CN209448444U - A kind of power supply adaptor and protective device for self-powered microcomputer protecting device - Google Patents

Abstract

The utility model provides a kind of power supply adaptor and protective device for self-powered microcomputer protecting device, comprising: iron core and is wound in the primary circuit of the iron core, secondary circuit；It connects with the CT secondary circuit of self-powered microcomputer protecting device the primary circuit；The secondary circuit takes electric input port to connect with the electric current of the self-powered microcomputer protecting device.The utility model is connected by using primary circuit with CT secondary circuit; to the secondary current of power supply adaptor primary circuit input CT; power supply adaptor secondary circuit, which is exported, takes electric input as the electric current of microcomputer protecting device; the current adapter has good electrical characteristic; CT secondary current access current adapter primary circuit does not influence electric current accuracy; the secondary output of adapter takes electrical characteristics with good, so that self-powered microcomputer protecting device takes power supply more stable.Self-powered microcomputer protecting device provided by the utility model also has above-mentioned beneficial effect, and details are not described herein.

Description

A kind of power supply adaptor and protective device for self-powered microcomputer protecting device

Technical field

The utility model relates to high-tension apparatus, in particular to a kind of power supply adaptor for self-powered microcomputer protecting device And protective device.

Background technique

Currently, the outdoor electrics facility such as outdoor Europe change, outdoor ring main unit, prepackage type switch-box in electric system, due to Use environment is severe, and temperature is higher, and unattended.For the accessory power supply of relay protection by such environmental effects, spoilage is big, makes Defencive function is not had actually at common computer protective relaying device.

Relay protection accessory power supply: work, the tripping of common computer protective device need a power supply, independently of bus electricity Pressure, the device not influenced by busbar voltage provides.If directly meeting bus PT, bus loss of pressure when short trouble, bus PT is lost Pressure, microcomputer working power and the tripping equal decompression of power supply, defencive function do not work.Therefore commonly using direct current cabinet, UPS be used as after Electric protection accessory power supply.

WT-2039EP self-powered type microcomputer protecting device is developed exclusively for relay protection accessory power supply is not provided with, can To be suitable for the protection of the various equipment such as ring network cabinet, all insulation cabinet, breaker cabinet.With the characteristic phase overcurrent of various motion Protection, zero-sequence over-current protection and the direct trip avoidance function of external connector can be applied to the protection such as bus, route, distribution transformer field It closes.Perfect design can guarantee that device is long-term in the presence of a harsh environment, reliably runs.Self-powered type microcomputer protecting device is also known as Passive microcomputer protecting device.

The characteristic of power supply is taken to be influenced by self-powered microcomputer protecting device CT at present, CT Special electricity getting winding or measurement winding Secondary side is in half open circuit (electric current is minimum, and voltage is high), influences the operation of CT, and CT is needed to increase by one group of winding.(CT is not answered The idle running, idle running, which will cause iron core and be saturated for a long time, does not utilize safety), limit making for self-powered microcomputer protecting device With range, the reliability that self-powered type microcomputer protecting device CT takes power supply is also influenced.

Therefore, how to propose a kind of power source design for self-powered microcomputer protecting device, supply self powered supply and CT Electricity is more reasonably compatible with, and is improved respective service condition, is those skilled in the art's technical problem urgently to be resolved.

Utility model content

In view of this, the purpose of this utility model is to provide a kind of power adaptations for self-powered microcomputer protecting device Device and protective device carry out self powered supply more reasonably with CT power supply compatible, improve respective service condition.Its specific side Case is as follows:

On the one hand, the utility model provides a kind of power supply adaptor for self-powered microcomputer protecting device, comprising: iron core And it is wound in the primary circuit of the iron core, secondary circuit；

It connects with the CT secondary circuit of self-powered microcomputer protecting device the primary circuit；

The secondary circuit takes electric input port to connect with the electric current of the self-powered microcomputer protecting device.

Preferably, the iron core is microcrystalline iron core.

Preferably,

The number of turns of the primary circuit is set as full for iron core when flowing through the work starting current that the primary circuit reaches With the first presupposition multiple of electric current.

