CN103715759B - Power selection and interlocking device of automatic change-over switch appliance used in 690V IT system - Google Patents
Power selection and interlocking device of automatic change-over switch appliance used in 690V IT system Download PDFInfo
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- CN103715759B CN103715759B CN201310744017.3A CN201310744017A CN103715759B CN 103715759 B CN103715759 B CN 103715759B CN 201310744017 A CN201310744017 A CN 201310744017A CN 103715759 B CN103715759 B CN 103715759B
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Abstract
A power selection and interlocking device of an automatic change-over switch appliance used in a 690V IT system comprises a closing signal interlocking circuit and an electric operation mechanism interlocking circuit. The switching signal interlocking circuit comprises a first contactor, a first contactor control coil, a first contactor normally-closed contact, a second contactor, a second contactor control coil, a second contactor normally-closed contact, a first power selection interlocking line and a second power selection interlocking line. The electric operation mechanism interlocking circuit comprises a first execution switch first normally-closed contact, a first execution switch second normally-closed contact, a first execution switch closing coil, a second execution switch first normally-closed contact, a second execution switch second normally-closed contact, a second execution switch closing coil, a third execution switch first normally-closed contact and a third execution switch second normally-closed contact. The power selection and interlocking device not only has the functions of a common automatic power source change-over switch, but also has the capacity for withstanding 12KV rated impact voltage due to the fact that the distributed power selection and interlocking device structures are arranged.
Description
Technical field
The invention belongs to automatic transfer switching electric appliance technical field, particularly relate to a kind of choosing for the automatic transfer switching electric appliance in 690V IT system electricity, interlock.
Background technology
Along with the development of distribution technique, the requirement of people to power supply reliability is more and more higher, thus expedites the emergence of out automatic transfer switching electric appliance.Due to the last line of defense in automatic transfer switching electric appliance often distribution system, so be also higher to its requirement.
Known to the nominal voltage of power-supply system in GB GB14048.1 and the corresponding relation of rated impulse withstand voltage, when automatic transfer switching electric appliance is in the IT system of 690V time, need to reach 12KV to the tolerance degree of rated impulse withstand voltage, because the choosing of automatic transfer switching electric appliance is in the market electric, interlock is made up of electronic relay substantially, therefore this degree of protection can not be reached.
And can be learnt by the character of alternating current, if two-way power supply is in parallel by force under all consistent condition of discontented afc voltage, frequency, phase place, phase sequence, gently phase fault transformer demolition then occur, heavy then occurrence of large-area power outage.
Summary of the invention
In order to solve the problem, the object of the present invention is to provide a kind of choosing for the automatic transfer switching electric appliance in 690V IT system electricity, interlock.
In order to achieve the above object, the electricity of the choosing for the automatic transfer switching electric appliance in 690V IT system provided by the invention, interlock comprise: switching signal interlock circuit and motor-operating mechanism interlock circuit; Switching signal interlock circuit comprises: the first contactor Z1, the first contactor control coil Z1L, the first contactor normally-closed contact Z1-b1, the second contactor Z2, the second contactor control coil Z2L, the second contactor normally-closed contact Z2-b1, the first choosing electricity interlocking line J1 and second choosing electricity interlocking line J2;
Motor-operating mechanism interlock circuit comprises: first performs switch first normally-closed contact A1-b1, first performs switch second normally-closed contact A1-b2, first performs switch closing coil A1L, second performs switch first normally-closed contact A2-b1, second performs switch second normally-closed contact A2-b2, second performs switch closing coil A2L, 3rd performs switch first normally-closed contact A3-b1, 3rd performs switch second normally-closed contact A3-b2, 3rd performs switch closing coil A3L, C phase line J3, A phase line J4, first closes a floodgate interlocks line J5, second closes a floodgate interlocks line J6 and the 3rd combined floodgate interlocking line J7,
Wherein: the first contactor Z1 input side is connected with C with the A phase of the first power supply, the second contactor Z2 input side is connected with C with the A phase of second source.The outlet side of the second contactor Z2 is directly connected with A phase line J4 with C phase line J3;
First performs switch second normally-closed contact A1-b2 and second closes a floodgate and interlocks line J6 and be connected, first performs switch first normally-closed contact A1-b1 and the 3rd closes a floodgate and interlocks line J7 and be connected, second performs switch second normally-closed contact A2-b2 and first closes a floodgate and interlocks line J5 and be connected, second performs switch first normally-closed contact A2-b1 and second closes a floodgate and interlocks line J6 and be connected, 3rd performs switch second normally-closed contact A3-b2 and first closes a floodgate and interlocks line J5 and be connected, and the 3rd execution switch first normally-closed contact A3-b1 and the 3rd closes a floodgate and interlocks line J7 and be connected;
First performs switch closing coil A1L, second performs the input side that switch closing coil A2L, the 3rd performs switch closing coil A3L and is connected with A phase line J4, and outlet side closes a floodgate with first respectively and interlocks line J5, the 3rd and close a floodgate and interlock line J7, second and close a floodgate and interlock line J6 and be connected;
First choosing electricity interlocking line J1 is connected with the outlet side of the first contactor Z1 control coil Z1L and the input side of the second contactor normally-closed contact Z2-b1 respectively, and the second choosing electricity interlocking line J2 is connected with the outlet side of the second contactor control coil Z2L and the input side of the first contactor normally-closed contact Z1-b1 respectively;
First switching signal is connected with the second contactor normally-closed contact Z2-b1 output, and the second switching signal is connected with the first contactor normally-closed contact Z1-b1 output.
