CN1214421C - Method and device for reducing contact erosion of switchgear - Google Patents
Method and device for reducing contact erosion of switchgear Download PDFInfo
- Publication number
- CN1214421C CN1214421C CN 01814007 CN01814007A CN1214421C CN 1214421 C CN1214421 C CN 1214421C CN 01814007 CN01814007 CN 01814007 CN 01814007 A CN01814007 A CN 01814007A CN 1214421 C CN1214421 C CN 1214421C
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- China
- Prior art keywords
- main contact
- angle
- phase
- time
- scaling loss
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Classifications
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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
- H01H9/54—Circuit arrangements not adapted to a particular application of the switching device and for which no provision exists elsewhere
- H01H9/56—Circuit arrangements not adapted to a particular application of the switching device and for which no provision exists elsewhere for ensuring operation of the switch at a predetermined point in the ac cycle
- H01H9/563—Circuit arrangements not adapted to a particular application of the switching device and for which no provision exists elsewhere for ensuring operation of the switch at a predetermined point in the ac cycle for multipolar switches, e.g. different timing for different phases, selecting phase with first zero-crossing
-
- 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
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
- H01H11/00—Apparatus or processes specially adapted for the manufacture of electric switches
- H01H11/0062—Testing or measuring non-electrical properties of switches, e.g. contact velocity
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- Engineering & Computer Science (AREA)
- Power Engineering (AREA)
- Keying Circuit Devices (AREA)
- Relay Circuits (AREA)
- Driving Mechanisms And Operating Circuits Of Arc-Extinguishing High-Tension Switches (AREA)
Abstract
The invention discloses a method for reducing contact erosion of a switchgear, especially a contactor, and a device for realizing the method. In order to reduce contact erosion of a switchgear (1), in particular a contactor, a switching command (ES) is delayed until a command angle (PSI Kv), related to a phase angle (PSI) of a control voltage (US) of a magnetic system (4) coupled to a main contacts (K1 to K3) of the switchgear, is reached, which is associated with the main contact (K1, K2, K3) that currently has the greatest erosion. A plurality of analysing and processing units (ALn) for determining the contact erosion (DELTA mn), a memory unit (10) for storing the determined command angle (PSI Kv) and a phase comparator (11) for camparing the preferred command angle (PSI Kv) with the phase angle (PSI) of the determined control voltage (US) to generate an impulse (S) for starting the switch process, are provided.
Description
Technical field
The present invention relates to a kind of method that is used to reduce the pitting of contacts of switching device, especially contactor.The invention still further relates to the device of this method of realization.
Background technology
For with the switching device of alternating current control and Electromagnetically-operating (its main contact mechanism after this being known as main contact is used to connect three-phase electrical power system), attempt to reduce pitting of contacts, thereby improve the useful life of this switching device by suitable operation.So, improved the life-span thus by avoiding so-called switch pull(ing) effect can on three main contacts of routine, reach the scaling loss of same degree.In the coil wiring of switching device or contactor, a capacitor (Kapazit t) is set for this reason.In addition, by avoiding the so-called of this switching device can improve the pitting of contacts uniformity of being pursued synchronously automatically.For this reason, can postpone to connect order, make that connecting the angle evenly distributes by a certain definite method.
No matter be in order to compensate automatic pull(ing) effect, still in order to compensate the mechanical synchronization effect that produces by foozle, can be by selecting to connect the scaling loss burden that alleviates the most severe main contact of scaling loss at that time constantly suitably.So, the burden of other two main contacts, make their scaling loss be tending towards even thus equally.
Summary of the invention
The technical problem to be solved in the present invention provides a kind of method that is used to reduce the pitting of contacts of switching device, especially contactor, utilize the method can reduce on the one hand especially the inconsistent scaling loss of the main contact that causes synchronously by switch, reduce total scaling loss of all three main contacts of switching device on the other hand.In addition, also should provide a kind of device that is specially adapted to realize this method.
With regard to this method, above-mentioned technical problem of the present invention solves by a kind of method that is used to reduce contact erosion of switchgear, wherein, the connection order that is applied for this switching device main contact of Electromagnetically-operating, be used to guide a switching process be deferred to the phase angle of the control voltage that reaches a magnetic system that couples with described main contact relevant, carried out during the most severe main contact institute configure order angle of scaling loss at that time.Therefore, in a switching device, receive one connect order after, this connections order be deferred to reach one to the favourable phase angle of the most severe main contact of scaling loss at that time or order the angle.At this, this order angle or connect the order angle be one definite, be used for relevant moment of phase place of control voltage or coil voltage of Electromagnetically-operating main contact.At this, this connection order angle considered with its have dependence, contact the required time from the contact that to switching device, applies coil voltage or control voltage to each main contact with magnetic system that main contact couples.
