CN2099403U

CN2099403U - Automatic switch device of 380 v. power source of three-phase

Info

Publication number: CN2099403U
Application number: CN 91215899
Authority: CN
Inventors: 圻兵; 吴河; 王荫桐; 徐宁; 黄询石
Original assignee: SHANGHAI RAILWAY COLLEGE
Current assignee: Signal Equipment Factory,Shanghai Railway College
Priority date: 1991-09-13
Filing date: 1991-09-13
Publication date: 1992-03-18

Abstract

The utility model discloses an automatic switch device of three-phase 380V power sources, which can automatically track a main power supply source and automatically detect phase sequence, phase voltage, phase lack, and the automatic switch of a main and a spare two-way power supply and can realize over-current protection. The utility model is characterized in that the whole device is composed of twelve parts: a voltage sampling part, a current sampling part, a phase lack control part, an over-voltage control part, a phase-sequence control part, an over-current control part, an automatic switch part, a time-base circuit part, a power supply part, a link-jump control part, an electrical interlocking part and a counting circuit part. The main and the spare two ways are respectively provided with the twelve parts; the main power source is especially used by an electric interlocking apparatus for supplying power one stage; the spare power source supplies power for various users; when the faults of the main power source occur, the spare power source is automatically switched.

Description

Automatic switch device of 380 V. power source of three-phase

The utility model relates to the non-electricity protector in railway signal technology field; also can use in other three phase supply fields; be specifically follow the trail of automatically main electricity, automatically detect phase sequence, press mutually, phase shortage, the moving a kind of device that switches and realize overcurrent protection of active and standby road power supply.

Railway transportation occupies status of crucial importance in Chinese national economy; unblocked for guaranteeing railway transportation; must guarantee the non-stop run of railway signal electric horn interlocking apparatus; its prerequisite provides uninterrupted power supply; yet in actual condition through regular meeting because low, the phase shortage of phase pressure drop, phase sequence mistake make power supply that obstacle take place; remain artificial treatment, transportation can not normally be played a role, national economy is brought about great losses.

The purpose of this utility model provides to be led, when being equipped with the power supply of two-way power supply, main power source is the special-purpose one-level power supply of electric horn interlocking apparatus, stand-by power source is multiple user's power supply, in the arbitrary phase shortage that takes place mutually of main power source, force down mutually in or the overshoot value, stop the main power source power supply during phase sequence mistake immediately, automatic switchover is powered by stand-by power source, main power source is once recovering normal, automatically follow the trail of the main power source power supply immediately, switching time is short, can not influence the uninterrupted utilization of electric horn interlocking apparatus, and main power source be carried out phase current detect, move to stand-by power source certainly when overcurrent takes place, after certain time-delay, recover the main power source power supply again, recur overcurrent and cut off current supply circuit automatically, record forces down mutually automatically, superpressure, the phase sequence mistake, the overcurrent number of times, and, guarantee a kind of three-phase 380V automatic power-supply switch of one tunnel power supply to active and standby two road power supplys implementation machinery and electric dual interlock.

