A kind of hydroelectric machine control circuit of wearing
Technical field:
The utility model relates to a kind of control circuit, especially a kind of hydroelectric machine control circuit of wearing.
Background technology:
In the prior art, technique known be wear hydroelectric machine all be manually control or by Frequency Converter Control, misoperation appears during manual operation easily, and frequency conversion to transfer the power frequency time to longer, starting current all can produce great impact to electrical network and motor; By Frequency Converter Control, all be motor of a Frequency Converter Control, cost is bigger, and this is the existing in prior technology weak point.
Summary of the invention:
The purpose of this utility model, be exactly at the existing in prior technology deficiency, and a kind of technical scheme of wearing the hydroelectric machine control circuit is provided, the hydroelectric machine control circuit of wearing of this scheme passes through three motors of a Frequency Converter Control, avoid misoperation, and saved cost.
This programme is realized by following technical measures: a kind of hydroelectric machine control circuit of wearing; comprise the frequency converter (BPQ) that input is connected with the phase line of three-phase electricity; the output of described frequency converter (BPQ) is connected with three phase electric machine; the characteristics of this programme are: the output (U of frequency converter (BPQ); V; W) the interlock normally opened contact by first contactor (KM1) is connected with first three phase electric machine (M1) with the first time-delay limiting protector (FR1); described output (U; V; W) also the interlock normally opened contact by second contactor (KM2) is connected with second three phase electric machine (M2) with second limiting protector (FR2); also have the 3rd three phase electric machine (M3) by the interlock normally opened contact of the 3rd contactor (KM3) and the output (U of the 3rd limiting protector (FR3) and frequency converter (BPQ); V; W) connect; the FC end of frequency converter (BPQ) is connected with a phase line by first circuit breaker (QF1) with the KA end; the KB end of frequency converter (BPQ) is connected with zero line by first current relay (KA1); the FB end of frequency converter (BPQ) is connected with zero line by second current relay (KA2); be connected with first normally opened contact of first contactor (KM1) between the DCM end of frequency converter (BPQ) and the FOR end; in parallel after the first normally opened contact parallel connection of first normally opened contact of second contactor (KM2) and the 3rd contactor (KM3) with second normally opened contact of first contactor (KM1); described first three phase electric machine (M1) also is connected with three phase lines of three-phase electricity with second circuit breaker (QF2) by the interlock normally opened contact of the 4th contactor (KM4); described second three phase electric machine (M2) is connected with three phase lines of three-phase electricity with the 3rd circuit breaker (QF3) by the interlock normally opened contact of the 5th contactor (KM5), and described the 3rd three phase electric machine (M3) is connected with three live wires of three-phase electricity with the 4th circuit breaker (QF4) by the interlock normally opened contact of the 6th contactor (KM6).The control circuit of first three phase electric machine (M1) is: also be connected to the 3rd current relay (KA3) parallel with one another, first contactor (KM1), the 4th current relay (KA4), very first time relay (KT1), the 4th contactor (KM4), first indicator light (HL1), second indicator light (HL2) and the 3rd indicator light (HL3) between a phase line and zero line; Also be connected in series first normally opened contact of the 3rd current relay (KA3) and the normally-closed contact of the 4th current relay (KA4) between described the 3rd current relay (KA3) and the described phase line; first normally-closed contact series connection back of first button (SB1) and first current relay (KA1) is in parallel with first normally opened contact of the 3rd current relay (KA3); also be serially connected with first normally-closed contact of the 4th contactor (KM4) and second normally opened contact of the 3rd current relay (KA3) between described first contactor (KM1) and the described phase line; also be serially connected with first normally opened contact of the 4th current relay (KA4) between described the 4th current relay (KA4) and the described phase line; the normally closed switch of the 3rd button (SB3) and first limiting protector (FR1); first normally opened contact of second current relay (KA2) and second button (SB2) series connection back are in parallel with first normally opened contact of the 4th current relay (KA4); connect between described very first time relay (KT1) and the phase line second normally opened contact of the 4th current relay (KA4); also be in series with the normally-closed contact of first contactor (KM1) and the normally opened contact of very first time relay (KT1) between described the 4th contactor (KM4) and the described phase