CN104377644B - A kind of device for under-voltage releasing equipment - Google Patents
A kind of device for under-voltage releasing equipment Download PDFInfo
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- CN104377644B CN104377644B CN201410683218.1A CN201410683218A CN104377644B CN 104377644 B CN104377644 B CN 104377644B CN 201410683218 A CN201410683218 A CN 201410683218A CN 104377644 B CN104377644 B CN 104377644B
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Abstract
The present invention relates to a kind of device for under-voltage releasing equipment, including：The rectification circuit that is connected with external power grid, electromagnet coil, the armature controlled by the electromagnet coil, reduction voltage circuit, relay, sample circuit, main control module, the rated voltage that is stored with Ue and the strong magnitude of voltage for starting, for the virtual value and the pulsating dc voltage value that gather the output voltage and voltage cycle of the sample circuit to calculate external power grid voltage；It is suitable to reach the 80% of rated voltage Ue when the voltage of the external power grid, and the pulsating dc voltage is when reaching the magnitude of voltage of the strong startup, first control the normally opened contact to close, control the on-off circuit to turn on afterwards, after after the armature adhesive, then the normally opened contact is controlled to disconnect；If the voltage of the external power grid is less than the 50% of rated voltage Ue, the on-off circuit is controlled to disconnect.The electrical apparatus release adhesive is reliable, coil heating amount is small, interference rejection ability is strong, be applicable to the frequency conversion occasion such as generator.
Description
The application is Application No. 201210225139.7, and the applying date is on July 2nd, 2012, and invention and created name is " one
The divisional application of the application for a patent for invention of kind device for under-voltage releasing equipment and its method of work "
Technical field
The present invention relates to the device for under-voltage releasing equipment and its method of work of a kind of low-power consumption.
Background technology
Device for under-voltage releasing equipment is breaker, especially one of critical elements of frame-type circuit breaker.Under-voltage release be
When its terminal voltage is down to a certain prescribed limit, breaker is set to have a kind of electrical apparatus release of time delay or no-delay disconnection, when power supply electricity
Drops（It is even slow to decline）To in the range of the 70% to 35% of rated operational voltage, under-voltage release should be acted（Thread off
Device coil losing electricity, moving armature has back-moving spring to eject-thread off in coil）, under-voltage release is in supply voltage equal to dropout
Device rated operational voltage 35% when, under-voltage release should be able to prevent breaker closing；Supply voltage is equal to or more than 85%
During the rated operational voltage of under-voltage release, under the conditions of hot, breaker reliably closure should ensure that（Trip coil is obtained
Moving armature has coil electromagnetic force to overcome spring force to suck and keep certain torque-" adhesive " in electricity, coil, is that breaker can
Closing lock provides condition）.
The essence of undervoltage tripping, is to prevent that breaker subordinate electric equipment is operated in after electric current is excessive under under-voltage condition, electricity
The effective measures that device equipment self-heating is aggravated.
Existing device for under-voltage releasing equipment, the most relatively simple or imperfections of circuit design, is disturbing more serious occasion, especially
It is the breaker near intermediate frequency use occasion, and device for under-voltage releasing equipment therein is frequently subjected to intermediate frequency and disturbed and misoperation.Or
The occasion of marine generator frequency change, because frequency change causes device for under-voltage releasing equipment misoperation.The misoperation of device for under-voltage releasing equipment, makes
Into the mistake separating brake of breaker.
The content of the invention
It can quickly start the technical problem to be solved in the present invention is to provide one kind, and realize the device for under-voltage releasing equipment of low-power consumption
And its method of work.