The present invention is based on such starting point: have the moment or the order angle of three-favour in the cycle at per half electrical network, carve at this moment a switching process the total scaling loss that produces on all three main contacts from statistical average less than any other constantly or the scaling loss that is produced during the order angle of any other equal distribution.So can have main contact to the switching process of carving at this moment or introduce at this order angle for each favourable moment or order angle just in time dispose one than other two littler scaling loss assembly averages of main contact.Attachment relationship between this favourable moment or order angle and the contact is a univocality, thereby also just in time disposes a favourable order angle for each main contact or main contact mechanism.There are two fundamental characteristics at each favourable order angle: the scaling loss minimum that promptly makes on the one hand a certain definite main contact; Selecting this favourable and when only attaching troops to a unit order angle in a main contact on the other hand, its to the scaling loss assembly average of all contacts all than little during other order angle arbitrarily at one.
This delay for example can realize by the delay network of a discrete realization or by a microcontroller.Because all there is the order angle of three-favour in per half electrical network cycle or constantly, then this delay is 180 ° to the maximum on the whole, this is equivalent to time of delay of 10ms during for 50Hz at mains frequency.Like this, can guarantee that the switch of avoiding all is synchronous on the one hand, then reduce the accumulation scaling loss of all three main contacts or main contact mechanism on the other hand.
The actual scaling loss of three main contacts is preferably determined by the measurement to the time interval during the disconnection process.At this, measure from the time interval of main contact between separating that be separated to of the magnetic system of Electromagnetically-operating main contact and measure.At this, the separation of magnetic system can record by the character voltage pulse on the affiliated solenoid.Its size of the same generation of the separation of main contact is equivalent to the potential pulse of the anode-cathode voltage of formed electric arc at least.A kind of time interval measurement so for example is described in German patent application prospectus DE 19603310A1 and DE 19603319A1.This time interval measurement has utilized such understanding: thus the scaling loss of main contact shows as the stroke that reduces to show as shortening of contact thickness at first.
With regard to device, above-mentioned technical problem of the present invention is used to realize that by a kind of the device of said method of the present invention solves, and this device has
-a plurality of analyzing and processing parts that are used for the scaling loss of definite described each main contact of switching device,
-one memory unit is wherein stored the relevant order angle of control voltage phase angle of the magnetic system of a plurality of and described switching device,
-one phase comparator, by will be at that time the phase angle of the most severe main contact institute configure order angle of scaling loss and the magnetic system control voltage that records compare the pulse that produces a guide switch process,
-one that be connected with described analyzing and processing parts, as to be used for the most severe main contact of definite scaling loss at that time functional unit.
So this device has the analyzing and processing parts of the scaling loss of a plurality of each main contact that is used for determining this switching device.For this reason, each analyzing and processing parts carries out time interval measurement according to the voltage on voltage on each main contact and magnetic system solenoid.The order angle of the three-favour relevant with the phase angle (attaching troops to a unit in three phases of electric power system) of the coil voltage of switching device magnetic system or control voltage is stored in the memory module in suitable tabulation mode.
Phase comparator by will be at that time the most severe main contact institute configure order angle of scaling loss or phase angle and the magnetic system that recorded the at that time phase angle of controlling voltage compare the pulse that produces a guide switch process.Wherein, the pulse train of the pulse that is produced is sent with the interval in half electrical network cycle.One is right after circuits for triggering after this phase comparator, is preferably pulse that a trigger utilizes this phase comparator to produce and transmits to a switch and connect order, in order to apply control voltage or coil voltage to magnetic system.For the phase angle of the control voltage that obtains recording with preferred continuation mode, this phase comparator is connected with a phase output terminal that is connected on one of three phase network phase line of this switching device.
The advantage that the present invention reached especially is: thereby by postponing by on purpose influencing one with alternating current switching process control, Electromagnetically-operating switching device (especially contactor), utilize its ins and outs, avoid pull(ing) effect on the one hand, reduced the scaling loss of main contact on the other hand on the whole.At this, no matter be the main circuit of connecting by main contact, or the variation of this switching device itself is all avoided.
