KR850001219B1 - Overload relay - Google Patents
Overload relay Download PDFInfo
- Publication number
- KR850001219B1 KR850001219B1 KR1019830005174A KR830005174A KR850001219B1 KR 850001219 B1 KR850001219 B1 KR 850001219B1 KR 1019830005174 A KR1019830005174 A KR 1019830005174A KR 830005174 A KR830005174 A KR 830005174A KR 850001219 B1 KR850001219 B1 KR 850001219B1
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- South Korea
- Prior art keywords
- input
- operating
- motor
- overload
- output
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- 239000003990 capacitor Substances 0.000 claims 2
- 230000006698 induction Effects 0.000 claims 2
- 230000000903 blocking effect Effects 0.000 claims 1
- 238000010586 diagram Methods 0.000 description 2
- XUIMIQQOPSSXEZ-UHFFFAOYSA-N Silicon Chemical compound [Si] XUIMIQQOPSSXEZ-UHFFFAOYSA-N 0.000 description 1
- 230000003111 delayed effect Effects 0.000 description 1
- 238000001514 detection method Methods 0.000 description 1
- 230000001939 inductive effect Effects 0.000 description 1
- 229910052710 silicon Inorganic materials 0.000 description 1
- 239000010703 silicon Substances 0.000 description 1
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02H—EMERGENCY PROTECTIVE CIRCUIT ARRANGEMENTS
- H02H7/00—Emergency protective circuit arrangements specially adapted for specific types of electric machines or apparatus or for sectionalised protection of cable or line systems, and effecting automatic switching in the event of an undesired change from normal working conditions
- H02H7/08—Emergency protective circuit arrangements specially adapted for specific types of electric machines or apparatus or for sectionalised protection of cable or line systems, and effecting automatic switching in the event of an undesired change from normal working conditions for dynamo-electric motors
- H02H7/085—Emergency protective circuit arrangements specially adapted for specific types of electric machines or apparatus or for sectionalised protection of cable or line systems, and effecting automatic switching in the event of an undesired change from normal working conditions for dynamo-electric motors against excessive load
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- Motor And Converter Starters (AREA)
- Protection Of Generators And Motors (AREA)
Abstract
내용 없음.No content.
Description
첨부도면은 본 발명의 회로도.The accompanying drawings are circuit diagrams of the present invention.
* 도면의 주요부분에 대한 부호의 설명* Explanation of symbols for main parts of the drawings
AC : 삼상교류전원 NFB : 노휴-즈 부레카AC: Three-Phase AC Power Source NFB: Nohyu-zu Bureca
M : 마그넷트 스윗치 K : DC 리레이M: Magnet Switch K: DC Relay
LOAD : 부하 CT1, CT2: 변류기LOAD: Load CT 1 , CT 2 : Current Transformer
ON : 온 보턴스윗치 OFF : OFF 보턴스윗치ON: ON button switch OFF: OFF Button switch
IC1, IC2, IC3, IC4: 집적회로 D1, D2, D3, D4, D5, D6: 다이오드IC 1 , IC 2 , IC 3 , IC 4 : Integrated Circuits D 1 , D 2 , D 3 , D 4 , D 5 , D 6 : Diodes
C1, C2, C3, C4, C5, C6, C7: 콘덴사 R1, R2, R3, R4, R5, R6, R7: 저항C 1 , C 2 , C 3 , C 4 , C 5 , C 6 , C 7 : condensate R 1 , R 2 , R 3 , R 4 , R 5 , R 6 , R 7 : resistance
TR1, TR2: 트랜지스타 SCRI : 씨리콘 제어소자TR 1 , TR 2 : Transistor Star SCRI: Silicon Control Device
VR1, VR2: 가변저항VR 1 , VR 2 : Variable resistor
본 발명은 호이스트 및 기아드모타와 같이 과부하상태가 되었을 때 시간의 지연이 없이 순간적으로 차단되지 않으면 안되는 속단성이 요구되는 특수한 경우의 기기를 보호하고 사고를 미리 막기 위한 속단성 과부하차단 리레이에 관한 것이다.The present invention provides a fast overload protection relay for protecting a special case of a device that requires an instantaneous disconnection without a time delay when an overload condition such as a hoist and a geared motor is required. It is about.
종래 사용해 오든 NFB(노휴-즈 부레카)나 바이메탈식 써멀리레이(Thermacrelay) 혹은 유도형 과전류계절기 기타 범용 전자식 계전기 등에서는 거의 불가능했든 점인 촌동에 의한 순간적인 기동전류에서는 동작하지 않고 촌동이 끝난 후 설정된 시간내에 동작하도록 설계된 것이 본 발명의 특색인 것이다.It is not operated at the instantaneous starting current by the villager, which is almost impossible with the conventionally used NFB (North-Bureka), bimetallic thermal relay or inductive type overcurrent season or other general purpose electronic relay. It is a feature of the invention that it is designed to operate within a later set time.