In order to solve the above technical problems, the present invention provides a kind of device for under-voltage releasing equipment of low-power consumption, including：It is connected with external power grid
Rectification circuit, electromagnet coil, the armature that is controlled by the electromagnet coil；Reduction voltage circuit, its input and the rectification
The positive output end of circuit is connected, its output end is connected with the current input terminal of the electromagnet coil, and armature is maintained for providing
The voltage of adhesive；Relay, its a pair of normally opened contacts respectively with the output end of the rectification circuit and the electromagnet coil
Current input terminal is connected；On-off circuit, its current input terminal is connected with the current output terminal of the electromagnet coil；Sampling electricity
Road, the magnitude of voltage for detecting the rectification circuit output ripple direct current；Main control module, the rated voltage that is stored with Ue and strong startup
Magnitude of voltage, it is straight with the virtual value and the pulsation that calculate external power grid voltage for gathering the output voltage of the sample circuit
Stream magnitude of voltage；Suitable for reaching the 80% of rated voltage Ue when the voltage of the external power grid, and the pulsating dc voltage reach it is described
During the magnitude of voltage of strong startup, first control the normally opened contact to close, control the on-off circuit to turn on afterwards, treat the armature adhesive
Afterwards, then the normally opened contact is controlled to disconnect；If the voltage of the external power grid is less than the 50% of rated voltage Ue, control is described
On-off circuit disconnects.
The main control module is additionally operable to：Rising edge or trailing edge according to the output voltage for gathering the sample circuit are obtained
The frequency of the external power grid line voltage or cycle, to calculate the external power grid voltage effective value.The present invention first passes through the master
Magnitude of voltage and the cycle of module detection sampling are controlled, to obtain the accurate voltage effective value of outer net, and sample circuit is located at whole
After current circuit, the interference of the harmonic wave in outer net voltage can be effectively reduced, it is described more accurately to judge that outer net voltage has
Whether valid value reaches the 80% of rated voltage Ue, so the electrical apparatus release is also very suitable for applying to the occasion of different frequency, especially fits
Sum of fundamental frequencies rate is 20Hz~65Hz alternating voltage.So second technical problem can also be solved and being to provide a kind of anti-harmonic wave and being applicable
In the device for under-voltage releasing equipment of multi-frequency power supply.
The main control module can be the single-chip microcomputer of any model（MCU）, on-chip system（SOC）, CPLD, FPGA or ARM
And DSP.
Further, in order to preferably avoid interference of the harmonic wave in power network to electrical apparatus release, in the input of the rectification circuit
End sets an EMC（electromagnetic compatibility）Power-supply filter.EMC power-supply filters, also known as " electromagnetism is simultaneous
Capacitive filter ", is mainly used in instrument and meter, automation control system, shows for suppressing and eliminating industrial automation system
Strong electromagnetic and the electric spark interference of field, proofread and correct field instrumentation instrument, it is ensured that the safe and reliable operation of automation control system.
Further, in order that the magnet coil obtains high pressure, the last one start-up capacitance is set in the reduction voltage circuit input
C1, charging voltage is input ac voltageTimes（About 3 ~ 5 times of electromagnet coil rated operational voltage）.On-off circuit
Moment is connected, electric charge is all discharged by magnet coil on storage capacitor C1, reach the purpose of " strong to start " adhesive.
Further, in order that charging voltage on storage capacitor C1（VH）, power network pulsating volage is not influenceed（SP）Information.
For parsing line voltage cycle, harmonic wave, there is provided convenient.An isolating diode D1 is set in the sample circuit；Specifically connect
The mode of connecing is that the sample circuit includes：Frequency and cycle detection circuit, isolating diode D1, pulsating dc voltage sampling electricity
Road；The output end of the rectification circuit and the frequency and input, the anode of the isolating diode of cycle detection circuit
It is connected, the negative electrode of the isolating diode is connected with the input of the pulsating dc voltage sample circuit, reduction voltage circuit；It is described
Frequency and cycle detection circuit, the output end of pulsating dc voltage sample circuit are connected with the main control module.
Further, in order to need the occasion of delayed releasing to use, the main control module is a single chip circuit, its bag
Include：What is be connected with single-chip microcomputer is suitable to the BCD toggle switch of the setting control on-off circuit time delay turn-off time.
Further, in order to prevent pouring in down a chimney for VH voltages, the normally opened contact is on the other hand prevented to disconnect electromagnetism described in moment
The back-emf that iron coil is produced, protects reduction voltage circuit.The device for under-voltage releasing equipment also includes, diode a D2, the diode D2
Anode be connected with the output end of the reduction voltage circuit, its negative electrode is connected with the electromagnet coil input.
