CN206947259U - A kind of circuit of protective relay - Google Patents

A kind of circuit of protective relay Download PDF

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Publication number
CN206947259U
CN206947259U CN201720808260.0U CN201720808260U CN206947259U CN 206947259 U CN206947259 U CN 206947259U CN 201720808260 U CN201720808260 U CN 201720808260U CN 206947259 U CN206947259 U CN 206947259U
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CN
China
Prior art keywords
relay
micro
central processing
protective
processing unit
Prior art date
Application number
CN201720808260.0U
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Chinese (zh)
Inventor
蔡艳清
曾祥春
王文
周小捷
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惠州市元盛科技有限公司
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Priority to CN201720808260.0U priority Critical patent/CN206947259U/en
Application granted granted Critical
Publication of CN206947259U publication Critical patent/CN206947259U/en

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Abstract

The utility model is a kind of circuit of protective relay, including load circuit module(1), voltage acquisition module(2), relay protection module(3)And control module(4), the control module includes micro- central processing unit(41), the voltage acquisition module includes dropping resistor R1, dropping resistor R1 one end connection live wire L1, and the dropping resistor R1 other ends connect micro- central processing unit;The relay protection module includes relay(5), triode(6), protective resistance R2 and protective resistance R3; described protective resistance R3 one end connects with micro- central processing unit; the protective resistance R3 other ends connect with the triode, and one end of the protective resistance R2 connects with live wire L2, and the other end of the protective resistance R2 connects micro- central processing unit;The circuit of this protective relay can ensure relay in adhesive, and the peak value just at voltage is minimum so that the service life of relay is more permanent.

Description

A kind of circuit of protective relay

Technical field

Relay protection field is the utility model is related to, especially a kind of circuit of protective relay.

Background technology

For relay in the switch motion of control apparatus product, load can typically produce very big dash current, to relay Device produces a very large impact, and directly reduces the service life of relay.At present, the way of generally use is that zero passage is inhaled on the market Close, zero passage adhesive principle:Because civil power is alternating current, crest and trough are just had, if control relay is minimum in peak value When close contact, such dash current is minimum, can effectively extend the service life of relay.But because relay The regular hour is needed during adhesive, and relay is produced in batches, has inconsistency, even if the good time is inhaled in 0V Close, actually can also offset a lot, electric current equally can be very big, lose the meaning of zero passage adhesive.

Utility model content

In order to solve the above problems, the purpose of this utility model is to provide a kind of circuit of protective relay, this protection after The circuit of electrical equipment can ensure relay in adhesive, and the peak value just at voltage is minimum so that relay uses the longevity Life is more permanent.

The technical solution of the utility model is as follows:

A kind of circuit of protective relay, including load circuit module, voltage acquisition module, relay protection module and control Molding block, the control module include micro- central processing unit, and the voltage acquisition module includes dropping resistor R1, the decompression electricity R1 one end connection live wire L1 is hindered, the dropping resistor R1 other ends connect micro- central processing unit;The relay protection mould Block includes relay, triode, protective resistance R2 and protective resistance R3, described protective resistance R3 one end and micro- central processing Device connects, and the protective resistance R3 other ends connect with the triode, and one end of the protective resistance R2 connects with live wire L2, The other end of the protective resistance R2 connects micro- central processing unit.

Preferably, micro- central processing unit has tri- ports of A, B, C, the dropping resistor R1 and micro- central processing The A ports connection of device, the protective resistance R2 connect with the B ports of micro- central processing unit, the protective resistance R3 and institute State the C-terminal mouth connection of micro- central processing unit.

Preferably, the dropping resistor R1, protective resistance R2 and protective resistance R3 resistance are all adjustable.According to reality The resistance of demand de-regulation dropping resistor and protective resistance, make its scope of application wider.

Preferably, the relay often closes 1000 times, micro- central processing unit from new starting relay once.This can be with Directly set when micro- central processing unit dispatches from the factory, naturally it is also possible to change.

