CN105869964A - Implementation method for reducing short circuit protection time of electromagnetic release - Google Patents
Implementation method for reducing short circuit protection time of electromagnetic release Download PDFInfo
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- CN105869964A CN105869964A CN201510025501.XA CN201510025501A CN105869964A CN 105869964 A CN105869964 A CN 105869964A CN 201510025501 A CN201510025501 A CN 201510025501A CN 105869964 A CN105869964 A CN 105869964A
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- circuit
- release
- iron core
- short circuit
- protection time
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Abstract
The invention relates to an implementation method for reducing the short circuit protection time of an electromagnetic release. A release protection unit of the release comprises a U-shaped iron core, an auxiliary release coil, an armature, a release rod, a heating member, a bimetallic strip, and an auxiliary release coil power supply circuit. The method is characterized by changing the iron core from conventionally-used low-carbon steel material into silicon steel sheet material to increase the magnetic force generated by the U-shaped iron core, accelerate armature pulling, and shorten the short circuit instantaneous protection time; and adding the auxiliary release coil to the U-shaped iron core to shorten the protection time when under-voltage is large in the short circuit state, eliminate a part of the magnetic force during overloading, and maintain the overload protection properties. When short circuit happens, the U-shaped iron core generates a large magnetic force to attract the armature to drive an action of the release rod to disconnect the circuit. The method can effectively shorten the instantaneous protection time of electromagnetic release short circuit. When large-current short circuit happens in a circuit, a release mechanism can act before open phase and cut off the circuit more reliably and quickly.
Description
Technical field
The present invention relates to a kind of implementation method shortening the magnetictrip short-circuit protection time.
Background technology
Chopper is widely used a kind of terminal protection electrical equipment in electric terminal power distribution equipment, disconnected
The short-circuit instantaneous trip ability of road device is Key Performance Indicator, it is possible to ensure to occur in circuit short circuit
Rapid protection circuit during situation, does not affect other equipment.When circuit occurs short circuit phenomenon,
If circuit breaker tripping is not in time, namely can not cut off short circuit current before phase shortage, then can
Cause other busbar distribution loops that decompression phenomenon occurs, affect the properly functioning of other equipment.De-
Button device is the core component of chopper, the most traditional iron core within circuit breaker electric magnetic release
Usually low-carbon steel material, pcrmeability is less, causes circuit breaker short circuit instantaneous trip relatively slow,
Can not good protection circuit in some special distribution environment.
Summary of the invention
The key technical problem that the invention solves the problems that is exactly the electromagnetic trip protection improveing chopper
Unit mechanisms, shortens the short-circuit protection time.
Present invention solves the technical problem that and realized by below scheme:
As described in Figure 1, circuit breaker electric magnetic release three-phase is respectively arranged with a short circuit instantaneous trip protection list
Unit, mainly include U-shaped iron core, auxiliary tripping coil, armature, release lever, heater element,
Bimetal leaf and auxiliary tripping coil power supply circuit.
Described heater element is electrically connected in main circuit, and bimetal leaf is close to heater element, double
Sheet metal is made up of the metal material that the two-layer coefficient of expansion is different, abnormal the most electric when occurring in circuit
During stream, heater element produces heat and conducts to bimetal leaf, and bimetal leaf is due to degree of crook
Release lever lateral bend the most in the same direction, so that release lever action.
Described U-shaped iron core is fixed on heater element, when occurring abnormal short circuit current in circuit
Time, the magnetization of U-shaped iron core produces huge magnetic field and makes the rapid adhesive of armature, so that release lever moves
Make.U-shaped core material selects stalloy, has bigger magnetic relative to common low-carbon steel material
Conductance, the magnetic field force that the magnetic field force that under the same terms, stalloy produces produces than mild steel increases,
Captivation between the most U-shaped iron core and armature increases, and accelerates armature adhesive, thus shortens short circuit
Guard time.
Described auxiliary tripping coil is wrapped on U-shaped iron core, when circuit overloads, and auxiliary tripping
Coil can offset the magnetic field force of increase, maintains overload characteristic constant；When short circuit is under-voltage relatively
Time many, auxiliary tripping coil offset magnetic field power is the least, can accelerate armature adhesive, shortens protection
Time.
Described coil power supply circuit has two schemes, and scheme one is direct current supply, by three-phase voltage
Form through transformator, rectifier bridge and filter circuit thereof, obtain DC voltage supply auxiliary tripping line
Circle, produces stationary magnetic field；Scheme two is Alternating Current Power Supply, directly by the list with protective loop homophase
Phase voltage provides, and increases phase-shifting transformer and ensures auxiliary tripping coil and the homophase electricity of protective loop
The field synchronous that miscarriage is raw, but direction is the most contrary.