Further, the main control module, on-off circuit, the power pack of relay are all provided by the reduction voltage circuit.
The method of work of above-mentioned device for under-voltage releasing equipment, including：
1. after the device for under-voltage releasing equipment accessing external network power network, the main control module is detected by sample circuit and calculates outer
The virtual value of line voltage and the rectification circuit output ripple DC voltage value；
2. when the virtual value of the external power grid voltage reaches the 80% of described rated voltage Ue, the pulsating dc voltage
Reach it is described start by force magnitude of voltage when, the output end for being connected to the rectification circuit of the first control relay of the main control module
Normally opened contact closure between the current input terminal of electromagnet coil, current output terminal with the electromagnet coil is controlled again
Connected on-off circuit conducting, so that the electromagnet coil obtains electric, i.e. armature adhesive；
Then, control the normally opened contact to disconnect, i.e., the electricity for maintaining the armature adhesive is only provided by the reduction voltage circuit
Pressure；
3. when the external power grid voltage less than described rated voltage Ue 50%, then described in the master control module controls
On-off circuit disconnects, so that the electromagnet coil dead electricity, i.e. armature are ejected.
The present invention has advantages below：（1）By reduction voltage circuit, main control module, on-off circuit, relay cooperating,
Electrical apparatus release high voltage startup, low pressure is maintained, make electrical apparatus release adhesive reliable, coil heating amount is small, realizes low-power consumption；（2）Pass through
The strong start-up capacitance C1 of connection ensure that startup voltage, realize a hundred per cent armature adhesive；（3）By single-chip microcomputer and sample circuit
Detection to mains frequency, further obtains accurate virtual value, can guarantee that armature adhesive reaches enough rated voltages, and
The use occasion of electrical apparatus release is opened up；（4）Collection to mains frequency can be effective the interference for removing harmonic wave in power network, it is double with EMC
Coordinate to filter power supply wave filter, more can effectively avoid the harmonic wave in power network from disturbing.
Brief description of the drawings
In order that present disclosure is more likely to be clearly understood, below according to specific embodiment and with reference to accompanying drawing,
The present invention is further detailed explanation, wherein
Fig. 1 is the circuit structure diagram one of the device for under-voltage releasing equipment of anti-harmonic wave of the invention and full rate；
Fig. 2 is the circuit structure diagram two of the device for under-voltage releasing equipment of anti-harmonic wave of the invention and full rate.
Embodiment
Below in conjunction with the accompanying drawings and embodiment the present invention is described in detail：
The parameter designing of exchange shunt release of the invention meets low voltage switch equipment and control device standard：
GB14048.1-2006 and GB14048.2-2008 define the important technological parameters of device for under-voltage releasing equipment.In the requirement of the standard
Under, enumerate following examples and illustrate.
Embodiment 1
See Fig. 1, a kind of device for under-voltage releasing equipment, including：The rectification circuit 1 that is connected with external power grid, electromagnet coil 3, by described
The armature of the control of electromagnet coil 3；Reduction voltage circuit 2, its input is connected with the positive output end of the rectification circuit 1, its output
End is connected with the current input terminal of the electromagnet coil 3, and the voltage of armature adhesive is maintained for providing；Relay 4, it is a pair
Normally opened contact is connected with the output end of the rectification circuit 1 and the current input terminal of the electromagnet coil 3 respectively；On-off circuit
7, its current input terminal is connected with the current output terminal of the electromagnet coil 3；Sample circuit 6, for detecting the rectified current
The magnitude of voltage of the output ripple direct current of road 1；Main control module 8, the rated voltage that is stored with Ue and the strong magnitude of voltage for starting, for gathering
The output voltage of sample circuit 6 is stated to calculate the virtual value and the pulsating dc voltage value of external power grid voltage；It is suitable to work as institute
The voltage for stating external power grid reaches the 80% of rated voltage Ue, and the pulsating dc voltage is when reaching the magnitude of voltage of the strong startup,
First control the normally opened contact to close, control the on-off circuit 7 to turn on afterwards, after after the armature adhesive, then control it is described often
Open contact disconnection；If the voltage of the external power grid is less than the 50% of rated voltage Ue, the on-off circuit 7 is controlled to disconnect.