Preferably,

First presupposition multiple is 1.1 times.

Preferably,

The voltage that described secondary circuit the number of turns is set as the secondary circuit when the core sataration reaches Microcomputer Protection Device CT takes the second presupposition multiple of electric power initiation voltage.

Preferably,

Second presupposition multiple is 0.9 times.

Preferably,

The iron core includes: the first iron core, the second iron core；

The primary circuit includes: first sub-loop, second sub-loop；

The secondary circuit includes: secondary first sub-loop, secondary second sub-loop；

First sub-loop, second sub-loop are wound in first iron core；

Secondary first sub-loop, secondary second sub-loop winding and second iron core.

Preferably,

Second sub-loop, secondary second sub-loop pass through gating module and the self-powered Microcomputer Protection The electric current of device takes electric input port to connect.

Preferably, further includes: the shell with cavity；

The cavity places the iron core, the primary circuit, the secondary circuit；

The first electric connection point, the second electric connection point of the primary circuit are set to the lower part two sides of the shell；

Third electric connection point, the 4th electric connection point of the secondary circuit are set to the upper end of the shell.

On the other hand, the utility model provides a kind of self-powered microcomputer protecting device, and it is any described to be equipped with above-mentioned aspect The power supply adaptor for self-powered microcomputer protecting device.

The utility model provides a kind of power supply adaptor for self-powered microcomputer protecting device, comprising: iron core and twines It is around in primary circuit, the secondary circuit of the iron core；The CT secondary circuit of the primary circuit and self-powered microcomputer protecting device Series connection；The secondary circuit takes electric input port to connect with the electric current of the self-powered microcomputer protecting device.The utility model passes through It is connected using primary circuit with CT secondary circuit, thus the secondary current of power supply adaptor primary circuit (low-resistance) input CT, electricity Source adapter secondary circuit, which is exported, takes electric input as the electric current of microcomputer protecting device, which has good electrical Characteristic, CT secondary current access current adapter primary circuit do not influence electric current accuracy, and the secondary output of adapter has good Take electrical characteristics so that self-powered microcomputer protecting device takes power supply more stable.

Self-powered microcomputer protecting device provided by the utility model also has above-mentioned beneficial effect, and details are not described herein.

Detailed description of the invention

In order to illustrate the embodiment of the utility model or the technical proposal in the existing technology more clearly, below will be to embodiment Or attached drawing needed to be used in the description of the prior art is briefly described, it should be apparent that, the accompanying drawings in the following description is only It is the embodiments of the present invention, for those of ordinary skill in the art, without creative efforts, also Other attached drawings can be obtained according to the attached drawing of offer.

Fig. 1 is a kind of electricity for self-powered microcomputer protecting device provided by a kind of specific embodiment of the utility model The composed structure schematic diagram of source adapter；

Fig. 2 is a kind of electricity for self-powered microcomputer protecting device provided by a kind of specific embodiment of the utility model The shell composed structure schematic diagram of source adapter；

Fig. 3 is a kind of electricity for self-powered microcomputer protecting device provided by a kind of specific embodiment of the utility model The connection circuit diagram of source adapter；

Fig. 4 provides a kind of appearance signal of self-powered microcomputer protecting device for another specific embodiment of the utility model Figure；

Fig. 5 is the partial enlarged view of indicator lamp regions shown in Fig. 4；

Fig. 6 is the partial enlarged view of the first observation window shown in Fig. 4, breaker observation window；

Fig. 7 is the partial enlarged view of the second observation window shown in Fig. 4.

Specific embodiment

The following will be combined with the drawings in the embodiments of the present invention, carries out the technical scheme in the embodiment of the utility model Clearly and completely describe, it is clear that the described embodiments are only a part of the embodiments of the utility model, rather than whole Embodiment.Based on the embodiments of the present invention, those of ordinary skill in the art are without making creative work Every other embodiment obtained, fall within the protection scope of the utility model.

Referring to FIG. 1, Fig. 1 is that one kind provided by a kind of specific embodiment of the utility model is protected for self-powered microcomputer The composed structure schematic diagram of the power supply adaptor of protection unit.

