CN218102589U - External maintenance bypass device of UPS - Google Patents
External maintenance bypass device of UPS Download PDFInfo
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- CN218102589U CN218102589U CN202222407614.4U CN202222407614U CN218102589U CN 218102589 U CN218102589 U CN 218102589U CN 202222407614 U CN202222407614 U CN 202222407614U CN 218102589 U CN218102589 U CN 218102589U
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Abstract
The utility model relates to an external maintenance bypass device of UPS, the switch comprises first to eighth cables, a switch device and first to eighth connecting pieces; first cable and second cable warp the first alternating current output of first commercial power alternating current input end and UPS is connected to switching device the second alternating current output of third cable and fourth cable warp switching device connects second commercial power alternating current input end and UPS, fifth cable and sixth cable warp switching device connects the third alternating current output of third commercial power alternating current input end and UPS, seventh cable and eighth cable warp switching device connects the fourth alternating current output of fourth commercial power alternating current input end and UPS. The external maintenance bypass device of UPS can not only cut off the power supply of UPS in the maintenance process, thereby ensuring the safety of the working personnel, but also can continuously supply power for the load, thereby maintaining the normal work of the load.
Description
Technical Field
The utility model relates to an uninterrupted Power source (Uninterruptable Power Supply, UPS), more specifically say, relate to an external maintenance bypass device of UPS.
Background
In the present market, medium and low power UPSs (usually referred to as UPSs not exceeding 40 kVA) are designed, and the UPSs themselves usually do not have a built-in maintenance bypass function due to cost reasons and conventional practice. When the UPS is in use, under the condition that the commercial power is normal, a commercial power inversion power supply mode and a commercial power bypass power supply mode exist. In some cases, such as UPS inverter failure, UPS rectifier failure, short circuit of the back-end load, UPS overload timeout, UPS internal fan failure or high ambient temperature resulting in overtemperature timeout, UPS set to ECO (economy and efficiency mode of operation), the UPS will typically operate in a mains bypass supply mode when the inverter is shut down by human operation. Once the UPS works in the utility power bypass supply mode, the UPS needs to be repaired or replaced, and because the UPS with medium and small power generally does not have the internal repair bypass function, the load has to be powered off, so that the UPS can be repaired or replaced without electricity. The UPS with different models is maintained or replaced for different time periods from half an hour to hours, and the load is powered off for a long time.
SUMMERY OF THE UTILITY MODEL
The to-be-solved technical problem of the utility model lies in, when the UPS work is in commercial power bypass power supply mode to prior art, need the defect of outage load, thereby provide one kind and can cut off the power supply UPS in the maintenance process and guarantee staff's safety and can last to maintain the external maintenance bypass device of UPS that the load normally worked for the load power supply again.
The utility model provides a technical scheme that its technical problem adopted is: the UPS external maintenance bypass device comprises a first cable, a second cable, a third cable, a fourth cable, a fifth cable, a sixth cable, a seventh cable, an eighth cable, a switch device, a first connecting piece, a second connecting piece, a third connecting piece, a fourth connecting piece, a fifth connecting piece, a sixth connecting piece, a seventh connecting piece and an eighth connecting piece;
the first end of the first cable is connected with a first commercial power alternating-current input end through the first connecting piece, the second end of the first cable is connected with the first end of the switching device, the first end of the second cable is connected with a first alternating-current output end of the UPS through the second connecting piece, and the second end of the second cable is connected with the second end of the switching device; a first end of the third cable is connected with a second commercial power alternating-current input end through the third connecting piece, a second end of the third cable is connected with a third end of the switching device, a first end of the fourth cable is connected with a second alternating-current output end of the UPS through the fourth connecting piece, and a second end of the fourth cable is connected with a fourth end of the switching device; a first end of the fifth cable is connected with a third mains supply alternating current input end of the UPS through the fifth connecting piece, a second end of the fifth cable is connected with a fifth end of the switching device, a first end of the sixth cable is connected with a third alternating current output end of the UPS through the sixth connecting piece, and a second end of the sixth cable is connected with a sixth end of the switching device; the first end of the seventh cable is connected with a fourth commercial power alternating current input end of the UPS through the seventh connecting piece, the second end of the seventh cable is connected with a seventh end of the switching device, and the first end of the eighth cable is connected with a fourth alternating current output end of the UPS through the eighth connecting piece, and the second end of the eighth cable is connected with an eighth end of the switching device.