line; also be in series with second normally opened contact of first contactor (KM1) between described first indicator light (HL1) and the described phase line; also be connected in series second normally-closed contact of the 4th contactor (KM4) and second normally-closed contact of first contactor (KM1) between also connect between described second indicator light (HL2) and the described phase line normally opened contact of the 4th contactor (KM4), described the 3rd indicator light (HL3) and described phase line.The control circuit of second three phase electric machine (M2): between a phase line and zero line, also be connected to the 5th current relay (KA5) parallel with one another, second contactor (KM2), the 6th current relay (KA6), second time relay (KT2), the 5th contactor (KM5), the 4th indicator light (HL4), the 5th indicator light (HL5) and the 6th indicator light (HL6); Also be connected in series first normally opened contact of the 5th current relay (KA5) and the normally-closed contact of the 6th current relay (KA6) between described the 5th current relay (KA5) and the described phase line; second normally-closed contact series connection back of the 4th button (SB4) and first current relay (KA1) is in parallel with first normally opened contact of the 5th current relay (KA5); also be serially connected with first normally-closed contact of the 5th contactor (KM5) and second normally opened contact of the 5th current relay (KA5) between described second contactor (KM2) and the described phase line; also be serially connected with first normally opened contact of the 6th current relay (KA6) between described the 6th current relay (KA6) and the described phase line; the normally closed switch of the 6th button (SB6) and second limiting protector (FR2); second normally opened contact of second current relay (KA2) and the 5th button (SB5) series connection back are in parallel with first normally opened contact of the 6th current relay (KA6); connect between described second time relay (KT2) and the phase line second normally opened contact of the 6th current relay (KA6); also be in series with the normally-closed contact of second contactor (KM2) and the normally opened contact of second time relay (KT2) between described the 5th contactor (KM5) and the described phase line; also be in series with second normally opened contact of second contactor (KM2) between described the 4th indicator light (HL4) and the described phase line; also connect between also connect between described the 5th indicator light (HL5) and the described phase line normally opened contact of the 5th contactor (KM5), described the 6th indicator light (HL6) and described phase line second normally-closed contact of the 5th contactor (KM5) and second normally-closed contact of second contactor (KM2).The control circuit of the 3rd three phase electric machine (M3): between a phase line and zero line, also be connected to the 7th current relay (KA7) parallel with one another, the 3rd contactor (KM3), the 8th current relay (KA8), the 3rd time relay (KT3), the 6th contactor (KM6), the 7th indicator light (HL7), the 8th indicator light (HL8) and the 9th indicator light (HL9); Also be connected in series first normally opened contact of the 7th current relay (KA7) and the normally-closed contact of the 8th current relay (KA8) between described the 7th current relay (KA7) and the described phase line; the 3rd normally-closed contact series connection back of the 7th button (SB7) and first current relay (KA1) is in parallel with first normally opened contact of the 7th current relay (KA7); also be serially connected with first normally-closed contact of the 6th contactor (KM6) and second normally opened contact of the 7th current relay (KA7) between described the 3rd contactor (KM3) and the described phase line; also be serially connected with first normally opened contact of the 8th current relay (KA8) between described the 8th current relay (KA8) and the described phase line; the normally closed switch of the 9th button (SB9) and the 3rd limiting protector (FR3); the 3rd normally opened contact of second current relay (KA2) and the 8th button (SB8) series connection back are in parallel with first normally opened contact of the 8th current relay (KA8); connect between described the 3rd time relay (KT3) and the phase line second normally opened contact of the 8th current relay (KA8); also be in series with the normally-closed contact of the 3rd contactor (KM3) and the normally opened contact of the 3rd time relay (KT3) between described the 6th contactor (KM6) and the described phase line; also be in series with second normally opened contact of the 3rd contactor (KM3) between described the 7th indicator light (HL7) and the described phase line; also connect between also connect between described the 8th indicator light (HL8) and the described phase line normally opened contact of the 6th contactor (KM6), described the 9th indicator light (HL9) and described phase line second normally-closed contact of the 6th contactor (KM6) and second normally-closed contact of the 3rd contactor (KM3).Described frequency converter (BPQ) is the skj Series Frequency Converter.