2, the electricity of the choosing for the automatic transfer switching electric appliance in 690V IT system according to claim 1, interlock, is characterized in that: the first described contactor Z1 and the second contactor Z2 are contained in the both sides of different execution circuit breakers respectively.
Choosing for the automatic transfer switching electric appliance in 690V IT system electricity provided by the invention, interlock, not only there is common automatic transferring switch of power supply function, and due to it, there is distributed choosing electricity, interlock structure, there is the ability of tolerance 12KV rated impulse withstand voltage.
This device has following technique effect:
1) the choosing electricity of the automatic transfer switching electric appliance of this device, interlock belong to that distributed choosing is electric, interlock, have enough large creepage distance and electric clearance.
2) the choosing electricity of the automatic transfer switching electric appliance of this device, interlock are owing to have employed separate type contactor, thus easily can reach the choosing of integral type in the past electricity, rated impulse withstand voltage grade that interlock does not reach.
3) the choosing electricity of the automatic transfer switching electric appliance of this device, interlock owing to have employed the syndeton of electrical interlocks, thus avoid the risk that two-way separate type contactor in case of a fault closes a floodgate simultaneously.
4) the choosing electricity of the automatic transfer switching electric appliance of this device, interlock are owing to have employed separate type contactor, so screw can be relied on to be arranged on screw hole or buckle is stuck on draw-in groove, expand the scope of application.
Accompanying drawing explanation
Fig. 1 is the major loop winding diagram of the choosing for the automatic transfer switching electric appliance in 690V IT system provided by the invention electricity, interlock;
Fig. 2 be the choosing for the automatic transfer switching electric appliance in 690V IT system provided by the invention electricity, interlock select electric installation schematic diagram;
Fig. 3 is the control loop schematic diagram of the choosing for the automatic transfer switching electric appliance in 690V IT system provided by the invention electricity, interlock;
Embodiment
Below in conjunction with the drawings and specific embodiments, the electricity of the choosing for the automatic transfer switching electric appliance in 690V IT system provided by the invention, interlock are described in detail.
As shown in Figure 1, the major loop of this device is performed switch A3 formed by the first execution switch A1, the second execution switch A2 and the 3rd.
As shown in Figure 2, in this device automatic transfer switching electric appliance choosing electricity, interlock comprises the first contactor Z1, the second contactor Z2, switching signal interlock circuit and motor-operating mechanism interlock circuit, wherein: the electric energy of the first power supply and second source can be incorporated into motor-operating mechanism interlock circuit by the first contactor Z1 and the second contactor Z2 by this device respectively, but due to above-mentioned parallel operation risk need between the first contactor Z1 and the second contactor Z2, introduce switching signal interlock circuit.