The external maintenance bypass device of UPS in, switching device includes first switch, second switch, third switch and fourth switch, the first end of first switch is connected the second end of first cable, second end are connected the second end of second cable, the first end of second switch is connected the second end of third cable, second end are connected the second end of fourth cable, the first end of third switch is connected the second end of fifth cable, second end are connected the second end of sixth cable, the first end of fourth switch is connected the second end of seventh cable, second end are connected the second end of eighth cable.
External maintenance bypass device of UPS in, switching device includes 4P's air switch or the air switch of 3P + 1P.
The external maintenance bypass device of UPS in the utility model, the connecting piece is including the current clamp or the plug of taking insulating cover.
The external maintenance bypass device of UPS in, further include ninth cable and ninth connecting piece, switching device includes the switch box, sets up 4P air switch and ground terminal in the switch box, 4P air switch includes first looks live wire switch, second looks live wire switch, third phase live wire switch and zero line switch, the first end of first looks live wire switch is connected the second end of first cable, second end connection the second end of second cable, the first end of second looks live wire switch is connected the second end, the second end connection of third cable the second end of fourth cable, the first end of third phase live wire switch is connected the second end, the second end connection of fifth cable the second end of sixth cable, the first end connection of zero line switch the second end, the second end connection of seventh cable the second end of eighth cable, the first end warp of ninth cable ground connection piece, second end connection ground terminal.
In the external maintenance bypass device of UPS, the connecting piece includes current clamp or plug with insulating cover.
In the external maintenance bypass device of UPS of the present invention, the switch box further comprises a current transformer, a voltage transformer and/or a phase sequence detection device;
the current transformer is respectively connected with the second cable, the fourth cable and the eighth cable to detect a current effective value; the voltage transformer is respectively connected with the first cable, the third cable and the seventh cable to detect a voltage effective value; the phase sequence detection device is respectively connected with the first cable, the third cable and the seventh cable to detect the phase sequence.
In the external maintenance bypass device of UPS, the switch box further includes a display, the display electricity is connected current transformer and/or voltage transformer is in order to show the electric current effective value and/or the voltage effective value, the display is installed the switch box outside.
The external maintenance bypass device of UPS in, the switch box further includes alarm device, alarm device communication connection phase sequence detection device is in order to report to the police based on phase sequence testing result.
The external maintenance bypass device of UPS, among it, alarm device includes bee calling organ and/or warning light.
Implement the utility model discloses an external maintenance bypass device of UPS, before maintenance or change UPS, be in under the state of commercial power bypass power supply with UPS, then couple together the commercial power of UPS front end and the load of rear end conveniently through the external maintenance bypass device of aforementioned UPS to can be to the UPS outage, maintain safely or change the operation, thereby last to maintain load normal work for the load power supply through the commercial power simultaneously. After the UPS is repaired or replaced, the UPS can be loaded uninterruptedly in a state of power supply of the UPS commercial power bypass, so that the UPS external maintenance bypass device is withdrawn, the safety of field maintenance personnel is guaranteed, and the continuous commercial power supply of the load in the whole maintenance process is guaranteed.
Drawings
The invention will be further explained with reference to the drawings and examples, wherein:
fig. 1 is a schematic structural diagram of a first preferred embodiment of an external UPS maintenance bypass apparatus according to the present invention;
fig. 2 is a schematic structural diagram of a second preferred embodiment of the UPS external maintenance bypass device of the present invention;
FIG. 3A illustrates a schematic diagram of a UPS employing mains bypass power supply;
fig. 3B is a schematic diagram illustrating that the UPS external maintenance bypass device and the UPS internal bypass supply power to the load together when the UPS external maintenance bypass device of the present invention is used;
fig. 3C illustrates a schematic diagram of a UPS external maintenance bypass device of the present invention used to power a load alone;
fig. 3D shows a UPS utility inversion power supply schematic;
fig. 4 is a schematic structural diagram of a third preferred embodiment of the UPS external maintenance bypass device of the present invention.
Detailed Description
In order to make the objects, technical solutions and advantages of the present invention more clearly understood, the present invention will be further described in detail with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are for purposes of illustration only and are not intended to limit the invention.