Description of drawings
Below in conjunction with accompanying drawing embodiments of the present invention are elaborated:
Fig. 1 shows a basic circuit diagram that has the switching device that reduces the pitting of contacts structure;
Fig. 2 shows closing time and the dependence of connecting order angle (Einschaltkommando-winkel) with angle/time diagram;
Fig. 3 shows closing speed and the dependence of connecting the order angle with angle/hodograph;
Fig. 4 shows lifting the duration (Abhebe-dauer) and connecting the dependence of ordering the angle of switching device main contact with angle/time diagram;
Fig. 5 illustrates main contact dwell angle and the dependence of connecting the order angle with angle/angle;
Fig. 6 illustrates relative vibrational loading (Prellladung) and connects the dependence of ordering between the angle with another width of cloth.
In institute's drawings attached, corresponding parts have each other been adopted identical Reference numeral.
Embodiment
Fig. 1 shows a contactor, it is a switching device 1 that is called the main contact mechanism of main contact K1 to K3 below having, rest(ing) contact K1a, the K2a of this main contact mechanism and the end of K3a are connected with the line end 2 that joins of three phase network L1, a L2, L3, N, and the other end is connected with a load 3.Moving contact K1b, the K2b of main contact K1 to K3 and K3b are operated by a shared magnetic system that has a solenoid 4.An end that is somebody's turn to do the solenoid 4 that mechanically couples mutually with main contact K1 to K3 is connected with the line end 2 that joins of phase line L3 through a pilot 5, and the other end is connected with the terminals 2 of center line N.A switch 6 that is used to control solenoid 4 is arranged on pilot 5, thereby operate, promptly switch on and off the magnetic system of this switching device 1.
For each main contact K1 to K3 has disposed an analyzing and processing components A that is used to measure the pitting of contacts of each main contact K1 to K3
L3, A
L2, A
L1, these analyzing and processing components A of one side
L3, A
L2, A
L1Each measure lead 7 service voltage U by separately main contact K1 to K3 through first
1, U
2, U
3, measure control voltage or the coil voltage U that lead 8 receives on the solenoid 4 through second on the other hand
sBy these voltage U
1, U
2, U
3And U
s, the analyzing and processing components A
L3, A
L2, A
L1Carry out time interval measurement, thereby determine the amount of the scaling loss at that time Δ m of main contact K1 to K3
1, Δ m
2, Δ m
3, i.e. the thickness at that time of the residue contact coating of main contact K1 to K3.
By the measured amount of scaling loss at that time Δ m
1, Δ m
2, Δ m
3In a functional unit 9 according to a predetermined functional relation, for example according to a so-called maximal index (Max-index) function, main contact K1, the K2 or the K3 that determine to have maximum scaling loss.Deposit three by one in the tabulation mode and connect order angle Ψ
K1, Ψ
K2, Ψ
K3Memory module 10, obtain the order angle Ψ that following switching process is played a decisive role
Kv, and send it to phase comparator 11.
Describe how to derive favourable order angle Ψ in detail below in conjunction with accompanying drawing 2 to 6 from the switching device of Electromagnetically-operating or the switch performance of contactor 1
KvAs example, provide the connection process through the measurement confirmation of a 37kw contactor here.
Fig. 2 shows closing time t
SWith connection order angle Ψ
KBetween dependence.This closing time is for controlling voltage or coil voltage U from applying
SArrive the time of contact K1a to the K3b contact of main contact K1 to K3.Here connect order angle Ψ
KBe and sinusoid control voltage or contactor coil voltage U
SThe relevant phase angle of phase place.From curvilinear motion as can be seen, with connection order angle Ψ
KRelevant closing time t
SNot constant, but standing a fluctuation greater than 10ms.This is equivalent to the angle Ψ greater than 180 ° when mains frequency 50Hz
K
For Ψ
K≈ n*180 °, n ∈ N wherein, closing time t
SThe shortest.Its reason is: the instantaneous DC component that causes a maximum when almost being only inductive electromagnetic coil or contactor coil 4 is being connected in the there, and this produces a higher suction power on the whole.Connecting order angle Ψ
KDuring for constant, this closing time t
SStand statistical fluctuation hardly.So learning order angle Ψ
KSituation under, can accurately determine closing time t
SReach the closing moment of main contact K1, K2, K3.To this, importantly, though the closing time t of all three main contact K1, K2, K3
SConstant, however because phase shift in three-phase electrical power system, the dwell angle relevant with line voltage separately in three main contact K1, K2, K3 staggers respectively in the connection process 120 °.
