CN2741257Y - Double power supply switching controller with phase-off protector - Google Patents
Double power supply switching controller with phase-off protector Download PDFInfo
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- CN2741257Y CN2741257Y CNU2004200112634U CN200420011263U CN2741257Y CN 2741257 Y CN2741257 Y CN 2741257Y CN U2004200112634 U CNU2004200112634 U CN U2004200112634U CN 200420011263 U CN200420011263 U CN 200420011263U CN 2741257 Y CN2741257 Y CN 2741257Y
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Abstract
The utility model relates to an open double-power supply switching controller which is provided with a three-phase phase-off signal detection return circuit in the controlling circuit. The three-phase phase-off signal detection return circuit is directly taken from the major circuit of the three phase power supply. The intermediate relay KA1-KA2 and KA3-KA4 are respectively connected to single-phase return circuit phase A and phase B of the power supply major return circuit U1 and U2. The normally open contact spots KA1-KA2 and KA3-KA4 are connected to the input port of controlling circuit of phase U1 and U2 C of the power supply major circuit by a an 'and' logical relation to form a three phase power supply phase-off detection circuit. The utility model has the function of phase-off checking, protecting and exchanging for the three-phase power supply. An inverse exchange can be proceeded automatically after the power supply returning normal and two different obvious warning and clewing sound can be sent out when the a fault occurs and return normal. The production cost is low, the function is completed and the performance is stable and reliable.
Description
Affiliated technical field
The utility model belongs to technical field of electrical automatic control, and what mainly propose is a kind of duplicate supply switch controller with open-phase protection.
Background technology
The duplicate supply switch controller is mainly used in three-phase alternating current (380V/220V 3N-50HZ) and controls automatically for distribution.The characteristics of this class power source switching controller are: its input has duplex feeding power supply U1 and U2, and its output has two-way load W1 and W2.During operate as normal, only to load W1 power supply, power supply U2's power supply U1 only powers to load W2; As power supply U1 (or U2) when breaking down, control system can fast shut-off trouble power U1 (or U2), and the load W1 (or W2) that will be connected to fault loop simultaneously automatically switches to another normal power source U2 (or U1) and continues power supply, and shows with fault alarm.At this moment, two-way load W1 and W2 will be by one road normal power source U2 (or U1) power supplies separately.The problem of Cun Zaiing is thus: (1) no phase shortage defencive function.When arbitrary phase or two-phase phase shortage take place when; because control system does not have phase shortage to detect and protection switching measure; cause the trouble power of phase shortage not cut off; the normal power supply power supply can not in time drop into; there is not corresponding signal prompt again; can cause the long-time phase-deficient operation of load like this, cause serious consequence.(2) trouble power recovers just often, and system can not carry out anti-switching automatically, lean on the manual operation traditional method of indicating the pronunciation of a Chinese character to change to normal operating conditions.(3) break down and recover just often to use the prompting of same sound equipment, be not easily distinguishable.
Summary of the invention
The purpose of this utility model promptly is to propose a kind of duplicate supply switch controller with open-phase protection; its phase shortage that has the three phase supply power supply is detected and the protection handoff functionality; after power up is normal, can carry out anti-switching automatically; breaking down and recovering just often can send respectively two kinds of differences and significantly report to the police and Tip Sound; and it is with low cost; function is comparatively complete, and is stable and reliable for performance.
The utility model is finished the technical scheme that its goal of the invention takes: be provided with three-phase phase shortage detection signal loop, this three-phase phase shortage detection signal loop directly is taken from the major loop of three phase mains, promptly the A that is connected to power supply major loop U1 and U2 respectively with auxiliary relay KA1-KA2 and KA3-KA4 mutually with the mutually single-phase loop of B in, KA1-KA2 and KA3-KA4 normally opened contact with " with " logical relation seal in the input that is connected to power supply major loop U1 and U2 C control circuit mutually.
The utlity model has open-phase protection, short circuit and functions such as overload protection, o-volt protection; Can carry out phase shortage detection, three-phase current demonstration automatically, a certain road power supply can automatically switch to another road power supply when breaking down continues electric, and sends sound and light alarm; After power up is normal, can carry out anti-switching automatically; Breaking down and recovering just often can send respectively two kinds of differences and significantly report to the police and the Tip Sound effect; The open-phase protection that do not have that it has overcome existing low and middle-grade duplicate supply handover control systems can not carry out anti-switching automatically, and Failure And Recovery just often uses single defectives such as sound equipment prompting.Control system of the present utility model has characteristics such as complete function, dependable performance, circuit structure be simple, cheap for manufacturing cost.
Description of drawings
Accompanying drawing 1 is circuit theory diagrams of the present utility model.
