CN1329343A - Electromagnetic switch equipment, especially contactor - Google Patents
Electromagnetic switch equipment, especially contactor Download PDFInfo
- Publication number
- CN1329343A CN1329343A CN 01121419 CN01121419A CN1329343A CN 1329343 A CN1329343 A CN 1329343A CN 01121419 CN01121419 CN 01121419 CN 01121419 A CN01121419 A CN 01121419A CN 1329343 A CN1329343 A CN 1329343A
- Authority
- CN
- China
- Prior art keywords
- switchgear
- bridge
- contact
- abrasive material
- scaling loss
- 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.)
- Granted
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Classifications
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
- H01H1/00—Contacts
- H01H1/0015—Means for testing or for inspecting contacts, e.g. wear indicator
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- 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
- H01H71/00—Details of the protective switches or relays covered by groups H01H73/00 - H01H83/00
- H01H71/04—Means for indicating condition of the switching device
- H01H2071/044—Monitoring, detection or measuring systems to establish the end of life of the switching device, can also contain other on-line monitoring systems, e.g. for detecting mechanical failures
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- 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
Landscapes
- Switch Cases, Indication, And Locking (AREA)
- Push-Button Switches (AREA)
- Contacts (AREA)
- Train Traffic Observation, Control, And Security (AREA)
Abstract
The invention relates to an electromagnetic switching device in particular to an contacter, comprises contact (1) with fixed contact pieces (2) and moving contact bridge (3), the contact bearing surfaces (8) of which have initial contact coating thickness (d) in new product condition. The contact bearing surfaces (8) are burnt off according to a number of hystereses (N) under rated load. The bridge (3) which is holden in a retaining zone (7) can be raised from the bridge support (6) by fixed contact pieces (2), wherein the bridge support (6) at least in retaining zone (7) is made from a wear resistant material. Thus the material loss by burning measures at most 10% of initial contact coating thickness (d) after a number of hystereses (N) on condition that the bridge support (6) in retaining zone (7) is under rated load.
Description
The present invention relates to a kind of electromagnetic switchgear according to the nominal load design, contactor particularly, it comprises at least one load contacts, but this contact has fixed contact and movable contact bridge, but described movable contact bridge its contact coating under the new product state has initial contact coating layer thickness, wherein said contact coating under nominal load after the switching manipulation of certain number of times by scaling loss, to touch bridge and be contained in the touching bridge and can lift from a fixed contact on the bridge bracket of touching in the synchronization zone (Mitnahmebereich), the wherein said bridge bracket that touches is made with high-abrasive material in the synchronization zone at least.
This switchgear for example is disclosed among the European patent document EP0855727A2.A kind of similar switchgear is also disclosed in Germany Patent document DE3030702C2.
In prior art, also disclose the method for measurement of contact thrust, and therefrom determined the total scaling loss amount and the corresponding switchgear residual life of contact coating.For example referring to relevant Germany Patent document DE4427006A1 and DE19603319A1 and DE19603310A1.
In the applied method of prior art, measure that magnetic circuit is opened and the time of load contacts between opening.From the time of being measured, calculate the contact thrust again.This known method implied condition is that contact thrust and the time of being measured have the correlation on the function.But the inventor recognizes, in touching the synchronization zone of bridge bracket,, have lifting of impact from fixed contact, can cause the extruding of material and the wearing and tearing of material owing to touch bridge along with the carrying out of time, it can have influence on the time of being measured, thereby causes contacting the erroneous calculations of thrust.
The objective of the invention is to, the above understanding of describing based on the inventor provides a kind of electromagnetic switchgear, above-mentioned erroneous calculations wherein no longer occurs.
The object of the present invention is achieved like this, that is, select described high-abrasive material in the following manner, make and in the scope of synchronization zone, touch bridge bracket under nominal load, after the switching manipulation of certain number of times, its material scaling loss amount is 10% of initial contact coating layer thickness to the maximum.
The measured time only is affected in very little scope, does not exceed the measurement range of contact thrust and residual life.
Certainly, described material scaling loss amount should be as far as possible little.Its numerical value for example is 5% or littler, particularly less than 2% as far as possible less than 10%.