The utility model relates to an external maintenance bypass device of UPS, including first cable, second cable, third cable, fourth cable, fifth cable, sixth cable, seventh cable, eighth cable, switching device, first connecting piece, second connecting piece, third connecting piece, fourth connecting piece, fifth connecting piece, sixth connecting piece, seventh connecting piece and eighth connecting piece; the first end of the first cable is connected with a first commercial power alternating current input end through the first connecting piece, the second end of the first cable is connected with the first end of the switching device, the first end of the second cable is connected with a first alternating current output end of the UPS through the second connecting piece, and the second end of the second cable is connected with the second end of the switching device; a first end of the third cable is connected with a second commercial power alternating-current input end through the third connecting piece, a second end of the third cable is connected with a third end of the switching device, a first end of the fourth cable is connected with a second alternating-current output end of the UPS through the fourth connecting piece, and a second end of the fourth cable is connected with a fourth end of the switching device; a first end of the fifth cable is connected with a third commercial power alternating-current input end of the UPS through the fifth connecting piece, a second end of the fifth cable is connected with a fifth end of the switching device, a first end of the sixth cable is connected with a third alternating-current output end of the UPS through the sixth connecting piece, and a second end of the sixth cable is connected with a sixth end of the switching device; the first end of the seventh cable is connected with a fourth commercial power alternating current input end of the UPS through the seventh connecting piece, the second end of the seventh cable is connected with a seventh end of the switching device, and the first end of the eighth cable is connected with a fourth alternating current output end of the UPS through the eighth connecting piece, and the second end of the eighth cable is connected with an eighth end of the switching device. Implement the utility model discloses an external maintenance bypass device of UPS, before maintenance or change UPS, be in under the state of commercial power bypass power supply with UPS, then couple together the commercial power of UPS front end and the load of rear end conveniently through the external maintenance bypass device of aforementioned UPS to can be to the UPS outage, maintain safely or change the operation, thereby last to maintain load normal work for the load power supply through the commercial power simultaneously. After the UPS is repaired or replaced, the UPS can be loaded uninterruptedly in a state of power supply of the UPS commercial power bypass, so that the UPS external maintenance bypass device is withdrawn, the safety of field maintenance personnel is guaranteed, and the continuous commercial power supply of the load in the whole maintenance process is guaranteed.
Fig. 1 is a schematic structural diagram of a first preferred embodiment of the UPS external maintenance bypass device according to the present invention. As shown in fig. 1, the external maintenance bypass device for UPS of the present invention includes a cable 1, a cable 2, a cable 3, a cable 4, a cable 5, a cable 6, a cable 7, a cable 8, a switch device 100, a connecting member 11, a connecting member 21, a connecting member 31, a connecting member 41, a connecting member 51, a connecting member 61, a connecting member 71, and a connecting member 81. As shown in fig. 1, a first end of the cable 1 is connected to a first ac input end of a utility power through the connector 11, a second end of the cable is connected to a first end of the switching device 100, and a first end of the cable 2 is connected to a first ac output end of a UPS through the connector 21, and a second end of the cable is connected to a second end of the switching device 100; the first end of the cable 3 is connected to a second ac input end of the utility power supply through the connecting member 31, the second end is connected to the third end of the switching device 100, the first end of the cable 4 is connected to the second ac output end of the UPS through the connecting member 41, and the second end is connected to the fourth end of the switching device 100; the first end of the cable 5 is connected to a third ac input terminal of the UPS via the connector 51, the second end of the cable is connected to the fifth terminal of the switching device 100, the first end of the cable 6 is connected to a third ac output terminal of the UPS via the connector 61, and the second end of the cable is connected to the sixth terminal of the switching device 100; the first end of the cable 7 is connected to the fourth ac input terminal and the second terminal of the UPS via the connecting member 71, and the first end of the cable 8 is connected to the fourth ac output terminal and the second terminal of the UPS via the connecting member 81. The eighth terminal of the switching device 100 is connected to the second terminal of the UPS.
In a preferred embodiment of the present invention, the switch device 100 may include four switch devices, such as a first switch, a second switch, a third switch and a fourth switch, wherein the first end of the first switch is connected to the second end and the second end of the cable 1, the second end of the cable 2, the first end of the second switch is connected to the second end and the second end of the cable 3, the second end of the cable 4, the first end of the third switch is connected to the second end and the second end of the cable 5, the second end of the cable 6, and the first end of the fourth switch is connected to the second end and the second end of the cable 7, and the second end of the cable 8.