Embodiment
In conjunction with the accompanying drawings embodiment is illustrated:
As shown in Figure 1, the duplicate supply handover control system is made up of major loop and control circuit.The input of its major loop has duplex feeding power supply U1 and U2, and its output has two-way load W1 and W2.Power supply U1 major loop links with its load W1 by the main contacts closure of A.C. contactor KM1; Power supply U2 major loop links with its load W2 by the main contacts closure of A.C. contactor KM2; Under the control of control circuit, when a certain power supply breaks down, its A.C. contactor elder generation dead electricity disconnects, make its load break away from the trouble power loop, by the closed conducting contact of the main contacts loop of A.C. contactor KM3, the load automatic switch that is connected to fault loop is continued power supply to another normal power source.Power supply U1 and U2 major loop are gone into the automatic switch QF1 of end and the main effect of QF2 is overload protection and short-circuit protection; Each all has ammeter to indicate the situation of each phase current mutually in the major loop of two-way three phase mains, detects with the phase shortage that cooperates control circuit.
Phase shortage is set in its control circuit detects the loop, its phase shortage detection signal directly is taken from the major loop of three phase mains, A1 for three phase mains U1 detects with B1 phase shortage mutually mutually, each adopts an auxiliary relay KA1 and KA2, the A1 that is connected to power supply U1 major loop respectively mutually and B1 mutually and in the single-phase loop that constitutes with zero line N, the phase shortage detection loop of formation A1, B1 two-phase.The phase shortage of A1, B1 two-phase detects the normally opened contact of auxiliary relay KA1 and KA2, with " with " logical relation seal in the path that is connected to C1 control circuit mutually and go into end.Because self required AC220V single-phase voltage of control circuit is directly taken from the C1 phase (being that the phase shortage that control circuit self has comprised the C1 phase detects) in the U1 three phase mains loop, has so just constituted the phase shortage detection loop to three phase mains U1.In like manner, for the A2 of three phase mains U2 mutually and B2 phase shortage mutually detect, each adopts an auxiliary relay KA3 and KA4, the A2 that is connected to power supply U2 major loop respectively mutually and B2 mutually and with the single-phase loop of zero line N formation in, the phase shortage detection loop of formation A2, B2 two-phase.The phase shortage of A2, B2 two-phase detects the normally opened contact of auxiliary relay KA3 and KA4, with " with " logical relation seal in the path that is connected to C2 control circuit mutually and go into end.Because self required AC220V single-phase voltage of control circuit is directly taken from the C2 phase (being that the phase shortage that control circuit self has comprised the C2 phase detects) in the U2 three phase mains loop, has so just constituted the phase shortage detection loop to three phase mains U2.In the control loop A.C. contactor KM1 and KM2 coil power failure state; directly reflect the phase shortage situation that two-way three phase mains U1 and U2 are total separately respectively; when being arbitrary road three phase mains U1 (or U2) generation phase shortage; KM1 (or KM2) is dead electricity immediately; its normally-closed contact closure makes A.C. contactor KM3 control coil get electric adhesive; the closed conducting contact of main contacts loop by KM3; the load W1 (or W2) that is connected to fault loop is automatically switched to another normal power source U2 (or U1) continue power supply, thereby realize the automatic switchover of open-phase protection.
Two auxiliary relay KA01 and KA02 are set in the control circuit that is connected to the C phase.Wherein the control coil of the KA01 phase shortage that is connected to A1, B1 two-phase detect auxiliary relay KA1 and KA2 normally opened contact " with " logical condition under, promptly KA01 is as total detection of the three-phase phase shortage of power supply U1; The phase shortage that the control coil of KA02 is connected to A2, B2 two-phase detect auxiliary relay KA3 and KA4 normally opened contact " with " logical condition under, promptly KA02 is as total detection of the three-phase phase shortage of power supply U2; The main effect of auxiliary relay KA01 and KA02 is: after fault is got rid of, when three phase mains U1 (or U2) recovers normal power supply, KA01 (or KA02), its normally-closed contact action, cut off KM3 earlier, then make KM1 (or KM2) regain electricity, thereby anti-switching telegram in reply source U1 is to load W1, the power supply U2 state to the normal power supply of load W2 automatically.
Control circuit adopts electric whistle HA0 (or buzzer) as alarm sound (being equipped with red eye simultaneously), and recovers just often to adopt electric bell HA as Tip Sound.Can control respectively and send two kinds of differences significantly warning and Tip Sound effect.
Control system of the present utility model has four kinds of controls (work) state:
1. normal operating conditions: SA1 puts and connects the position before the energized, and SA2 puts the fault alarm position, and after the QF1 that closes, the QF2 energized, SA01, SA02 close respectively.To two-way load W1 and W2 power supply, indicator light HL1 and HL2 show normal operating conditions respectively for duplex feeding power supply U1 and U2.
