Isolation adjustable AC / DC power box

Abstract

An isolation adjustable AC / DC power box is provided with an isolation transformer, a self-coupling voltage regulator, a first adjustable DC power supply device, a second adjustable DC power supply device, a voltmeter head and a miniature circuit breaker, and the isolation transformer, the first adjustable DC power supply device and the second adjustable DC power supply device are all connected with an AC power supply. The output side of the isolation transformer is further connected with the input side of the self-coupling voltage regulator, and the voltmeter head is connected with the output side of the isolation transformer, the output side of the first adjustable direct-current power supply device, the output side of the second adjustable direct-current power supply device and the output side of the self-coupling voltage regulator. The isolation adjustable AC / DC power supply box can simultaneously realize AC or DC power supply output, has the advantages of adjustable voltage and high precision, and also has an electrical isolation function.

Description

Technical Field

[0001] The utility model relates to the technical field of inspection of relay protection devices, measurement and control devices and monitoring devices, and particularly relates to an isolated adjustable AC / DC power supply box. Background Art

[0002] At present, the power supply box is often a simple AC power supply or DC power supply, such as Chinese Patent Publication Nos. CN118412752A, CN218448950U, etc. When the output upper limit of this kind of power supply box is greater than 200V, the lower limit is mostly 20V, and it is difficult to meet 0V to 300V, and the accuracy is mostly 1% or lower. Moreover, when the output is an AC source, effective isolation is mostly not carried out, resulting in an electrical connection between the output side and the mains input side. Usually, only a miniature circuit breaker is installed on the input side, and there is no miniature circuit breaker on the output side. The output form is a terminal or a binding post.

[0003] The disadvantages of the above-mentioned prior art are as follows: 1. Functional singularity. The traditional power supply box usually only provides a simple AC or DC power supply output, and cannot meet the requirements of different voltage ranges of AC and DC at the same time, which limits its application in diverse test environments. 2. Limited voltage adjustment range. When the power supply output upper limit exceeds 200V, its lower limit voltage mostly starts from 20V, and continuous adjustment starting from 0V cannot be achieved, which limits the support for test equipment in the low voltage section and is not suitable for occasions where the voltage needs to be adjusted starting from zero. 3. Insufficient accuracy. The voltage adjustment accuracy of the traditional power supply box is mostly 1% or lower, which will affect the accuracy of test results for relay protection devices, measurement and control devices and monitoring devices that require high-precision testing. 4. Electrical isolation problem. When providing an AC power supply output, many power supply boxes do not take effective isolation measures, resulting in an electrical connection between the output side and the mains input side, increasing the safety hazard during the test process, and may introduce electrical interference, affecting the reliability of test results. 5. Insufficient safety design. Usually, only a miniature circuit breaker is set on the input side, and there is no independent miniature circuit breaker on the output side, which is difficult to quickly cut off the output in an emergency, reducing the operation safety and convenience.

[0004] Therefore, in view of the deficiencies of the prior art, it is very necessary to provide an isolated adjustable AC / DC power supply box to solve the deficiencies of the prior art. Summary of the Utility Model

[0005] The purpose of the utility model is to provide an isolated adjustable AC / DC power supply box to avoid the deficiencies of the prior art. The isolated adjustable AC / DC power supply box can simultaneously realize AC or DC power supply output, and also has the advantages of adjustable voltage, high precision, and electrical isolation function.

[0006] The above object of the utility model is achieved by the following technical measures:

[0007] Provided is an isolated adjustable AC-DC power supply box, which is provided with an isolation transformer, an autotransformer regulator, a first adjustable DC power supply device, a second adjustable DC power supply device, a voltmeter head and a miniature circuit breaker. The isolation transformer, the first adjustable DC power supply device and the second adjustable DC power supply device are all connected to an AC power supply. The output side of the isolation transformer is also connected to the input side of the autotransformer regulator. The voltmeter head is respectively connected to the output side of the isolation transformer, the output side of the first adjustable DC power supply device, the output side of the second adjustable DC power supply device and the output side of the autotransformer regulator. The miniature circuit breakers are respectively arranged on the input side of the isolation transformer, the output side of the isolation transformer, the input side of the first adjustable DC power supply device, the output side of the first adjustable DC power supply device, the input side of the second adjustable DC power supply device and the output side of the second adjustable DC power supply device.