In a preferred embodiment of the present invention, the switching device 100 may include a 4P air switch or a 3p +1p air switch. The 4P air switch or the air switch of 3P +1P comprises a first-phase live wire switch, a second-phase live wire switch, a third-phase live wire switch and a zero line switch, wherein a first end of the first-phase live wire switch is connected with a second end of the cable 1, a second end of the cable 2 is connected with a second end of the cable 2, a first end of the second-phase live wire switch is connected with a second end of the cable 3, a second end of the cable 4 is connected with a second end of the third-phase live wire switch, a second end of the third-phase live wire switch is connected with a second end of the cable 5, a second end of the third-phase live wire switch is connected with a second end of the cable 6, and a first end of the zero line switch is connected with a second end of the cable 7, and a second end of the zero line switch is connected with a second end of the cable 8.
In a preferred embodiment of the invention, the connecting element comprises a current clamp with an insulating sleeve. In a preferred embodiment of the invention, the connector comprises a plug.
Implement the utility model discloses an external maintenance bypass device of UPS, before maintenance or change UPS, be in under the state of commercial power bypass power supply with UPS, then couple together the commercial power of UPS front end and the load of rear end conveniently through the external maintenance bypass device of aforementioned UPS to can be to the UPS outage, maintain safely or change the operation, thereby last to maintain load normal work for the load power supply through the commercial power simultaneously. After the UPS is repaired or replaced, the UPS can be loaded uninterruptedly in a state of power supply of the UPS commercial power bypass, so that the UPS external maintenance bypass device is withdrawn, the safety of field maintenance personnel is guaranteed, and the continuous commercial power supply of the load in the whole maintenance process is guaranteed.
Fig. 2 is a schematic structural diagram of a second preferred embodiment of the UPS external maintenance bypass device of the present invention. As shown in fig. 2, the utility model discloses an external maintenance bypass device of UPS, including cable 1, cable 2, cable 3, cable 4, cable 5, cable 6, cable 7, cable 8, cable 9, switching device 100, connecting piece 11, connecting piece 21, connecting piece 31, connecting piece 41, connecting piece 51, connecting piece 61, connecting piece 71, connecting piece 81 and connecting piece 91.
In the present preferred embodiment, the switching device 100 includes a switch box 110, a 4P air switch Q provided in the switch box 110, a ground terminal GND, a current transformer 120, a voltage transformer 130, a display 140, a phase sequence detection apparatus 150, and an alarm apparatus 160. As shown in fig. 2, the 4P air switch Q includes a first phase live wire switch, a second phase live wire switch, a third phase live wire switch and a zero line switch, a first end of the first phase live wire switch is connected to a second end and a second end of the cable 1, a first end of the second phase live wire switch is connected to a second end and a second end of the cable 3, the second end of the cable 4 is connected to a first end of the third phase live wire switch, the second end and the second end of the cable 5 are connected to a second end of the cable 6, a first end of the zero line switch is connected to a second end and a second end of the cable 7, the second end of the cable 8 is connected to a second end of the zero line switch, and a first end of the cable 9 is grounded through the connecting piece 9 and the second end is connected to the ground terminal GND.
In the preferred embodiment of the present invention, the length of the cable 1, the cable 2, the cable 3, the cable 4, the cable 5, the cable 6, the cable 7, the cable 8, and the cable 9 is preferably greater than or equal to 5m. The connecting members 11, 21, 31, 41, 51, 61, 71, 81 and 91 are preferably current clamps (withstand voltage class ≥ 1 kV) with insulating sheaths and having a certain current carrying capacity. In the preferred embodiment, cables 1 and 2 are respectively connected to the a-phase mains ac input and the a-phase ac output of the UPS, cables 3 and 4 are respectively connected to the B-phase mains ac input and the B-phase ac output of the UPS, cables 5 and 6 are respectively connected to the C-phase mains ac input and the C-phase ac output of the UPS, cables 7 and 8 are respectively connected to the neutral line mains ac input N and the neutral line output N of the UPS, and cable 9 is connected to the ground protection PE line.