For finishing the technical scheme that above-mentioned purpose takes is to adopt digital integrated circuit to realize.Whole device by voltage sample, current sample, phase shortage control, superpressure control, phase sequence control, cross current control, automatic switchover, time-base circuit, power supply, connect and jump control, electrical interlock and 12 parts of counting circuit and constitute.Active and standby current supply circuit respectively has 12 above-mentioned parts of a cover, and active and standby power supply can be switched mutually.Wherein the voltage sampling circuit cross-over connection is gathered between each phase line mutually and to be pressed, and moves phase shortage control, superpressure control, phase sequence control circuit respectively through rectification, shaping, finishes the record that comprises phase shortage, superpressure and the phase sequence mistake forced down mutually in setting and carries out function.Current sampling circuit is established sampling resistor and is connected in series into current supply circuit, directly gathers the current supply circuit current value, finishes the record of electric current and carries out function through rectification, shaping action over-current control circuit.Phase shortage is identical with two kinds of circuit structures of superpressure control, is finished respectively mutually and the record of superpressure and execution function by integrated circuit.Each phase phase sequence that voltage collection circuit is gathered all focuses on the phase sequence control circuit, whether the detection phase sequence is correct, and in time handles, and automatic switch-over circuit is established optocoupler and contactor, carries out active and standby two road automatic switching functions.The time of overcurrent delay recovery time and relevant sequencing control is realized that by time-base circuit time-base circuit is made up of crystal oscillator, frequency divider, counter.Power circuit provides whole required power supplys, comprises the 12V stabilized voltage power supply of integrated package use and the 220V AC power that contactor uses, and when the contactor continuous chattering, jumps the back manual reversion to be repaired of control circuit cut-out control switching circuit by connecting.The electrical interlock circuit is finished active and standby two-way and can only be guaranteed by one road electrical interlock that inserts power supply simultaneously, and all active and standby roads phase shortages take place, are forced down mutually, the switching times of superpressure, phase sequence mistake, overcurrent is finished record in order to investigating by counting circuit.Active and standby two-way working condition and circuit are in full accord.

The utility model embodiment is described in detail in conjunction with the accompanying drawings.

Fig. 1 is voltage sampling circuit figure;

Fig. 2 is current sampling circuit figure;

Fig. 3 is phase shortage control circuit figure;

Fig. 4 is superpressure control circuit figure;

Fig. 5 is phase sequence control circuit figure;

Fig. 6 is over-current control circuit figure;

Fig. 7 is automatic switch-over circuit figure;

Fig. 8 is time-base circuit figure;

Fig. 9 is a power circuit diagram;

Figure 10 jumps control circuit figure for connecting;

Figure 11 is the electrical interlock circuit diagram;

Figure 12 is a counting circuitry;

Figure 13 is the utility model circuit diagram.

The utility model is established active and standby duplex feeding loop, the two-way circuit is identical omits the power backup road here, as accompanying drawing 13, can switch and all be provided with voltage sample, current sample, phase shortage control, superpressure control, phase sequence control mutually, cross current control, automatic switchover, time-base circuit, power supply, connect jump control, electrical interlock and counting circuit totally ten two parts form.

1, voltage sampling circuit such as Fig. 1 and shown in Figure 13, by resistance R 1-1～R1-8, R1-10～R1-11 capacitor C 1-1, bridge rectifier D 1-1～D1-4, diode D1-19 photocoupler T1-1～T1-3 forms.Sampling resistor R1-1～R1-3 cross-over connection separates high-pressure section and control loop in current supply circuit, photocoupler the high-pressure section of sampled voltage control photoelectrical coupler.And determine that its triode portion is that conducting is to control corresponding next stage control circuit.The every cover of all establishing mutually of voltage sampling circuit.

2, current sampling circuit such as Fig. 2 and shown in Figure 13.Form by sampling resistor R1-10, bridge rectifier D 1-5～D1-8, capacitor C 1-2, resistance R 1-12～R1-14, photoelectrical coupler T1-4.Sampling resistor R1-0 seals in each phase current supply circuit, directly gathers the current supply circuit current value, behind rectifying and wave-filtering, with photocoupler T1-4 high voltage supply loop and control loop is separated.According to whether conducting of sample rate current value decision T1-4, with control next stage over-current control circuit.The every cover of all establishing mutually of current sampling circuit.

3, phase shortage control circuit such as Fig. 3 and shown in Figure 13.Form when phase shortage (comprising that the phase pressure drop is low to moderate setting) by resistance R 1-15,1/6 4,069 3 of R1-16 capacitor C 1-3 integrated package T1-5,1/3 4,073 1 of 1/6 4,069 2 of T1-8, T1-7,1/2 4,013 1 of T1-11, T1-9 triode TIP110, diode D1-9 and relay J 1, make energy generator upset, the work of control automatic switch-over circuit, make the action of triode T1-9 conducting counting circuit simultaneously once.