[0008] Preferably, there are 6 miniature circuit breakers, which are respectively defined as a first input AC miniature circuit breaker, a second input AC miniature circuit breaker, a third input AC miniature circuit breaker, an output AC miniature circuit breaker, a first output DC miniature circuit breaker and a second output DC miniature circuit breaker. The first input AC miniature circuit breaker is arranged between the AC power supply and the input side of the isolation transformer. The second input AC miniature circuit breaker is arranged between the AC power supply and the input side of the first adjustable DC power supply device. The third input AC miniature circuit breaker is arranged between the AC power supply and the input side of the second adjustable DC power supply device. The first output DC miniature circuit breaker is arranged on the output side of the first adjustable DC power supply device. The second output DC miniature circuit breaker is arranged on the output side of the second adjustable DC power supply device. The input side of the output AC miniature circuit breaker is connected to the output side of the isolation transformer, and the output side of the output AC miniature circuit breaker is also connected to the input side of the autotransformer regulator.

[0009] Preferably, the voltmeter head is provided with a first voltmeter head, a second voltmeter head, a third voltmeter head and a fourth voltmeter head. The first voltmeter head is arranged between the output side of the isolation transformer and the input side of the output AC miniature circuit breaker. The second voltmeter head is arranged on the output side of the autotransformer regulator. The third voltmeter head is arranged between the output side of the first adjustable DC power supply device and the first output DC miniature circuit breaker. The fourth voltmeter head is arranged between the output side of the second adjustable DC power supply device and the second output DC miniature circuit breaker.

[0010] The isolated adjustable AC-DC power supply box of the present utility model is further provided with interfaces, which are respectively arranged on the output side of the isolation transformer, the output side of the autotransformer regulator, the output side of the first adjustable DC power supply device, the input side of the first adjustable DC power supply device and the output side of the second adjustable DC power supply device.

[0011] Preferably, the above interface is provided with a first output interface, a second output interface, a third output interface, a fourth output interface, a fifth output interface, a sixth output interface and an input interface. The first output interface and the second output interface are connected in parallel to the output side of the output AC miniature circuit breaker. The third output interface and the fourth output interface are arranged in parallel on the output side of the autotransformer. The fifth output interface is connected to the output side of the first output DC miniature circuit breaker. The sixth output interface is connected to the output side of the second output DC miniature circuit breaker. The input interface is arranged between the second input AC miniature circuit breaker and the input side of the first adjustable DC power supply device.

[0012] Preferably, the above first output interface, the fourth output interface, the fifth output interface and the sixth output interface are all banana interfaces.

[0013] Preferably, the above second output interface, the third output interface and the input interface are all three-hole sockets.

[0014] Preferably, the output power of the above first adjustable DC power supply device is 2000W, and the output voltage adjustment range is 10V to 300V.

[0015] Preferably, the output power of the above second adjustable DC power supply device is 500W, and the output voltage adjustment range is 0V to 48V.

[0016] Preferably, the above isolation transformer is a single-phase isolation transformer, and the input voltage of the isolation transformer is 220V, the output voltage is 220V, and the voltage accuracy is ±1%.

[0017] Preferably, the above autotransformer is a single-phase voltage regulator, and the capacity of the autotransformer is 500VA, the input voltage is 220V, and the output voltage is 0V to 300V.

[0018] All the above miniature circuit breakers are 2-pole miniature circuit breakers.

[0019] Preferably, the rated currents of the above first input AC miniature circuit breaker, the second input AC miniature circuit breaker, the third input AC miniature circuit breaker and the output AC miniature circuit breaker are 10A.

[0020] Preferably, the rated currents of the above first output DC miniature circuit breaker and the second output DC miniature circuit breaker are 6A or 10A.