If described high-abrasive material is a kind of metal, particularly steel, X5GNi steel for example, the bridge bracket that touches that then is in the scope of synchronization zone will be wear-resisting especially.As selecting also can use wear-resistant plastic, particularly PA6T/6I (GF40%), perhaps PEEK.
If described high-abrasive material is a kind of plastics, the then described bridge bracket that touches can be selected all to make with high-abrasive material, perhaps only makes with high-abrasive material in the synchronization zone.Which kind of in these two kinds of schemes, selects depend on concrete condition.
If be in the different of the material that touches bridge bracket and other positions in the scope of synchronization zone, then described high-abrasive material must be connected with other partial fixings that touch bridge bracket.Possible connected mode is to surround die casting (Umspritzen), embedding and locking and bonding.If high-abrasive material is a kind of plastics then can adopts bi-component die casting (Zweikomponentenspritzguss) manufacturing.
Switchgear of the present invention is preferably provided with a thrust measuring circuit, is used to measure the total scaling loss amount of described contact coating.
Described switchgear has a fitting surface and one and is positioned at this and assembles aspectant front end face, and on described front end face, be provided with a total scaling loss quantity display apparatus that links to each other with described thrust measuring circuit, whether operating personnel can learn contact coating scaling loss at once like this, whether need change described load contacts, and need not this electromagnetic switchgear dismounting.
Contrast accompanying drawing illustrated embodiment is further described other advantages of the present invention and details below.Accompanying drawing is the principle schematic diagram.
Fig. 1 represents the essential structure of a contactor,
Fig. 2 represents a load contacts that is in the new product state,
Fig. 3 represents load contacts shown in Figure 2 situation after the switching manipulation of certain number of times under nominal load,
Fig. 4 represents the stereogram of a contactor,
Fig. 5 represents the synchronization zone part,
Fig. 6 represents the another kind selection of structure shown in Figure 5.
Contactor shown in Figure 1 is a kind of example of electromagnetic switchgear, has three load contacts 1.But each in the described load contacts 1 all has two fixed contacts 2 and a movable contact bridge 3.
When contactor is connected, in the coil 4 current flowing is arranged.Can attract connecting the armature 5 that touches bridge bracket 6 like this.The described bridge bracket 6 of touching touches bridge 3 with it be pressed onto on the fixed contact 2 this moment.
When contactor disconnects, stop current flowing in the coil 4.Armature 5 falls.Touch bridge 3 and be contained in the synchronization zone 7 (seeing Fig. 2 and Fig. 3) of touching bridge bracket 6, and lift from fixed contact 2 in the mode of jerking.
Fixed contact 2 and touch bridge 3 as shown in Figure 2 its contact coating 8 under the new product state, have initial contact coating layer thickness d.Described contactor is in off-state in structure shown in Figure 2.In each switching manipulation, promptly in each switch circulation of contactor, scaling loss will take place in contact coating 8.So described load contacts 1 only has the limited life-span.The life characteristics of contactor or load contacts 1 can be represented with the switch times N under the nominal load, reaches this number of times back contact coating 8 with scaling loss.This load contacts 1 with contact coating 8 of scaling loss is represented with the contactor of connecting in Fig. 3.
Described as shown in Figure 1 fixed contact 2 links to each other with transmission signals with a thrust measuring circuit 9.Coil 4 also links to each other with transmission signals with thrust measuring circuit 9.By calculating electric current present or voltage peak in fixed contact 2 and the coil 4, can measure the moment that magnetic circuit and load contacts 1 are opened when contactor carries out the transition to off-state.Open the moment according to this and can measure total scaling loss amount of contact coating 8, thereby can draw the residual life of contactor.The detailed measurements method of scaling loss amount is seen above-mentioned patent documentation DE4427006A1, DE19603319A1 and DE19603310A1.
Described thrust measuring circuit 9 links to each other with the display unit 10 of total scaling loss amount.For example can constitute in display unit 10 described in the simplest situation by light-emitting diode 10.Described thrust measuring circuit 9 and light-emitting diode 10 are set in place as shown in Figure 4 in a module of contactor main body side.This module can be selected to link to each other with the contactor main body by fixing or removable mode.