The main control module 8 is additionally operable to：Rising edge or trailing edge according to the output voltage for gathering the sample circuit 6 are obtained
Frequency or the cycle of the external power grid line voltage are obtained, to calculate the external power grid voltage effective value.
An EMC power-supply filters are set in the input of the rectification circuit 1.
The last one start-up capacitance C1 is set in the input of the reduction voltage circuit 2.
The sample circuit 6 includes：Frequency and cycle detection circuit 6-1, isolating diode D1, pulsating dc voltage are adopted
Sample circuit；Input of the output end of the rectification circuit 1 with the frequency and cycle detection circuit, the isolating diode D1
Anode be connected, the negative electrode of the isolating diode D1 and the pulsating dc voltage sample circuit, the input of reduction voltage circuit 2
It is connected；The frequency and cycle detection circuit, the output end of pulsating dc voltage sample circuit are connected with the main control module 8.
The main control module 8 is a single chip circuit, and it includes：What is be connected with single-chip microcomputer is suitable to the setting control switch
The BCD toggle switch of the delay turn-off time of circuit 7.
The device for under-voltage releasing equipment also includes that a diode D2, the anode of the diode D2 is defeated with the reduction voltage circuit 2
Go out end to be connected, its negative electrode is connected with the input of the electromagnet coil 3.
Embodiment 2
See Fig. 1-2, on the basis of embodiment 1, illustrate the embodiment of the device for under-voltage releasing equipment major part.
The voltage VH that all-wave pulsating volage is isolated after being charged to the strong start-up capacitance C1 from the isolating diode D1, no
Influence pulsating volage SP.VH voltages provide relay 4 and on-off circuit 7 described in the main control module 8 after having the step-down of reduction voltage circuit 2
Working power, the reduction voltage circuit 2 forms voltage VP after voltage VO isolates through diode D2 and powers for the electromagnet coil 3.
Resistance R1 and R2 constitutes the sampling circuit of VH, and sampled signal SH send the main control module 8.Pulsating volage after full-wave rectification, frequency
Rate and cycle detection circuit 6-1 formation INT/SA signals, the parsing of main control module 8 INT signal obtain the grid cycle time（Frequently
Rate）, SA is sampled in a cycle several times, using methods such as FFT, calculate " virtual value " of correspondence line voltage, foundation
Virtual value, when judging 80% more than nominal voltage, whether the main control module 8 determines whether voltage VH while having reached one
Definite value.When this two conditions all meet, the control relay make contact of the main control module 8 1.-be the electromagnet 2.
Coil 3 provides a startup voltage high, and then, the main control module 8 controls the on-off circuit 7 to connect the electromagnet coil
3, the electromagnet coil 3 realizes strong startup.After strong start completion, it is tactile that the main control module 8 controls the relay 4 to disconnect
Put 1. -2., voltage VP maintains the certain torque of electromagnet coil 3.When virtual value less than nominal voltage 50%, the master
Control the reset bullet inside the electric current that module 8 controls the on-off circuit 7 to disconnect the electromagnet coil 3, the electromagnet coil 3
Spring ejects armature, armature top circuit breaker self-locking mechanism, realizes the separating brake of breaker.
Isolating diode D1 is set after full-wave rectification so that the charging voltage on the strong start-up capacitance C1（VH）,
Power network pulsating volage is not influenceed（SP）Information.It is parsing line voltage cycle, harmonic wave, there is provided convenient.
In the present invention, the leading make contact of the relay 4 1. -2., the startup voltage of electromagnet is as described to open by force
The charging voltage of dynamic condenser C1（VH）, it is input ac voltageTimes（It is the rated operational voltage of the electromagnet coil 3
Several times）.The on-off circuit 7 connects moment, and electric charge is all released by the electromagnet coil 3 on the strong start-up capacitance C1
Put, reach the purpose of " strong to start " adhesive.The power of strong startup, the strong start-up capacitance C1 capacity is minimum except reduction voltage circuit is met
It is required that outside, can also further it be optimized by suitably increasing the capacitance of the strong start-up capacitance C1.