In a kind of specific embodiment of the utility model, the utility model embodiment provides a kind of micro- for self-powered The power supply adaptor of machine protective device, comprising: iron core 110 and be wound in the primary circuit 120 of the iron core, secondary circuit 130；It connects with the CT secondary circuit of self-powered microcomputer protecting device the primary circuit 120；The secondary circuit 130 with it is described The electric current of self-powered microcomputer protecting device takes electric input port to connect.

It is possible to further set microcrystalline iron core for the iron core 110, microcrystalline iron core may replace silicon steel, perm Alloy and ferrite are as the main transformer in various Switching Power Supplies, control transformer precision current, voltage transformer iron, core filter Wave inductance, Spike-killers, energy storage inductor, reactor, miniature isolating transformer iron core, Switching Power Supply, magnetic amplifier iron core, Earth leakage circuit-breaker iron core.Microcrystalline iron core has high initial magnetic permeability, has very high insertion loss in the line, effectively Inhibit the good frequency characteristic of EMI common-mode noise, good temperature stability can work long hours.

As shown, the number of turns of primary circuit 120 is N1, the number of turns of secondary circuit 130 is N2, can be into for N1, N2 The specific setting of row, in order to be able to provide reliable electric power support for self-powered microcomputer protecting device.It specifically, can be by institute The number of turns for stating primary circuit 120 is set as that the work starting current that the primary circuit 120 reaches ought be flowed through to be the saturation of iron core 110 First presupposition multiple of electric current.It such as can be 1.1 times by first presupposition multiple.It can certainly be set as other times Number, such as specific value can be chosen in the range of 1.0 to 1.2.

Further, described 130 the number of turns of secondary circuit can be set to described secondary when the iron core 110 is saturated The voltage in circuit 130 reaches the second presupposition multiple that microcomputer protecting device CT takes electric power initiation voltage.Such as it can will be described Second presupposition multiple is 0.9 times.Other multiples can certainly be set as, such as can be chosen in the range of 0.8 to 1.0 Specific value.

The utility model embodiment provides a kind of power supply adaptor for self-powered microcomputer protecting device, comprising: iron core 110 and it is wound in the primary circuit 120 of the iron core 110, secondary circuit 130；The primary circuit 120 and self-powered microcomputer The CT secondary circuit 130 of protective device is connected；The electric current of the secondary circuit 130 and the self-powered microcomputer protecting device takes electricity Input port connection.The utility model is connected by using primary circuit 120 with CT secondary circuit 130, thus power supply adaptor one Minor loop 120 (low-resistance) inputs the secondary current of CT, and power supply adaptor secondary circuit 130 exports the electricity as microcomputer protecting device Stream takes electric input, which has good electrical characteristic, and CT secondary current accesses current adapter primary circuit 120 Electric current accuracy is not influenced, and the secondary output of adapter takes electrical characteristics with good, so that self-powered microcomputer protecting device takes Power supply is more stable.

Referring to FIG. 2, Fig. 2 is that one kind provided by a kind of specific embodiment of the utility model is protected for self-powered microcomputer The shell composed structure schematic diagram of the power supply adaptor of protection unit.

It is provided in this embodiment a kind of for self-powered Microcomputer Protection in a kind of specific embodiment of the utility model The power supply adaptor of device further include: the shell 140 with cavity；The cavity places the iron core 110, the primary circuit 120, the secondary circuit 130；First electric connection point 141 of the primary circuit 120, the setting of the second electric connection point 142 In the lower part two sides of the shell；The third electric connection point 143 of the secondary circuit 130, the setting of the 4th electric connection point 144 In the upper end of the shell.

Specifically, as schemed, shell is integrally in cube structure, in two sides of the bottom, screw is respectively adopted and electrically connects to first Contact 141, the second electric connection point 142 carry out external fastening and are detachably connected, and with P1, P2 to the first electric connection point 141, Second electric connection point 142 is identified；At top, using screw to third electric connection point 143, the 4th electric connection point 144, which carry out external fastening, is detachably connected, and is carried out with S1, S2 to third electric connection point 143, the 4th electric connection point 144 Mark.