As shown in Figure 3, switching signal interlock circuit comprises: the first contactor control coil Z1L, the first contactor normally-closed contact Z1-b1, the second contactor control coil Z2L, the second contactor normally-closed contact Z2-b1, the first choosing electricity interlocking line J1 and second choosing electricity interlocking line J2, motor-operating mechanism interlock circuit comprises: first performs switch first normally-closed contact A1-b1, first performs switch second normally-closed contact A1-b2, first performs switch closing coil A1L, second performs switch first normally-closed contact A2-b1, second performs switch second normally-closed contact A2-b2, second performs switch closing coil A2L, 3rd performs switch first normally-closed contact A3-b1, 3rd performs switch second normally-closed contact A3-b2, 3rd performs switch closing coil A3L, C phase line J3, A phase line J4, first closes a floodgate interlocks line J5, second closes a floodgate interlocks line J6 and the 3rd combined floodgate interlocking line J7,
Wherein: the first contactor Z1 input side is connected with C with the A phase of the first power supply, the second contactor Z2 input side is connected with C with the A phase of second source.The outlet side of the second contactor Z2 is directly connected with A phase line J4 with C phase line J3;
First performs switch second normally-closed contact A1-b2 (ON/OFF position feedback contact) and second closes a floodgate and interlocks line J6 and be connected, first performs switch first normally-closed contact A1-b1 and the 3rd closes a floodgate and interlocks line J7 and be connected, second performs switch second normally-closed contact A2-b2 and first closes a floodgate and interlocks line J5 and be connected, second performs switch first normally-closed contact A2-b1 and second closes a floodgate and interlocks line J6 and be connected, 3rd performs switch second normally-closed contact A3-b2 and first closes a floodgate and interlocks line J5 and be connected, 3rd performs switch first normally-closed contact A3-b1 and the 3rd closes a floodgate and interlocks line J7 and be connected,
First performs switch closing coil A1L, second performs the input side that switch closing coil A2L, the 3rd performs switch closing coil A3L and is connected with A phase line J4, and outlet side closes a floodgate with first respectively and interlocks line J5, the 3rd and close a floodgate and interlock line J7, second and close a floodgate and interlock line J6 and be connected;
First choosing electricity interlocking line J1 is connected with the outlet side of the first contactor Z1 control coil Z1L and the input side of the second contactor normally-closed contact Z2-b1 respectively, and the second choosing electricity interlocking line J2 is connected with the outlet side of the second contactor control coil Z2L and the input side of the first contactor normally-closed contact Z1-b1 respectively;
First switching signal is connected with the second contactor normally-closed contact Z2-b1 output, and the second switching signal is connected with the first contactor normally-closed contact Z1-b1 output.
The first described contactor Z1 and the second contactor Z2 are contained in the both sides of different execution circuit breakers respectively, and all have the ability that can tolerate 12KV rated impulse withstand voltage.
As shown in Figure 3, the choosing electricity of automatic transfer switching electric appliance in this device, contactor choosing electricity, interlocked connecting mechanism and working method in interlock are as follows:
When the first switching signal sets low by controller, when sending action command, if the long closed contact of the second contactor Z2 closes Z2b1, then the first switching signal will can act on the both sides of the first contactor Z1 control coil Z1L by the first choosing electricity interlocking line J1, the first contactor Z1 can be made to close by applying 24V voltage, then the A phase of the first power supply, C phase power supply signal just can send into motor-operating mechanism interlock circuit; Again because the initial condition of contactor is normally open, and the initial condition of long closed contact is normally off, can reverse with the state of long closed contact series coil along with the change of contactor state; So when the first contactor Z1 is closed time, the long closed contact of the second contactor Z2 must be normally off, then the second contactor Z2 must be normally open.
In like manner can reach a conclusion, the first contactor Z1 and the second contactor Z2, under free position, is merely able to have to be in a "on" position.
Like this, system at any time all can by electrical energy transfer to motor-operating mechanism interlock circuit.
When first performs switch A1 needs combined floodgate time, A phase line J4 will perform switch closing coil A1L by first enter into the input side that the second execution switch second normally-closed contact A2-b2 or the 3rd performs switch second normally-closed contact A3-b2, if now second perform switch A2 or the 3rd and perform in switch A3 and have to be in a disjunction state, second performs switch second normally-closed contact A2-b2 and the 3rd performs in switch second normally-closed contact A3-b2 and necessarily have to be in a closure state; So switch closing coil A1L both sides superposition A phase and C phase voltage will be performed first, so perform switch A1 to perform feed motion.
Can be learnt by above-mentioned workflow, if the first execution switch A1 can close a floodgate, then the second execution switch A2 or the 3rd performs in switch A3 and has to be in a disjunction state.So can learn that execution switch A1, A2, A3 are under free position, only have at most two switches to close, thus avoid the risk of two-way AC power parallel connection.