In the present invention, the current input terminal of the electromagnet coil 3 is fixedly connected voltage VP in advance, prevents contact 1. -2.
Transition period, the electromagnet coil 3 loses voltage and voluntarily disconnected.After electromagnet coil the last 3 starts, by voltage
VP maintains the prime power of the electromagnet coil 3, meets the requirement of the low power run of electromagnet coil 3, both realized
High-torque starts, and causes that device for under-voltage releasing equipment entirety caloric value is small again, and its circuit structure is simple.
In the present invention, the output voltage VO of reduction voltage circuit 2 forms VP to the electromagnet after isolating through the diode D2
Coil 3 is powered, and on the one hand the diode D2 prevents pouring in down a chimney for VH voltages, on the other hand prevents contact 1. -2. disconnect moment institute
The back-emf of the generation of electromagnet coil 3 is stated, reduction voltage circuit is protected.
In the present invention, input voltage is through full-wave rectification, the backward strong startup C1 chargings of isolating diode D1 isolation,
There is generation 5V, 12V and VO voltage of reduction voltage circuit.This three groups of voltages, the frequency, harmonic wave with input voltage is unrelated.
In the present invention, the main control module 8 judges INT signal, obtains grid cycle（Frequency）.SA signal meters are parsed simultaneously
The virtual value of line voltage is calculated, virtual value is corresponding with the cycle.According to virtual value, when judging 80% more than nominal voltage, institute
Whether state main control module 8 determines whether VH while having reached certain value.When this two conditions are all met, the main control module
1. 8 control the make contacts of relay 4-and it is that the electromagnet coil 3 provides a startup voltage high 2., it is then, described
Main control module 8 controls the on-off circuit 7 to connect the electromagnet coil 3, and the electromagnet coil 3 realizes strong startup, really
A hundred per cent adhesive is protected.
Embodiment 3
Fig. 1-2 is seen on the basis of embodiment 1-2, with 220V voltages, the main control module 8 using single chip circuit 8-1
As a example by, illustrate anti-harmonic wave, full rate device for under-voltage releasing equipment major part implementation method.
Line voltage is followed by 1 two inputs of the rectification circuit through EMC bidirectional filterings.The anode of the rectification circuit 1
It is defined as（VH）, negativing ending grounding（GND）.
After upper electricity, ac voltage rectifier is DC pulse moving voltage SP by the rectification circuit 1, through the isolating diode D1
Charged to the strong start-up capacitance C1, charging voltage VH is input ac voltageTimes（80% virtual value, is approximately equal to
248V）.This charging voltage has the voltage sampling circuit 6 that R1 and R2 is composed in series, production sampled signal SH feeding single-chip microcomputers.Voltage
VH powers to reduction voltage circuit.
The 12V that the reduction voltage circuit 2 is produced（15V）Used for the on-off circuit 7 with the relay 4, the 5V of generation
（3.3V）Used for single chip circuit 8-1, the VO of generation（30V）It is connected to the anode of the diode D2.The diode D2
Negative electrode connect one end of the electromagnet coil 3, and labeled as VP.
DC pulse moving voltage SP has sample circuit 6 to sample, and production output signal INT/SA send single-chip microcomputer.Single chip circuit 8-
On the one hand 1 open rising edge（Or trailing edge）Interrupt, parsing INT signal obtains the grid cycle time（Frequency）, on the other hand exist
Sampling SA signals 32 times in a cycle（Or 64 times）, using methods such as FFT, " virtual value " of correspondence line voltage is calculated,
According to virtual value, when judging 80% more than nominal voltage, whether single chip circuit 8-1 determines whether VH while having reached one
Definite value（Such as larger than 240V）.When this two conditions are all met, 1. single chip circuit 8-1 controls the make contact of relay 4
- it is that the electromagnet coil 3 provides a startup voltage high, time delay 2.（100ms）Afterwards, single chip circuit 8-1 controls are described
On-off circuit 7 connects the electromagnet coil 3, and the electromagnet coil 3 realizes strong startup.After strong start completion, continue to prolong
When（100ms）, 1. single chip circuit 8-1 control the break contact of relay 4-and 2., VP maintains the electromagnet coil 3 one
Determine torque.When virtual value is less than nominal voltage（That is rated voltage）50% when, single chip circuit 8-1 controls the on-off circuit 7
The electric current of the electromagnet coil 3 is disconnected, the back-moving spring inside the electromagnet coil 3 ejects armature, and armature top is cut-off
Road device self-locking mechanism, realizes the separating brake of breaker.
