阅读说明：本技术 一种电源隔离装置 (Power supply isolation device ) 是由 陈梁远 余长厅 赵坚 黎大健 张磊 饶夏锦 李锐 潘绍明 于 2021-08-27 设计创作，主要内容包括：本发明涉及一种电源隔离装置,涉及电源控制技术领域,包括有：隔离变压器、滤波器、过电压保护装置、保险、电压电流表、开关、插座、电源插口、外壳、电源线包、电源指示灯和接地端子。隔离变压器和滤波器,能够通过隔离、滤波,滤掉了各种干扰；电压电流表能够使使用者直观、方便和快速地判断输出电源的状态；电源线包使电源线和插线板方便收纳和携带,防止丢失,且电源线包与外壳的顶部通过魔术贴连接。本发明具有抗干扰能力强、保护全面、监视方便、使用方便等优点,能够有效消除来自电源的干扰,为测量工作提供可靠优质的电源。(The invention relates to a power isolation device, which relates to the technical field of power control and comprises the following components: isolation transformer, wave filter, overvoltage protection device, insurance, volt ammeter, switch, socket, power socket, shell, power solenoid, power indicator lamp and ground terminal. The isolation transformer and the filter can filter various interferences through isolation and filtering; the voltage ammeter can enable a user to visually, conveniently and quickly judge the state of the output power supply; the power supply solenoid makes power cord and wiring board conveniently accomodate and carry, prevents to lose, and the power supply solenoid passes through the magic subsides with the top of shell and is connected. The invention has the advantages of strong anti-interference capability, comprehensive protection, convenient monitoring, convenient use and the like, can effectively eliminate the interference from the power supply and provides a reliable and high-quality power supply for the measurement work.)

1. A power isolation device, comprising: the method comprises the following steps: the device comprises an isolation transformer (1), a filter (2), an overvoltage protection device (3), a fuse (4), a voltage ammeter (5), a switch (6), a socket (7), a power socket (8), a shell (9), a power coil (10), a power indicator lamp (11) and a grounding terminal (12);

the power socket (8), the filter (2) and the isolation transformer (1) are electrically connected in sequence, the isolation transformer (1) is respectively and electrically connected with the voltage ammeter (5), the switch (6), the socket (7), the power indicator (11) and the shell (9), and the switch (6) is respectively and electrically connected with the power indicator (11) and the socket (7); one connecting wire between the power socket (8) and the filter (2) is connected with the overvoltage protection device (3); the power socket (8) is electrically connected with the overvoltage protection device (3);

the grounding terminal (12) is connected with the shell (9);

the isolation transformer (1), the filter (2), the overvoltage protection device (3), the fuse (4), the voltage ammeter (5), the switch (6), the socket (7) and the power socket (8) are arranged inside the shell (9), and the fuse (4), the power socket (8), the voltage ammeter (5), the switch (6), the socket (7) and the power indicator (11) are respectively clamped at an opening of the shell (9);

the shell (9) is a hard shell made of a conductive material;

the power supply solenoid (10) is detachably connected to the housing (9).

2. A power isolation device as claimed in claim 1, wherein: the shell (9) is made of stainless steel.

3. A power isolation device as claimed in claim 1, wherein: the isolation transformer (1) is a 220VAC/220VAC annular iron core transformer, and has a double-layer copper foil electrostatic shielding and grounding wire structure and withstand voltage of 4000V.

4. A power isolation device as claimed in claim 1, wherein: the input voltage of the filter (2) is 110-250 VAC.

5. A power isolation device as claimed in claim 1, wherein: the voltage ammeter (5) can simultaneously display an alternating current voltage value and an alternating current value.

6. A power isolation device as claimed in claim 1, wherein: the switch (6) is an air switch with overcurrent protection and short-circuit protection.

7. A power isolation device as claimed in claim 1, wherein: the power supply solenoid (10) comprises a power supply wire (101) and a patch board (102).