Use such scheme, the present invention compared with prior art, during circuit breaker short circuit instantaneous protection
Between effectively shortened, more safe and reliable cut-out short-circuit loop, do not affect other loops
Equipment properly functioning.
Accompanying drawing explanation
Fig. 1 is the structural representation of circuit breaker electric magnetic release protected location of the present invention.
In figure: 1, U-shaped iron core；2, auxiliary tripping coil；3, armature；4, release lever；5、
Heater element；6, bimetal leaf；7, support.
Fig. 2 is the U-shaped iron core of A phase and auxiliary tripping coil schematic diagram thereof.In figure: 1, U-shaped
Iron core；2, armature.
Fig. 3 is A phase auxiliary tripping coil DC power-supply circuit.
Fig. 4 is A phase auxiliary tripping coil ac power circuit.
Detailed description of the invention
The invention will be further described below in conjunction with the accompanying drawings.
Fig. 1 is the circuit breaker electric magnetic release short-circuit protection unit major part that the present invention implements
Perspective view, heater element 5 is welded on one end of support 7, is all electrically connected in
In major loop, bimetal leaf 6 is close to heater element 5, and U-shaped iron core 1 is fixed on heater element
On 5, auxiliary tripping coil 2 is wrapped in U-shaped iron core 1 both sides, described armature 3 and release lever
4 are positioned at U-shaped iron core 1 offside, drive release lever action during armature 3 adhesive.
As it is shown in figure 1, the short-circuit instantaneous protection of the circuit breaker electric magnetic release of present invention enforcement is special
Property mainly completed by U-shaped iron core 1 and armature 3, armature 3 and release lever 4 combine one
Rising, when chopper is in "on" position, be short-circuited in electric loop fault, electricity in loop
Stream instantaneous mutation, U-shaped iron core 1 produces huge electromagnetic field and makes armature 3 adhesive, and armature 3 is inhaled
Drive release lever 4 action to make breaker open operation while conjunction, thus reach the merit of short-circuit protection
Energy.
As in figure 2 it is shown, in order to strengthen the suction-combining force that U-shaped iron core 1 produces, the present invention uses
U-shaped core material is stalloy.Stalloy has higher pcrmeability compared with ordinary low-carbon steel,
Bigger electromagnetic field is produced when electric current is undergone mutation.U-shaped iron core increases auxiliary tripping line
Circle, when circuit overloads, auxiliary tripping coil can offset the magnetic field force of increase, maintains overload
Characteristic is constant；When short circuit under-voltage more time, auxiliary tripping coil offset magnetic field power is the least,
Armature adhesive can be accelerated, shorten guard time.
As it is shown on figure 3, a kind of auxiliary tripping coil DC power-supply circuit is by transformator T, rectification
Bridge D, filter capacitor C, current-limiting resistance RA and coil LA composition are (as a example by A phase, each
Phase auxiliary tripping coil DC power-supply circuit shares three-phase transformer and rectification circuit).
As shown in Figure 4, a kind of auxiliary tripping coil ac power circuit by phase-shifting transformer TA,
Current-limiting resistance RA and coil LA forms (as a example by A phase).
As in figure 2 it is shown, IA is A phase main circuit current, ILA is A phase auxiliary tripping coil electricity
Stream.When using Fig. 3 mode to power, A phase auxiliary tripping coil produces a D.C. magnetic field.
Assume that switching former short-circuit protection value is set as 15In (In is switch rated current), when IA dashes forward
When becoming 12In overload, owing to core material has changed stalloy, the alternation that IA sudden change produces into
The sufficient armature movement that allowed in magnetic field, but owing to adding the constant magnetic that auxiliary tripping coil ILA produces
, with IA produce alternating magnetic field superimposed after, serve negative function, at this moment produce
Electromagnetic force is not enough so that armature movement, maintains former switch protection characteristic constant.When IA suddenlys change
During for 15In short circuit, IA produces huge alternating magnetic field, simultaneously because main circuit short circuit is led
Cause under-voltage is more, so that ILA reduces more, the stationary magnetic field that ILA produces also reduces
A lot.At this moment electromagnetic field mainly produces huge alternating magnetic field based on IA, thus strengthens
The U-shaped iron core the suction-combining force to armature, makes armature accelerate motion, and shortens the short-circuit protection time.