[0021] An isolation adjustable AC / DC power supply box of the present utility model is provided with an isolation transformer, an autotransformer voltage regulator, a first adjustable DC power supply device, a second adjustable DC power supply device, a voltmeter head and a miniature circuit breaker. The isolation transformer, the first adjustable DC power supply device and the second adjustable DC power supply device are all connected to an AC power supply. The output side of the isolation transformer is also connected to the input side of the autotransformer voltage regulator. The voltmeter head is respectively connected to the output side of the isolation transformer, the output side of the first adjustable DC power supply device, the output side of the second adjustable DC power supply device and the output side of the autotransformer voltage regulator. The miniature circuit breakers are respectively arranged on the input side of the isolation transformer, the output side of the isolation transformer, the input side of the first adjustable DC power supply device, the output side of the first adjustable DC power supply device, the input side of the second adjustable DC power supply device and the output side of the second adjustable DC power supply device. Compared with the prior art, the isolation adjustable AC / DC power supply box of the present utility model has the following beneficial effects: 1. Multi-functional integration: It is a power supply box that can provide both AC and DC power outputs, and both have a wide voltage adjustment range, which can meet diverse test requirements, especially in environments where it is necessary to test AC and DC equipment simultaneously or perform precise tests within a wide voltage range. 2. High-precision voltage adjustment: The adjustment accuracy of its power output reaches 0.5 level, ensuring accurate power supply for high-precision test equipment such as relay protection devices, measurement and control devices and monitoring devices, thereby improving the credibility and repeatability of test results. 3. Enhanced electrical isolation and safety: It can effectively implement electrical isolation, ensuring complete isolation between the output side and the mains input side, reducing electrical interference, enhancing the safety of the test environment, and avoiding the influence of the external electrical environment on test results. 4. Perfect safety control mechanism: The isolation adjustable AC / DC power supply box is equipped with miniature circuit breakers at the input and output ends of each power supply circuit, and an independent miniature circuit breaker is provided on the output side, so as to quickly cut off the power supply in case of emergency, enhancing the safety guarantee of operators and the flexibility of equipment use. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] The present utility model is further described with reference to the accompanying drawings, but the content in the drawings does not constitute any limitation to the present utility model.

[0023] Figure 1 It is a schematic structural diagram of the environmental chamber in Embodiment 1.

[0024] In Figure 1 it includes:

[0025] Isolation transformer 10, autotransformer voltage regulator 20, first adjustable DC power supply device 30, second adjustable DC power supply device 40,

[0026] First voltmeter head 51, second voltmeter head 52, third voltmeter head 53, fourth voltmeter head 54,

[0027] The first input AC miniature circuit breaker 61, the second input AC miniature circuit breaker 62, the third input AC miniature circuit breaker 63, the output AC miniature circuit breaker 64, the first output DC miniature circuit breaker 65, the second output DC miniature circuit breaker 66,

[0028] The first output interface 71, the second output interface 72, the third output interface 73, the fourth output interface 74, the fifth output interface 75, the sixth output interface 76, the input interface 77. Specific embodiments

[0029] The technical solution of the present utility model will be further described in conjunction with the following embodiments.

[0030] Embodiment 1

[0031] An isolated adjustable AC-DC power supply box, as Figure 1 shown, is provided with an isolation transformer 10, an autotransformer 20, a first adjustable DC power supply device 30, a second adjustable DC power supply device 40, a voltmeter head, miniature circuit breakers and interfaces. The isolation transformer 10, the first adjustable DC power supply device 30 and the second adjustable DC power supply device 40 are all connected to the AC power supply. The output side of the isolation transformer 10 is also connected to the input side of the autotransformer 20. The voltmeter head is respectively connected to the output side of the isolation transformer 10, the output side of the first adjustable DC power supply device 30, the output side of the second adjustable DC power supply device 40 and the output side of the autotransformer 20. The voltmeter head is also connected to the isolation transformer 10. The miniature circuit breakers are respectively arranged on the input side of the isolation transformer 10, the output side of the isolation transformer 10, the input side of the first adjustable DC power supply device 30, the output side of the first adjustable DC power supply device 30, the input side of the second adjustable DC power supply device 40 and the output side of the second adjustable DC power supply device 40. The interfaces are respectively arranged on the output side of the isolation transformer 10, the output side of the autotransformer 20, the output side of the first adjustable DC power supply device 30, the input side of the first adjustable DC power supply device 30 and the output side of the second adjustable DC power supply device 40.

