CN210156976U - Multi-path power supply intelligent switching device - Google Patents
Multi-path power supply intelligent switching device Download PDFInfo
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- CN210156976U CN210156976U CN201921370591.6U CN201921370591U CN210156976U CN 210156976 U CN210156976 U CN 210156976U CN 201921370591 U CN201921370591 U CN 201921370591U CN 210156976 U CN210156976 U CN 210156976U
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Abstract
The utility model relates to a multichannel power intelligent switching device, the device comprise main power supply, 1#, 2#, 3# stand-by power supply and power consumption load. Under normal conditions, the load is powered by the main power supply, and the conversion switches SA, SA1, SA2 and SA3 are all opened at the closed position; when the main power supply fails and has power failure, the device can automatically switch to a mode that a No. 1 standby power supply supplies power to a load; if the main power supply and the No. 1 standby power supply are not powered, the device can automatically switch to a mode that the No. 2 standby power supply supplies power to the load; if the main power supply, the 1# standby power supply and the 2# standby power supply are not powered, the device can automatically switch to a mode that the 3# standby power supply supplies power to the load; on the contrary, as long as any one of the front power supplies recovers power supply, the device can be automatically switched to a mode of supplying power by the front power supply, and the standby power supply behind the device automatically fails; if the power is off for maintenance, the change-over switch is turned to the off position; the utility model discloses can provide more reliable power supply for important load user.
Description
Technical Field
The utility model relates to an intelligent control field, especially a multichannel power intelligent switching device.
Background
With the arrival of the 4.0 era of industry, the automation level of each industry is continuously improved, and the requirement on the reliability of power utilization is higher and higher. The rapid development of various forms of electric energy such as thermal power, hydroelectric power, nuclear power, wind power, solar power generation and the like creates important conditions for the reliability of power utilization. However, in the case where a plurality of power supplies coexist, switching and sharing between the power supplies are still limited to some extent. Although there are many types of power supplies, each power supply has the possibility of a fault or power failure, which in turn has a certain effect on the user to a greater or lesser extent.
Whether the state enterprise, the civil enterprise or the private enterprise, even the small business, the private villa, the shopping mall, the high-rise residential elevator control, the living and fire-fighting water and the like do not want to have the condition of long-time power failure, as long as the power supply can be recovered as soon as possible, and the situation can be accepted for short power failure. With the improvement of living standard of people, the electricity consumption in a small range is increased, and even the self-sufficiency is realized by adopting small wind power and small solar power generation. In such a power utilization situation, there is often a problem of switching between the conventional power supply and the small power supply. To realize safe and automatic switching between different power supplies, a novel intelligent switching device for multiple power supplies is needed.
Disclosure of Invention
In view of this, the present invention provides an intelligent switching device for multiple power sources, which provides a reliable power supply for users.
The utility model discloses a following scheme realizes: the utility model provides a multichannel power intelligence auto-change over device which characterized in that: the system comprises a main power supply loop, a 1# standby power supply loop, a 2# standby power supply loop, a 3# standby power supply loop and an electric load loop; the main power supply loop comprises a main loop and a control loop; the main loop and the control loop are connected in parallel at the upper side of a main contact of the contactor KM; the 1# standby power supply loop comprises a 1# main loop and a 1# control loop; the 1# main loop and the 1# control loop are connected in parallel at the upper side of a main contact of the contactor KM 1; the 2# standby power supply loop comprises a 2# main loop and a 2# control loop; the 2# main loop and the 2# control loop are connected in parallel at the upper side of a main contact of a contactor KM 2; the 3# standby power supply loop comprises a 3# main loop and a 3# control loop; the 3# main loop and the 3# control loop are connected in parallel at the upper side of a main contact of the contactor KM 3; the power load loop comprises a power load main loop and a power load control loop; the electric load main loop and the electric load control loop are connected in parallel at the upper side of the thermal relay FR in the load main loop; the main power supply loop, the 1#, the 2# and the 3# standby power supply loops are connected in parallel at the load side and are connected in series with the electric load main loop;
further, the main circuit comprises a main power supply, an air switch QF and a fuse FULeft side ofFuse FURight sideA coil of the voltage relay KV and main contacts KM 1# and 2# of the alternating current contactor KM; the two ends of the upper side of the air switch QF are respectively connected with the L end and the N end of the main power supply, and the two ends of the lower side of the air switch QF are respectively connected with the fuse FULeft side ofAnd FURight sideThe upper ends of the two are connected in series; fuse FULeft side ofAnd FURight sideThe lower ends of the two-phase alternating current contactor are respectively connected with two ends of a KV coil of the voltage relay in parallel and are respectively connected with the upper ends of 1# and 2# main contacts of the alternating current contactor KM in series; the lower ends of the 1# and 2# main contacts of the alternating current contactor KM are respectively connected with the upper side of a thermal relay FR of the electric load main loop in series;
the control circuit comprises a fuse FU-1, a starting button SB1, a stopping button SB2, a normally open contact KV of a voltage relay KV, a1 st normally closed auxiliary contact KM1 of a 1# standby power supply control contactor KM1, a1 st normally closed auxiliary contact KM2 of a 2# standby power supply control contactor KM2, a1 st normally closed auxiliary contact KM3 of a 3# standby power supply control contactor KM3, an alternating current contactor KM coil, a1 st normally open auxiliary contact KM of the alternating current contactor KM, a change-over switch SA, a main power supply operation monitoring indicator lamp DY and a fuse FU-2;
the left end of the fuse FU-1 is connected with the left end of the KV coil of the voltage relay in parallel; the right end of the FU-1 is sequentially connected in series with a normally open contact of the starting button SB1, a normally closed contact of the stopping button SB2, a normally open contact KV of the voltage relay KV, a1 st normally closed auxiliary contact KM1 of a 1# standby power supply control contactor KM1, a1 st normally closed auxiliary contact KM2 of a 2# standby power supply control contactor KM2, a1 st normally closed auxiliary contact KM3 of a 3# standby power supply control contactor KM3 and the upper end of the coil of the contactor KM; the lower end of the contactor KM coil is connected with the right end of the fuse FU-2 in series; the left end of the FU-2 is connected with the right end of the KV coil of the voltage relay in parallel; the 1 st normally-open auxiliary contact KM, the transfer switch SA and the normally-open contact of the starting button SB1 of the contactor KM are connected in parallel; and the main power supply operation monitoring indicator DY is respectively connected in parallel with the lower end of the 1 st normally-open auxiliary contact KM of the contactor KM and the lower end of the coil of the contactor KM.