When using Fig. 4 mode to power, A phase auxiliary tripping coil generation one is Tong Bu with IA,
The alternating magnetic field of opposite in phase.Its operation principle and the mode of employing stationary magnetic field recited above
Identical, play the negative function in magnetic field equally, magnetic field the most at this moment is reverse alternating magnetic field
?.
Claims (4)
1. the implementation method shortening the magnetictrip short-circuit protection time, it is characterised in that:
This magnetictrip three-phase respectively fills a protected location, mainly includes U-shaped iron core, auxiliary tripping line
Circle, armature, release lever, heater element, bimetal leaf and auxiliary tripping coil power supply circuit.
The most according to claim 1 a kind of shorten magnetictrip short-circuit protection time
Implementation method, it is characterised in that: described U-shaped core material is high-permeability material, U-shaped
Increase auxiliary tripping coil on iron core, shorten the magnetictrip short-circuit protection time.
The most according to claim 1 a kind of shorten magnetictrip short-circuit protection time
Implementation method, it is characterised in that: a kind of auxiliary tripping coil power supply mode is direct current supply, directly
Stream voltage is provided by three-phase alternating voltage rectifying and wave-filtering.
The most according to claim 1 a kind of shorten magnetictrip short-circuit protection time
Implementation method, it is characterised in that: a kind of auxiliary tripping coil power supply mode is same by protective loop
Phase single-phase AC voltage is powered.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510025501.XA CN105869964A (en) | 2015-01-19 | 2015-01-19 | Implementation method for reducing short circuit protection time of electromagnetic release |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510025501.XA CN105869964A (en) | 2015-01-19 | 2015-01-19 | Implementation method for reducing short circuit protection time of electromagnetic release |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN105869964A true CN105869964A (en) | 2016-08-17 |
Family
ID=56623027
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201510025501.XA Pending CN105869964A (en) | 2015-01-19 | 2015-01-19 | Implementation method for reducing short circuit protection time of electromagnetic release |
Country Status (1)
| Country | Link |
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| CN (1) | CN105869964A (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109243935A (en) * | 2018-11-28 | 2019-01-18 | 北京明日电器设备有限责任公司 | A kind of guide tracked small-size moulded case circuit breaker |
| CN115877197A (en) * | 2022-12-17 | 2023-03-31 | 武汉杭久电气有限公司 | Detection device for circuit breaker |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN200993945Y (en) * | 2006-12-15 | 2007-12-19 | 大全集团有限公司 | Trip release device for circuit breaker |
| JP2008305680A (en) * | 2007-06-07 | 2008-12-18 | Kawamura Electric Inc | Electromagnet device of circuit breaker |
| CN201421812Y (en) * | 2009-05-19 | 2010-03-10 | 无锡唯特电气技术有限公司 | Combined electromagnetic tripper |
| CN102347176A (en) * | 2011-09-19 | 2012-02-08 | 广东天富电气集团有限公司 | Working method of electromagnetic tripping device |
| CN203250706U (en) * | 2013-04-12 | 2013-10-23 | 施耐德电器工业公司 | Magnetic tripping mechanism |
-
2015
- 2015-01-19 CN CN201510025501.XA patent/CN105869964A/en active Pending
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN200993945Y (en) * | 2006-12-15 | 2007-12-19 | 大全集团有限公司 | Trip release device for circuit breaker |
| JP2008305680A (en) * | 2007-06-07 | 2008-12-18 | Kawamura Electric Inc | Electromagnet device of circuit breaker |
| CN201421812Y (en) * | 2009-05-19 | 2010-03-10 | 无锡唯特电气技术有限公司 | Combined electromagnetic tripper |
| CN102347176A (en) * | 2011-09-19 | 2012-02-08 | 广东天富电气集团有限公司 | Working method of electromagnetic tripping device |
| CN203250706U (en) * | 2013-04-12 | 2013-10-23 | 施耐德电器工业公司 | Magnetic tripping mechanism |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109243935A (en) * | 2018-11-28 | 2019-01-18 | 北京明日电器设备有限责任公司 | A kind of guide tracked small-size moulded case circuit breaker |
| CN115877197A (en) * | 2022-12-17 | 2023-03-31 | 武汉杭久电气有限公司 | Detection device for circuit breaker |
| CN115877197B (en) * | 2022-12-17 | 2023-07-14 | 武汉杭久电气有限公司 | Detection device for circuit breaker |
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| C06 | Publication | ||
| PB01 | Publication | ||
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| WD01 | Invention patent application deemed withdrawn after publication | ||
| WD01 | Invention patent application deemed withdrawn after publication |
Application publication date: 20160817 |