[0032] The output power of the first adjustable DC power supply device 30 is 2000W, and the output voltage adjustment range is 10V to 300V; the output power of the second adjustable DC power supply device 40 is 500W, and the output voltage adjustment range is 0V to 48V. The isolation transformer 10 is a single-phase isolation transformer 10, and the input voltage of the isolation transformer 10 is 220V, the output voltage is 220V, and the voltage accuracy is ±1%. The autotransformer 20 is a single-phase voltage regulator, and the capacity of the autotransformer 20 is 500VA, the input voltage is 220V, and the output voltage is 0V to 300V.

[0033] There are 6 miniature circuit breakers, which are respectively defined as the first input AC miniature circuit breaker 61, the second input AC miniature circuit breaker 62, the third input AC miniature circuit breaker 63, the output AC miniature circuit breaker 64, the first output DC miniature circuit breaker 65 and the second output DC miniature circuit breaker 66. The first input AC miniature circuit breaker 61 is arranged between the AC power supply and the input side of the isolation transformer 10. The second input AC miniature circuit breaker 62 is arranged between the AC power supply and the input side of the first adjustable DC power supply device 30. The third input AC miniature circuit breaker 63 is arranged between the AC power supply and the input side of the second adjustable DC power supply device 40. The first output DC miniature circuit breaker 65 is arranged on the output side of the first adjustable DC power supply device 30. The second output DC miniature circuit breaker 66 is arranged on the output side of the second adjustable DC power supply device 40. The input side of the output AC miniature circuit breaker 64 is connected to the output side of the isolation transformer 10, and the output side of the output AC miniature circuit breaker 64 is also connected to the input side of the autotransformer 20. All the miniature circuit breakers are 2-pole miniature circuit breakers. The rated current of the first input AC miniature circuit breaker 61, the second input AC miniature circuit breaker 62, the third input AC miniature circuit breaker 63 and the output AC miniature circuit breaker 64 is 10A. The rated current of the first output DC miniature circuit breaker 65 and the second output DC miniature circuit breaker 66 is 6A or 10A.

[0034] It should be noted that the miniature circuit breakers of the present utility model are distributed on the input and output sides of the four-channel power supply. The present utility model uses 2-pole miniature circuit breakers and performs thermal-magnetic envelope protection through a thermal release device and a magnetic trip. Compared with a 1-pole miniature circuit breaker, a 2-pole miniature circuit breaker can completely disconnect the circuit and provide balanced protection, maintain the balance of the circuit, and reduce electromagnetic interference and voltage offset. The miniature circuit breakers of the present utility model can achieve the following functions: (1) Overload protection: When the circuit current exceeds the maximum safe current allowed by the design and lasts for a period of time, the miniature circuit breaker will automatically trip to prevent the wire from overheating and potential fire risks. (2) Short-circuit protection: When a short circuit occurs in the circuit, that is, when the current suddenly increases sharply, the miniature circuit breaker can immediately respond and quickly cut off the current to protect electrical equipment from damage. (3) Isolation function: After the circuit breaker trips, it can be used as a disconnecting switch to ensure maintenance safety. (4) Installation convenience: The miniature circuit breaker is small in size, easy to install, and convenient for maintenance and replacement.

[0035] The isolation transformer 10 of the present utility model realizes electrical isolation between the input circuit and the output circuit. That is to say, even if there is an electrical fault or high voltage on the input side, it can prevent the voltage from directly affecting the output side and protect the safety of personnel and equipment. The isolation transformer 10 can also effectively block the noise and interference introduced from the power line, such as common-mode interference, and protect precision electronic equipment from the influence of power grid clutter. The isolation transformer 10 of the present utility model uses a single-phase isolation transformer 10, with an input voltage of 220V, an output voltage of 220V, a voltage accuracy of ±1%, and a capacity of 2kVA. The insulation resistance is not less than 150MΩ, the insulation class is F, the high temperature resistance is 150°C, and the cooling method is dry air cooling.

[0036] The autotransformer 20 of the present utility model smoothly adjusts the output voltage without changing the frequency. Since its primary and secondary windings share a winding, the copper and iron losses are reduced, so it has high efficiency, small size, light weight, and fast dynamic response. Although it does not achieve isolation between the primary and secondary sides by itself, connecting it to the rear end of an isolation transformer realizes the isolation between the input side of the isolation transformer and the output side of the autotransformer 20. The autotransformer 20 is a single-phase voltage regulator with a capacity of 500 VA, an input of 220 V, and an output of 0 V to 300 V.