Further, the 1# main circuit comprises a 1# standby power supply, an air switch QF1 and a fuse FU1Left side ofFuse FU1Right sideA coil of the voltage relay KV1 and a 1# and 2# main contact KM1 of an alternating current contactor KM 1; the two ends of the upper side of the air switch QF1 are respectively connected with the L1 end and the N1 end of the 1# standby power supply, and the two ends of the lower side of the air switch QF1 are respectively connected with the fuse FU1Left side ofAnd FU1Right sideThe upper ends of the two are connected in series; said fuse FU1Left side ofAnd FU1Right sideThe lower ends of the two-phase alternating current contactor are respectively connected with two ends of a coil of a voltage relay KV1 in parallel and are respectively connected with the upper ends of main contacts No. 1 and No. 2 of the contactor KM1 in series; the lower ends of the 1# and 2# main contacts of the contactor KM1 are respectively connected in parallel with the lower ends of the 1# and 2# main contacts of the main power control contactor KM;
the 1# control loop comprises a fuse FU1-1, a transfer switch SA1, a normally open contact KV1 of a voltage relay KV1, a1 st normally closed contact KV of the voltage relay KV, a1 st normally closed auxiliary contact KM of a main power supply control contactor KM, a2 nd normally closed auxiliary contact KM2 of a 2# standby power supply control contactor KM2, a2 nd normally closed auxiliary contact KM3 of a 3# standby power supply control contactor KM3, an alternating current contactor KM1 coil, a1 st normally open auxiliary contact KM1 of an alternating current contactor KM1, a 1# standby power supply operation monitoring indicator DY1 and a fuse FU 1-2;
the left end of the fuse FU1-1 is connected with the left end of the KV1 coil in parallel; the right end of the FU1-1 is sequentially connected in series with the change-over switch SA1, a normally open contact KV1 of a voltage relay KV1, a1 st normally closed contact KV of the voltage relay KV, a1 st normally closed auxiliary contact KM of a main power supply control contactor KM, a2 nd normally closed auxiliary contact KM2 of a 2# standby power supply control contactor KM2, a2 nd normally closed auxiliary contact KM3 of a 3# standby power supply control contactor KM3 and the upper end of a coil of the contactor KM 1; the lower end of the coil of the contactor KM1 is connected with the right end of the fuse FU1-2 in series; the left end of the FU1-2 is connected with the right end of a KV1 coil of a voltage relay in parallel; the 1 st normally-open auxiliary contact KM1 of the contactor KM1 is connected in series with a 1# standby power supply operation monitoring indicator lamp DY1 and then is connected in parallel with the upper end of the change-over switch SA1 and the lower end of the coil of the contactor KM 1.
Further, the 2# main circuit comprises a 2# standby power supply, an air switch QF2 and a fuse FU2Left side ofFuse FU2Right sideA coil of the voltage relay KV2 and a 1# and 2# main contact KM2 of the contactor KM 2; the two ends of the upper side of the air switch QF2 are respectively connected with the L2 end and the N2 end of the 2# standby power supply, and the two ends of the lower side of the air switch QF2 are respectively connected with the fuse FU2Left side ofAnd FU2Right sideThe upper ends of the two are connected in series; said fuse FU2Left side ofAnd FU2Right sideThe lower ends of the two-phase alternating current contactor are respectively connected with two ends of a coil of a voltage relay KV2 in parallel and are respectively connected with the upper ends of main contacts No. 1 and No. 2 of the contactor KM2 in series; the lower ends of the 1# and 2# main contacts of the contactor KM2 are respectively connected in parallel with the lower ends of the 1# and 2# main contacts of the 1# standby power supply control contactor KM 1;
the 2# control loop comprises a fuse FU2-1, a transfer switch SA2, a normally open contact KV2 of a voltage relay KV2, a2 nd normally closed contact KV of the voltage relay KV, a1 st normally closed contact KV1 of the voltage relay KV1, a2 nd normally closed auxiliary contact KM of a main power control contactor KM, a2 nd normally closed auxiliary contact KM1 of a 1# standby power control contactor KM1, a3 rd normally closed auxiliary contact KM3 of a 3# standby power control contactor KM3, a coil of the contactor KM2, a1 st normally open auxiliary contact KM2 of the contactor KM2, a 2# standby power operation monitoring indicator lamp DY2 and a fuse FU 2-2;
the left end of the fuse FU2-1 is connected with the left end of the KV2 coil in parallel; the right end of the fuse FU2-1 is connected in series with the change-over switch SA2, a normally open contact KV2 of a voltage relay KV2, a2 nd normally closed contact KV of the voltage relay KV, a1 st normally closed contact KV1 of the voltage relay KV1, a2 nd normally closed auxiliary contact KM of a main power control contactor KM, a2 nd normally closed auxiliary contact KM1 of a 1# standby power control contactor KM1, a3 rd normally closed auxiliary contact KM3 of a 3# standby power control contactor KM3 and the upper end of a coil of the contactor KM2 in sequence; the lower end of the coil of the contactor KM2 is connected with the right end of the fuse FU2-2 in series; the left end of the FU2-2 is connected with the right end of a KV2 coil of a voltage relay in parallel; the 1 st normally-open auxiliary contact KM2 of the contactor KM2 is connected in series with a 2# standby power supply operation monitoring indicator lamp DY2 and then is connected in parallel with the upper end of the change-over switch SA2 and the lower end of the coil of the contactor KM 2.
Further, the 3# main circuit comprises a 3# standby power supply, an air switch QF3 and a fuse FU3Left side ofFuse FU3Right sideA coil of the voltage relay KV3 and a 1# and 2# main contact KM3 of the contactor KM 3; the two ends of the upper side of the air switch QF3 are respectively connected with the L3 end and the N3 end of the 3# standby power supply, and the two ends of the lower side of the air switch QF3 are respectively connected with the fuse FU3Left side ofAnd FU3Right sideThe upper ends of the two are connected in series; said fuse FU3Left side ofAnd FU3Right sideThe lower ends of the two-phase alternating current contactor are respectively connected with two ends of a coil of a voltage relay KV3 in parallel and are respectively connected with the upper ends of main contacts No. 1 and No. 2 of the contactor KM3 in series; the lower ends of the 1# and 2# main contacts of the contactor KM3 are respectively connected in parallel with the lower ends of the 1# and 2# main contacts of the 2# standby power supply control contactor KM 2;
the 3# control circuit comprises a fuse FU3-1, a transfer switch SA3, a normally open contact KV3 of a voltage relay KV3, a3 rd normally closed contact KV of the voltage relay KV, a2 nd normally closed contact KV1 of the voltage relay KV1, a1 st normally closed contact KV2 of a voltage relay 2, a3 rd normally closed auxiliary contact KM of a main power control contactor KM, a3 rd normally closed auxiliary contact KM1 of a 1# standby power control contactor KM1, a3 rd normally closed auxiliary contact KM2 of a 2# standby power control contactor KM2, a coil of the contactor KM3, a1 st normally open auxiliary contact KM3 of the contactor KM3, a 3# standby power operation monitoring indicator lamp DY3 and a fuse FU 3-2;
the left end of the fuse FU3-1 is connected with the left end of the KV3 coil in parallel; the right end of the fuse FU3-1 is connected in series with the change-over switch SA3, a normally open contact KV3 of a voltage relay KV3, a3 rd normally closed contact KV of the voltage relay KV, a2 nd normally closed contact KV1 of the voltage relay KV1, a1 st normally closed contact KV2 of a voltage relay KV2, a3 rd normally closed auxiliary contact KM of a main power supply control contactor KM, a3 rd normally closed auxiliary contact KM1 of a 1# standby power supply control contactor KM1, a3 rd normally closed auxiliary contact KM2 of a 2# standby power supply control contactor KM2 and the upper end of a coil of the contactor KM3 in sequence; the lower end of the coil of the contactor KM3 is connected with the right end of the fuse FU3-2 in series; the left end of the FU3-2 is connected with the right end of a KV3 coil of a voltage relay in parallel; the 1 st normally-open auxiliary contact KM3 of the contactor KM3 is connected in series with a 3# standby power supply operation monitoring indicator lamp DY3 and then is connected in parallel with the upper end of the change-over switch SA3 and the lower end of the coil of the contactor KM 4.
Further, the main circuit of the electric load comprises a thermal relay FR, a 1# main contact of a control contactor KM4 of the load circuit, a # 2 main contact, a load indicator lamp FZ and a load output; the left and right input ends of a thermal relay FR in the main circuit of the power load are respectively connected with the lower ends of a main contact KM No. 1 and No. 2 of a main power control contactor KM; the left and right output ends of the thermal relay FR are respectively connected with the upper ends of the 1# and 2# main contacts KM4 of the contactor KM4 in series; the lower ends of the 1# and 2# main contacts KM4 of the contactor KM4 are respectively connected with the two ends of a load indicator lamp FZ in parallel and are respectively connected with the output end of an electric load in series;
the power utilization load control loop comprises 2 nd normally-open auxiliary contacts KM, KM1, KM2 and KM3 of a fuse FU4-1, a main power control contactor KM, a 1# standby power control contactor KM1, a 2# standby power control contactor KM2 and a 3# standby power control contactor KM3 respectively, and further comprises 1 st normally-open auxiliary contact KM4 of the power utilization load control contactor KM4, a load loop operation monitoring indicator lamp DY4, a normally-closed contact FR of a thermal relay FR, a coil of the power utilization load control contactor KM4 and a fuse FU 4-2;
the upper end of the fuse FU4-1 is connected with the left end of the inlet of the electric load main loop FR in parallel; the lower end of the FU4-1 is sequentially connected in series with the 2 nd normally-open auxiliary contact KM of the main power control contactor KM, the normally-closed contact FR of the thermal relay FR and the left end of the coil of the load control contactor KM 4; the right end of the coil of the contactor KM4 is connected with the lower end of the fuse FU4-2 in series; the upper end of the FU4-2 is connected with the right end of the inlet of the electric load main loop FR in parallel; the 2 nd normally-open auxiliary contact points KM1, KM2 and KM3 of the 1# standby power supply control contactor KM1, the 2# standby power supply control contactor KM2 and the 3# standby power supply control contactor KM3 are connected in parallel with the 2 nd normally-open auxiliary contact point KM of the main power supply control contactor KM; the 1 st normally-open auxiliary contact KM4 of the load control contactor KM4 is connected in series with the load loop operation monitoring indicator lamp DY4 and then connected in parallel with the right end of the 2 nd normally-open auxiliary contact KM2 of the 2# standby power supply control contactor KM2 and the right end of the coil of the load control contactor KM 4.
Further, the invention also provides a working method of the multi-power intelligent switching device, which comprises the following steps:
in a normal operation mode, at the L, N input end of the main power supply, the L1 and N1 input ends of the 1# standby power supply, the L2 and N2 input ends of the 2# standby power supply and the L3 and N3 input ends of the 3# standby power supply are respectively externally connected with four different power supplies; the output end of the power load is externally connected with the power load;
closing an air switch QF of the main power supply loop, closing a normally open contact KV of a voltage relay in the main power supply control loop when a voltage is detected by the voltage relay KV of the main power supply loop, and opening the normally open contacts KV of the three standby power supply control loops; as the 1#, 2#, and 3# backup power supplies are not powered, the three backup power supply control contactors KM1, KM2, and KM3 do not act, and the respective 1 st normally closed auxiliary contacts KM1, KM2, and KM3 do not act, and continue to keep a closed state;
pressing a starting button SB1 of the main power control loop, attracting a coil of a control contactor KM of a main power in an electrified way, attracting main contacts KM 1# and 2# of the contactor KM immediately, closing a1 st normally open auxiliary contact KM of the contactor KM which is connected with the starting button SB1 in parallel to realize a self-locking function, and closing a2 nd normally open auxiliary contact KM of the contactor KM in the load control loop; because the load loop has no fault, the normally closed contact FR of the thermal relay is closed, the coil of the contactor KM4 of the load control loop is electrified and attracted, and the main contacts 1# and 2# of the KM4 of the load main loop are closed to supply power to the load; meanwhile, a monitoring indicator DY of the main power supply is turned on, and a monitoring indicator FZ of the load is also turned on; the normally closed auxiliary contacts of the contactors KM positioned in the 1#, 2#, and 3# standby power supply control loops are all opened, and form double interlocking with the normally closed contact of the opened voltage relay KV, so that any standby power supply is not started;
sequentially closing air switches QF1, QF2 and QF3 of main circuits of the 1#, 2#, and 3# standby power supplies respectively, detecting voltages by voltage relays KV1, KV2 and KV3 of the three standby power supplies respectively, closing corresponding normally open contacts respectively, and opening the normally closed contacts; then, all the transfer switches SA, SA1, SA2, SA3 are closed, in the main power control loop, the transfer switch SA short-circuits the self-locking contact KM of the contactor KM, and in the three standby power control loops, the respective transfer switches close the respective control loops.
Further, the following contents are also included: in a fault operation mode, when the main power supply fails and stops operating and the 1#, 2#, and 3# standby power supplies are powered on, the control contactor KM and the load control contactor KM4 of the main power supply can be automatically powered off and released, so that the load is powered off, the main power supply and the load monitoring indicator lamps DY and FZ are both extinguished, and the voltage relay KV of the main power supply is also automatically powered off and reset; the normally closed contact KV of the main power supply voltage relay and the normally closed auxiliary contact KM of the main power supply control contactor KM in the 1#, 2#, and 3# standby power supply control loops can be automatically reset and closed; the 2# and 3# standby power supplies are locked by the 1# standby power supply and cannot be started; at the moment, only the 1# standby power supply has the condition of automatically switching power transmission, and the coil of the contactor KM1 is controlled to be powered on and pulled in; the 1# and 2# main contacts KM1 of the contactor KM1 are immediately closed, the 1 st and 2 nd normally-open auxiliary contacts KM1 of the contactor are also closed, a monitoring indicator DY1 of a 1# standby power supply is lightened, a coil of a contactor KM4 of a load control loop is electrified and also attracted, the 1# and 2# main contacts KM4 of a load main loop KM4 are closed to re-restore power supply to a load, a monitoring indicator FZ of the load is lightened again, and a load operation monitoring indicator DY4 is lightened again;
further, the following contents are also included: if the main power supply and the 1# standby power supply are not powered, the 2# and 3# standby power supplies are powered, and the 3# standby power supply is locked by the 2# standby power supply, only the 2# standby power supply has the condition of automatically switching power transmission at the moment, and the load is restored to power supply by the 2# standby power supply; if the main power supply, the 1# standby power supply and the 2# standby power supply are not powered, only the 3# standby power supply is powered, and the condition of automatically switching power transmission is also met, the load resumes power supply from the 3# standby power supply.
Further, the following contents are also included: when the operation mode is recovered, in the state of the 3# standby power supply, if the 2# or 1# standby power supply recovers power transmission, the voltage relay KV2 or KV1 is electrified, the power supply of the 3# standby power supply is immediately opened by the normally closed contact of the voltage relay KV2 or KV1 and automatically cut off, then the corresponding normally closed contact KM3 of the control contactor KM3 of the 3# standby power supply closes and connects the starting loop of the 2# or 1# standby power supply, and the power supply of the load is automatically switched to the power supply of the 2# or 1# standby power supply; and no matter which way of standby power supply is used for supplying power, as long as the main power supply recovers power transmission, a voltage relay KV of the main power supply is electrified, a normally closed contact KV of the main power supply is immediately opened to automatically cut off the running standby power supply, and the power supply of a load is automatically switched to a mode of supplying power by the main power supply.
Further, the following contents are also included: when a load circuit breaks down, the thermal relay FR of the load main circuit acts, the normally closed contact FR of the thermal relay of the load control circuit is opened, at the moment, no matter the power is supplied by a main power supply or any standby power supply, the control contactor KM4 of the load circuit is automatically powered off and released, the load is powered off, and the DY4 monitoring indicator lamp is not turned on, so that the relay protection effect is achieved on the electric load.
Compared with the prior art, the utility model discloses following beneficial effect has:
the utility model discloses have the multichannel power intelligence switching power supply mode of fairly nimble, the four ways power can be the power of different systems, also can be the power of the different branches of same system, and the load can be single-phase load or the three-phase load of any form, can provide more reliable power supply for important power consumption user completely.