The invention also discloses another technical scheme is as follows:

A kind of method of protective relay, comprises the following steps:

S1:Closed circuit, controller obtain the normalized phase information and cycle time T0 using voltage for the first time;

S2:While step S1, also control relay closes controller, and controller also obtains relay and closed for the first time Close time T1, after the completion of controller control relay disconnect;

S3:Controller calculates relay just most according to the step S1 normalized phase information obtained and cycle time T0 When being closed during low peak, it is required in advance or retardation time T3, T3=T1-(n+1)T0, n are positive integer or n=0;

S4:When relay closes again, controller directly according to step S3 calculate gained T3, allow relay in advance or Postpone T3 to open, if T3 is positive number, obtain normalized phase information relative to step S1, relay is just in minimum peak Closure is, it is necessary to which relative minimum peak time advance opening time is T3, if T3 is negative, relative to step S1 acquisition standards Phase information, relay closes just in minimum peak, it is necessary to which relative minimum peak time retardation opening time is | T3 |.

Preferably, the relay often closes 1000 times, and controller obtains relay closing time T1 from new.Certainly, It can according to the actual requirements go to set from new and obtain relay closing time T1, relay often closes 1000 times and simply commonly used.

Using having the beneficial effect that for above technical scheme:

1. the circuit of a protective relay can ensure relay in adhesive, the peak value just at voltage be it is minimum, So that the service life of relay is more permanent.

2. the circuit of a protective relay is simple, it is only necessary to the time twice is tested, very simply, moreover, realizing To be very easy to.

3. the circuit of a protective relay is provided with the mechanism for detecting relay closing time again, because existing in relay Work after a period of time, due to mechanical fatigue, also result in pickup time deviation, the method for this protective relay is provided with again The mechanism of relay closing time is detected, this situation can be avoided.

4. the circuit of a protective relay is started shooting the pickup time of first busy relay every time, shift to an earlier date further according to pickup time Instruction is sent, effectively prevent circuit malfunction caused by the inconsistency of relay, greatly extends relay service life.

5. the design of the circuit of a protective relay is very simple, it is only necessary to a micro- central processing unit can be completed, Moreover, it is also possible to according to the demand de-regulation dropping resistor of reality and the resistance of protective resistance, make its scope of application wider.

Brief description of the drawings

Fig. 1 is the method for the utility model protective relay and the circuit diagram of circuit.

The title or process name of the corresponding component of digital or alphabetical representative in figure:1. load circuit module, 2. electricity Press acquisition module, 3. relay protection modules, 4. control modules, 41. micro- central processing units, 5. relays, 6. triodes.

Embodiment

For the ease of it will be appreciated by those skilled in the art that entering to advance to the utility model below in conjunction with accompanying drawing and embodiment One step is described in detail.

Embodiment one

A kind of method of protective relay, comprises the following steps:

S1:Closed circuit, controller obtain the normalized phase information and cycle time T0 using voltage for the first time;This implementation It is 220V, cycle time T0=20ms that example, which is obtained using voltage,;

S2:While step S1, also control relay closes controller, and controller also obtains relay and closed for the first time Close time T1, after the completion of controller control relay disconnect;The present embodiment relay closing time T1=35ms;

S3:Controller calculates relay just most according to the step S1 normalized phase information obtained and cycle time T0 When being closed during low peak, it is required in advance or retardation time T3, T3=T1-(n+1)T0, n are positive integer or n=0;

S4:When relay closes again, controller directly according to step S3 calculate gained T3, allow relay in advance or Postpone T3 to open, if T3 is positive number, obtain normalized phase information relative to step S1, relay is just in minimum peak Closure is, it is necessary to which relative minimum peak time advance opening time is T3, if T3 is negative, relative to step S1 acquisition standards Phase information, relay closes just in minimum peak, it is necessary to which relative minimum peak time retardation opening time is | T3 |.This When n=0 is calculated in embodiment, T3=15ms, then normalized phase information is obtained relative to step S1, relay is just in most ebb Closure during value is, it is necessary to which relative minimum peak time advance opening time is 15ms, and certainly, n can also take other positive integers, such as N=1, then T3=- 5ms, then obtain normalized phase information relative to step S1, relay closed just in minimum peak, it is necessary to It is 5ms with respect to minimum peak time retardation opening time;

Specifically, relay often closes 1000 times, controller obtains relay closing time T1 from new.

Embodiment two

The method of protective relay in the present embodiment two, relay often close 500 times, and controller obtains relay from new Closing time T1, miscellaneous part and connected mode are identical with embodiment one.