[0037] The output power of the first adjustable DC power supply device 30 of the present utility model is 2000 W, the output voltage adjustment range is 10 V to 300 V, and the cooling method is air cooling. Its output limit current can be adjusted from 1 A to 6.6 A. The first adjustable DC power supply device 30 has multiple protections against overvoltage, overcurrent, and short circuit. The AC input voltage is processed into a high-frequency pulsed DC voltage after passing through a rectifier bridge, and the high-frequency pulsed DC voltage is sent to a high-frequency transformer. The function of the high-frequency transformer is to transfer energy while providing electrical isolation, that is, there is no direct electrical connection between the primary (input side) and the secondary (output side), preventing potential dangerous voltages from being directly transmitted to the load or the user. The output power of the second adjustable DC power supply device 40 of the present utility model is 500 W, the output voltage adjustment range is 0 V to 48 V, and the cooling method is air cooling. The second adjustable DC power supply device 40 has multiple protections against overvoltage, overcurrent, and short circuit. The AC input voltage is processed into a high-frequency pulsed DC voltage after passing through a rectifier bridge, and the high-frequency pulsed DC voltage is sent to a high-frequency transformer. The function of the high-frequency transformer is to transfer energy while providing electrical isolation, that is, there is no direct electrical connection between the primary (input side) and the secondary (output side), preventing potential dangerous voltages from being directly transmitted to the load or the user.

[0038] Voltmeter heads are provided with a first voltmeter head 51, a second voltmeter head 52, a third voltmeter head 53, and a fourth voltmeter head 54. The first voltmeter head 51 is arranged between the output side of the isolation transformer 10 and the input side of the output AC microswitch 64. The second voltmeter head 52 is arranged on the output side of the autotransformer 20. The third voltmeter head 53 is arranged between the output side of the first adjustable DC power supply device 30 and the first output DC microswitch 65. The fourth voltmeter head 54 is arranged between the output side of the second adjustable DC power supply device 40 and the second output DC microswitch 66.

[0039] The voltmeter head of the present utility model is used to realize the real-time monitoring of the output AC / DC voltage, facilitating the user to dynamically adjust the output voltage. The font size of the voltmeter head in this embodiment is 0.56 inches, with LED high-definition display. The measurement speed of the voltmeter head can be adjusted, which are 3.8 seconds / time, 7.6 seconds / time, and 15.2 seconds / time respectively. The measurement accuracy is 0.5 level, and the temperature drift coefficient is less than 100 ppm / °C.

[0040] The interface is provided with a first output interface 71, a second output interface 72, a third output interface 73, a fourth output interface 74, a fifth output interface 75, a sixth output interface 76, and an input interface 77. The first output interface 71 and the second output interface 72 are connected in parallel to the output side of the output AC micro breaker 64. The third output interface 73 and the fourth output interface 74 are arranged in parallel on the output side of the autotransformer 20. The fifth output interface 75 is connected to the output side of the first output DC micro breaker 65. The sixth output interface 76 is connected to the output side of the second output DC micro breaker 66. The input interface 77 is arranged between the second input AC micro breaker 62 and the input side of the first adjustable DC power supply device 30.

[0041] Among them, the first output interface 71, the fourth output interface 74, the fifth output interface 75, and the sixth output interface 76 are all banana interfaces; the second output interface 72, the third output interface 73, and the input interface 77 are all three-hole sockets.

[0042] The interface of the present utility model adopts two forms: panel banana sockets and three-hole sockets. The banana interface is a standard 4mm panel banana socket, with a pure copper terminal as the material, which fits with the 4mm standard test line plug and supports quick plugging and unplugging. The three-hole socket is a three-hole socket, with a rated current of 10A, a rated voltage of 300V, a rated power of 2.5kW, and is installed in a rail type.

[0043] The function operation instructions of the isolated adjustable AC / DC power supply box of the present utility model are as follows:

[0044] a) AC power input

[0045] Connect to the AC220V 50Hz power system through another three-pin plug power cord, and at this time, the built-in silent cooling fan starts.