Because a medium-power or low-power UPS generally has two designs of single-phase output and three-phase output, in order to be compatible with the UPS of the two designs, a three-phase configuration is adopted, in the preferred embodiment, a 4P air switch Q is selected, and certainly, an air switch 3p +1p can also be selected, and the three-phase UPS are respectively connected to an a/B/C three-phase live line and a zero line N of three-phase input mains supply. The corresponding cables 1-9 are also configured by adopting a three-phase five-wire system, namely an A/B/C three-phase live wire, a zero wire N and a grounding protection PE wire.
The utility model discloses an in the preferred embodiment, can choose for use the air switch of different capacity and the cable of different line footpaths according to the UPS power of adaptation to make the external maintenance bypass device of UPS of different capacity. Taking a 40kVA UPS as an example, the maximum output and bypass single-phase current are calculated, and the calculation results are shown in table 1 below:
| UPS rated power | Voltage class | Calculating output/bypass current |
| 40kVA | 220V | 60.6A |
(calculation method: 40kVA X1000/3/220V = 60.6A)
TABLE 1
According to the above calculation results, the wire diameter, air switch capacity and current clamp current carrying capacity of the selected cable are as follows:
TABLE 2
In the preferred embodiment of the present invention, the air switch Q is fixed in the switch box 110, and the distance between the connection terminal and the metal conductive object such as the switch box 110 satisfies the safety requirements. The current transformer 120 is connected to the cables 2, 4 and 8, respectively, to detect effective current values, such as a/B/C three-phase and N-line effective current values. The voltage transformer 130 is connected to the cables 1, 3 and 7, respectively, to detect a voltage effective value, for example, a three-phase voltage effective value. The phase sequence detection device 150 is respectively connected with the cable 1, the cable 3 and the cable 7 to detect the phase sequence of three-phase power, so as to prevent short circuit caused by wrong connection. The display 140 electrically connects the current transformer 120, the voltage transformer 130 and the phase sequence detecting device 150 to display the current effective value, the voltage effective value and the phase sequence. The display 140 may be mounted on the outside of the switch cabinet 110. By arranging the current transformer 120, the voltage transformer 130 and the display 140 to display current and voltage data, the load condition can be confirmed in time, which can lead to the prolonged maintenance time. The air switch Q is arranged in the switch box 110, so that the terminal of the air switch Q can be prevented from being exposed, and the operation safety and the personal safety can be guaranteed. The provision of the ground terminal GND in the switch box 110 further protects the safety of the operator and the equipment. In the preferred embodiment, the alarm device 160 is communicatively connected to the phase sequence detection device 150 to alarm based on the phase sequence detection result. The alarm device 160 may include, for example, a buzzer and/or a warning lamp disposed outside the switch box 110, and may give an audible and visual warning if the phase sequence is reversed.
Of course, in a further preferred embodiment of the present invention, for some low power UPSs, the power distribution may not be suitable for using current clamps, and IEC standard plugs or other standard plugs may be used instead of current clamps as the case may be, but are suitable for low power UPSs because the current carried by the plugs is small, typically not more than 16A.
Fig. 3A shows a schematic diagram of a UPS powered by a mains bypass. Fig. 3B shows a schematic diagram of the external maintenance bypass device of UPS and the internal bypass of UPS supplying power to the load together when the external maintenance bypass device of UPS is adopted. Fig. 3C shows a schematic diagram of an external UPS maintenance bypass device according to the present invention for supplying power to a load alone. Fig. 3D shows a UPS mains inversion power supply schematic. The operation and principle of the UPS external maintenance bypass device of the present invention will be described below with reference to fig. 3A-3D.
As shown in fig. 3A, when the UPS operates in the utility power bypass supply mode due to an internal fault, the electricity supplied to the load is actually the utility power that is not purified by the UPS, but only the bypass SCR or the contactor, the relay, and other devices pass through the UPS, and the operation principle diagram is as follows, and the dotted line represents the power supply path. At this time, the UPS and the other branch of the same commercial power can be connected in parallel, and the external maintenance bypass device of the UPS of the utility model just utilizes the principle.
Firstly, an air switch Q of the UPS external maintenance bypass device is disconnected, and the cable 1, the cable 3, the cable 5, the cable 7 and the cable 9 are reliably connected with a three-phase live wire, namely an A-phase live wire, a B-phase live wire, a C-phase live wire and a zero wire, namely an N-wire and a PE-wire, of the mains supply alternating current input through the connecting piece 11, the connecting piece 31, the connecting piece 51, the connecting piece 71 and the connecting piece 91. Meanwhile, the cables 2, 4, 6 and 8 are reliably connected with the phase A, the phase B, the phase C and the phase N of the load power supply (namely the UPS alternating current output end) through the connecting piece 21, the connecting piece 41, the connecting piece 61 and the connecting piece 81, the specific corresponding relation is as shown in the following table 3, and the voltage displayed by the device is confirmed to be consistent with the actual measurement without phase sequence reverse alarm.