2. the automatic switchover during fault: power supply break down (phase shortage, decompression etc.) when a certain road, this loop operate as normal indicator light (HL1 or HL2) extinguishes, then KM3 gets electric adhesive, and the fault loop load automatic switch is continued power supply to another road normal power supply power supply.HL3 reports to the police and indicates simultaneously, and electric whistle HA0 sends warning message.At this moment SA2 can be switched to the recovery normal power supply, cut off warning message, prepare for the message of recovering normal power supply simultaneously.
3. the automatic anti-switching after recovering: when fault is got rid of, the KM3 dead electricity is cut off the contact loop, and malfunction indicator lamp HL3 extinguishes, and when separately load normal power supply, electric bell HA sends message and represents to recover normal power supply the two-way power up respectively.At this moment SA2 can be switched to fault alarm: cut off message, prepare for the message of next fault alarm simultaneously.
4. manual-operated emergent switching state: under the 3KM contactor breaks down the situation that can not automatically switch, when a certain road power supply breaks down, at this moment can be manually switched to another road normal power supply power supply to the knife switch of fault loop (QK1 or QK2) and continue to power to the load.
Claims (3)
1; a kind of duplicate supply switch controller with open-phase protection; comprise the two-way three phase mains input major loop of power supply U1 and U2 and be output as load W1 and the W2 and the control circuit of two-way; it is characterized in that: be provided with three-phase phase shortage detection signal loop; three-phase phase shortage detection signal loop directly is taken from the major loop of three phase mains; the A that is connected to power supply major loop U1 and U2 respectively with auxiliary relay KA1-KA2 and KA3-KA4 mutually with the mutually single-phase loop of B in, KA1-KA2 and KA3-KA4 normally opened contact with " with " logical relation seal in the input that is connected to power supply major loop U1 and U2C control circuit mutually.
2, the duplicate supply switch controller with open-phase protection according to claim 1; it is characterized in that: be provided with automatic anti-switching loop, the normally opened contact of its control coil of auxiliary relay KA01 and KA02 of setting by KA1-KA2 and KA3-KA4 " with " logical relation be connected to U1 and U2 respectively C mutually.
3, the duplicate supply switch controller with open-phase protection according to claim 1 is characterized in that: control circuit adopts electric whistle HA0 as alarm sound, and its control coil is in parallel with A.C. contactor KM2 control coil in control circuit; Adopt electric bell HA as recovering normal Tip Sound, its control coil in control circuit the normally opened contact by KM1, KM2, KA3, KA4 " with " logic be connected to U2 C mutually.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNU2004200112634U CN2741257Y (en) | 2004-07-14 | 2004-07-14 | Double power supply switching controller with phase-off protector |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNU2004200112634U CN2741257Y (en) | 2004-07-14 | 2004-07-14 | Double power supply switching controller with phase-off protector |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN2741257Y true CN2741257Y (en) | 2005-11-16 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNU2004200112634U Expired - Fee Related CN2741257Y (en) | 2004-07-14 | 2004-07-14 | Double power supply switching controller with phase-off protector |
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| Country | Link |
|---|---|
| CN (1) | CN2741257Y (en) |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101888084A (en) * | 2010-07-23 | 2010-11-17 | 邯郸新兴重型机械有限公司 | Open phase protector of motor |
| CN101908778A (en) * | 2010-06-29 | 2010-12-08 | 河南省电力公司许昌供电公司 | Multifunctional dual-load dual-power automatic switchover control device |
| TWI399025B (en) * | 2007-12-14 | 2013-06-11 | Hon Hai Prec Ind Co Ltd | Switch circuit of three-phase alternating-current power supply |
| CN106253212A (en) * | 2016-08-24 | 2016-12-21 | 国网山东省电力公司单县供电公司 | A kind of lack zero, phase shortage, phase sequence mistake power-off protection apparatus |
-
2004
- 2004-07-14 CN CNU2004200112634U patent/CN2741257Y/en not_active Expired - Fee Related
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| TWI399025B (en) * | 2007-12-14 | 2013-06-11 | Hon Hai Prec Ind Co Ltd | Switch circuit of three-phase alternating-current power supply |
| CN101908778A (en) * | 2010-06-29 | 2010-12-08 | 河南省电力公司许昌供电公司 | Multifunctional dual-load dual-power automatic switchover control device |
| CN101888084A (en) * | 2010-07-23 | 2010-11-17 | 邯郸新兴重型机械有限公司 | Open phase protector of motor |
| CN106253212A (en) * | 2016-08-24 | 2016-12-21 | 国网山东省电力公司单县供电公司 | A kind of lack zero, phase shortage, phase sequence mistake power-off protection apparatus |
| CN106253212B (en) * | 2016-08-24 | 2018-07-31 | 国网山东省电力公司单县供电公司 | One kind lacking zero, phase shortage, phase sequence mistake power-off protection apparatus |
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| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C19 | Lapse of patent right due to non-payment of the annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |