CN219643651U - Interlocking device for UPS inverter and external maintenance bypass - Google Patents
Interlocking device for UPS inverter and external maintenance bypass Download PDFInfo
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- CN219643651U CN219643651U CN202320255282.4U CN202320255282U CN219643651U CN 219643651 U CN219643651 U CN 219643651U CN 202320255282 U CN202320255282 U CN 202320255282U CN 219643651 U CN219643651 U CN 219643651U
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Abstract
The utility model provides an interlocking device of a UPS inverter and an external maintenance bypass, comprising: a first circuit, a second circuit, and a third circuit; the first loop includes: the first unit comprises a normally-closed contact of the UPS inverter, and the second unit is a switching-on circuit of an external maintenance bypass; the second loop includes: the third unit comprises an external maintenance bypass normally open contact, and the fourth unit comprises a UPS output normally open contact and a control element which are connected in series; the third loop includes: normally closed contacts of control elements connected in series and UPS inverter control boards; the first loop is connected or disconnected, the external maintenance bypass is connected and normally works or cannot be started, the third loop is disconnected or connected, and the UPS inverter control panel cannot be started or normally works. The utility model can realize the automatic interlocking of the UPS inverter and the external maintenance bypass, and prevent the risk caused by misoperation.
Description
Technical Field
The utility model relates to the technical field of circuit systems, in particular to an interlocking device of a UPS inverter and an external maintenance bypass.
Background
The standard high-voltage power distribution cabinet has five-prevention function protection, low voltage can be electrically or mechanically interlocked to prevent misoperation, and no electrical or mechanical protection function exists between the UPS inverter and the low-voltage power distribution cabinet at present.
The conventional common solution for avoiding manual misoperation is to add a state change-over switch on a secondary control circuit of an external maintenance bypass breaker, add a mechanical lock switch on a secondary circuit of a power distribution cabinet, add a mechanical lock on the external maintenance breaker and the like to avoid misoperation. However, the proposal in the prior art still has the problem that the automatic interlocking of the misoperation inverter and the external maintenance bypass in emergency cannot be avoided because the interlocking device is a mechanical lock, so that the general misoperation can be prevented only.
Therefore, how to realize the automatic interlocking of the inverter and the external maintenance bypass, and prevent the risk caused by misoperation is a problem to be solved urgently.
Disclosure of Invention
The utility model provides an interlocking device of a UPS inverter and an external maintenance bypass, which is used for solving the defect that automatic interlocking of the inverter and the external maintenance bypass is difficult to realize in the prior art and achieving the purpose of preventing risks caused by misoperation.
The utility model provides an interlocking device of a UPS inverter and an external maintenance bypass, comprising: a first loop, a second loop and a third loop which are mutually connected in parallel are arranged between the UPS inverter and the external maintenance bypass;
the first loop includes: the first unit comprises a normally-closed contact of the UPS inverter, and the second unit is a closing circuit of the external maintenance bypass;
the second circuit includes: a third unit and a fourth unit in series, the third unit comprising an external service bypass normally open contact, the fourth unit comprising a UPS output normally open contact and a control element in series;
the third loop includes: the control element normally-closed contact is connected in series with the UPS inverter control board;
the first loop is connected or disconnected, the external maintenance bypass is connected or cannot be started, the third loop is disconnected or connected, and the UPS inverter control board cannot be started or normally works so as to realize interlocking of the UPS inverter and the external maintenance bypass.
According to the interlocking device of the UPS inverter and the external maintenance bypass, the number of the UPS inverters is a plurality of;
the first unit comprises a plurality of normally-closed contacts of the UPS inverters which are sequentially connected in series, and each normally-closed contact of the UPS inverter corresponds to one UPS inverter respectively.
According to the interlocking device of the UPS inverter and the external maintenance bypass, the number of the UPS inverters is a plurality of;
the fourth unit comprises a plurality of subunits connected in parallel, each subunit comprises a UPS output normally open contact and a control element which are connected in series, and each UPS output normally open contact corresponds to one UPS inverter respectively.