[0046] b) Fixed AC power output of AC220V

[0047] Close the first input AC micro breaker 61, and the corresponding voltmeter head displays the voltage value to be output. Close the AC output micro breaker, and output voltage at the first output interface 71 and the second output interface 72.

[0048] c) Adjustable AC power output of AC0V~300V

[0049] Close the first AC input miniature circuit breaker and the AC output miniature circuit breaker. At this time, the corresponding voltmeter shows the current output voltage value. Adjust the voltage regulator handle until the required voltage is reached, and the voltage is output from the first output interface 71 and the second output interface 72.

[0050] d) Adjustable DC power supply output from DC 0V to 300V

[0051] Close the second input AC miniature circuit breaker 62. At this time, the corresponding voltmeter shows the voltage value to be output. Adjust the knob until the required voltage is reached, then close the first output DC miniature circuit breaker 65, and the voltage is output from the fifth output interface 75 and the second output interface 72.

[0052] e) Adjustable DC power supply output from DC 0V to 48V

[0053] Close the third AC input miniature circuit breaker. At this time, the corresponding voltmeter shows the voltage value to be output. Adjust the knob until the required voltage is reached, then close the second DC output miniature circuit breaker, and the voltage is output from the sixth output interface 76 and the second output interface 72.

[0054] Compared with the prior art, the isolated adjustable AC-DC power supply box of the present utility model has the following beneficial effects:

[0055] 1. Multifunctional integration: It is a power supply box that can provide both AC and DC power outputs, and both have a wide voltage adjustment range. For example, AC is from 0V to 300V, and DC is from 0V to 300V. Among them, DC is a combination of 0V to 48V and 10V to 300V, which solves the problem that traditional power supply boxes can only provide a single type of power supply. It can meet diverse test requirements, especially in environments where it is necessary to test AC and DC devices simultaneously or perform precise tests within a wide voltage range.

[0056] 2. High-precision voltage regulation: The adjustment accuracy of its power output reaches 0.5 level, which is much higher than the accuracy of 1% or lower in traditional technologies, ensuring that accurate power supply can be provided for high-precision test equipment such as relay protection devices, measurement and control devices, and monitoring devices, thereby improving the credibility and repeatability of test results.

[0057] 3. Enhanced electrical isolation and safety: The power supply box realizes effective electrical isolation between the input and output by integrating the isolation transformer 10 and the high-frequency transformer, ensuring complete isolation between the output side and the mains input side, reducing electrical interference, enhancing the safety of the test environment, and avoiding the influence of the external electrical environment on test results.

[0058] 4. Perfect safety control mechanism: The isolated adjustable AC-DC power supply box adds miniature circuit breakers at the input and output ends of each power supply circuit, and is equipped with independent miniature circuit breakers on the output side to quickly cut off the power supply in case of emergencies.

[0059] Strengthen the safety guarantee of operators and the flexibility of equipment use.

[0060] 5. Optimized humanized interface design. The isolated adjustable AC / DC power supply box adopts three-hole sockets and 4mm panel banana sockets, enabling users to quickly and firmly connect various test equipment, improving work efficiency, reducing connection errors and operation time. The interface of the present utility model can improve convenience and versatility, and its connection method is more modern and user-friendly.

[0061] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present utility model rather than to limit the protection scope of the present utility model. Although the present utility model has been described in detail with reference to the preferred embodiments, those of ordinary skill in the art should understand that the technical solutions of the present utility model can be modified or equivalently replaced without departing from the essence and scope of the technical solutions of the present utility model.

Claims

1. An isolated adjustable AC / DC power supply box, characterized in that: An isolation transformer, an autovoltage regulator, a first adjustable DC power supply device, a second adjustable DC power supply device, a voltmeter and a micro-breaker are provided. The isolation transformer, the first adjustable DC power supply device and the second adjustable DC power supply device are all connected to an AC power supply. The output side of the isolation transformer is also connected to the input side of the autovoltage regulator. The voltmeter is respectively connected to the output side of the isolation transformer, the output side of the first adjustable DC power supply device, the output side of the second adjustable DC power supply device and the output side of the autovoltage regulator. The micro-breaker is respectively provided on the input side of the isolation transformer, the output side of the isolation transformer, the input side of the first adjustable DC power supply device, the output side of the first adjustable DC power supply device, the input side of the second adjustable DC power supply device and the output side of the second adjustable DC power supply device.