Single chip circuit 8-1 includes the auxiliary circuit including toggle switch, is needing the occasion of delayed releasing, sets different
Toggle switch combination, single-chip microcomputer read after this signal, determines the delay time of delayed releasing.Such as three binary-coded decimal toggle switch,
Time delay 0 second, 1 second, 2 seconds, 3 seconds, 4 seconds, 5 seconds, 10 seconds, 20 seconds, or other time values are represented respectively.Time delay in wherein 0 second is represented
（Not time delay）" instantaneous to disconnect ", represents that delay disconnects again after 10 seconds after input voltage is less than the 50% of Ue for 10 seconds.
Embodiment 4
On the basis of embodiment 1-3, the main control module 8, its resolve correspondence line voltage " virtual value " method be,
In a cycle, by cycle time divided by 32, the sampling time is obtained,（For example, mains frequency 50Hz, cycle time is 20ms,
It is divided into 2 positive half-waves after full-wave rectification, each positive half-wave cycle is 10ms.10ms/32==0.3125ms=312us）, by this
Interval time carries out pointwise sampling, forms 32 points of database.
" virtual value " of specific corresponding to line voltage can be further calculated by following two methods：
Method one, using fft algorithm（Fourier algorithm）, with 32 point data bases " extraction " primary wave（Fundamental wave）, use fundamental wave
Judge whether more than 80%；The algorithm is to anti-interference rear complicated wave form, and the effect for especially resisting the waveform of severe jamming is preferable.
Method two, using rms algorithm, i.e.,；Wherein ui is the maximum of input ac voltage, and this is most
Big value can be compensated with the used sampled signal for being input to the main control module 8 and obtained；The dry higher hamonic wave of algorithm confrontation is not
Serious waveform（THD total harmonic distortions are less than 15%）, effect ideal.
Embodiment 5
See Fig. 1-2, on the basis of embodiment 1-4, the device for under-voltage releasing equipment method of work of a kind of anti-harmonic wave and full rate, bag
Include：
1. after the device for under-voltage releasing equipment accessing external network power network, the main control module 8 is detected and calculated by sample circuit 6
The virtual value of external power grid voltage and the output ripple DC voltage value of the rectification circuit 1；
2. when the virtual value of the external power grid voltage reaches the 80% of described rated voltage Ue, the pulsating dc voltage
When reaching the magnitude of voltage of the strong startup, the main control module 8 first control relay 4 is connected to the defeated of the rectification circuit 1
Go out the closure of the normally opened contact between end and the current input terminal of electromagnet coil 3, control electric current with the electromagnet coil 3 again
The connected on-off circuit 7 of output end is turned on, so that the electromagnet coil 3 obtains electric, i.e. armature adhesive；
Then, control the normally opened contact to disconnect, i.e., only provide the electricity for maintaining the armature adhesive by the reduction voltage circuit 2
Pressure；
3. when the external power grid voltage is less than the 50% of described rated voltage Ue, then the main control module 8 controls described
On-off circuit 7 disconnects, so that the dead electricity of the electromagnet coil 3, i.e. armature are ejected.
Obviously, above-described embodiment is only intended to clearly illustrate example of the present invention, and is not to the present invention
The restriction of implementation method.For those of ordinary skill in the field, it can also be made on the basis of the above description
The change or variation of its multi-form.There is no need and unable to be exhaustive to all of implementation method.And these belong to this hair
Obvious change that bright spirit is extended out or among changing still in protection scope of the present invention.