Drawings
Fig. 1 is a schematic circuit diagram according to an embodiment of the present invention.
Detailed Description
The present invention will be further explained with reference to the drawings and the embodiments.
As shown in fig. 1, the present embodiment provides an intelligent switching device for multiple power supplies, including a main power supply circuit, a 1# backup power supply circuit, a 2# backup power supply circuit, a 3# backup power supply circuit, and a power load circuit; the main power supply loop comprises a main loop and a control loop; the main loop and the control loop are connected in parallel at the upper side of a main contact of the contactor KM; the 1# standby power supply loop comprises a 1# main loop and a 1# control loop; the 1# main loop and the 1# control loop are connected in parallel at the upper side of a main contact of the contactor KM 1; the 2# standby power supply loop comprises a 2# main loop and a 2# control loop; the 2# main loop and the 2# control loop are connected in parallel at the upper side of a main contact of a contactor KM 2; the 3# standby power supply loop comprises a 3# main loop and a 3# control loop; the 3# main loop and the 3# control loop are connected in parallel at the upper side of a main contact of the contactor KM 3; the power load loop comprises a power load main loop and a power load control loop; the electric load main loop and the electric load control loop are connected in parallel at the upper side of the thermal relay FR in the load main loop; the main power supply loop, the 1#, the 2# and the 3# standby power supply loops are connected in parallel on the load side and are connected in series with the electric load main loop.
In this embodiment, the main circuit comprises a main power supply, an air switch QF, a fuse FULeft side ofFuse FURight sideA coil of the voltage relay KV and main contacts KM 1# and 2# of the alternating current contactor KM; the two ends of the upper side of the air switch QF are respectively connected with the L end and the N end of the main power supply, and the two ends of the lower side of the air switch QF are respectively connected with the fuse FULeft side ofAnd FURight sideThe upper ends of the two are connected in series; fuse FULeft side ofAnd FURight sideThe lower ends of the two-phase AC contactor are respectively connected with two ends of a KV coil of the voltage relay in parallel and are respectively connected with 1 of an AC contactor KMThe upper ends of the # and # 2 main connecting points are connected in series; the lower ends of the 1# and 2# main contacts of the alternating current contactor KM are respectively connected with the upper side of a thermal relay FR of the electric load main loop in series;
the control circuit comprises a fuse FU-1, a starting button SB1, a stopping button SB2, a normally open contact KV of a voltage relay KV, a1 st normally closed auxiliary contact KM1 of a 1# standby power supply control contactor KM1, a1 st normally closed auxiliary contact KM2 of a 2# standby power supply control contactor KM2, a1 st normally closed auxiliary contact KM3 of a 3# standby power supply control contactor KM3, an alternating current contactor KM coil, a1 st normally open auxiliary contact KM of the alternating current contactor KM, a change-over switch SA, a main power supply operation monitoring indicator lamp DY and a fuse FU-2;
the left end of the fuse FU-1 is connected with the left end of the KV coil of the voltage relay in parallel; the right end of the FU-1 is sequentially connected in series with a normally open contact of the starting button SB1, a normally closed contact of the stopping button SB2, a normally open contact KV of the voltage relay KV, a1 st normally closed auxiliary contact KM1 of a 1# standby power supply control contactor KM1, a1 st normally closed auxiliary contact KM2 of a 2# standby power supply control contactor KM2, a1 st normally closed auxiliary contact KM3 of a 3# standby power supply control contactor KM3 and the upper end of the coil of the contactor KM; the lower end of the contactor KM coil is connected with the right end of the fuse FU-2 in series; the left end of the FU-2 is connected with the right end of the KV coil of the voltage relay in parallel; the 1 st normally-open auxiliary contact KM, the transfer switch SA and the normally-open contact of the starting button SB1 of the contactor KM are connected in parallel; and the main power supply operation monitoring indicator DY is respectively connected in parallel with the lower end of the 1 st normally-open auxiliary contact KM of the contactor KM and the lower end of the coil of the contactor KM.
In the embodiment, the 1# main circuit comprises a 1# standby power supply, an air switch QF1 and a fuse FU1Left side ofFuse FU1Right sideA coil of the voltage relay KV1 and a 1# and 2# main contact KM1 of an alternating current contactor KM 1; the two ends of the upper side of the air switch QF1 are respectively connected with the L1 end and the N1 end of the 1# standby power supply, and the two ends of the lower side of the air switch QF1 are respectively connected with the fuse FU1Left side ofAnd FU1Right sideThe upper ends of the two are connected in series; said fuse FU1Left side ofAnd FU1Right sideThe lower ends of the two ends are respectively connected with two ends of a KV1 coil of the voltage relayThe contactor is connected in parallel and is respectively connected with the upper ends of the 1# and 2# main contacts of the contactor KM1 in series; the lower ends of the 1# and 2# main contacts of the contactor KM1 are respectively connected in parallel with the lower ends of the 1# and 2# main contacts of the main power control contactor KM;
the 1# control loop comprises a fuse FU1-1, a transfer switch SA1, a normally open contact KV1 of a voltage relay KV1, a1 st normally closed contact KV of the voltage relay KV, a1 st normally closed auxiliary contact KM of a main power supply control contactor KM, a2 nd normally closed auxiliary contact KM2 of a 2# standby power supply control contactor KM2, a2 nd normally closed auxiliary contact KM3 of a 3# standby power supply control contactor KM3, an alternating current contactor KM1 coil, a1 st normally open auxiliary contact KM1 of an alternating current contactor KM1, a 1# standby power supply operation monitoring indicator DY1 and a fuse FU 1-2;
the left end of the fuse FU1-1 is connected with the left end of the KV1 coil in parallel; the right end of the FU1-1 is sequentially connected in series with the change-over switch SA1, a normally open contact KV1 of a voltage relay KV1, a1 st normally closed contact KV of the voltage relay KV, a1 st normally closed auxiliary contact KM of a main power supply control contactor KM, a2 nd normally closed auxiliary contact KM2 of a 2# standby power supply control contactor KM2, a2 nd normally closed auxiliary contact KM3 of a 3# standby power supply control contactor KM3 and the upper end of a coil of the contactor KM 1; the lower end of the coil of the contactor KM1 is connected with the right end of the fuse FU1-2 in series; the left end of the FU1-2 is connected with the right end of a KV1 coil of a voltage relay in parallel; the 1 st normally-open auxiliary contact KM1 of the contactor KM1 is connected in series with a 1# standby power supply operation monitoring indicator lamp DY1 and then is connected in parallel with the upper end of the change-over switch SA1 and the lower end of the coil of the contactor KM 1.