Fig. 3 shows closing speed v
S(being the speed that main contact K1, K2, K3 collide each other) and connection order angle Ψ
KBetween relation.This closing speed v
SWith closing time t
SThe same, depend on and connect order angle Ψ
KYet with closing time t
SDifferent is this closing speed v
SVariation obviously relevant with the structure situation of each contactor or switching device 1, therefore in fact can't draw common effective conclusion.In addition, closing speed v
SConnecting order angle Ψ
KStand a statistic scattering during for constant, this is by causing corresponding to the determined error band of the standard deviation that records.However, the closing speed of all three main contact K1, K2, K3 much at one, this in this only figure, obtain the reflection.
Fig. 4 shows all three main contact K1, K2, K3 and lift duration t during so-called connection vibration
AbWith connection order angle Ψ
KBetween relation.At this, this lifts duration t
AbBe that main contact K1, K2, K3 are being in the accumulated time that is separated from each other after the contact for the first time once more.At this moment, can produce the electric arc that scaling loss is played a decisive role between the contact K1a to K3b of main contact K1 to K3.
Comparison diagram 3 and Fig. 4 can find out closing speed v
SWith lift duration t
AbBetween definite relation.According to this, high closing speed v
SWhat also can cause a corresponding length lifts duration t
AbSo, also for considering the closing speed v of all three main contact K1 to K3 to elastic collision with to the simplification of spring-quality system
SHas the substantially identical duration t that lifts when identical
AbThis can represent with following relational expression:
t
ab＝C*v
S(Ψ
K)
Wherein, C is the special-purpose constant of a switching device.
Except closing speed v
sThe relevant therewith duration t that lifts
AbOutward, the size of the current i that is flow through during the vibration of main contact K1 to K3 is lifted for scaling loss also plays a decisive role.This be since scaling loss and arc current i at the whole temporal direct ratio that is integrated into.In addition, be power with the special-purpose constant k in a contact usually according to this arc current of following relational expression i:
Δm＝C′*∫i
k(t)dt
Wherein, Δ m is the pitting of contacts amount, and C ' and k depend on the constant of main contact K1 to K3 characteristic (as its geometry and material) especially.
Though the first time of the contact K1a to K3b of main contact K1 to K3, contact almost took place on the absolute time yardstick simultaneously, but main contact K1, K2, the K3 electric dwell angle relevant with line voltage separately is different, along with the dislocation of the voltage in the three-phase electrical power system misplaces 120 ° for 120 ° too.This pass ties up among Fig. 5 and clearly shows, and shows three main contact K1, K2, K3 in the drawings by 360 ° of normalized dwell angles and connection order angle Ψ
KBetween dependence.Change curve shown in Figure 5 can utilize closing time t
SRepresent (wherein the control of contactor coil or solenoid 4 is relevant with phase line L3, and a dextrorotation three phase network system is connected on main contact K1, K2, the K3) by following equation:
In formula, T is the electrical network cycle, is generally 20ms.Ψ
SBe with each mutually or phase line L1, L2, the relevant dwell angle of L3.360 ° of Mod expression modulo operation, it is applied as divided by the remainder after 360 °.For example, when angle is 540 °=1.5*360 °, obtain 1.5 the factor divided by 360 °.Fractional part by 0.5 remainder as can be known is 180 °.
Draw thus, though main contact K1 to K3 lift duration t
AbIdentical substantially, but the electric current difference that in this lifts the time, flows through in principle.The electric current that flows through when vibration is lifted for main contact K1, K2, K3 is approximately:
Wherein, C " is a constant relevant with line voltage with load 3 to be connected.
Therefore, main contact K1, K2, K3 scaling loss have two factors, promptly on the one hand be to all main contact K1 to K3 all identical lift duration t
Ab, be size on the other hand to the different arc current i of all main contact K1 to K3 difference.This point also by illustrated in fig. 6, by the relative vibrational loading Q of experiment determined these three main contact K1, K2, K3 with connect order angle Ψ
KBetween the change curve of dependence represent very clearly.Here vibrational loading Q is meant the actual vibration load relevant with the rated current effective value relatively.
At relative vibrational loading Q shown in Figure 6 and connection order angle Ψ
KDependence in, control voltage U
SRelevant with phase line L3 once more.There, also represent the mean value of three relative vibrational loading Q with the * line of number marking as a supplement with one.This with * the line of number marking at about Ψ
K=50 ° and Ψ
KRespectively there is a minimum value that is starkly lower than the mean value of vibrational loading Q in=85 ° zone.So near the zone these minimum values is possible obtain favourable connection order angle Ψ
KThe zone.