8. A power isolation device as claimed in claim 1, wherein: the power supply solenoid (10) is connected with the shell (9) through a magic tape.

Technical Field

The invention belongs to the technical field of power supply control, and particularly relates to a power supply isolation device.

Background

In a substation, various interference signals exist in a 220V power supply line due to corona discharge, a strong electromagnetic environment, and the like. In winding deformation test and partial discharge test, the judgment of the test result depends on the judgment of the atlas to a great extent, but the instrument is often influenced by various interference signals in the test process, so that the test result is abnormal, the judgment of the test result is influenced, troubles are brought to the test work of testers, sometimes, even misjudgment and missed judgment occur, and hidden dangers are brought to the safe operation of the power equipment. The interference from the power supply, which affects the test results, accounts for a large proportion of the interference, especially in the case of severe electromagnetic interference in the station. The influence of power supply interference is eliminated, and the significance of accurate judgment of a test result is great.

Disclosure of Invention

In view of the above problems, the present invention provides a power isolation apparatus capable of effectively eliminating interference from a power supply by providing a filter, an isolation transformer, and the like.

In order to achieve the purpose, the invention adopts the following technical scheme:

a power isolation device comprising: the device comprises an isolation transformer, a filter, an overvoltage protection device, a fuse, a voltage ammeter, a switch, a socket, a power socket, a shell, a power coil, a power indicator lamp and a grounding terminal;

the power socket, the filter and the isolation transformer are electrically connected in sequence, the isolation transformer is electrically connected with the voltage ammeter, the switch, the socket, the power indicator and the shell respectively, and the switch is electrically connected with the power indicator and the socket respectively; one connecting wire between the power socket and the filter is connected with the overvoltage protection device; the power socket is electrically connected with the overvoltage protection device;

the grounding terminal is connected with the shell;

the isolation transformer, the filter, the overvoltage protection device, the fuse, the voltage ammeter, the switch, the socket and the power socket are arranged in the shell, and the fuse, the power socket, the voltage ammeter, the switch, the socket and the power indicator lamp are respectively clamped at the opening of the shell;

the shell is a hard shell made of a conductive material;

the power supply solenoid is detachably connected with the housing.

Further, the shell is made of stainless steel.

Furthermore, the isolation transformer is a 220VAC/220VAC annular iron core transformer, and has a double-layer copper foil electrostatic shielding and grounding wire structure and withstand voltage of 4000V. The main function of the isolation transformer is to completely insulate the primary side from the secondary side and also to isolate the circuit. In addition, the characteristic of large high-frequency loss of the iron core is utilized, and high-frequency clutter can be inhibited from being transmitted into the control loop; the double-layer copper foil electrostatic shielding and grounding wire structure is adopted, and various interferences can be inhibited after the double-layer copper foil electrostatic shielding is grounded; the characteristic of 4000V withstand voltage enables the isolation transformer to have better insulating property, and prevents overvoltage impact damage.

Furthermore, the input voltage of the filter is 110-250 VAC, and the wide voltage range enables the device to be suitable for more occasions.

Further, the volt-ampere meter can simultaneously display an alternating current voltage value and an alternating current value, a user can visually, conveniently and quickly judge the state of an output power supply, and the abnormity of connected instruments and equipment caused by power quality problems or overload is avoided.

Furthermore, the switch is an air switch with overcurrent protection and short-circuit protection, and the influence of faults such as short circuit of instrument equipment on the isolation transformer and even the power supply can be prevented.

Further, the power solenoid includes power cord and wiring board, and power supply and device can be connected to the former, and latter connecting device and instrument equipment are conveniently accomodate and are carried, prevent to lose.

Furthermore, the power supply solenoid and the shell are connected through a magic tape.