The beneficial effect of this programme can be learnt according to the narration to such scheme, owing in this scheme, control three motors simultaneously by a frequency converter (BPQ), when saving cost, energy better controlled machine operation, avoided the influence of misoperation, and motor is also shorter from the time that frequency conversion transfers power frequency to, and corresponding indicator light is arranged in circuit motor and electrical network, can show the corresponding work state, avoid dangerous generation.This shows that the utility model compared with prior art has substantive distinguishing features and progress, the beneficial effect of its enforcement also is conspicuous.
Description of drawings:
Fig. 1 is the electrical schematic diagram of the utility model embodiment.
Fig. 2 is the control circuit of first three phase electric machine.
Fig. 3 is the control circuit of second three phase electric machine.
Fig. 4 is the control circuit of the 3rd three phase electric machine.
Embodiment:
For clearly demonstrating the technical characterstic of this programme,, and, this programme is set forth in conjunction with its accompanying drawing below by an embodiment.
By accompanying drawing as can be seen; this programme wear the hydroelectric machine control circuit; comprise the frequency converter (BPQ) that input is connected with the phase line of three-phase electricity; the output of described frequency converter (BPQ) is connected with three phase electric machine; it is characterized in that: the output (U of frequency converter (BPQ); V; W) the interlock normally opened contact (KM1-1) by first contactor (KM1) is connected with first three phase electric machine (M1) with the first time-delay limiting protector (FR1); described output (U; V; W) also the interlock normally opened contact (KM2-1) by second contactor (KM2) is connected with second three phase electric machine (M2) with second limiting protector (FR2); also have the 3rd three phase electric machine (M3) by the interlock normally opened contact (KM3-1) of the 3rd contactor (KM3) and the output (U of the 3rd limiting protector (FR3) and frequency converter (BPQ); V; W) connect; the FC end of frequency converter (BPQ) is connected with a phase line by first circuit breaker (QF1) with the KA end; the KB end of frequency converter (BPQ) is connected with zero line by first current relay (KA1); the FB end of frequency converter (BPQ) is connected with zero line by second current relay (KA2); be connected with first normally opened contact (KM1-2-1) of first contactor (KM1) between the DCM end of frequency converter (BPQ) and the FOR end; first normally opened contact (KM2-2-1) of second contactor (KM2) and first normally opened contact (KM3-2-1) of the 3rd contactor (KM3) back in parallel is in parallel with second normally opened contact (KM1-2-1) of first contactor (KM1); described first three phase electric machine (M1) also is connected with three phase lines of three-phase electricity with second circuit breaker (QF2) by the interlock normally opened contact (KM4-1) of the 4th contactor (KM4); described second three phase electric machine (M2) is connected with three phase lines of three-phase electricity with the 3rd circuit breaker (QF3) by the interlock normally opened contact (KM5-1) of the 5th contactor (KM5), and described the 3rd three phase electric machine (M3) is connected with three live wires of three-phase electricity with the 4th circuit breaker (QF4) by the interlock normally opened contact (KM6-1) of the 6th contactor (KM6).The control circuit of first three phase electric machine (M1) is: also be connected to the 3rd current relay (KA3) parallel with one another, first contactor (KM1), the 4th current relay (KA4), very first time relay (KT1), the 4th contactor (KM4), first indicator light (HL1), second indicator light (HL2) and the 3rd indicator light (HL3) between a phase line and zero line; Also be connected in series first normally opened contact (KA3-2-1) of the 3rd current relay (KA3) and the normally-closed contact (KA4-3) of the 4th current relay (KA4) between described the 3rd current relay (KA3) and the described phase line; first normally-closed contact (KA1-1) the series connection back of first button (SB1) and first current relay (KA1) is in parallel with first normally opened contact (KA3-2-1) of the 3rd current relay (KA3); also be serially connected with first normally-closed contact (KM4-3-1) of the 4th contactor (KM4) and second normally opened contact (KA3-2-2) of the 3rd current relay (KA3) between described first contactor (KM1) and the described phase line; also be serially connected with first normally opened contact (KA4-2-1) of the 4th current relay (KA4) between described the 4th current relay (KA4) and the described phase line; the normally closed switch (FR1-1) of the 3rd button (SB3) and first limiting protector (FR1); first normally opened contact (KA2-1) of second current relay (KA2) and second button (SB2) series connection back and first normally opened contact of the 4th current relay (KA4) (KA4-2-1) in parallel; connect between described very first time relay (KT1) and the phase line second normally opened contact (KA4-2-2) of the 4th current relay (KA4); also be in series with the normally-closed contact (KM1-3-1) of first contactor (KM1) and the normally opened contact (KT1-2) of very first time relay (KT1) between described the 4th contactor (KM4) and the described phase line; also be in series with second normally opened contact (KM1-2-2) of first contactor (KM1) between described first indicator light (HL1) and the described phase line; also be connected in series second normally-closed contact (KM4-3-2) of the 4th contactor (KM4) and second normally-closed contact (KM1-3-2) of first contactor (KM1) between also connect between described second indicator light (HL2) and the described phase line normally opened contact (KM4-2) of the 4th contactor (KM4), described the 3rd indicator light (HL3) and described phase line.The control circuit of second three phase electric machine (M2): between a phase line and zero line, also be connected to the 5th current relay (KA5) parallel with one another, second contactor (KM2), the 6th current relay (KA6), second time relay (KT2), the 5th contactor (KM5), the 4th indicator light (HL4), the 5th indicator light (HL5) and the 6th indicator light (HL6); Also be connected in series first normally opened contact (KA5-2-1) of the 5th current relay (KA5) and the normally-closed contact (KA6-3) of the 6th current relay (KA6) between described the 5th current relay (KA5) and the described phase line; second normally-closed contact (KA1-2) the series connection back of the 4th button (SB4) and first current relay (KA1) is in parallel with first normally opened contact (KA5-2-1) of the 5th current relay (KA5); also be serially connected with first normally-closed contact (KM5-3-1) of the 5th contactor (KM5) and second normally opened contact (KA5-2-2) of the 5th current relay (KA5) between described second contactor (KM2) and the described phase line; also be serially connected with first normally opened contact (KA6-2-1) of the 6th current relay (KA6) between described the 6th current relay (KA6) and the described phase line; the normally closed switch (FR2-1) of the 6th button (SB6) and second limiting protector (FR2); second normally opened contact (KA2-2) of second current relay (KA2) and the 5th button (SB5) series connection back are in parallel with first normally opened contact (KA6-2-1) of the 6th current relay (KA6); connect between described second time relay (KT2) and the phase line second normally opened contact (KA6-2-2) of the 6th current relay (KA6); also be in series with the normally-closed contact (KM2-3-1) of second contactor (KM2) and the normally opened contact (KT2-2) of second time relay (KT2) between described the 5th contactor (KM5) and the described phase line; also be in series with second normally opened contact (KM2-2-2) of second contactor (KM2) between described the 4th indicator light (HL4) and the described phase line; also connect between also connect between described the 5th indicator light (HL5) and the described phase line normally opened contact (KM5-2) of the 5th contactor (KM5), described the 6th indicator light (HL6) and described phase line second normally-closed contact (KM5-3-2) of the 5th contactor (KM5) and second normally-closed contact (KM2-3-2) of second contactor (KM2).The control circuit of the 3rd three phase electric machine (M3): between a phase line and zero line, also be