Claims (2)
1., for choosing electricity, the interlock of the automatic transfer switching electric appliance in 690V IT system, it is characterized in that: it comprises switching signal interlock circuit and motor-operating mechanism interlock circuit; Switching signal interlock circuit comprises: the first contactor Z1, the first contactor control coil Z1L, the first contactor normally-closed contact Z1-b1, the second contactor Z2, the second contactor control coil Z2L, the second contactor normally-closed contact Z2-b1, the first choosing electricity interlocking line J1 and second choosing electricity interlocking line J2;
Motor-operating mechanism interlock circuit comprises: first performs switch first normally-closed contact A1-b1, first performs switch second normally-closed contact A1-b2, first performs switch closing coil A1L, second performs switch first normally-closed contact A2-b1, second performs switch second normally-closed contact A2-b2, second performs switch closing coil A2L, 3rd performs switch first normally-closed contact A3-b1, 3rd performs switch second normally-closed contact A3-b2, 3rd performs switch closing coil A3L, C phase line J3, A phase line J4, first closes a floodgate interlocks line J5, second closes a floodgate interlocks line J6 and the 3rd combined floodgate interlocking line J7,
Wherein: the first contactor Z1 input side is connected with C with the A phase of the first power supply, the second contactor Z2 input side is connected with C with the A phase of second source; The outlet side of the second contactor Z2 is directly connected with A phase line J4 with C phase line J3;
First performs switch second normally-closed contact A1-b2 and second closes a floodgate and interlocks line J6 and be connected, first performs switch first normally-closed contact A1-b1 and the 3rd closes a floodgate and interlocks line J7 and be connected, second performs switch second normally-closed contact A2-b2 and first closes a floodgate and interlocks line J5 and be connected, second performs switch first normally-closed contact A2-b1 and second closes a floodgate and interlocks line J6 and be connected, 3rd performs switch second normally-closed contact A3-b2 and first closes a floodgate and interlocks line J5 and be connected, and the 3rd execution switch first normally-closed contact A3-b1 and the 3rd closes a floodgate and interlocks line J7 and be connected;
First performs switch closing coil A1L, second performs the input side that switch closing coil A2L, the 3rd performs switch closing coil A3L and is connected with A phase line J4, and outlet side closes a floodgate with first respectively and interlocks line J5, the 3rd and close a floodgate and interlock line J7, second and close a floodgate and interlock line J6 and be connected;
First choosing electricity interlocking line J1 is connected with the outlet side of the first contactor Z1 control coil Z1L and the input side of the second contactor normally-closed contact Z2-b1 respectively, and the second choosing electricity interlocking line J2 is connected with the outlet side of the second contactor control coil Z2L and the input side of the first contactor normally-closed contact Z1-b1 respectively;
First switching signal is connected with the second contactor normally-closed contact Z2-b1 output, and the second switching signal is connected with the first contactor normally-closed contact Z1-b1 output.
2. the electricity of the choosing for the automatic transfer switching electric appliance in 690V IT system according to claim 1, interlock, is characterized in that: the first described contactor Z1 and the second contactor Z2 are contained in the both sides of different execution circuit breakers respectively.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201310744017.3A CN103715759B (en) | 2013-12-25 | 2013-12-25 | Power selection and interlocking device of automatic change-over switch appliance used in 690V IT system |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201310744017.3A CN103715759B (en) | 2013-12-25 | 2013-12-25 | Power selection and interlocking device of automatic change-over switch appliance used in 690V IT system |
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| CN103715759B true CN103715759B (en) | 2015-07-15 |
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| CN104201765A (en) * | 2014-08-28 | 2014-12-10 | 合肥联信电源有限公司 | One-use one-spare power type emergency power source |
| CN104409255A (en) * | 2014-11-28 | 2015-03-11 | 国家电网公司 | Breaker |
| CN108492504B (en) * | 2018-03-12 | 2020-08-28 | 成都恒华电力科技咨询有限责任公司 | Circuit based on street lamp cable theftproof |
| CN109586292A (en) * | 2019-01-31 | 2019-04-05 | 中车株洲电力机车有限公司 | A kind of library power supply protection system |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN2445496Y (en) * | 1999-11-02 | 2001-08-29 | 徐卫河 | Spare power supply switching device |
| JP4432752B2 (en) * | 2004-11-30 | 2010-03-17 | トヨタ自動車株式会社 | Power supply system and vehicle |
| KR20080110561A (en) * | 2008-10-14 | 2008-12-18 | 이원강 | General load control type combined fire protection private power plant |
| CN203104088U (en) * | 2012-03-27 | 2013-07-31 | 厦门普罗太克科技有限公司 | Novel heavy current switching control device |
| CN102842958A (en) * | 2012-09-28 | 2012-12-26 | 任佶 | Mechanical-electronic hybrid double-power-supply automatic change-over switch |
| CN203660644U (en) * | 2013-12-25 | 2014-06-18 | 施耐德万高（天津）电气设备有限公司 | Power supply selection and interlocking device of automatic transfer switching equipment used in 690V IT system |
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