Then, the idle switch Q of the external maintenance bypass device of the UPS is closed, as shown in fig. 3B, and the external maintenance bypass device of the UPS and the internal bypass of the UPS supply power to the load together. Because the impedance of the external maintenance bypass device of the UPS is smaller than that of the internal bypass of the UPS, most of the load current is borne by the external maintenance bypass device of the UPS at this time, it is confirmed that the current displayed by the external maintenance bypass device of the UPS is consistent with the measured current, the power supply schematic is shown in fig. 3B, and the dotted line represents the power supply path. Inside the external maintenance bypass device of the UPS, current flows from cable 1 through the dry switch Q to cable 2, from cable 3 through the dry switch Q to cable 4, from cable 5 through the dry switch Q to cable 6, and from cable 7 through the dry switch Q to cable 8.
At this time, the front stage input idle switch, the rear stage output idle switch and the battery idle switch of the UPS can be disconnected, the UPS is completely powered down, and the UPS is maintained or replaced after the internal discharge of the UPS is completed. At this time, the UPS external maintenance bypass device alone supplies power to the load, as shown in fig. 3C, and the dashed line indicates the power supply path. Similarly, within the external maintenance bypass device of the UPS, current flows from cable 1 through the dry switch Q to cable 2, from cable 3 through the dry switch Q to cable 4, from cable 5 through the dry switch Q to cable 6, and from cable 7 through the dry switch Q to cable 8.
After the maintenance or replacement of the UPS is completed, the UPS is turned on according to the normal procedure by closing the previous-stage mains supply input switch, and the UPS is in the output power supply state of the mains supply bypass, and then the UPS battery switch and the UPS subsequent-stage output switch are turned on, at this time, as shown in fig. 3B, the external maintenance bypass device of the UPS and the internal bypass of the UPS supply power to the load together.
The air switch Q of the UPS external maintenance bypass device is turned off, the connection member 11, the connection member 21, the connection member 31, the connection member 41, the connection member 51, the connection member 61, the connection member 71, and the connection member 81 are removed, at this time, the internal bypass of the UPS independently supplies power to the load, and the power supply schematic diagram is as shown in fig. 3A.
And finally, manually operating and starting the inverter of the UPS to recover the normal commercial power inversion power supply mode of the UPS system, wherein the power supply schematic diagram is shown as the following figure 3D, and the dotted line represents a power supply path. Hereto, utilize the utility model discloses an external maintenance bypass device of UPS has accomplished the maintenance or the change of whole UPS system, the uninterrupted power supply of in-process load.
Implement the utility model discloses an external maintenance bypass device of UPS, before maintenance or change UPS, be in under the state of commercial power bypass power supply with UPS, then couple together the commercial power of UPS front end and the load of rear end conveniently through the external maintenance bypass device of aforementioned UPS to can keep in repair or change the operation safely to the UPS outage, thereby continuously maintain load normal work for the load power supply through the commercial power simultaneously. After the UPS is repaired or replaced, the UPS can be loaded continuously under the condition of power supply of the UPS commercial power bypass, so that the UPS external maintenance bypass device is withdrawn, the safety of field maintenance personnel is ensured, and the continuous commercial power supply of the load in the whole maintenance process is ensured. Further, the utility model discloses an external maintenance bypass device of UPS possesses phase sequence and detects and the acousto-optic function of reporting an emergency and asking for help or increased vigilance, prevents the short-circuit accident that the phase sequence leads to instead and takes place. Furthermore the utility model discloses an external maintenance bypass device of UPS for portable design, needn't install on distribution system forever, but quick assembly disassembly, but repetitious utilization.