If light-emitting diode 10 is not controlled, contact coating 8 scaling loss not as yet for example then.If light-emitting diode is luminous in continuous firing, then represent contact coating 8 scaling loss.In case of necessity a kind of flash of light mode can be set between this two states, expression contact coating 8 is soon with scaling loss.Can select each load contacts 1 have separately light-emitting diode 10 or all load contacts 1 shared light-emitting diodes 10.
For example can also select total scaling loss amount is to be shown by a light-emitting diode 10 in 20% o'clock, total scaling loss amount be 50% o'clock by second diode displaying, total scaling loss amount be 80% o'clock by the 3rd diode displaying.
Described light-emitting diode 10 is positioned at end face 11 as shown in Figure 4.This end face 11 is positioned at the opposite of installed surface 12, is fixed on the fixture 13 at contactor on this installed surface.
As mentioned above, total scaling loss amount can be measured according to time difference and the switch over travel corresponding with it.Therefore importantly, described switch over travel should the total scaling loss amount of actual expression.In order to reach this point, the described bridge bracket 6 that touches is made with a kind of high-abrasive material in locking range 7 at least.By this high-abrasive material can guarantee to touch bridge bracket 6 in synchronization zone 7 through after the switch times N under the nominal load, its material scaling loss amount is 10% of initial contact coating layer thickness d to the maximum.In Fig. 5 of back and Fig. 6, demonstrate the concrete make of the synchronization zone 7 of touching bridge bracket 6.
As shown in Figure 5, touch bridge bracket 6 and in synchronization zone 7, be provided with a sheet metal 14.This sheet metal 14 links to each other by surrounding die casting with the remainder that touches bridge bracket 6.Sheet metal 14 usefulness X5Gni steel are made in this embodiment.Also can adopt other metals, for example aluminium.High-abrasive material herein is a kind of metal.
Described as shown in Figure 6 high-abrasive material is made with a kind of plastics 15, and plastics 15 link to each other by bi-component die casting with the remainder that touches bridge bracket 6 in Fig. 6.The material of plastics especially can consider to adopt PA6T/6I (GF40%), perhaps PEEK.
Except Fig. 5 and fixing means shown in Figure 6, for example also can adopt additive method, other parts that make high- abrasive material 14,15 and touch bridge bracket 6 are by embedding and locking or be in the same place by bonding connection.
Adopt contactor of the present invention can guarantee to touch bridge bracket 6 in synchronization zone 7 through the material scaling loss after the switch times N less than 2% of contact coating layer thickness d.Part numerical value even can be less than 1%.
Described switchgear just illustrates certainly as the structure of contactor.It also can be used as relay (particularly power relay) or constitutes as isolating switch (promptly being used for rated voltage greater than 1000V).
Claims (9)
1. electromagnetic switchgear according to nominal load design, contactor particularly, it comprises at least one load contacts (1), this contact have fixed contact (2) but and movable contact bridge (3), but described movable contact bridge its contact coating (8) under the new product state has initial contact coating layer thickness (d), wherein said contact coating (8) under nominal load after the switching manipulation of certain number of times (N) by scaling loss, to touch bridge (3) and be contained in the touching bridge (3) and can lift on the bridge bracket (6) of touching in the synchronization zone (7) from a fixed contact (2), the wherein said bridge bracket (6) that touches is made with high-abrasive material in synchronization zone (7) at least, so in the scope of synchronization zone (7), touch bridge bracket (6) under nominal load, after the switching manipulation of certain number of times (N), its material scaling loss amount is 10% of initial contact coating layer thickness (d) to the maximum.
2. switchgear as claimed in claim 1 is characterized in that, described high-abrasive material is a kind of metal, particularly steel, for example the X5GNi steel.
3. switchgear as claimed in claim 1 is characterized in that, described high-abrasive material is a kind of plastics, particularly PA 6T/6I (GF40%), perhaps PEEK.
4. switchgear as claimed in claim 3 is characterized in that, described high-abrasive material links together by bi-component die casting with the remainder that touches bridge bracket (6).