In the embodiment, the 2# main circuit comprises a 2# standby power supply, an air switch QF2 and a fuse FU2Left side ofFuse FU2Right sideA coil of the voltage relay KV2 and a 1# and 2# main contact KM2 of the contactor KM 2; the two ends of the upper side of the air switch QF2 are respectively connected with the L2 end and the N2 end of the 2# standby power supply, and the two ends of the lower side of the air switch QF2 are respectively connected with the fuse FU2Left side ofAnd FU2Right sideThe upper ends of the two are connected in series; said fuse FU2Left side ofAnd FU2Right sideThe lower ends of the two ends of the coil are respectively connected with the two ends of the KV2 coil of the voltage relay in parallelAnd are respectively connected in series with the upper ends of the 1# and 2# main contacts of the contactor KM 2; the lower ends of the 1# and 2# main contacts of the contactor KM2 are respectively connected in parallel with the lower ends of the 1# and 2# main contacts of the 1# standby power supply control contactor KM 1;
the 2# control loop comprises a fuse FU2-1, a transfer switch SA2, a normally open contact KV2 of a voltage relay KV2, a2 nd normally closed contact KV of the voltage relay KV, a1 st normally closed contact KV1 of the voltage relay KV1, a2 nd normally closed auxiliary contact KM of a main power control contactor KM, a2 nd normally closed auxiliary contact KM1 of a 1# standby power control contactor KM1, a3 rd normally closed auxiliary contact KM3 of a 3# standby power control contactor KM3, a coil of the contactor KM2, a1 st normally open auxiliary contact KM2 of the contactor KM2, a 2# standby power operation monitoring indicator lamp DY2 and a fuse FU 2-2;
the left end of the fuse FU2-1 is connected with the left end of the KV2 coil in parallel; the right end of the fuse FU2-1 is connected in series with the change-over switch SA2, a normally open contact KV2 of a voltage relay KV2, a2 nd normally closed contact KV of the voltage relay KV, a1 st normally closed contact KV1 of the voltage relay KV1, a2 nd normally closed auxiliary contact KM of a main power control contactor KM, a2 nd normally closed auxiliary contact KM1 of a 1# standby power control contactor KM1, a3 rd normally closed auxiliary contact KM3 of a 3# standby power control contactor KM3 and the upper end of a coil of the contactor KM2 in sequence; the lower end of the coil of the contactor KM2 is connected with the right end of the fuse FU2-2 in series; the left end of the FU2-2 is connected with the right end of a KV2 coil of a voltage relay in parallel; the 1 st normally-open auxiliary contact KM2 of the contactor KM2 is connected in series with a 2# standby power supply operation monitoring indicator lamp DY2 and then is connected in parallel with the upper end of the change-over switch SA2 and the lower end of the coil of the contactor KM 2.
In the embodiment, the 3# main circuit comprises a 3# standby power supply, an air switch QF3 and a fuse FU3Left side ofFuse FU3Right sideA coil of the voltage relay KV3 and a 1# and 2# main contact KM3 of the contactor KM 3; the two ends of the upper side of the air switch QF3 are respectively connected with the L3 end and the N3 end of the 3# standby power supply, and the two ends of the lower side of the air switch QF3 are respectively connected with the fuse FU3Left side ofAnd FU3Right sideThe upper ends of the two are connected in series; the above-mentionedFuse FU3Left side ofAnd FU3Right sideThe lower ends of the two-phase alternating current contactor are respectively connected with two ends of a coil of a voltage relay KV3 in parallel and are respectively connected with the upper ends of main contacts No. 1 and No. 2 of the contactor KM3 in series; the lower ends of the 1# and 2# main contacts of the contactor KM3 are respectively connected in parallel with the lower ends of the 1# and 2# main contacts of the 2# standby power supply control contactor KM 2;
the 3# control circuit comprises a fuse FU3-1, a transfer switch SA3, a normally open contact KV3 of a voltage relay KV3, a3 rd normally closed contact KV of the voltage relay KV, a2 nd normally closed contact KV1 of the voltage relay KV1, a1 st normally closed contact KV2 of a voltage relay 2, a3 rd normally closed auxiliary contact KM of a main power control contactor KM, a3 rd normally closed auxiliary contact KM1 of a 1# standby power control contactor KM1, a3 rd normally closed auxiliary contact KM2 of a 2# standby power control contactor KM2, a coil of the contactor KM3, a1 st normally open auxiliary contact KM3 of the contactor KM3, a 3# standby power operation monitoring indicator lamp DY3 and a fuse FU 3-2;
the left end of the fuse FU3-1 is connected with the left end of the KV3 coil in parallel; the right end of the fuse FU3-1 is connected in series with the change-over switch SA3, a normally open contact KV3 of a voltage relay KV3, a3 rd normally closed contact KV of the voltage relay KV, a2 nd normally closed contact KV1 of the voltage relay KV1, a1 st normally closed contact KV2 of a voltage relay KV2, a3 rd normally closed auxiliary contact KM of a main power supply control contactor KM, a3 rd normally closed auxiliary contact KM1 of a 1# standby power supply control contactor KM1, a3 rd normally closed auxiliary contact KM2 of a 2# standby power supply control contactor KM2 and the upper end of a coil of the contactor KM3 in sequence; the lower end of the coil of the contactor KM3 is connected with the right end of the fuse FU3-2 in series; the left end of the FU3-2 is connected with the right end of a KV3 coil of a voltage relay in parallel; the 1 st normally-open auxiliary contact KM3 of the contactor KM3 is connected in series with a 3# standby power supply operation monitoring indicator lamp DY3 and then is connected in parallel with the upper end of the change-over switch SA3 and the lower end of the coil of the contactor KM 4.
In the embodiment, the main circuit of the electric load comprises a thermal relay FR, a 1# main contact of a control contactor KM4 of the load circuit, a # 2 main contact, a load indicator lamp FZ and a load output; the left and right input ends of a thermal relay FR in the main circuit of the power load are respectively connected with the lower ends of a main contact KM No. 1 and No. 2 of a main power control contactor KM; the left and right output ends of the thermal relay FR are respectively connected with the upper ends of the 1# and 2# main contacts KM4 of the contactor KM4 in series; the lower ends of the 1# and 2# main contacts KM4 of the contactor KM4 are respectively connected with the two ends of a load indicator lamp FZ in parallel and are respectively connected with the output end of an electric load in series;
the power utilization load control loop comprises 2 nd normally-open auxiliary contacts KM, KM1, KM2 and KM3 of a fuse FU4-1, a main power control contactor KM, a 1# standby power control contactor KM1, a 2# standby power control contactor KM2 and a 3# standby power control contactor KM3 respectively, and further comprises 1 st normally-open auxiliary contact KM4 of the power utilization load control contactor KM4, a load loop operation monitoring indicator lamp DY4, a normally-closed contact FR of a thermal relay FR, a coil of the power utilization load control contactor KM4 and a fuse FU 4-2;
the upper end of the fuse FU4-1 is connected with the left end of the inlet of the electric load main loop FR in parallel; the lower end of the FU4-1 is sequentially connected in series with the 2 nd normally-open auxiliary contact KM of the main power control contactor KM, the normally-closed contact FR of the thermal relay FR and the left end of the coil of the load control contactor KM 4; the right end of the coil of the contactor KM4 is connected with the lower end of the fuse FU4-2 in series; the upper end of the FU4-2 is connected with the right end of the inlet of the electric load main loop FR in parallel; the 2 nd normally-open auxiliary contact points KM1, KM2 and KM3 of the 1# standby power supply control contactor KM1, the 2# standby power supply control contactor KM2 and the 3# standby power supply control contactor KM3 are connected in parallel with the 2 nd normally-open auxiliary contact point KM of the main power supply control contactor KM; the 1 st normally-open auxiliary contact KM4 of the load control contactor KM4 is connected in series with the load loop operation monitoring indicator lamp DY4 and then connected in parallel with the right end of the 2 nd normally-open auxiliary contact KM2 of the 2# standby power supply control contactor KM2 and the right end of the coil of the load control contactor KM 4.