Referring to FIG. 3, Fig. 3 is that one kind provided by a kind of specific embodiment of the utility model is protected for self-powered microcomputer The connection circuit diagram of the power supply adaptor of protection unit.

In another specific embodiment of the utility model, multiple sub- power supply adaptors can be used, that is to say, that The iron core 110 includes: the first iron core, the second iron core；The primary circuit 120 includes: first sub-loop, one time second Sub-loop；The secondary circuit 130 includes: secondary first sub-loop, secondary second sub-loop；First sub-loop, Second sub-loop is wound in first iron core；Secondary first sub-loop, secondary second sub-loop winding with it is described Second iron core.That is, first sub-loop, second sub-loop are wound in first iron core, thus structure At an individual first sub- power supply adaptor 310；Secondary first sub-loop, secondary second sub-loop winding and described the Two iron cores constitute another individual second sub- power supply adaptor 320.Power supply adaptor 310 sub- for first, the second sub- power supply Adapter 320 and external specific connection, the situation being referred in above-mentioned specific embodiment are not described herein.

Further, in order to enable the electric current of second sub-loop, secondary second sub-loop can be selectively right Microcomputer protecting device is powered, and can be selected using gate second sub-loop, secondary second sub-loop It selects, specific gating rule can be configured according to actual demand, such as be can choose the biggish sub-loop of electric current and carried out Connection.That is, second sub-loop, secondary second sub-loop pass through gating module and the self-powered is micro- The electric current of machine protective device takes electric input port to connect.

In such as figure, 1TAa, 1TAc are current transformer；TA0 is zero sequence current mutual inductor；BHMa, BHMc are power adaptation Device；1A, 2A, 3A are ammeter；3FU, 4FU are fuse；NDK is miniature transformer；1n is self-powered type microcomputer protecting device.

Referring to FIG. 4, Fig. 4 provides a kind of self-powered microcomputer protecting device for another specific embodiment of the utility model Appearance diagram；Fig. 5 is the partial enlarged view of indicator lamp regions shown in Fig. 4；Fig. 6 is the first observation window shown in Fig. 4, open circuit The partial enlarged view of device observation window；Fig. 7 is the partial enlarged view of the second observation window shown in Fig. 4.

In another specific embodiment of the utility model, the utility model embodiment provides a kind of self-powered microcomputer Protective device, equipped with the power adaptation for being used for self-powered microcomputer protecting device described in any specific embodiment of above-mentioned aspect Device.

As shown, in indicator lamp regions 410, the first observation window, breaker observation window 420, the second observation window 430, mark Remember as follows: 1n- self-powered type microcomputer protecting device；A- ammeter；V- voltmeter；TH- condensation controller；HY- energy storage indicator light； HR- combined floodgate indicator light；HG- separating brake indicator light；1LP, 2LP- pressing plate；HK- energy storage switch；SP- switch knob；PA- opening button； EKL-4- fault detector；DX- electrification display；ZM- headlamp.

In a kind of specific embodiment of the utility model, adapter new design input terminal concatenates the secondary circuit of CT It carries out taking electricity, the power input that output terminates to device provides device working power.

Tentatively require adapter that can guarantee that protective device works (can trip) when CT secondary current is 1.5A.(electricity Source adapter model machine parameter, using the iron core of low-voltage current mutual inductor LN-0.66-8/0.25A, 15 circle of input coil, output line 480 circles are enclosed, test result is 1.5A input, input side voltage 1.5V, the peak voltage 60V of output, alternating voltage 35V.Input Coil voltage is very low, will not influence the CT secondary current available accuracy i.e. range of 0.3In or more.

Input current, the output voltage relationship for having connected the power pack of Microcomputer Protection power input are as follows:

When input current is 0.25A, output voltage measured value 28V or more；

When input current is 1.0A, output voltage measured value 37V or more；

When input current is 1.5A, output voltage measured value 40V is hereinafter, in a saturated state；

When input current is 5.0A or more, output voltage measured value 43V or less.

The electric current of DC voltage value and primary coil after test result discovery, adapter secondary voltage peak value and rectification connects It is close linear.