According to the interlocking device of the UPS inverter and the external maintenance bypass, the number of the third loops is multiple, and each third loop corresponds to one subunit respectively; each third loop comprises a group of control element normally-closed contacts connected in series and a UPS inverter control board, wherein the group of control element normally-closed contacts correspond to the control elements in the corresponding subunits, and the group of UPS inverter control boards correspond to the inverters corresponding to the corresponding subunits.
According to the interlocking device of the UPS inverter and the external maintenance bypass, the third loop further comprises an inverter switch, and the inverter switch, the normally-closed contact of the control element and the UPS inverter control board are mutually connected in series.
According to the interlocking device of the UPS inverter and the external maintenance bypass, one ends of the first loop and the second loop are connected with any three-phase line of external power supply equipment, and the other ends of the first loop and the second loop are connected with a ground line.
According to the utility model, there is provided an interlock device for a UPS inverter and an external maintenance bypass, the second unit comprising: and the external maintenance bypass switch-on button is connected in series with the external maintenance bypass breaker switch-on coil.
According to the interlocking device of the UPS inverter and the external maintenance bypass, the normally-closed contact of the UPS inverter is the normally-closed contact of the static switch of the UPS inverter.
According to the interlocking device of the UPS inverter and the external maintenance bypass, the control element is a relay.
According to the interlocking device of the UPS inverter and the external maintenance bypass, the control element is a Programmable Logic Controller (PLC).
According to the interlocking device of the UPS inverter and the external maintenance bypass, the first loop, the second loop and the third loop are in a conducting or disconnecting state by controlling the conducting or disconnecting of the normally open contact of the external maintenance bypass, the normally open contact of the UPS output and the normally closed contact of the UPS inverter, so that the external maintenance bypass is in a working or stopping state, and accordingly, the inverter control board is in a stopping or working state. The utility model can realize the automatic interlocking of the UPS inverter and the external maintenance bypass, and prevent the risk caused by misoperation.
Drawings
In order to more clearly illustrate the utility model or the technical solutions of the prior art, the following description will briefly explain the drawings used in the embodiments or the description of the prior art, and it is obvious that the drawings in the following description are some embodiments of the utility model, and other drawings can be obtained according to the drawings without inventive effort for a person skilled in the art.
FIG. 1 is one of the circuit diagrams of an interlock for a UPS inverter and an external service bypass provided by the present utility model;
fig. 2 is a second circuit diagram of an interlock for a UPS inverter and an external service bypass provided by the present utility model.
Reference numerals:
110: normally-closed contacts of the UPS inverter; 120: a closing circuit of an external maintenance bypass; 130: an external maintenance bypass normally open contact; 140: a normally open contact is output by the UPS; 150: a control element; 160: a control element normally closed contact; 170: an inverter control board; 180: an inverter switch; 210: normally-closed contacts of the UPS inverter; 220: a normally open contact is output by the UPS; 230: a control element; 240: normally closed contacts of the control element; 250: a UPS inverter control board; 260: an inverter switch; 310: an external maintenance bypass closing button; 320: and (5) externally maintaining the switching-on coil of the bypass breaker.
Detailed Description
For the purpose of making the objects, technical solutions and advantages of the present utility model more apparent, the technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings, and it is apparent that the described embodiments are some embodiments of the present utility model, not all embodiments. All other embodiments, which can be made by those skilled in the art based on the embodiments of the utility model without making any inventive effort, are intended to be within the scope of the utility model.
The terms involved in the present utility model are explained as follows:
UPS: an uninterruptible power supply.
An inverter: and the direct current is converted into the alternating current converter with fixed frequency and fixed voltage.
A circuit breaker: switching device capable of switching on, carrying and off a current in a normal loop condition and capable of switching on, carrying and off a current in an abnormal loop condition for a prescribed time.
Interlocking: the interlocking in the electric control is mainly arranged for protecting the safe operation of the electric appliance, and the interlocking is mainly formed by mutually controlling two electric appliances.
Normally open contact: the coil is electrically connected with the normally open contact which is in an open state in a normal state.
Normally closed contact: the coil is electrically connected with the normally-open contact which is in a closed state in a normal state.