As shown in Figure 6: the connection order angle favourable to phase line L1 is Ψ
K1=55 °, the connection order angle favourable to phase line L2 is Ψ
K2=80 °, the connection order angle favourable to phase line L3 is Ψ
K3=65 °.Its reason is: connect order angle Ψ for these
K, the relative vibrational loading Q of main contact K1, K2, K3 has local minimum respectively under it, and the intermediate value (Mittelwert) of the vibrational loading Q of all three main contact K1, K2, K3 is lower than mean value.If change the control phase, so control voltage or coil voltage U
SFor example with phase line L1 synchronised, then favourable connection order angle Ψ
KAlso do corresponding rotation.
So one is affected utilizing under its ins and outs condition like this by the connection process of contactor 1 alternating current control, Electromagnetically-operating generally, make it avoid the switch pull(ing) effect on the one hand, reduced the scaling loss of main contact K1, K2, K3 on the other hand generally.
Claims (9)
1. method that is used to reduce switching device (1) pitting of contacts, be this switching device main contact of Electromagnetically-operating (K1 wherein with one, K2, K3) the connection order (ES) that is applied, be used to guide a switching process be deferred to reach one with described main contact (K1, K2, the control voltage (U of the magnetic system that K3) couples (4)
S) phase angle (Ψ) relevant, the most severe main contact (K1, K2, K3) the institute configure order angle (Ψ of scaling loss at that time
Kv) time carries out.
2. in accordance with the method for claim 1, wherein, each main contact (determine by the time interval measurement during the disconnection process for K1, K2 by scaling loss at that time K3).
3. in accordance with the method for claim 2, wherein, as described time interval adopt measured from be used for the described main contact of Electromagnetically-operating (K1, K2, magnetic system K3) (4) be separated to described main contact (K1, K2, K3) time interval between separating.
4. according to each described method in the claim 1 to 3, wherein, at the most severe main contact of described scaling loss at that time (K1, K2, K3) institute configure order angle (Ψ
Kv) control voltage (U with the magnetic system (4) that records continuously
S) phase angle (Ψ) when consistent, the pulse (S) that produces a guide switch process.
5. device that is used for realizing each described method of claim 1 to 3, it has
-a plurality ofly be used for determining each main contact of described switching device (K1, K2, the analyzing and processing parts (A of scaling loss K3)
Ln),
-one memory unit (10) is wherein stored the control voltage (U of the magnetic system (4) of a plurality of and described switching device (1)
S) the relevant order angle (Ψ of phase angle (Ψ)
Kv),
-one phase comparator (11) is by inciting somebody to action the most severe main contact (K1, K2, K3) the institute configure order angle (Ψ of scaling loss at that time
Kv) control voltage (U with the magnetic system (4) that records
S) phase angle (Ψ) compare and the pulse (S) that produces a guide switch process,
-one and described analyzing and processing parts (A
Ln) be connected, be used for determining the most severe main contact (K1, K2, functional unit K3) (9) of scaling loss at that time.
6. according to the described device of claim 5, it has one and is serially connected in described phase comparator (11) circuits for triggering (13) afterwards, and these circuits for triggering utilize pulse (S) that this phase comparator (11) produces to be arranged on switch (6) on the pilot (5) of described magnetic system (4) to one and transmit and connect order (ES).
7. according to claim 5 or 6 described devices, wherein, described phase comparator (11) is for obtaining the control voltage (U of described continuous measurement
S) phase angle (Ψ), (one of L3) line end that joins (2) on is connected for L1, L2 to be connected the three phase network phase line with of described switching device (1).
8. according to the described device of claim 5, wherein, each analyzing and processing parts (A
Ln) (K3) the phase cross-over connection is to record the voltage (U of each main contact for K1, K2 with separately main contact on the one hand to measure lead (7) through first
n), on the other hand for measuring the control voltage (U of magnetic system (4)
S) be connected with the second measurement lead (8).
9. according to the described device of claim 5, wherein, the described pulse (S) that is produced by phase comparator (11) is sent with the interval in half electrical network cycle (T/2).