Embodiment three

A kind of circuit of protective relay, including load circuit module 1, voltage acquisition module 2, relay protection module 3 With control module 4, control module includes micro- central processing unit 41, and voltage acquisition module includes dropping resistor R1, dropping resistor R1 One end connects live wire L1, and the dropping resistor R1 other ends connect micro- central processing unit;Relay protection module includes relay 5, three Pole pipe 6, protective resistance R2 and protective resistance R3, protective resistance R3 one end connect with micro- central processing unit, and protective resistance R3 is another End connects with triode, and protective resistance R2 one end connects with live wire L2, and the protective resistance R2 other end connects micro- central processing Device.Micro- central processing unit that the present embodiment uses for.

Specifically, micro- central processing unit has the A ports company of tri- ports of A, B, C, dropping resistor R1 and micro- central processing unit Connect, protective resistance R2 connects with the B ports of micro- central processing unit, and protective resistance R3 connects with the C-terminal mouth of micro- central processing unit.This Micro- central processing unit that embodiment uses is SPM8 series.

Specifically, dropping resistor R1, protective resistance R2 and protective resistance R3 resistance are all adjustable.

The workflow of the circuit of this protective relay is as follows:Power on circuitry first, live wire L1 are depressured into a subtle way by R1 Type central processing unit A ports, miniature central processing unit is allowed to obtain the phase information and cycle T 0 of standard, after relay adhesive, The phase information of live wire enters miniature central processing unit B ports again by R2, while obtains relay-operating time T1, miniature Compare B ports and the time difference obtained with A ports inside central processing unit, calculate sent instructions by C points allow relay in advance or The time difference T3 of postponement.

Example IV

Micro- central processing unit of the circuit of protective relay in the present embodiment four be PICF16F series, miscellaneous part and Connected mode is identical with embodiment three.

Above is with reference to the accompanying drawing in the utility model embodiment, the technical scheme in the embodiment of the utility model is carried out Clearly and completely describing, it is clear that described embodiment is only the utility model part of the embodiment, rather than whole Embodiment.Based on the embodiment in the utility model, those of ordinary skill in the art are not under the premise of creative work is made The every other embodiment obtained, belong to the scope of the utility model protection.

Claims (4)

1. a kind of circuit of protective relay, it is characterised in that including load circuit module(1), voltage acquisition module(2), after Electric prospection module(3)And control module(4), the control module includes micro- central processing unit(41), the voltage acquisition mould Block includes dropping resistor R1, and dropping resistor R1 one end connection live wire L1, the dropping resistor R1 other ends connect described micro- Central processing unit;The relay protection module includes relay(5), triode(6), protective resistance R2 and protective resistance R3, Described protective resistance R3 one end connects with micro- central processing unit, and the protective resistance R3 other ends and the triode connect Connect, one end of the protective resistance R2 connects with live wire L2, and the other end of the protective resistance R2 connects micro- central processing Device.
2. the circuit of protective relay according to claim 1, it is characterised in that micro- central processing unit has A, B, C Three ports, the dropping resistor R1 connect with the A ports of micro- central processing unit, the protective resistance R2 and it is described it is micro- in The B ports connection of central processor, the protective resistance R3 connect with the C-terminal mouth of micro- central processing unit.
3. the circuit of protective relay according to claim 2, it is characterised in that the dropping resistor R1, protective resistance R2 and protective resistance R3 resistance are all adjustable.
4. the circuit of the protective relay according to claim any one of 1-3, it is characterised in that the relay often closes 1000 times, micro- central processing unit from new starting relay once.
CN201720808260.0U 2017-07-06 2017-07-06 A kind of circuit of protective relay CN206947259U (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN201720808260.0U CN206947259U (en) 2017-07-06 2017-07-06 A kind of circuit of protective relay

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN201720808260.0U CN206947259U (en) 2017-07-06 2017-07-06 A kind of circuit of protective relay

Publications (1)

Publication Number Publication Date
CN206947259U true CN206947259U (en) 2018-01-30

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Family Applications (1)

Application Number Title Priority Date Filing Date
CN201720808260.0U CN206947259U (en) 2017-07-06 2017-07-06 A kind of circuit of protective relay

Country Status (1)

Country Link
CN (1) CN206947259U (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN107248478A (en) * 2017-07-06 2017-10-13 惠州市元盛科技有限公司 The method and circuit of a kind of protective relay

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN107248478A (en) * 2017-07-06 2017-10-13 惠州市元盛科技有限公司 The method and circuit of a kind of protective relay
CN107248478B (en) * 2017-07-06 2020-09-04 惠州市元盛科技有限公司 Method and circuit for protecting relay

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