Preferably, the present embodiment further provides a working method of the multi-power intelligent switching device,
in a normal operation mode, at the L, N input end of the main power supply, the L1 and N1 input ends of the 1# standby power supply, the L2 and N2 input ends of the 2# standby power supply and the L3 and N3 input ends of the 3# standby power supply are respectively externally connected with four different power supplies; the output end of the power load is externally connected with the power load;
closing an air switch QF of the main power supply loop, closing a normally open contact KV of a voltage relay in the main power supply control loop when a voltage is detected by the voltage relay KV of the main power supply loop, and opening the normally open contacts KV of the three standby power supply control loops; as the 1#, 2#, and 3# backup power supplies are not powered, the three backup power supply control contactors KM1, KM2, and KM3 do not act, and the respective 1 st normally closed auxiliary contacts KM1, KM2, and KM3 do not act, and continue to keep a closed state;
pressing a starting button SB1 of the main power control loop, attracting a coil of a control contactor KM of a main power in an electrified way, attracting main contacts KM 1# and 2# of the contactor KM immediately, closing a1 st normally open auxiliary contact KM of the contactor KM which is connected with the starting button SB1 in parallel to realize a self-locking function, and closing a2 nd normally open auxiliary contact KM of the contactor KM in the load control loop; because the load loop has no fault, the normally closed contact FR of the thermal relay is closed, the coil of the contactor KM4 of the load control loop is electrified and attracted, and the main contacts 1# and 2# of the KM4 of the load main loop are closed to supply power to the load; meanwhile, a monitoring indicator DY of the main power supply is turned on, and a monitoring indicator FZ of the load is also turned on; the normally closed auxiliary contacts of the contactors KM positioned in the 1#, 2#, and 3# standby power supply control loops are all opened, and form double interlocking with the normally closed contact of the opened voltage relay KV, so that any standby power supply is not started;
sequentially closing air switches QF1, QF2 and QF3 of main circuits of the 1#, 2#, and 3# standby power supplies respectively, detecting voltages by voltage relays KV1, KV2 and KV3 of the three standby power supplies respectively, closing corresponding normally open contacts respectively, and opening the normally closed contacts; then, all the transfer switches SA, SA1, SA2, SA3 are closed, in the main power control loop, the transfer switch SA short-circuits the self-locking contact KM of the contactor KM, and in the three standby power control loops, the respective transfer switches close the respective control loops.
In this embodiment, the following contents are also included: in a fault operation mode, when the main power supply fails and stops operating and the 1#, 2#, and 3# standby power supplies are powered on, the control contactor KM and the load control contactor KM4 of the main power supply can be automatically powered off and released, so that the load is powered off, the main power supply and the load monitoring indicator lamps DY and FZ are both extinguished, and the voltage relay KV of the main power supply is also automatically powered off and reset; the normally closed contact KV of the main power supply voltage relay and the normally closed auxiliary contact KM of the main power supply control contactor KM in the 1#, 2#, and 3# standby power supply control loops can be automatically reset and closed; the 2# and 3# standby power supplies are locked by the 1# standby power supply and cannot be started; at the moment, only the 1# standby power supply has the condition of automatically switching power transmission, and the coil of the contactor KM1 is controlled to be powered on and pulled in; the 1# and 2# main contacts KM1 of the contactor KM1 are immediately closed, the 1 st and 2 nd normally-open auxiliary contacts KM1 of the contactor are also closed, a monitoring indicator DY1 of a 1# standby power supply is lightened, a coil of a contactor KM4 of a load control loop is electrified and also attracted, the 1# and 2# main contacts KM4 of a load main loop KM4 are closed to re-restore power supply to a load, a monitoring indicator FZ of the load is lightened again, and a load operation monitoring indicator DY4 is lightened again; if the main power supply and the 1# standby power supply are not powered, the 2# and 3# standby power supplies are powered, and the 3# standby power supply is locked by the 2# standby power supply, only the 2# standby power supply has the condition of automatically switching power transmission at the moment, and the load is restored to power supply by the 2# standby power supply; if the main power supply, the 1# standby power supply and the 2# standby power supply are not powered, only the 3# standby power supply is powered, and the condition of automatically switching power transmission is also met, the load resumes power supply from the 3# standby power supply.
In this embodiment, the following contents are also included: when the operation mode is recovered, in the state of the 3# standby power supply, if the 2# or 1# standby power supply recovers power transmission, the voltage relay KV2 or KV1 is electrified, the power supply of the 3# standby power supply is immediately opened by the normally closed contact of the voltage relay KV2 or KV1 and automatically cut off, then the corresponding normally closed contact KM3 of the control contactor KM3 of the 3# standby power supply closes and connects the starting loop of the 2# or 1# standby power supply, and the power supply of the load is automatically switched to the power supply of the 2# or 1# standby power supply; and no matter which way of standby power supply is used for supplying power, as long as the main power supply recovers power transmission, a voltage relay KV of the main power supply is electrified, a normally closed contact KV of the main power supply is immediately opened to automatically cut off the running standby power supply, and the power supply of a load is automatically switched to a mode of supplying power by the main power supply.
In this embodiment, the following contents are also included: when a load circuit breaks down, the thermal relay FR of the load main circuit acts, the normally closed contact FR of the thermal relay of the load control circuit is opened, at the moment, no matter the power is supplied by a main power supply or any standby power supply, the control contactor KM4 of the load circuit is automatically powered off and released, the load is powered off, and the DY4 monitoring indicator lamp is not turned on, so that the relay protection effect is achieved on the electric load.
Under the maintenance state, the change-over switch SA of the main power supply control circuit and the change-over switches SA1, SA2 and SA3 of the 1#, 2#, 3# standby power supply control circuits are sequentially disconnected, then, a stop button SB2 of the main power supply control circuit is pressed, the main power supply stops supplying power, the three standby power supplies do not act, and the load can be smoothly powered off; if only one path of standby power supply is needed to supply power to the load, the air switches of the main power supply and other standby power supplies are required to be completely disconnected, and then the change-over switch of the standby power supply control loop is switched on, so that the load can be normally supplied with power.
The power supply and control of the main power supply loop, the 1#, 2#, 3# three-way standby power supply loop, the electric load and the like can be in a single-phase form or a three-phase form.
In particular, in this embodiment, there is one main power supply, three or more standby power supplies, and the main power supply and the standby power supply can be switched, and the standby power supply can be switched. All switching is intelligent and automatic, and does not need any manual operation. Under normal conditions, the load is powered by the main power supply, and the change-over switches SA, SA1, SA2 and SA3 are all opened in a closed state; when the main power supply fails and has power failure, the device can automatically switch to a running mode that the 1# standby power supply supplies power to the load; if the main power supply and the No. 1 standby power supply are not powered, the device can automatically switch to the running mode that the No. 2 standby power supply supplies power to the load; if the main power supply, the 1# standby power supply and the 2# standby power supply are not powered, the device can automatically switch to an operation mode that the 3# standby power supply supplies power to the load; when the front standby power supply recovers the normal power supply, the device can be automatically switched to the mode of the standby power supply at the most front stage; if the main power supply is restored to normal power supply, the device can automatically switch to the running mode powered by the main power supply no matter which standby power supply supplies power. In addition, the device also has an operation mode of manual maintenance. The device can be used in one-way power supply mode, and can also be used in multi-way power supply modes such as two-way, three-way, four-way and the like, namely, the device has quite flexible multi-way power supply intelligent switching power supply mode, the four-way power supply can be the power supply of different systems, also can be the power supply of different branches of the same system, and can completely provide more reliable power supply for important power users.
It is worth mentioning that the utility model protects a hardware structure, as for the control method does not require protection. The above is only a preferred embodiment of the present invention. However, the present invention is not limited to the above embodiments, and any equivalent changes and modifications made according to the present invention do not exceed the scope of the present invention, and all belong to the protection scope of the present invention.