Claims (1)
1. a kind of device for under-voltage releasing equipment, including：The rectification circuit being connected with external power grid（1）, electromagnet coil（3）, by the electromagnetism
Iron coil（3）The armature of control；
Characterized by further comprising：
Reduction voltage circuit（2）, its input and the rectification circuit（1）Positive output end be connected, its output end and the electromagnet
Coil（3）Current input terminal be connected, for provide maintain armature adhesive voltage；
Relay（4）, its a pair of normally opened contacts respectively with the rectification circuit（1）Output end and the electromagnet coil（3）
Current input terminal be connected；
On-off circuit（7）, its current input terminal and the electromagnet coil（3）Current output terminal be connected；
Sample circuit（6）, for detecting the rectification circuit（1）Output ripple DC voltage value；
Main control module（8）, the rated voltage that is stored with Ue and the by force magnitude of voltage of startup, for gathering the sample circuit（6）It is defeated
Go out voltage to calculate the virtual value and the pulsating dc voltage value of external power grid voltage；When the voltage of the external power grid reaches volume
Determine the 80% of voltage Ue, and the pulsating dc voltage value reach it is described start by force magnitude of voltage when, first control the normally opened contact
Closure, controls the on-off circuit afterwards（7）Conducting, after after the armature adhesive, then controls the normally opened contact to disconnect；When described
When the voltage of external power grid is less than the 50% of rated voltage Ue, then the on-off circuit is controlled（7）Disconnect；
In the rectification circuit（1）Input set an EMC power-supply filters；
In the reduction voltage circuit（2）Input sets the last one start-up capacitance（C1）；
The sample circuit（6）Including：Frequency and cycle detection circuit (6-1), isolating diode（D1）, pulsating dc voltage adopts
Sample circuit；The rectification circuit（1）Input of the output end with the frequency and cycle detection circuit, the isolating diode
（D1）Anode be connected, the isolating diode（D1）Negative electrode and the pulsating dc voltage sample circuit, reduction voltage circuit（2）
Input be connected；The frequency and cycle detection circuit, the output end of pulsating dc voltage sample circuit and the master control mould
Block（8）It is connected.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410683218.1A CN104377644B (en) | 2012-07-02 | 2012-07-02 | A kind of device for under-voltage releasing equipment |
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410683218.1A CN104377644B (en) | 2012-07-02 | 2012-07-02 | A kind of device for under-voltage releasing equipment |
| CN201210225139.7A CN102768923B (en) | 2012-07-02 | 2012-07-02 | Undervoltage tripper and working method thereof |
Related Parent Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201210225139.7A Division CN102768923B (en) | 2012-07-02 | 2012-07-02 | Undervoltage tripper and working method thereof |
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| Publication Number | Publication Date |
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| CN104377644A CN104377644A (en) | 2015-02-25 |
| CN104377644B true CN104377644B (en) | 2017-07-11 |
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| CN201410683218.1A Expired - Fee Related CN104377644B (en) | 2012-07-02 | 2012-07-02 | A kind of device for under-voltage releasing equipment |
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| CN111640604A (en) * | 2020-05-28 | 2020-09-08 | 新驰电气集团有限公司 | Low-power-consumption control and protection switching device |
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| CN101630831A (en) * | 2009-08-03 | 2010-01-20 | 江苏国星电器有限公司 | Electromagnetic undervoltage release |
| CN101699683A (en) * | 2009-11-20 | 2010-04-28 | 常州工学院 | Undervoltage release |
| CN201498974U (en) * | 2009-07-21 | 2010-06-02 | 常熟开关制造有限公司(原常熟开关厂） | Under-voltage trip circuit |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| TWI335715B (en) * | 2006-09-15 | 2011-01-01 | Chimei Innolux Corp | Multiplexed dc voltage regulation output circuit |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN201498974U (en) * | 2009-07-21 | 2010-06-02 | 常熟开关制造有限公司(原常熟开关厂） | Under-voltage trip circuit |
| CN101630831A (en) * | 2009-08-03 | 2010-01-20 | 江苏国星电器有限公司 | Electromagnetic undervoltage release |
| CN101699683A (en) * | 2009-11-20 | 2010-04-28 | 常州工学院 | Undervoltage release |
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| Publication number | Publication date |
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| CN104377644A (en) | 2015-02-25 |
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