Finally, it is to be noted that, herein, relational terms such as first and second and the like be used merely to by One entity or operation are distinguished with another entity or operation, without necessarily requiring or implying these entities or operation Between there are any actual relationship or orders.Moreover, the terms "include", "comprise" or its any other variant meaning Covering non-exclusive inclusion, so that the process, method, article or equipment for including a series of elements not only includes that A little elements, but also including other elements that are not explicitly listed, or further include for this process, method, article or The intrinsic element of equipment.In the absence of more restrictions, the element limited by sentence "including a ...", is not arranged Except there is also other identical elements in the process, method, article or apparatus that includes the element.

Above to a kind of power supply adaptor and protection for self-powered microcomputer protecting device provided by the utility model Device is described in detail, and specific case used herein explains the principles of the present invention and embodiment It states, the method and its core concept of the above embodiments are only used to help understand the utility model；Meanwhile for ability The those skilled in the art in domain have change based on the idea of the present invention in specific embodiments and applications Place, in conclusion the content of the present specification should not be construed as a limitation of the present invention.

The foregoing description of the disclosed embodiments makes those skilled in the art can be realized or use the utility model. Various modifications to these embodiments will be apparent for a person skilled in the art, general original as defined herein Reason can be realized in other embodiments without departing from the spirit or scope of the present utility model.Therefore, this is practical new Type is not intended to be limited to the embodiments shown herein, and is to fit to and the principles and novel features disclosed herein phase Consistent widest scope.

Claims (10)

1. a kind of power supply adaptor for self-powered microcomputer protecting device characterized by comprising iron core and be wound in institute State primary circuit, the secondary circuit of iron core；

It connects with the CT secondary circuit of self-powered microcomputer protecting device the primary circuit；

The secondary circuit takes electric input port to connect with the electric current of the self-powered microcomputer protecting device.

2. the power supply adaptor according to claim 1 for self-powered microcomputer protecting device, which is characterized in that the iron Core is microcrystalline iron core.

3. the power supply adaptor according to claim 1 for self-powered microcomputer protecting device, which is characterized in that

The number of turns of the primary circuit is set as when flowing through the work starting current that the primary circuit reaches being core sataration electricity First presupposition multiple of stream.

4. the power supply adaptor according to claim 3 for self-powered microcomputer protecting device, which is characterized in that

First presupposition multiple is 1.1 times.

5. the power supply adaptor according to claim 3 for self-powered microcomputer protecting device, which is characterized in that

The voltage that described secondary circuit the number of turns is set as the secondary circuit when the core sataration reaches microcomputer protecting device CT takes the second presupposition multiple of electric power initiation voltage.

6. the power supply adaptor according to claim 5 for self-powered microcomputer protecting device, which is characterized in that

Second presupposition multiple is 0.9 times.

7. the power supply adaptor according to any one of claims 1 to 6 for self-powered microcomputer protecting device, feature exist In,

The iron core includes: the first iron core, the second iron core；

The primary circuit includes: first sub-loop, second sub-loop；

The secondary circuit includes: secondary first sub-loop, secondary second sub-loop；

First sub-loop, second sub-loop are wound in first iron core；

Secondary first sub-loop, secondary second sub-loop winding and second iron core.

8. the power supply adaptor according to claim 7 for self-powered microcomputer protecting device, which is characterized in that

Second sub-loop, secondary second sub-loop pass through gating module and the self-powered microcomputer protecting device Electric current take electric input port to connect.

9. the power supply adaptor according to any one of claims 1 to 6 for self-powered microcomputer protecting device, feature exist In, further includes: the shell with cavity；

The cavity places the iron core, the primary circuit, the secondary circuit；

The first electric connection point, the second electric connection point of the primary circuit are set to the lower part two sides of the shell；

Third electric connection point, the 4th electric connection point of the secondary circuit are set to the upper end of the shell.

10. a kind of self-powered microcomputer protecting device, which is characterized in that be equipped with as described in any one of claim 1 to 9 for certainly The power supply adaptor of power supply microcomputer protecting device.