Claims (10)
1. The utility model provides a multichannel power intelligence auto-change over device which characterized in that: the system comprises a main power supply loop, a 1# standby power supply loop, a 2# standby power supply loop, a 3# standby power supply loop and an electric load loop; the main power supply loop comprises a main loop and a control loop; the main loop and the control loop are connected in parallel at the upper side of a main contact of the contactor KM; the 1# standby power supply loop comprises a 1# main loop and a 1# control loop; the 1# main loop and the 1# control loop are connected in parallel at the upper side of a main contact of the contactor KM 1; the 2# standby power supply loop comprises a 2# main loop and a 2# control loop; the 2# main loop and the 2# control loop are connected in parallel at the upper side of a main contact of a contactor KM 2; the 3# standby power supply loop comprises a 3# main loop and a 3# control loop; the 3# main loop and the 3# control loop are connected in parallel at the upper side of a main contact of the contactor KM 3; the power load loop comprises a power load main loop and a power load control loop; the electric load main loop and the electric load control loop are connected in parallel at the upper side of the thermal relay FR in the load main loop; the main power supply loop, the 1#, the 2# and the 3# standby power supply loops are all connected in parallel on the load side and are all connected in series with the electric load main loop.
2. The intelligent switching device of multi-power supply of claim 1, wherein: the main loop comprises a main power supply, an air switch QF and a fuse FULeft side ofFuse FURight sideA coil of the voltage relay KV and main contacts KM 1# and 2# of the alternating current contactor KM; the two ends of the upper side of the air switch QF are respectively connected with the L end and the N end of the main power supply, and the two ends of the lower side of the air switch QF are respectively connected with the fuse FULeft side ofAnd FURight sideThe upper ends of the two are connected in series; fuse FULeft side ofAnd FURight sideThe lower ends of the two-phase alternating current contactor are respectively connected with two ends of a KV coil of the voltage relay in parallel and are respectively connected with the upper ends of 1# and 2# main contacts of the alternating current contactor KM in series; the lower ends of the 1# and 2# main contacts of the alternating current contactor KM are respectively connected with the upper side of the thermal relay FR of the electric load main loop in series.
3. The intelligent switching device of multi-power supply of claim 1, wherein: the control circuit comprises a fuse FU-1, a starting button SB1, a stopping button SB2, a normally open contact KV of a voltage relay KV, a1 st normally closed auxiliary contact KM1 of a 1# standby power supply control contactor KM1, a1 st normally closed auxiliary contact KM2 of a 2# standby power supply control contactor KM2, a1 st normally closed auxiliary contact KM3 of a 3# standby power supply control contactor KM3, an alternating current contactor KM coil, a1 st normally open auxiliary contact KM of the alternating current contactor KM, a change-over switch SA, a main power supply operation monitoring indicator lamp DY and a fuse FU-2;
the left end of the fuse FU-1 is connected with the left end of the KV coil of the voltage relay in parallel; the right end of the FU-1 is sequentially connected in series with a normally open contact of the starting button SB1, a normally closed contact of the stopping button SB2, a normally open contact KV of the voltage relay KV, a1 st normally closed auxiliary contact KM1 of a 1# standby power supply control contactor KM1, a1 st normally closed auxiliary contact KM2 of a 2# standby power supply control contactor KM2, a1 st normally closed auxiliary contact KM3 of a 3# standby power supply control contactor KM3 and the upper end of the coil of the contactor KM; the lower end of the contactor KM coil is connected with the right end of the fuse FU-2 in series; the left end of the FU-2 is connected with the right end of the KV coil of the voltage relay in parallel; the 1 st normally-open auxiliary contact KM, the transfer switch SA and the normally-open contact of the starting button SB1 of the contactor KM are connected in parallel; and the main power supply operation monitoring indicator DY is respectively connected in parallel with the lower end of the 1 st normally-open auxiliary contact KM of the contactor KM and the lower end of the coil of the contactor KM.
4. The intelligent switching device of multi-power supply of claim 1, wherein: the 1# main loop comprises a 1# standby power supply, an air switch QF1 and a fuse FU1Left side ofFuse FU1Right sideA coil of the voltage relay KV1 and a 1# and 2# main contact KM1 of an alternating current contactor KM 1; the two ends of the upper side of the air switch QF1 are respectively connected with the L1 end and the N1 end of the 1# standby power supply, and the two ends of the lower side of the air switch QF1 are respectively connected with the fuse FU1Left side ofAnd FU1Right sideThe upper ends of the two are connected in series; said fuse FU1Left side ofAnd FU1Right sideThe lower ends of the two-phase alternating current contactor are respectively connected with two ends of a coil of a voltage relay KV1 in parallel and are respectively connected with the upper ends of main contacts No. 1 and No. 2 of the contactor KM1 in series; the lower ends of the 1# and 2# main contacts of the contactor KM1 are respectively connected in parallel with the lower ends of the 1# and 2# main contacts of the main power control contactor KM.
5. The intelligent switching device of multi-power supply of claim 1, wherein: the 1# control loop comprises a fuse FU1-1, a transfer switch SA1, a normally open contact KV1 of a voltage relay KV1, a1 st normally closed contact KV of the voltage relay KV, a1 st normally closed auxiliary contact KM of a main power supply control contactor KM, a2 nd normally closed auxiliary contact KM2 of a 2# standby power supply control contactor KM2, a2 nd normally closed auxiliary contact KM3 of a 3# standby power supply control contactor KM3, an alternating current contactor KM1 coil, a1 st normally open auxiliary contact KM1 of an alternating current contactor KM1, a 1# standby power supply operation monitoring indicator DY1 and a fuse FU 1-2;
the left end of the fuse FU1-1 is connected with the left end of the KV1 coil in parallel; the right end of the FU1-1 is sequentially connected in series with the change-over switch SA1, a normally open contact KV1 of a voltage relay KV1, a1 st normally closed contact KV of the voltage relay KV, a1 st normally closed auxiliary contact KM of a main power supply control contactor KM, a2 nd normally closed auxiliary contact KM2 of a 2# standby power supply control contactor KM2, a2 nd normally closed auxiliary contact KM3 of a 3# standby power supply control contactor KM3 and the upper end of a coil of the contactor KM 1; the lower end of the coil of the contactor KM1 is connected with the right end of the fuse FU1-2 in series; the left end of the FU1-2 is connected with the right end of a KV1 coil of a voltage relay in parallel; the 1 st normally-open auxiliary contact KM1 of the contactor KM1 is connected in series with a 1# standby power supply operation monitoring indicator lamp DY1 and then is connected in parallel with the upper end of the change-over switch SA1 and the lower end of the coil of the contactor KM 1.
6. The intelligent switching device of multi-power supply of claim 1, wherein:
the 2# main loop comprises a 2# standby power supply, an air switch QF2 and a fuse FU2Left side ofFuse FU2Right sideA coil of the voltage relay KV2 and a 1# and 2# main contact KM2 of the contactor KM 2; the two ends of the upper side of the air switch QF2 are respectively connected with the L2 end and the N2 end of the 2# standby power supply, and the two ends of the lower side of the air switch QF2 are respectively connected with the fuse FU2Left side ofAnd FU2Right sideThe upper ends of the two are connected in series; said fuse FU2Left side ofAnd FU2Right sideThe lower ends of the two-phase alternating current contactor are respectively connected with two ends of a coil of a voltage relay KV2 in parallel and are respectively connected with the upper ends of main contacts No. 1 and No. 2 of the contactor KM2 in series; the lower ends of the 1# and 2# main contacts of the contactor KM2 are respectively connected in parallel with the lower ends of the 1# and 2# main contacts of the 1# standby power supply control contactor KM 1.