5. as the described switchgear of claim 1,2 or 3, it is characterized in that described high-abrasive material links together by surrounding die casting with the remainder that touches bridge bracket (6).
6. as the described switchgear of claim 1,2 or 3, it is characterized in that described high-abrasive material links together by embedding and locking with the remainder that touches bridge bracket (6).
7. as the described switchgear of claim 1,2 or 3, it is characterized in that described high-abrasive material and the remainder that touches bridge bracket (6) are by bonding connection together.
8. as the described switchgear of above-mentioned each claim, it is characterized in that this equipment is furnished with a thrust measuring circuit (9), be used to measure total scaling loss amount of described contact coating (8).
9. switchgear as claimed in claim 8, it is characterized in that, have a fitting surface (12) and one and be positioned at this and assemble aspectant front end face (11), and on described front end face (11), be provided with a total scaling loss quantity display apparatus (11) that links to each other with described thrust measuring circuit (9).
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DE2000128559 DE10028559C1 (en) | 2000-06-09 | 2000-06-09 | Electromagnetic switching device, used as contactor, comprises contact with fixed contact pieces and moving contact bridge |
| DE10028559.7 | 2000-06-09 |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN1329343A true CN1329343A (en) | 2002-01-02 |
| CN1187770C CN1187770C (en) | 2005-02-02 |
Family
ID=7645222
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNB011214198A Expired - Fee Related CN1187770C (en) | 2000-06-09 | 2001-06-09 | Electromagnetic switch equipment, especially contactor |
Country Status (3)
| Country | Link |
|---|---|
| CN (1) | CN1187770C (en) |
| DE (1) | DE10028559C1 (en) |
| FR (1) | FR2810155B1 (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN100409386C (en) * | 2002-12-20 | 2008-08-06 | 西门子公司 | Method for determining the remaining service life of a switching device and corresponding assembly |
| CN110797234A (en) * | 2018-08-01 | 2020-02-14 | 比亚迪股份有限公司 | Relay with a movable contact |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE10260249B4 (en) * | 2002-12-20 | 2005-07-28 | Siemens Ag | Method and device for determining the remaining service life of a switching device |
Family Cites Families (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE3030702C2 (en) * | 1980-08-14 | 1984-08-09 | Brown, Boveri & Cie Ag, 6800 Mannheim | Electromagnetic contactor with a movable contact bridge support |
| DE4427006A1 (en) * | 1994-07-29 | 1996-02-01 | Siemens Ag | Method for determining the remaining service life of contacts in switchgear and associated arrangement |
| DE19603319A1 (en) * | 1996-01-31 | 1997-08-07 | Siemens Ag | Method for determining the remaining service life of contacts in switchgear and associated arrangement |
| DE19603310A1 (en) * | 1996-01-31 | 1997-08-07 | Siemens Ag | Method for determining the remaining service life of contacts in switchgear and associated arrangement |
| DE29701312U1 (en) * | 1997-01-28 | 1997-04-10 | Klöckner-Moeller GmbH, 53115 Bonn | Contact bridge bracket |
-
2000
- 2000-06-09 DE DE2000128559 patent/DE10028559C1/en not_active Expired - Fee Related
-
2001
- 2001-06-05 FR FR0107302A patent/FR2810155B1/en not_active Expired - Fee Related
- 2001-06-09 CN CNB011214198A patent/CN1187770C/en not_active Expired - Fee Related
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN100409386C (en) * | 2002-12-20 | 2008-08-06 | 西门子公司 | Method for determining the remaining service life of a switching device and corresponding assembly |
| CN110797234A (en) * | 2018-08-01 | 2020-02-14 | 比亚迪股份有限公司 | Relay with a movable contact |
| CN110797234B (en) * | 2018-08-01 | 2022-05-13 | 比亚迪股份有限公司 | Relay with a movable contact |
Also Published As
| Publication number | Publication date |
|---|---|
| FR2810155B1 (en) | 2005-09-02 |
| FR2810155A1 (en) | 2001-12-14 |
| CN1187770C (en) | 2005-02-02 |
| DE10028559C1 (en) | 2001-11-22 |
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| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
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| CF01 | Termination of patent right due to non-payment of annual fee |