The invention has the beneficial effects that:

1. according to the power supply isolation device provided by the invention, the power line is provided for the power socket through the power line package to be connected with the power supply, the current of the power supply passes through the socket after being isolated and filtered through the voltage protection device, the fuse, the filter and the transformer, and various interferences of the power supply can be filtered through the filter and the isolation transformer, so that the amplitude of a low-frequency interference signal is greatly attenuated, and the purposes of interference suppression and strong anti-interference capability are achieved; the socket supplies power for the instrument equipment, the output voltage of the power supply isolation device is displayed in real time through the voltage ammeter, a user can judge the state of the output power supply visually, conveniently and quickly through the voltage ammeter, and the abnormity of the instrument equipment connected due to the power quality problem or overload is avoided. The voltage protection device and the switch prevent the influence of faults such as overvoltage, short circuit and the like on the invention, and the protection is comprehensive. The power supply solenoid can be conveniently stored, carried and disassembled for washing.

2. The invention has double-layer copper foil electrostatic shielding, grounding wire structure and 4000V withstand voltage isolation transformer and filter, can filter various interferences through isolation and filtering, and greatly attenuate the amplitude of low-frequency interference signals, thereby achieving the purposes of interference suppression and strong anti-interference capability;

3. the invention prevents the influence of faults such as overvoltage, short circuit and the like on the invention through the overvoltage protection device and the air switch, and the protection is comprehensive.

4. The arrangement of the voltage ammeter can lead a user to judge the state of the output power supply intuitively, conveniently and quickly, and avoid the abnormity of connected instruments caused by power quality problems or overload.

5. Set up power solenoid and make power cord and wiring board conveniently accomodate and carry, prevent to lose, and the power solenoid passes through the magic with the top of shell and pastes and be connected, makes things convenient for the power solenoid to tear open and wash, and the wiring board has reduced the socket and has been frequently inserted and pulled.

The invention has the advantages of strong anti-interference capability, comprehensive protection, convenient monitoring, convenient use and the like, can effectively eliminate the interference from the power supply and provides a reliable and high-quality power supply for the measurement work.

Drawings

In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings used in the description of the embodiments will be briefly introduced below.

FIG. 1 is a schematic diagram of the internal structure of the power isolation device of the present invention;

FIG. 2 is a front view of the power isolation device of the present invention;

fig. 3 is a rear view of the power isolation device of the present invention.

1, an isolation transformer; 2. a filter; 3. an overvoltage protection device; 4. a fuse; 5. a voltage ammeter; 6. a switch; 7. a socket; 8. a power outlet; 9. a housing; 10. a power supply coil; 11. a power indicator light; 12. a ground terminal; 101. a power line; 102. a patch board.

Detailed Description

The technical solution in the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present invention. It is to be understood that the described embodiments are merely exemplary of the invention, and not restrictive of the full scope of the invention. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.

In the description of the present invention, it is to be understood that the terms "central," "longitudinal," "lateral," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," and the like are used in the orientations and positional relationships indicated in the drawings for convenience in describing the present invention and for simplicity in description, and are not intended to indicate or imply that the referenced devices or elements must have a particular orientation, be constructed and operated in a particular orientation, and are therefore not to be considered limiting. Furthermore, the terms "first", "second", etc. are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defined as "first," "second," etc. may explicitly or implicitly include one or more of the feature. In the description of the present invention, "a plurality" means two or more unless otherwise specified.

In the description of the present invention, it should also be noted that, unless otherwise explicitly specified or limited, the terms "disposed," "connected," and the like are to be construed broadly and may, for example, be fixedly connected, detachably connected, or integrally connected; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meanings of the above terms in the present invention can be understood in specific cases to those skilled in the art.