Fig. 4 is a schematic structural diagram of a third preferred embodiment of the UPS external maintenance bypass device of the present invention. In the simplified embodiment shown in fig. 4, the utility model discloses an external maintenance bypass device of UPS, including cable 1, cable 2, cable 3, cable 4, cable 5, cable 6, cable 7, cable 8, 4P air switch Q, connecting piece 11, connecting piece 21, connecting piece 31, connecting piece 41, connecting piece 51, connecting piece 61, connecting piece 71 and connecting piece 81. As shown in fig. 4, the first ends of the cables 1 and 2 are connected to the a-phase mains ac input and the a-phase ac output of the UPS via connecting pieces 11 and 21, respectively, the first ends of the cables 3 and 4 are connected to the B-phase mains ac input and the B-phase ac output of the UPS via connecting pieces 31 and 41, respectively, the first ends of the cables 5 and 6 are connected to the C-phase mains ac input and the C-phase ac output of the UPS via connecting pieces 51 and 61, respectively, and the first ends of the cables 7 and 8 are connected to the neutral mains ac input N and the neutral output N of the UPS via connecting pieces 71 and 81, respectively. The 4P air switch includes first looks live wire switch, second looks live wire switch, third looks live wire switch and zero line switch, the first end of first looks live wire switch is connected the second end of cable 1, second end are connected the second end of cable 2, the first end of second looks live wire switch is connected the second end of cable 3, second end are connected the second end of cable 4, the first end of third looks live wire switch is connected the second end of cable 5, second end are connected the second end of cable 6, the first end of zero line switch is connected the second end of cable 7, second end are connected the second end of cable 8.
In the preferred embodiment of the present invention, the length of the cable 1, cable 2, cable 3, cable 4, cable 5, cable 6, cable 7, cable 8 is preferably greater than or equal to 5m. The connecting members 11, 21, 31, 41, 51, 61, 71, 81 and 91 are preferably current clamps (withstand voltage class ≥ 1 kV) with insulating sheaths and having a certain current carrying capacity. Of course, in a further preferred embodiment of the present invention, for some low power UPSs, the power distribution may not be suitable for using current clamps, and the IEC standard plug or other standard plug may be used instead of the current clamps according to actual conditions, but since the current carried by the plug is small, generally not exceeding 16A, the plug is suitable for low power UPSs.
Of course, in a further preferred embodiment of the present invention, the air switch Q may be disposed in a switch box, and any one or more of the ground terminal GND, the current transformer 120, the voltage transformer 130, the display 140, the phase sequence detection device 150 and the alarm device 160 may be disposed in the switch box, and the specific configuration manner thereof may refer to the embodiment shown in fig. 2, and will not be described in detail herein.
Implement the utility model discloses an external maintenance bypass device of UPS, before maintenance or change UPS, be in under the state of commercial power bypass power supply with UPS, then couple together the commercial power of UPS front end and the load of rear end conveniently through the external maintenance bypass device of aforementioned UPS to can keep in repair or change the operation safely to the UPS outage, thereby continuously maintain load normal work for the load power supply through the commercial power simultaneously. After the UPS is repaired or replaced, the UPS can be loaded continuously under the condition of power supply of the UPS commercial power bypass, so that the UPS external maintenance bypass device is withdrawn, the safety of field maintenance personnel is ensured, and the continuous commercial power supply of the load in the whole maintenance process is ensured.
While the invention has been described with reference to specific embodiments, it will be understood by those skilled in the art that various changes may be made and equivalents may be substituted without departing from the scope of the invention. In addition, many modifications may be made to adapt a particular situation or material to the teachings of the invention without departing from its scope. Therefore, it is intended that the invention not be limited to the particular embodiment disclosed, but that the invention will include all embodiments falling within the scope of the appended claims.
The above description is only exemplary of the present invention and should not be taken as limiting the scope of the present invention, as any modifications, equivalents, improvements and the like made within the spirit and principles of the present invention are intended to be included within the scope of the present invention.