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DE10051161.9 | 2000-10-16 | ||
| DE2000151161 DE10051161C1 (en) | 2000-10-16 | 2000-10-16 | Switching device contact wear reduction method uses delay of switching command used for electromagnetic operation of main contacts |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN1446367A CN1446367A (en) | 2003-10-01 |
| CN1214421C true CN1214421C (en) | 2005-08-10 |
Family
ID=7659915
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 01814007 Expired - Fee Related CN1214421C (en) | 2000-10-16 | 2001-10-04 | Method and device for reducing contact erosion of switchgear |
Country Status (5)
| Country | Link |
|---|---|
| EP (1) | EP1327254B1 (en) |
| JP (1) | JP3828866B2 (en) |
| CN (1) | CN1214421C (en) |
| DE (2) | DE10051161C1 (en) |
| WO (1) | WO2002033716A1 (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103518245A (en) * | 2011-05-09 | 2014-01-15 | Abb技术有限公司 | Automatic acquisition of circuit breaker operating times for controlled switching |
Families Citing this family (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE102005035658B3 (en) * | 2005-07-29 | 2007-04-12 | Siemens Ag | Operation of switching device uses control device which receives switching command, determines phase position of load phase or voltage and determines time path for governing state of switch sets governing state according to same |
| DE102005043895B4 (en) * | 2005-09-14 | 2007-07-26 | Siemens Ag | Method for operating an electromechanically actuated switching device and operated according to this method switching device |
| DE102006014914B3 (en) * | 2006-03-30 | 2007-10-04 | Siemens Ag | Electromechanically operated switchgear operating method, involves supplying supply voltage to electromechanical drive and controlling drive by control device, where supply voltage is alternating voltage or rectified alternating voltage |
| EP1986203A1 (en) * | 2007-04-26 | 2008-10-29 | Siemens Aktiengesellschaft | Method to detect a contact isolation layer in a switching element having contacts and a switch having such a switching element |
| US20110062960A1 (en) * | 2009-09-15 | 2011-03-17 | Lenin Prakash | Device and method to monitor electrical contact status |
| WO2012072810A1 (en) * | 2010-12-02 | 2012-06-07 | Abb Research Ltd | Method and device for monitoring switching devices |
| US10141143B2 (en) * | 2014-11-06 | 2018-11-27 | Rockwell Automation Technologies, Inc. | Wear-balanced electromagnetic motor control switching |
| JP7049183B2 (en) * | 2018-05-23 | 2022-04-06 | 三菱電機株式会社 | Electric energy meter and electrical equipment |
| DE102021212854A1 (en) * | 2021-11-16 | 2023-05-17 | Siemens Aktiengesellschaft | Method and arrangement for determining the status of a switch |
Family Cites Families (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5440180A (en) * | 1992-09-28 | 1995-08-08 | Eaton Corporation | Microprocessor based electrical contactor with distributed contactor opening |
| DE4427006A1 (en) * | 1994-07-29 | 1996-02-01 | Siemens Ag | Method for determining the remaining service life of contacts in switchgear and associated arrangement |
| DE4434074A1 (en) * | 1994-09-23 | 1996-03-28 | Siemens Ag | Multipole contactor |
| 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 |
-
2000
- 2000-10-16 DE DE2000151161 patent/DE10051161C1/en not_active Expired - Fee Related
-
2001
- 2001-10-04 DE DE50112489T patent/DE50112489D1/en not_active Expired - Lifetime
- 2001-10-04 EP EP01987939A patent/EP1327254B1/en not_active Expired - Lifetime
- 2001-10-04 WO PCT/DE2001/003814 patent/WO2002033716A1/en active IP Right Grant
- 2001-10-04 CN CN 01814007 patent/CN1214421C/en not_active Expired - Fee Related
- 2001-10-04 JP JP2002537018A patent/JP3828866B2/en not_active Expired - Fee Related
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103518245A (en) * | 2011-05-09 | 2014-01-15 | Abb技术有限公司 | Automatic acquisition of circuit breaker operating times for controlled switching |
| CN103518245B (en) * | 2011-05-09 | 2015-12-23 | Abb技术有限公司 | The automatic acquisition of the circuit-breaker operating time of controlled switch |
Also Published As
| Publication number | Publication date |
|---|---|
| CN1446367A (en) | 2003-10-01 |
| DE50112489D1 (en) | 2007-06-21 |
| JP3828866B2 (en) | 2006-10-04 |
| EP1327254B1 (en) | 2007-05-09 |
| WO2002033716A1 (en) | 2002-04-25 |
| JP2004512637A (en) | 2004-04-22 |
| EP1327254A1 (en) | 2003-07-16 |
| DE10051161C1 (en) | 2002-03-07 |
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