4, superpressure control circuit such as Fig. 4 and shown in Figure 13, form by resistance R 1-17,1/6 4,069 3 of T1-18 capacitor C 1-4 integrated package T1-6,1/3 4,073 1 of 1/6 4,069 2 of T1-8, T1-7,1/2 4,013 1 of T1-11, T1-10 triode TIP110, diode D1-10 and relay J 2, operation principle is identical with the phase shortage control circuit, only controls the magnitude of voltage difference.

5, phase sequence control circuit such as Fig. 5 and shown in Figure 13, form by resistance R 1-19,1/6 4,069 3 of R1-20 capacitor C 1-5 integrated package T1-5,1/4 4,011 4 of 1/6 4,069 2 of T1-8, T1-12, triode T1-28 and light-emitting diode H1, when the phase sequence mistake takes place, utilize the syntagmatic of NAND gate to make triode T1-28 conducting, control automatic switch-over circuit and light-emitting diode pipe H1 is lighted by T1-8.

6, over-current control circuit such as Fig. 6 and shown in Figure 13 are made up of resistance R 1-21～R1-24, capacitor C 1-6,1/6 4,069 3 of C1-7 diode D1-17 integrated package T1-6,1/3 4,075 1 of 1/6 4,069 3 of T1-14, T1-13,1/2 4,013 1 of 1/4 4,071 1 of T1-15, T1-16, triode T1-17 TIP110, light-emitting diode H and relay J3.When overcurrent reached the standard for manual sampling value, because the work of trigger upset control automatic switch-over circuit, the H lamp extinguished, and triode T1-17 turn-offs, and made relay J 3 overcurrent of counting circuit record of cutting off the electricity supply.Simultaneously time-base circuit begins counting with the 2HZ frequency, picks up the recovery normal power supply once more to regulation relay recovery time, and all digital integrated circuits all restore.

7, automatic switch-over circuit such as Fig. 7 and shown in Figure 13, by resistance R 1-15, R1-16, R1-25～R1-27,1/2 4,082 1 of capacitor C 1-8 integrated package T1-19, T1-21 3041 photocouplers, T1-22 bidirectional triode thyristor, T1-20 triode TIP110 and B connect and can form by device.When any required switching signal was arranged, the conducting of T1-20 triode, also conducting of photocoupler made the contactor action, realized that active and standby road changes automatically.

8, time-base circuit such as Fig. 8 and shown in Figure 13 are made up of resistance R 1-28～R1-30, capacitor C 1-9, C1-10 crystal oscillator G, frequency divider T1-23 4060 counter T1-24 4020,1/6 4,069 1 of T1-15 and light-emitting diode H2.By the 32.768KHZ crystal oscillator through 2 ¹⁴Frequency division output 2HZ reference signal is as the new reference signal of this practicality, and output time is regulated the different taps of available T1-24 and connected realization.

9, power circuit such as Fig. 9 and shown in Figure 13, by transformer DB, bridge rectifier D 1-15～D1-18, capacitor C 1-13, C1-14 and three terminal integrated voltage stabilizer T1-27 7812 form.It comprises alternating current 220V power supply that uses for contactor and the 12V stabilized voltage power supply of using for whole relays, digital circuit.

10, even jump control circuit such as Figure 10 and shown in Figure 13, form by resistance R 1-35, R1-36,1/6 4,069 2 of 1/2 4,013 1 of capacitor C 1-12 integrated package T1-16, T1-14,1/4 4,081 3 of T1-25 4520, T1-26, diode D1-14 and light-emitting diode U.

11, electrical interlock circuit such as Figure 11 and shown in Figure 13 are made up of 1/6 4,069 1 of resistance R 1-34, integrated package T1-14 and photocoupler T1-28.The C end ground connection of main road makes T1-28 not conducting all the time, the operate as normal of protection main road.Be equipped with road C termination main road D end, main road operate as normal D is a high level, makes road T1-28 conducting fully, and the T1-13 output low level keeps being equipped with the road automatic switch-over circuit and can not work.