An intermediate relay: intermediate relays are commonly used to transmit signals and control multiple circuits simultaneously, and may also be used to directly control small capacity motors or other electrical actuators.
The following describes an interlocking device of a UPS inverter and an external maintenance bypass provided by the present utility model with reference to fig. 1 to 2.
Referring to fig. 1, the present utility model provides an interlock device of a UPS inverter and an external maintenance bypass, comprising: a first loop, a second loop and a third loop which are mutually connected in parallel are arranged between the UPS inverter and the external maintenance bypass;
the first loop includes: a first unit and a second unit connected in series, wherein the first unit comprises a normally closed contact 110 of the UPS inverter, and the second unit is a closing circuit 120 of the external maintenance bypass;
the second circuit includes: a third unit and a fourth unit in series, the third unit comprising an external service bypass normally open contact 130, the fourth unit comprising a UPS output normally open contact 140 and a control element 150 in series;
the third loop includes: the control element normally-closed contact 160 and the UPS inverter control board 170 connected in series;
the first loop is turned on or off, the external service bypass is turned on or cannot be started, the third loop is turned off or on, and the UPS inverter control board 170 cannot be started or operated normally, so as to achieve interlocking of the UPS inverter and the external service bypass.
When the external maintenance bypass normally open contact 130 and the UPS output normally open contact 140 are closed at the same time, the external maintenance bypass breaker closing coil 120 is powered to conduct the first loop, and the external maintenance bypass is connected to normally operate; the coil of the control element 150 is electrified to conduct the second loop, the normally closed contact 160 of the control element is electrified to be disconnected to disconnect the third loop, and the inverter control board 170 is disconnected from the circuit to be started;
when the external maintenance bypass normally open contact 130 or 110 is opened, the external maintenance bypass breaker closing coil 120 is de-energized to disconnect the first loop, and the external maintenance bypass cannot be started; the coil of the control element 150 is de-energized to open the second loop, the normally closed contact 160 of the control element is de-energized to close the third loop to conduct, and the inverter control board 170 is connected into the circuit to work normally.
The power of the inverter in the present embodiment may be set to 400VA, alternatively, the inverter may be set to different power according to different situations.
It should be noted that, in this embodiment, the control element is a relay or a programmable logic controller PLC.
In the interlocking device of the UPS inverter and the external maintenance bypass provided in this embodiment, by controlling the on or off states of the external maintenance bypass normally open contact 130, the UPS output normally open contact 140, and the UPS inverter normally closed contact 110, the first loop, the second loop, and the third loop are in the on or off states, so that the external maintenance bypass is in the working or stop state, and accordingly, the inverter control board is in the stop or working state. The utility model can realize the automatic interlocking of the UPS inverter and the external maintenance bypass, and prevent the risk caused by misoperation.
Referring to fig. 2, the utility model provides an interlocking device of UPS inverters and external maintenance bypasses, wherein the number of UPS inverters is a plurality;
the first unit comprises a plurality of normally-closed contacts 210 of UPS inverters which are sequentially connected in series, and each normally-closed contact 210 of the UPS inverter corresponds to one UPS inverter respectively;
the fourth unit includes a plurality of parallel subunits, each subunit includes a UPS output normally open contact 220 and a control element 230 connected in series, where each UPS output normally open contact corresponds to one UPS inverter.
The number of the third loops is multiple, and each third loop corresponds to one subunit; each third loop includes a set of control element normally-closed contacts 240 and a UPS inverter control board 250 connected in series, and the control element normally-closed contacts 240 of the set correspond to the control elements in the respective subunits, and the UPS inverter control board 250 of the set corresponds to the inverter corresponding to the respective subunits.
When the normally-closed contact 110 of the UPS inverter and the normally-closed contact 210 of the UPS inverter are closed, and the normally-open contact 130 of the external maintenance bypass and the normally-open contact 140 of the UPS output are closed at the same time, the closing circuit 120 of the external maintenance bypass is powered to conduct the first loop, and the external maintenance bypass is connected to normally operate; the coil of the control element 150 is electrified to conduct the second loop, the normally closed contact 160 of the control element is electrified to be disconnected to disconnect the third loop, and the inverter control board 170 is disconnected from the circuit and cannot be started;
when the normally-closed contact 110 of the UPS inverter or the normally-closed contact 210 of the UPS inverter or the normally-open contact 130 of the external maintenance bypass is opened, the switching-on coil 120 of the external maintenance bypass breaker is powered off to disconnect the first loop, and the external maintenance bypass cannot be started normally; the coil of the control element 150 is de-energized to open the second loop, the normally closed contact 160 of the control element is de-energized to close the third loop to conduct, and the inverter control board 170 is connected into the circuit to work normally.