본 발명에서는 동작시간이 0.1초 이내로, 과부하 차단기능이 0.1A 이내로 설정할 수 있고 동작이 정확하며 안가하고 수명이 길고 부피가 적어 호이스트 또는 이와 유사한 부하에 적합한 것이다.In the present invention, the operating time is less than 0.1 seconds, the overload cut-off function can be set within 0.1A, the operation is accurate, safe, long life and small volume is suitable for a hoist or similar load.
본 고안을 회로도에 의하여 상세히 설명하면, 변료기(CT1, CT2)에서 검출된 절류세력은 다이오드 D1, D2에 의하여 반파정류되어 콘덴사 C1에 충전된다.When the present invention is described in detail by the circuit diagram, the currents detected by the transformers CT 1 and CT 2 are half-wave rectified by the diodes D 1 and D 2 to be charged in the condensate C 1 .
저항 R7은 CT1과 CT2의 2차 세력을 동일하게 조정해주기 위한 바란싱 저항이다. 콘덴사 C1에 충전된 전압은 집적회로 IC1의 입력단자에 인가된다. IC1은 Cnos Hex Inverting Buffer로써 그의 고유의 특성에 따라 입력단자에 인가된 전압이 그의 전원단자 전압의 절반 이상으로 상승하게 되면 출력이 Low 상태로 변하고 절반 이하로 되면 High 상태를 유지한다.Resistor R 7 is a balancing resistor for adjusting the secondary forces of CT 1 and CT 2 equally. The voltage charged in condenser C 1 is applied to the input terminal of the integrated circuit IC 1 . IC 1 is a Cnos Hex Inverting Buffer. According to its inherent characteristics, the output turns low when the voltage applied to the input terminal rises to more than half of its power terminal voltage, and remains high when it is less than half.
특히 모타 부하에서 전원이 ON되여 모타가 기동을 할 때는 4-6배의 기동전류가 흐르게 되여 IC1의 입력전압이 갑작히 높아져 그 전원전압의 1/2 이상이 되여 IC1의 출력은 High에서 Low로 급변한다. 이 출력파형의 변화는 구형파에 가까우며 IC1의 출력측에 구성된 미분회로 C2, R2에 인가된다.In particular, the power from the motor load doeyeo ON when the motor is started, the starting current to flow doeyeo of 4-6 times the input voltage of the IC 1 is suddenly increased Hi doeyeo more than one-half of the supply voltage output of the IC 1 is in High Rapidly changes to low. The change in the output waveform is close to the square wave and is applied to the differential circuits C 2 and R 2 configured on the output side of IC 1 .
이미 분회로를 통과한 구형파는 뾰족한 펄스상의 미분파형이 되여 IC2, IC2, D4, VR2, C4, IC3로 구성된 재트리가형 단안정 멀티바이브레이타에 트리가 신호로 인가된다.The square wave, which has already passed through the branch circuit, becomes a pointed differential wave form, and the tree is applied as a signal to the retree-type monostable multivibrator composed of IC 2 , IC 2 , D 4 , VR 2 , C 4 , and IC 3 . .
IC2의 입력측은 R2에 의하여 평소에는 High 상태이고 출력측은 Lcw 상태에 있다. 그리고 다이오드 D4와 가변저항 VR2에 직결된 IC3의 입력도 Low 상태이고 출력은 High 상태가 되고 있다. 그러나 IC1의 출력이 High에서 Low로 급변하면 C2, R2에 의해 형성된 펄스파형이 IC2에 가해져 IC2의출력이 Low에서 High로 변한다.The input side of IC 2 is normally high by R 2 and the output side is in Lcw state. In addition, the input of the IC 3 directly connected to the diode D 4 and the variable resistor VR 2 is in a low state and the output is in a high state. However, if the output of the IC 1 is rapidly changing from High to Low is a pulse waveform formed by C 2, R 2 is applied to the IC 2 changes in the output of the IC 2 is Low to High.