Referring to fig. 1, fig. 2 and fig. 3, a power isolation apparatus provided by the present invention includes: the device comprises an isolation transformer 1, a filter 2, an overvoltage protection device 3, a fuse 4, a voltage ammeter 5, a switch 6, a socket 7, a power socket 8, a shell 9, a power coil package 10, a power indicator lamp 11 and a grounding terminal 12;

the positive terminal of the power socket 8 is electrically connected with the positive input end of the filter 2, and the negative terminal of the power socket 8 is electrically connected with the negative input end of the filter 2; the positive and negative terminals of the filter 2 are respectively and electrically connected with the input end of the isolation transformer 1, the positive output end of the isolation transformer 1 is respectively and electrically connected with the voltage ammeter 5, the power indicator lamp 11 and the positive electrode of the socket 7, the negative output end of the isolation transformer 1 is respectively and electrically connected with the voltage ammeter 5 and the negative electrode of the switch 6, the positive electrode of the switch 6 is respectively and electrically connected with the socket 7 and the negative electrode of the power indicator lamp 11, and the on-off state of the switch 6 can be visually observed through the power indicator lamp 11; the grounding end of the isolation transformer 1 is connected with the shell, and personnel are prevented from being injured by the induced electricity of the transformer substation through the grounding end of the isolation transformer 1;

the fuse 4 is arranged between the positive terminal of the power socket 8 and the positive input end of the filter 2 and is used for protecting a power supply;

the positive pole terminal and the negative pole terminal of the overvoltage protection device 3 are respectively and correspondingly electrically connected with the positive pole terminal and the negative pole terminal of the power socket 8;

the grounding terminal 12 is connected with the shell 9, so that personnel are prevented from being damaged by the induced electricity of the transformer substation;

the isolation transformer 1, the filter 2, the overvoltage protection device 3, the fuse 4, the voltage ammeter 5, the switch 6, the socket 7 and the power socket 8 are arranged in the shell 9, and the fuse 4, the power socket 8, the voltage ammeter 5, the switch 6, the socket 7 and the power indicator lamp 11 are respectively clamped at an opening of the shell 9;

the shell 9 is a hard shell made of conductive material;

the power supply package 10 is detachably connected to the housing 9.

According to the power supply isolation device, the power line 101 is provided for the power socket 8 through the power line package 10 to be connected with the power supply, various interferences of the power supply can be filtered through the filter 2 and the isolation transformer 1, and the amplitude of a low-frequency interference signal is greatly attenuated, so that the purposes of interference suppression and strong anti-interference capability are achieved; meanwhile, overvoltage interception is carried out through the voltage protection device 3; the current of power supply passes through pressure protection device 3, fuse 4, filter 3 and transformer 1 and keeps apart the filtering back and pass through socket 7, supplies power for instrument and equipment through socket 7, shows power isolation device's output voltage in real time through volt ammeter 5, can make the user directly perceived, convenient and judge output power's state fast through volt ammeter 5, avoids taking place unusually because of power quality problem or transshipping the instrument and equipment that leads to connecting. The voltage protection device 3 and the switch 6 prevent the influence of faults such as overvoltage, short circuit and the like on the invention, and protect the invention comprehensively. Through power solenoid 10 with dismantling, conveniently accomodate and carry, prevent to lose, and the power solenoid passes through the magic with the top of shell and pastes and be connected, makes things convenient for the power solenoid to tear open and wash.

In one embodiment, the housing 9 is made of stainless steel, and the stainless steel has good protection performance and corrosion prevention characteristics, so that the housing also has good protection performance and corrosion prevention characteristics.

In one embodiment, the isolation transformer 1 is a 220VAC/220VAC toroidal core transformer having a double-layer copper foil electrostatic shielding and grounding wire structure with a withstand voltage of 4000V. The main function of the isolation transformer 1 is to completely insulate the primary side from the secondary side and also to isolate the circuit. In addition, the characteristic of large high-frequency loss of the iron core is utilized, and high-frequency clutter can be inhibited from being transmitted into the control loop; the double-layer copper foil electrostatic shielding and grounding wire structure is adopted, and various interferences can be inhibited after the double-layer copper foil electrostatic shielding is grounded; the characteristic of 4000V withstand voltage enables the isolation transformer to have better insulating property and prevent overvoltage impact damage, and preferably, the type of the isolation transformer 1 is EEIO-C1000 VA.

In one embodiment, the input voltage of the filter 2 is 110-250 VAC, the wide voltage range enables the device to be suitable for more occasions, and preferably, the type of the filter 2 is CW4L 2-10A-R.