12, counting circuit such as Figure 12 and shown in Figure 13 are made up of diode D1-15, D1-16, relay tip and JI1, three counters of JI2, JI3, to write down superpressure respectively, the running order of overcurrent.

Above-mentioned active and standby two-way is respectively established 12 parts and is formed an automatic power-supply switch, and main power source is the special-purpose one-level power supply of electric horn interlocking apparatus, and stand-by power source is multiple user's power supply.

Claims

1, a kind of by power supply, sample circuit, time-base circuit, connect and jump control, the three-phase 380V automatic power-supply switch that counting circuit is formed, it is characterized in that being provided with identical two-way master, being equipped with current supply circuit also can switch mutually, main, be equipped with two-way and all establish voltage sample, current sample, phase shortage control, superpressure control, phase sequence control, cross current control, automatically switch, time-base circuit, power supply, connect and jump control, electrical interlock, 12 parts of counting circuit are formed, wherein a, voltage sampling circuit is by resistance R 1-1～R1-8 and R1-10～R1-11, capacitor C 1-1, bridge rectifier D 1-1～D1-4, diode D1-19, the photoelectricity coupling is managed T1-1～T1-3 entirely and is formed; B, current sampling circuit are made up of resistance R 1-10, bridge rectifier D 1-5～D1-8, capacitor C 1-2, resistance R 1-12～R1-14, photoelectrical coupler T1-4; C, phase shortage control circuit are made up of resistance R 1-15 and R1-16, capacitor C 1-3,1/6 4,069 2 of 1/6 4,069 3 of integrated package T1-5, T1-8,1/2 4,013 1 of 1/3 4,073 1 of T1-7, T1-11, T1-9 triode TIP110, diode D1-9 and relay J 1; D, superpressure control circuit are made up of resistance R 1-17 and R1-18, capacitor C 1-4,1/6 4,069 2 of 1/6 4,069 3 of integrated package T1-6, T1-8,1/2 4,013 1 of 1/3 4,073 1 of T1-7, T1-11, T1-10 triode TIP110, diode D1-10 and relay J 2; E, phase sequence control circuit are made up of resistance R 1-19, R1-20,1/6 4,069 3 of capacitor C 1-5, integrated package T1-5,1/4 4,011 4 of 1/6 4,069 2 of T1-8, T1-12, triode T1-28 and light-emitting diode H1; F, over-current control circuit are made up of resistance R 1-21～R1-24, capacitor C 1-6 and C1-7, diode D1-17,1/6 4,069 3 of 1/6 4,069 3 of integrated package T1-6, T1-14,1/4 4,071 1 of 1/3 4,075 1 of T1-13, T1-15,1/2 4,013 1 of T1-16, triode T1-17TIP110, light-emitting diode H and relay J 3; G, automatic switch-over circuit are made up of resistance T1-15～R1-27, capacitor C 1-8, one of integrated package T1-191/24082, T1-213041 photocoupler, T1-22 bidirectional triode thyristor, T1-20 triode TIP110 and B contactor; H, time-base circuit are made up of resistance R 1-28～R1-30, capacitor C 1-9 and C1-10, crystal oscillator G, frequency divider T1-33 4060, counter T1-24 4020,1/6 4,069 1 of T1-15 and light-emitting diode H2; I, power circuit are made up of transformer DB, bridge rectifier D 1-15～D1-18, capacitor C 1-13 and C1-14, three terminal integrated voltage stabilizer T1-27 7812; J, company jump control circuit and are made up of resistance R 1-35 and R1-36, capacitor C 1-12,1/6 4,069 2 of 1/2 4,013 1 of integrated package T1-16, T1-14,1/4 4,081 3 of T1-25 4520 T1-26, diode D1-14 and light-emitting diode U; K, electrical interlock circuit are made up of 1/6 4,069 1 of resistance R 1-34, integrated package T1-14 and photocoupler T1-28; L, counting circuit are made up of diode D1-15 and D1-16, relay tip and JI1, three counters of JI2, JI3.