이 펄스전압에 의해 C4에는 D4를 통하여 전원전압까지 충전된다. 따라서 IC3의 입력측은 High가 되고 출력은 Low로 된다. 일단 C4에 충전된 전압은 IC3의 입력임피단스가 수메가옴으로 높기 때문에 기동시간조정용 저항 VR2를 통해 서서히 방전된다. 따라서 C4와 VR2에 의한 시정수에 따른 속도로 방전되여 IC3의 출력에 Low 상태를 유지해 준다.By this pulse voltage, C 4 is charged to the power supply voltage through D 4 . Therefore, the input side of IC 3 goes high and the output goes low. Once charged to C 4 , the input impedance of IC 3 is high in the order of several megaohms, so it is gradually discharged through the start time resistance VR 2 . Therefore, it discharges at the speed according to the time constant by C 4 and VR 2 , and keeps the low state at the output of IC 3 .
이 때 모터의 기동 전류에 의해 C1에는 높은 전압이 유기되고 상술한 바와 같이 IC3의 출력이 기동순간에만 Low로 되고 있는데 이 때 과부하 감지회로측에서도 C1의 높은 전압이 다이오드 D3를 넘어서 콘덴사 C5에 갑작히 충전되고 과부하 설정용 가변저항 VR1에 의해 설정한 전압치로 되여 저항 R1과 콘덴사 C3에 의해 구성된 적분회로에 의해 AC 리풀이 휠타되고 지연되여 IC4의 입력으로 가해진다. IC4는 2입력 Nand Gate로서 입력 A, B가 모두 High일 때만 출력이 Low로 되여 저항 R3를 통해 트랜지스타 TR1에 베이스 전류가 흘러 TR1이 도통되고 SCR1을 도통시키게 되여 DC Velay코일 t4 를 동작시키는 구조로 되어 있다. 따라서 모타가 기동될 때의 수배의 전류에 의하여 IC3의 출력이 Low로 되면 IC4의 입력 A가 Low로 되고 기동전류에 의하여 IC4의 입력 B가 High로 되어도 IC4의 출력이 변하지 않는다.At this time, a high voltage is induced to C 1 by the starting current of the motor, and as described above, the output of IC 3 goes low only at the starting moment. At this time, the high voltage of C 1 exceeds the diode D 3 in the overload detection circuit. The denser C 5 suddenly charges and returns to the voltage value set by the variable resistor VR 1 for overload setting, and the AC repulse is driven and delayed by the integrating circuit configured by the resistor R 1 and condenser C 3 and applied to the input of IC 4 . All. IC 4 has two input Nand a Gate only if the inputs A, B are both High output doeyeo to Low via a resistor R 3 to flow the base current to the transfected G-Star TR 1 is TR 1 and the conductive doeyeo thereby the SCR 1 conduction DC Velay coil It is structured to operate t4. Therefore, even if the input A of the IC 4 is a Low input B of the IC 4 by the starting current is the High output of the IC 4 and does not change when in the output of the IC 3 by a current of several times Low when the motor is started.
그러나 모타에 촌동이 끝나고 기동이 완료된 순간에 과부하가 걸리면 C4, VR2에 의해 Set된 시간 경과 후 IC3의 출력이 Low에서 High로 다시 바뀐 상태이므로 IC4의 입력 A가 High 상태이고 여기에 과부회로측 IC4의 입력 B에 High가 되면 IC4의 출력은 Low로 되고 R3를 거쳐 TR1의 베이스에 전류가 흘러 TR1이 도통되면 SCR1도 동시에 도통된다.However, at the moment the end of the jog the motor has completed the start-up takes an overload C 4, because it is output after the lapse of the time Set by VR 2 IC 3 in this state from Low changes back to High the input A of the IC 4 High state and here When the input B of the overload side IC 4 goes high, the output of the IC 4 goes low, and when the current flows through the base of TR 1 through R 3 , TR 1 conducts and SCR 1 conducts simultaneously.
따라서 SCR1의 애노드측에 접속된 Relay t5 를 작동시켜 부속회로에 의해 부하를 차단한다.Therefore, the relay t5 connected to the anode side of SCR 1 is operated to cut the load by the accessory circuit.
Claims (1)
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| KR1019830005174A KR850001219B1 (en) | 1983-11-01 | 1983-11-01 | Overload relay |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| KR1019830005174A KR850001219B1 (en) | 1983-11-01 | 1983-11-01 | Overload relay |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| KR850003634A KR850003634A (en) | 1985-06-20 |
| KR850001219B1 true KR850001219B1 (en) | 1985-08-20 |
Family
ID=19230305
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| KR1019830005174A KR850001219B1 (en) | 1983-11-01 | 1983-11-01 | Overload relay |
Country Status (1)
| Country | Link |
|---|---|
| KR (1) | KR850001219B1 (en) |
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1983
- 1983-11-01 KR KR1019830005174A patent/KR850001219B1/en not_active IP Right Cessation
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| Publication number | Publication date |
|---|---|
| KR850003634A (en) | 1985-06-20 |
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