7. The intelligent switching device of multi-power supply of claim 1, wherein:
the 2# control loop comprises a fuse FU2-1, a transfer switch SA2, a normally open contact KV2 of a voltage relay KV2, a2 nd normally closed contact KV of the voltage relay KV, a1 st normally closed contact KV1 of the voltage relay KV1, a2 nd normally closed auxiliary contact KM of a main power control contactor KM, a2 nd normally closed auxiliary contact KM1 of a 1# standby power control contactor KM1, a3 rd normally closed auxiliary contact KM3 of a 3# standby power control contactor KM3, a coil of the contactor KM2, a1 st normally open auxiliary contact KM2 of the contactor KM2, a 2# standby power operation monitoring indicator lamp DY2 and a fuse FU 2-2;
the left end of the fuse FU2-1 is connected with the left end of the KV2 coil in parallel; the right end of the fuse FU2-1 is connected in series with the change-over switch SA2, a normally open contact KV2 of a voltage relay KV2, a2 nd normally closed contact KV of the voltage relay KV, a1 st normally closed contact KV1 of the voltage relay KV1, a2 nd normally closed auxiliary contact KM of a main power control contactor KM, a2 nd normally closed auxiliary contact KM1 of a 1# standby power control contactor KM1, a3 rd normally closed auxiliary contact KM3 of a 3# standby power control contactor KM3 and the upper end of a coil of the contactor KM2 in sequence; the lower end of the coil of the contactor KM2 is connected with the right end of the fuse FU2-2 in series; the left end of the FU2-2 is connected with the right end of a KV2 coil of a voltage relay in parallel; the 1 st normally-open auxiliary contact KM2 of the contactor KM2 is connected in series with a 2# standby power supply operation monitoring indicator lamp DY2 and then is connected in parallel with the upper end of the change-over switch SA2 and the lower end of the coil of the contactor KM 2.
8. The intelligent switching device of multi-power supply of claim 1, wherein:
the 3# main loop comprises a 3# standby power supply, an air switch QF3 and a fuse FU3Left side ofFuse FU3Right sideA coil of the voltage relay KV3 and a 1# and 2# main contact KM3 of the contactor KM 3; the two ends of the upper side of the air switch QF3 are respectively connected with the L3 end and the N3 end of the 3# standby power supply, and the two ends of the lower side of the air switch QF3 are respectively connected with the fuse FU3Left side ofAnd FU3Right sideThe upper ends of the two are connected in series; said fuse FU3Left side ofAnd FU3Right sideThe lower ends of the two-phase alternating current contactor are respectively connected with two ends of a coil of a voltage relay KV3 in parallel and are respectively connected with the upper ends of main contacts No. 1 and No. 2 of the contactor KM3 in series; the lower ends of the 1# and 2# main contacts of the contactor KM3 are respectively connected in parallel with the lower ends of the 1# and 2# main contacts of the 2# standby power supply control contactor KM2。
9. The intelligent switching device of claim 1, wherein the 3# control circuit comprises a fuse FU3-1, a transfer switch SA3, a normally open contact KV3 of a voltage relay KV3, a3 rd normally closed contact KV of the voltage relay KV, a2 nd normally closed contact KV1 of the voltage relay KV1, a1 st normally closed contact KV2 of the voltage relay KV2, a3 rd normally closed auxiliary contact KM of the main power control contactor KM, a3 rd normally closed auxiliary contact KM1 of the 1# backup power control contactor KM1, a3 rd normally closed auxiliary contact KM2 of the 2# backup power control contactor KM2, a coil of the contactor KM3, a1 st auxiliary contact KM3 of the contactor KM3, a 3# backup power operation monitoring indicator DY3, and a fuse FU 3-2;
the left end of the fuse FU3-1 is connected with the left end of the KV3 coil in parallel; the right end of the fuse FU3-1 is connected in series with the change-over switch SA3, a normally open contact KV3 of a voltage relay KV3, a3 rd normally closed contact KV of the voltage relay KV, a2 nd normally closed contact KV1 of the voltage relay KV1, a1 st normally closed contact KV2 of a voltage relay KV2, a3 rd normally closed auxiliary contact KM of a main power supply control contactor KM, a3 rd normally closed auxiliary contact KM1 of a 1# standby power supply control contactor KM1, a3 rd normally closed auxiliary contact KM2 of a 2# standby power supply control contactor KM2 and the upper end of a coil of the contactor KM3 in sequence; the lower end of the coil of the contactor KM3 is connected with the right end of the fuse FU3-2 in series; the left end of the FU3-2 is connected with the right end of a KV3 coil of a voltage relay in parallel; the 1 st normally-open auxiliary contact KM3 of the contactor KM3 is connected in series with a 3# standby power supply operation monitoring indicator lamp DY3 and then is connected in parallel with the upper end of the change-over switch SA3 and the lower end of the coil of the contactor KM 4.
10. The intelligent switching device of multi-power supply of claim 1, wherein:
the electric load main loop comprises a thermal relay FR, main contacts 1#, 2# of a control contactor KM4 of the load loop, a load indicator lamp FZ and a load output; the left and right input ends of a thermal relay FR in the main circuit of the power load are respectively connected with the lower ends of a main contact KM No. 1 and No. 2 of a main power control contactor KM; the left and right output ends of the thermal relay FR are respectively connected with the upper ends of the 1# and 2# main contacts KM4 of the contactor KM4 in series; the lower ends of the 1# and 2# main contacts KM4 of the contactor KM4 are respectively connected with the two ends of a load indicator lamp FZ in parallel and are respectively connected with the output end of an electric load in series;
the power utilization load control loop comprises 2 nd normally-open auxiliary contacts KM, KM1, KM2 and KM3 of a fuse FU4-1, a main power control contactor KM, a 1# standby power control contactor KM1, a 2# standby power control contactor KM2 and a 3# standby power control contactor KM3 respectively, and further comprises 1 st normally-open auxiliary contact KM4 of the power utilization load control contactor KM4, a load loop operation monitoring indicator lamp DY4, a normally-closed contact FR of a thermal relay FR, a coil of the power utilization load control contactor KM4 and a fuse FU 4-2;
the upper end of the fuse FU4-1 is connected with the left end of the inlet of the electric load main loop FR in parallel; the lower end of the FU4-1 is sequentially connected in series with the 2 nd normally-open auxiliary contact KM of the main power control contactor KM, the normally-closed contact FR of the thermal relay FR and the left end of the coil of the load control contactor KM 4; the right end of the coil of the contactor KM4 is connected with the lower end of the fuse FU4-2 in series; the upper end of the FU4-2 is connected with the right end of the inlet of the electric load main loop FR in parallel; the 2 nd normally-open auxiliary contact points KM1, KM2 and KM3 of the 1# standby power supply control contactor KM1, the 2# standby power supply control contactor KM2 and the 3# standby power supply control contactor KM3 are connected in parallel with the 2 nd normally-open auxiliary contact point KM of the main power supply control contactor KM; the 1 st normally-open auxiliary contact KM4 of the load control contactor KM4 is connected in series with the load loop operation monitoring indicator lamp DY4 and then connected in parallel with the right end of the 2 nd normally-open auxiliary contact KM2 of the 2# standby power supply control contactor KM2 and the right end of the coil of the load control contactor KM 4.
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110417114A (en) * | 2019-08-22 | 2019-11-05 | 厦门大学嘉庚学院 | A kind of multiple power supplies device for intelligently switching and its working method |
| CN111864737A (en) * | 2020-07-23 | 2020-10-30 | 国网北京市电力公司 | Device and method for quickly switching load of festoon lamp |
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2019
- 2019-08-22 CN CN201921370591.6U patent/CN210156976U/en active Active
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110417114A (en) * | 2019-08-22 | 2019-11-05 | 厦门大学嘉庚学院 | A kind of multiple power supplies device for intelligently switching and its working method |
| CN110417114B (en) * | 2019-08-22 | 2024-06-21 | 厦门大学嘉庚学院 | Intelligent switching device for multiple power supplies and working method thereof |
| CN111864737A (en) * | 2020-07-23 | 2020-10-30 | 国网北京市电力公司 | Device and method for quickly switching load of festoon lamp |
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