In the implementation, the normally-closed contact 210 of the UPS inverter is connected with the normally-closed contact 110 of the UPS inverter in series, namely, the normally-closed contacts of all UPS static switches in a UPS parallel operation system are added to a closing control loop of a maintenance bypass circuit breaker, and when any UPS inverter is started, the first loop is opened, so that an external maintenance bypass cannot be closed, and the risk of parallel connection of a UPS power supply and a mains supply is effectively avoided.
In addition, because the normally-closed contact of the control element is arranged in the third loop, the inverter cannot be started when the UPS loop and the external maintenance bypass are in parallel operation, so that the risk of parallel connection of the commercial power and the UPS caused by manual misoperation is solved.
When the external maintenance bypass normally open contact 130 and the UPS output normally open contact 140 or the UPS output normally open contact 220 are closed, the first loop and the second loop are turned on, and the external maintenance bypass is turned on to work normally; the control element normally-closed contact 160 or the control element normally-closed contact 240 is electrically disconnected, the third loop or the fourth loop is disconnected, and the inverter control board 170 or the UPS inverter control board 250 is disconnected from the circuit and cannot be started;
when the normally-closed contact 110 of the UPS inverter or the normally-closed contact 210 of the UPS inverter or the normally-open contact 130 of the external maintenance bypass is opened, the switching-on coil 120 of the external maintenance bypass breaker is powered off to disconnect the first loop, and the external maintenance bypass cannot work normally; the coil of the control element 150 is de-energized to open the second loop, the normally closed contact 160 of the control element is de-energized to close the third loop to conduct, and the inverter control board 170 is connected into the circuit to work normally.
In this embodiment, when the external maintenance bypass normally open contact 130 and the UPS output normally open contact 140 are in a closed state at the same time, the control element 150 and the second control element 230 are powered on, and the normally closed contacts 240 of the first and second control elements in the third and fourth loops are disconnected, so that the UPS inverter cannot be turned on at this time, and thus the embodiment realizes the interlock protection based on the inverter and the external maintenance bypass.
Based on the above embodiment, the third loop further includes an inverter switch 180, and the inverter switch 180 is connected in series with the normally closed contact 160 of the control element and the UPS inverter control board 170.
In this embodiment, the inverter switch 180 and the inverter switch 260 may play a role of emergency braking, and when an emergency occurs, the inverter switch 180 and the inverter switch 260 may be turned off, so that the third loop and the fourth loop are cut off, and the inverter control board 170 and the UPS inverter are powered off and cannot work normally.
Based on the above embodiment, one ends of the first loop and the second loop are connected with any three-phase line of the external power supply device, and the other ends of the first loop and the second loop are connected with a ground line.
Optionally, the second unit includes: an external service bypass switch-on button 310 and the external service bypass breaker switch-on coil 320 in series.
Optionally, the normally-closed contact of the UPS inverter is a normally-closed contact of a static switch of the UPS inverter.
In this embodiment, the external maintenance bypass switch-on button 310 may play a role of emergency braking for the external maintenance bypass, and when an emergency occurs, the external maintenance bypass switch-on button 310 may be triggered, so as to cut off the first loop, so that the external maintenance bypass switch-on coil 320 is disconnected from the first loop and cannot work normally.
The apparatus embodiments described above are merely illustrative, wherein the elements illustrated as separate elements may or may not be physically separate, and the elements shown as elements may or may not be physical elements, may be located in one place, or may be distributed over a plurality of network elements. Some or all of the modules may be selected according to actual needs to achieve the purpose of the solution of this embodiment. Those of ordinary skill in the art will understand and implement the present utility model without undue burden.