In one embodiment, the voltage/current meter 5 can simultaneously display an alternating current voltage value and an alternating current value, so that a user can visually, conveniently and quickly judge the state of an output power supply, and the abnormality of connected instruments and equipment caused by power quality problems or overload is avoided, and preferably, the voltage/current meter 5 is PZEM-021.

In one embodiment, the switch 6 is an air switch with overcurrent protection and short-circuit protection, which can prevent the fault such as short circuit of the instrument and equipment from affecting the isolation transformer and even the power supply, and preferably, the type of the switch 6 is NXB-63. The power supply solenoid 10 includes a power supply line 101 capable of connecting a power supply and a device, and a patch board 102 connecting the device and an instrument apparatus, which is convenient to store and carry and is prevented from being lost. The overvoltage protection device 3 can prevent damage to the device from overvoltage, and preferably, the overvoltage protection device 3 is 10D 471K.

In one embodiment, the power pack 10 includes a power cord 101 and a patch board 102, the power cord 101 is used for connecting the power socket 8 to a power supply, and the patch board 102 is used for providing a corresponding interface for the instrument.

In one embodiment, the power supply solenoid 10 is connected with the top of the shell 9 through the magic tape, the power supply solenoid 10 is convenient to detach through the magic tape, the power supply solenoid 10 is convenient for the power supply wire 101, the wiring board 102 or other tools to be stored and carried, the power supply solenoid is prevented from being lost, the power supply solenoid is connected with the top of the shell through the magic tape, and the power supply solenoid is convenient to detach and wash.

In one embodiment, the housing 9 is a hollow cuboid structure, a plurality of first mounting holes for mounting the voltage ammeter 5, the switch 6 and the power indicator 11 are formed in the front face of the housing 9, the ammeter 5, the switch 6, the indicator 11 and the socket 7 are sequentially embedded in the first mounting holes from left to right, and the circuits and the connecting line related structures of the ammeter 5, the switch 6, the indicator 11 and the socket 7 are arranged in the housing 9. The back of the shell 9 is provided with a plurality of second mounting holes for mounting the fuse 4, the power socket 8 and the ground terminal 12, the fuse 4 and the power socket 8 are sequentially inlaid in the second mounting holes from left to right.

The method of operation of the power isolation device of the present invention is described in detail to enable those skilled in the art to better understand the present invention:

in use, referring to fig. 2 and 3, the power cord 101 and the patch board 102 are taken out from the power cord package 10, one end of the power cord 101 is connected to a power supply, the other end of the power cord 101 is connected to the power jack 8, the plug of the patch board 102 is connected to the socket 7, whether the volt ammeter 5 is within the range of 220 (1 ± 10%) VAC or not is observed, if yes, the switch 6 is closed, otherwise, the cause of low voltage is found out. After the switch 6 is closed, the instrument equipment is connected to the patch board 102, whether the voltage ammeter 5 is in the range of 220 (1 +/-10%) VAC or not is observed, if yes, the test can be carried out, and otherwise, the isolation transformer 1 with larger capacity is replaced.

When the power supply has overvoltage, the overvoltage protection device 3 acts to cut off the overvoltage. When the power supply has interference such as high frequency, the isolation transformer 1 and the filter 2 isolate and filter the interference. When short circuit or overload occurs in the power isolation device, instruments and circuits, the fuse 4 and the switch 6 act to cut off a fault part.

In conclusion, the power supply isolation device has the advantages of strong anti-interference capability, comprehensive protection, convenience in monitoring, convenience in use and the like, can effectively eliminate interference from a power supply, and provides a reliable and high-quality power supply for measurement work.

The above description is only for the specific embodiments of the present invention, but the scope of the present invention is not limited thereto, and any changes or substitutions that can be easily conceived by those skilled in the art within the technical scope of the present invention are included in the scope of the present invention. Therefore, the protection scope of the present invention shall be subject to the protection scope of the claims.