2. The isolated adjustable AC / DC power supply box according to claim 1, characterized in that: There are 6 micro-breakers, which are respectively defined as a first input AC micro-breaker, a second input AC micro-breaker, a third input AC micro-breaker, an output AC micro-breaker, a first output DC micro-breaker and a second output DC micro-breaker. The first input AC micro-breaker is arranged between the AC power supply and the input side of the isolation transformer, the second input AC micro-breaker is arranged between the AC power supply and the input side of the first adjustable DC power supply device, the third input AC micro-breaker is arranged between the AC power supply and the input side of the second adjustable DC power supply device, the first output DC micro-breaker is arranged at the output side of the first adjustable DC power supply device, and the second output DC micro-breaker is arranged at the output side of the second adjustable DC power supply device. The input side of the output AC micro-breaker is connected to the output side of the isolation transformer, and the output side of the output AC micro-breaker is also connected to the input side of the autovoltage regulator.

3. The isolated adjustable AC / DC power supply box according to claim 2, characterized in that: The voltmeter is provided with a first voltmeter, a second voltmeter, a third voltmeter and a fourth voltmeter. The first voltmeter is arranged between the output side of the isolation transformer and the input side of the output AC micro-breaker, the second voltmeter is arranged at the output side of the autovoltage regulator, the third voltmeter is arranged between the output side of the first adjustable DC power supply device and the first output DC micro-breaker, and the fourth voltmeter is arranged between the output side of the second adjustable DC power supply device and the second output DC micro-breaker.

4. The isolated adjustable AC / DC power supply box according to claim 2, characterized in that: Interfaces are also provided, which are respectively arranged on the output side of the isolation transformer, the output side of the autovoltage regulator, the output side of the first adjustable DC power supply device, the input side of the first adjustable DC power supply device and the output side of the second adjustable DC power supply device.

5. The isolated adjustable AC / DC power supply box according to claim 4, characterized in that: The interface is provided with a first output interface, a second output interface, a third output interface, a fourth output interface, a fifth output interface, a sixth output interface and an input interface. The first output interface and the second output interface are connected in parallel to the output side of the output AC micro-breaker, the third output interface and the fourth output interface are arranged in parallel on the output side of the autocoupler, the fifth output interface is connected to the output side of the first output DC micro-breaker, the sixth output interface is connected to the output side of the second output DC micro-breaker, and the input interface is arranged between the second input AC micro-breaker and the input side of the first adjustable DC power supply device.

6. The isolated adjustable AC / DC power supply box according to claim 5, characterized in that: The first output interface, the fourth output interface, the fifth output interface and the sixth output interface are all banana interfaces; The second output interface, the third output interface and the input interface are all three-hole sockets.

7. The isolated adjustable AC / DC power supply box according to claim 1, characterized in that: The output power of the first adjustable DC power supply device is 2000W, and the output voltage adjustment range is 10V to 300V; The output power of the second adjustable DC power supply device is 500W, and the output voltage adjustment range is 0V to 48V.

8. The isolated adjustable AC / DC power supply box according to claim 7, characterized in that: The isolation transformer is a single-phase isolation transformer, and the input voltage of the isolation transformer is 220V, the output voltage is 220V, and the voltage accuracy is ±1%.

9. The isolated adjustable AC / DC power supply box according to claim 1, characterized in that: The auto-coupling voltage regulator is a single-phase voltage regulator, and the capacity of the auto-coupling voltage regulator is 500VA, the input voltage is 220V, and the output voltage is 0V-300V.

10. The isolated adjustable AC / DC power supply box according to claim 2, characterized in that: All the micro-breakers mentioned are 2-pole micro-breakers; The rated current of the first input AC micro-breaker, the second input AC micro-breaker, the third input AC micro-breaker and the output AC micro-breaker is 10A; The rated current of the first output DC micro-breaker and the second output DC micro-breaker is 6A or 10A.

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