Finally, it should be noted that: the above embodiments are only for illustrating the technical solution of the present utility model, and are not limiting; although the utility model has been described in detail with reference to the foregoing embodiments, it will be understood by those of ordinary skill in the art that: the technical scheme described in the foregoing embodiments can be modified or some technical features thereof can be replaced by equivalents; such modifications and substitutions do not depart from the spirit and scope of the technical solutions of the embodiments of the present utility model.
Claims (10)
1. An interlocking device of a UPS inverter and an external maintenance bypass is characterized in that a first loop, a second loop and a third loop which are mutually connected in parallel are arranged between the UPS inverter and the external maintenance bypass;
the first loop includes: the first unit comprises a normally-closed contact of the UPS inverter, and the second unit is a closing circuit of the external maintenance bypass;
the second circuit includes: a third unit and a fourth unit in series, the third unit comprising an external service bypass normally open contact, the fourth unit comprising a UPS output normally open contact and a control element in series;
the third loop includes: the control element normally-closed contact is connected in series with the UPS inverter control board;
the first loop is connected or disconnected, the external maintenance bypass is connected or cannot be started, the third loop is disconnected or connected, and the UPS inverter control board cannot be started or normally works so as to realize interlocking of the UPS inverter and the external maintenance bypass.
2. The UPS inverter and external service bypass interlock of claim 1, wherein the number of UPS inverters is a plurality;
the first unit comprises a plurality of normally-closed contacts of the UPS inverters which are sequentially connected in series, and each normally-closed contact of the UPS inverter corresponds to one UPS inverter respectively.
3. The UPS inverter and external service bypass interlock of claim 1, wherein the number of UPS inverters is a plurality;
the fourth unit comprises a plurality of subunits connected in parallel, each subunit comprises a serial UPS output normally open contact and each UPS output normally open contact corresponds to one UPS inverter respectively.
4. The apparatus of claim 3, wherein the UPS inverter and the external service bypass interlock are configured to,
the number of the third loops is multiple, and each third loop corresponds to one subunit; each third loop comprises a group of control element normally-closed contacts connected in series and a UPS inverter control board, wherein the group of control element normally-closed contacts correspond to the control elements in the corresponding subunits, and the group of UPS inverter control boards correspond to the inverters corresponding to the corresponding subunits.
5. The UPS inverter and external service bypass interlock apparatus of any one of claims 1 to 4 wherein the third loop further comprises an inverter switch, the inverter switch being in series with the normally closed contact of the control element, the inverter control board.
6. The UPS inverter and external service bypass interlocking device according to any one of claims 1 to 4, wherein one end of the first loop and the second loop is connected to any one of three phase lines of an external power supply apparatus, and the other end of the first loop and the second loop is connected to a ground line.
7. The UPS inverter and external service bypass interlock apparatus of any one of claims 1-4, wherein the second unit comprises: and the external maintenance bypass switch-on button is connected in series with the external maintenance bypass breaker switch-on coil.
8. The interlocking device of a UPS inverter and an external maintenance bypass according to any one of claims 1 to 4, wherein the UPS inverter normally-closed contact is a normally-closed contact of a static switch of the UPS inverter.
9. An interlocking device of a UPS inverter and an external service bypass according to any one of claims 1 to 4 wherein the control element is a relay.
10. The interlocking device of a UPS inverter and an external service bypass according to any one of claims 1 to 4, wherein the control element is a programmable logic controller PLC.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202320255282.4U CN219643651U (en) | 2023-02-13 | 2023-02-13 | Interlocking device for UPS inverter and external maintenance bypass |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202320255282.4U CN219643651U (en) | 2023-02-13 | 2023-02-13 | Interlocking device for UPS inverter and external maintenance bypass |
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| Publication Number | Publication Date |
|---|---|
| CN219643651U true CN219643651U (en) | 2023-09-05 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202320255282.4U Active CN219643651U (en) | 2023-02-13 | 2023-02-13 | Interlocking device for UPS inverter and external maintenance bypass |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN219643651U (en) |
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2023
- 2023-02-13 CN CN202320255282.4U patent/CN219643651U/en active Active
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