Claims (10)
1. The external maintenance bypass device for the UPS is characterized by comprising a first cable, a second cable, a third cable, a fourth cable, a fifth cable, a sixth cable, a seventh cable, an eighth cable, a switch device, a first connecting piece, a second connecting piece, a third connecting piece, a fourth connecting piece, a fifth connecting piece, a sixth connecting piece, a seventh connecting piece and an eighth connecting piece;
the first end of the first cable is connected with a first commercial power alternating current input end through the first connecting piece, the second end of the first cable is connected with the first end of the switching device, the first end of the second cable is connected with a first alternating current output end of the UPS through the second connecting piece, and the second end of the second cable is connected with the second end of the switching device; a first end of the third cable is connected with a second commercial power alternating-current input end through the third connecting piece, a second end of the third cable is connected with a third end of the switching device, a first end of the fourth cable is connected with a second alternating-current output end of the UPS through the fourth connecting piece, and a second end of the fourth cable is connected with a fourth end of the switching device; a first end of the fifth cable is connected with a third mains supply alternating current input end of the UPS through the fifth connecting piece, a second end of the fifth cable is connected with a fifth end of the switching device, a first end of the sixth cable is connected with a third alternating current output end of the UPS through the sixth connecting piece, and a second end of the sixth cable is connected with a sixth end of the switching device; the first end of the seventh cable is connected to the fourth commercial power alternating current input end and the second end of the UPS through the seventh connecting piece, the seventh end of the switching device is connected to the first end of the eighth cable, and the fourth alternating current output end and the second end of the UPS are connected to the eighth end of the switching device through the eighth connecting piece.
2. The UPS external service bypass apparatus according to claim 1, wherein the switch device comprises a first switch, a second switch, a third switch, and a fourth switch, wherein a first end of the first switch is connected to the second end of the first cable and a second end of the first switch is connected to the second end of the second cable, a first end of the second switch is connected to the second end of the third cable and a second end of the second switch is connected to the second end of the fourth cable, a first end of the third switch is connected to the second end of the fifth cable and a second end of the third switch is connected to the second end of the sixth cable, and a first end of the fourth switch is connected to the second end of the seventh cable and a second end of the eighth cable.
3. The UPS external service bypass device according to claim 2, wherein the switching device comprises a 4P air switch or a 3p +1p air switch.
4. The UPS external service bypass device according to any of claims 1-3, wherein the connector comprises a current clamp or plug with an insulating sleeve.
5. The UPS external maintenance bypass device according to claim 1, further comprising a ninth cable and a ninth connection member, wherein the switching device comprises a switch box, a 4P air switch and an earth terminal disposed in the switch box, the 4P air switch comprises a first phase live wire switch, a second phase live wire switch, a third phase live wire switch and a neutral wire switch, a first end of the first phase live wire switch is connected to a second end of the first cable, a second end of the first cable is connected to a second end of the second cable, a first end of the second phase live wire switch is connected to a second end of the third cable, a second end of the second cable is connected to a second end of the fourth cable, a first end of the third phase live wire switch is connected to a second end of the fifth cable, a second end of the sixth cable is connected to a second end of the sixth cable, a first end of the neutral wire switch is connected to a second end of the seventh cable, a second end of the eighth cable is connected to the earth terminal through the ninth earth connection member and the second end of the ninth cable.
6. The UPS external service bypass device according to claim 5, wherein the connector comprises a current clamp or plug with an insulating sleeve.
7. The UPS external service bypass device according to claim 5 or 6, wherein the switch box further comprises a current transformer, a voltage transformer and/or a phase sequence detection device;
the current transformer is respectively connected with the second cable, the fourth cable and the eighth cable to detect a current effective value; the voltage transformer is respectively connected with the first cable, the third cable and the seventh cable to detect a voltage effective value; the phase sequence detection device is respectively connected with the first cable, the third cable and the seventh cable to detect the phase sequence.
8. The UPS external service bypass device according to claim 7, wherein the switch box further comprises a display electrically connected to the current transformer and/or the voltage transformer for displaying the current effective value and/or the voltage effective value, the display being mounted outside the switch box.
9. The UPS external service bypass device according to claim 7, wherein the switch box further comprises an alarm device communicatively coupled to the phase sequence detection device to alarm based on the phase sequence detection result.
10. The UPS external service bypass device according to claim 9, wherein the alarm device comprises a buzzer and/or a warning light.
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| CN202222407614.4U CN218102589U (en) | 2022-09-09 | 2022-09-09 | External maintenance bypass device of UPS |
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| CN202222407614.4U CN218102589U (en) | 2022-09-09 | 2022-09-09 | External maintenance bypass device of UPS |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN118646141A (en) * | 2024-08-14 | 2024-09-13 | 厦门朗臣电子科技有限公司 | Inversion bypass switching system of UPS (uninterrupted Power supply) |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN118646141A (en) * | 2024-08-14 | 2024-09-13 | 厦门朗臣电子科技有限公司 | Inversion bypass switching system of UPS (uninterrupted Power supply) |
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