connected to the 7th current relay (KA7) parallel with one another, the 3rd contactor (KM3), the 8th current relay (KA8), the 3rd time relay (KT3), the 6th contactor (KM6), the 7th indicator light (HL7), the 8th indicator light (HL8) and the 9th indicator light (HL9); Also be connected in series first normally opened contact (KA7-2-1) of the 7th current relay (KA7) and the normally-closed contact (KA8-3) of the 8th current relay (KA8) between described the 7th current relay (KA7) and the described phase line; the 3rd normally-closed contact (KA1-3) the series connection back of the 7th button (SB7) and first current relay (KA1) is in parallel with first normally opened contact (KA7-2-1) of the 7th current relay (KA7); also be serially connected with first normally-closed contact (KM6-3-1) of the 6th contactor (KM6) and second normally opened contact (KA7-2-2) of the 7th current relay (KA7) between described the 3rd contactor (KM3) and the described phase line; also be serially connected with first normally opened contact (KA8-2-1) of the 8th current relay (KA8) between described the 8th current relay (KA8) and the described phase line; the normally closed switch (FR3-1) of the 9th button (SB9) and the 3rd limiting protector (FR3); the 3rd normally opened contact (KA2-3) of second current relay (KA2) and the 8th button (SB8) series connection back are in parallel with first normally opened contact (KA8-2-1) of the 8th current relay (KA8); connect between described the 3rd time relay (KT3) and the phase line second normally opened contact (KA8-2-2) of the 8th current relay (KA8); also be in series with the normally-closed contact (KM3-3-1) of the 3rd contactor (KM3) and the normally opened contact (KT3-2) of the 3rd time relay (KT3) between described the 6th contactor (KM6) and the described phase line; also be in series with second normally opened contact (KM3-2-2) of the 3rd contactor (KM3) between described the 7th indicator light (HL7) and the described phase line; also connect between also connect between described the 8th indicator light (HL8) and the described phase line normally opened contact (KM6-2) of the 6th contactor (KM6), described the 9th indicator light (HL9) and described phase line second normally-closed contact (KM6-3-2) of the 6th contactor (KM6) and second normally-closed contact (KM3-3-2) of the 3rd contactor (KM3).Described frequency converter (BPQ) is the skj Series Frequency Converter.During work, the FOR end of frequency converter (BPQ) is frequency converter operation output for frequency converter (BPQ) operation input, KA, KB, during frequency converter (BPQ) operation, first current relay (KA1), DCM is a common port, FC, FB be frequency converter (BPQ) output frequency to reach setpoint frequency be output, second current relay (KA2) when frequency converter (BPQ) arrives setpoint frequency; When starting first three phase electric machine (M1), press first button (SB1), the 3rd current relay (KA3), first contactor (KM1), start frequency converter (BPQ) simultaneously, and first current relay (KA1), first normally-closed contact (KA1-1) of first current relay (KA1) disconnects, at this moment, restart second three phase electric machine (M2) and the 3rd three phase electric machine (M3) can not work, second button (SB2) is the operation start button, frequency converter (BPQ) is before running to setpoint frequency, second current relay (KA2) must not, first normally opened contact (KA2-1) of second current relay (KA2) disconnects, first three phase electric machine (M1) can not transfer power frequency to, when frequency converter (BPQ) when running to setpoint frequency, second current relay (KA2), first normally opened contact (KA2-1) closure of second current relay (KA2), press second button (SB2) this moment, the 4th current relay (KA4), first contactor (KM1) dead electricity, frequency converter (BPQ) stops automatically, very first time relay (KT1) starts simultaneously, after reaching the time of the time relay (KT1) setting, the 4th relay (KM4) gets electric, and first three phase electric machine (M1) is worked under power frequency, after pressing the 3rd button (SB3), first three phase electric machine (M1) quits work.The course of work of other two motors is identical with first three phase electric machine (M1).