outs with oscillating holder carrying a fuse cartridge and forming a cam for control of an auxiliary circuit |
| FR2728384A1 (en) * | 1994-12-20 | 1996-06-21 | Legrand Sa | CIRCUIT BREAKER WITH FUSE HOLDER HANGER |
| WO2004034415A1 (en) * | 2002-10-09 | 2004-04-22 | Klaus Bruchmann | Multipolar fuse circuit breaker assembly |
Families Citing this family (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE3424556A1 (en) * | 1984-04-04 | 1985-10-31 | Lindner Gmbh, Fabrik Elektrischer Lampen Und Apparate, 8600 Bamberg | Electrical installation fuse base for melting fuses |
| DE3568104D1 (en) * | 1984-04-04 | 1989-03-09 | Lindner Gmbh | Built-in fuse socket for cut-out fuse |
| DE19956295C1 (en) * | 1999-11-23 | 2001-09-06 | Klaus Bruchmann | Breaker protection unit has fuse carrier, fuse status indicator with contacts connected via conducting connections to bridge element and second unit connection |
| DE50006530D1 (en) | 1999-11-23 | 2004-06-24 | Klaus Bruchmann | SWITCH FUSE UNIT WITH FUSE HOLDER AND FUSE STATUS DETECTOR |
| AT505093B1 (en) * | 2004-01-19 | 2013-02-15 | Moeller Gebaeudeautomation Kg | ELECTROMECHANICAL SWITCH |
| US7855873B2 (en) * | 2004-09-13 | 2010-12-21 | Cooper Technologies Company | Panelboard for fusible switching disconnect devices |
Family Cites Families (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE959290C (en) * | 1954-06-01 | 1957-03-07 | Licentia Gmbh | Switching device, in particular installation circuit breakers, with thermal and magnetic release |
| GB869242A (en) * | 1958-08-25 | 1961-05-31 | North Western Electric Applian | Improvements relating to temperature controls for electrically heated appliances |
| FR2191234B1 (en) * | 1972-06-28 | 1976-08-06 | Faeam | |
| DE2334595B1 (en) * | 1973-07-07 | 1974-04-25 | Lindner Gmbh Fabrik Elek Scher | Fuse base with a switch for fusible links |
| DE2445262A1 (en) * | 1974-09-21 | 1976-04-08 | Bbc Brown Boveri & Cie | Safety cct. breaker with fuse socket - has actuating lever for coupling fuse between head and bottom contacts |
| DE2642223A1 (en) * | 1976-09-20 | 1978-03-23 | Schulte Elektrotech | Electrical fuse unit with fuse changing device - using rotatable switch ring carried by fuse capsule to disconnect power during fuse changing |
| FR2431762A1 (en) * | 1978-07-19 | 1980-02-15 | Legrand Sa | Circuit breaker with rocker switch retaining cartridge fuse - breaks live circuit and independent neutral circuit when fuse is exposed |
-
1979
- 1979-12-22 DE DE2952132A patent/DE2952132B1/en not_active Withdrawn
-
1980
- 1980-05-30 IT IT22446/80A patent/IT1131215B/en active
- 1980-06-04 GB GB8018203A patent/GB2066574A/en not_active Withdrawn
- 1980-06-12 BE BE0/201021A patent/BE883797A/en unknown
- 1980-09-16 NL NL8005178A patent/NL8005178A/en not_active Application Discontinuation
- 1980-12-08 FR FR8025997A patent/FR2474238A1/en not_active Withdrawn
- 1980-12-19 ES ES497969A patent/ES8200520A1/en not_active Expired
- 1980-12-19 DK DK542280A patent/DK542280A/en unknown
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| FR2514942A1 (en) * | 1981-10-21 | 1983-04-22 | Hager Electro | Rocking mains switch with fuse-holder - allows live and neutral lines to be separately closed and only allows access to fuse when live circuit is open |
| FR2551915A1 (en) * | 1983-09-08 | 1985-03-15 | Hager Electro | Improvements to circuit cut-outs with oscillating holder carrying a fuse cartridge and forming a cam for control of an auxiliary circuit |
| FR2728384A1 (en) * | 1994-12-20 | 1996-06-21 | Legrand Sa | CIRCUIT BREAKER WITH FUSE HOLDER HANGER |
| WO2004034415A1 (en) * | 2002-10-09 | 2004-04-22 | Klaus Bruchmann | Multipolar fuse circuit breaker assembly |
Also Published As
| Publication number | Publication date |
|---|---|
| ES497969A0 (en) | 1981-11-01 |
| NL8005178A (en) | 1981-07-16 |
| FR2474238A1 (en) | 1981-07-24 |
| DE2952132B1 (en) | 1981-06-11 |
| BE883797A (en) | 1980-10-01 |
| ES8200520A1 (en) | 1981-11-01 |
| IT1131215B (en) | 1986-06-18 |
| IT8022446A0 (en) | 1980-05-30 |
| DK542280A (en) | 1981-06-23 |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| WAP | Application withdrawn, taken to be withdrawn or refused ** after publication under section 16(1) |