CN217689264U - Pure sine wave electronic voltage regulation control box - Google Patents
Pure sine wave electronic voltage regulation control box Download PDFInfo
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- CN217689264U CN217689264U CN202221739455.1U CN202221739455U CN217689264U CN 217689264 U CN217689264 U CN 217689264U CN 202221739455 U CN202221739455 U CN 202221739455U CN 217689264 U CN217689264 U CN 217689264U
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Abstract
The utility model relates to a pure sine wave electron pressure regulating control box, include the box, the box is equipped with PA electronic ampere meter, PV electron voltmeter, SP straight slide potentiometer, first output terminal, second output terminal, ground terminal, voltage divider measurement input terminal, duplex switch, voltage divider measurement input terminal electric connection is in PV electron voltmeter signal input part, PA electronic ampere meter electronic output end electric connection is in first output terminal; pure sine wave electronic voltage regulator, pure sine wave electronic voltage regulator sets up in the box, PA electronic ampere meter electronic input end electric connection in pure sine wave electronic voltage regulator output, SP straight sliding potentiometer electric connection in pure sine wave electronic voltage regulator. The utility model discloses reduce equipment weight, guarantee that power equipment test work is more lightweight, intelligent.
Description
Technical Field
The utility model relates to the field of electrical technology, especially, relate to a pure sine wave electronic voltage regulation control box.
Background
In order to ensure that the power equipment insulation structure can bear the effects of power frequency working voltage, temporary overvoltage, operation overvoltage and lightning overvoltage, a power frequency alternating current voltage withstand test needs to be carried out on the equipment insulation structure, and sufficient insulation margin is ensured.
At present, an alternating current power frequency withstand voltage test device is generally adopted to carry out a power frequency alternating current withstand voltage test on tested articles (such as a mutual inductor, a circuit breaker, a lightning arrester, an overvoltage protector and the like) with small capacity in electrical equipment with the voltage class of 35 kV or below. The power frequency alternating current voltage withstand test device generally comprises 3 kVA and 5 kVA oil-immersed (dry) test transformers, 100 kV voltage dividers, current-limiting resistors, protective resistors, a control box and the like, all the devices are relatively independent, a test field is formed by connecting and combining test lines, and the used control box is formed by combining a column type self-coupling voltage regulator, a control loop, an overcurrent relay type protection, a measurement loop, a signal loop and the like. When the test voltage is higher, the requirement of the test voltage is met by adopting a multistage test transformer cascade.
The traditional voltage measuring method is that a low-voltage side measuring winding of a test transformer is connected to a measuring terminal of a control box, a boosted voltage value is read by observing a pointer type voltmeter on the control box, but partial voltage can be divided due to impedance of the test transformer, and the voltage can be subjected to capacity rise after a tested object is pressurized, so that the voltage measured from the low-voltage side is lower than an actual value, and the accuracy of the voltage applied to the tested object can not be ensured. With the development of the technology, some manufacturers adopt an externally-arranged high-voltage divider RCF to be connected with a tested product Cx in parallel, and directly measure the test applied voltage from the primary side so as to obtain a more accurate test voltage value, but a meter head is not arranged in a control box, so that the operation and observation are still inconvenient.
Although the power frequency alternating current withstand voltage test device can meet the test requirements, some problems also exist in the using process: (1) The column type voltage regulator is a mechanical voltage regulation, and the contact and the electric brush are easy to wear, thereby causing abnormal phenomena such as poor contact, ignition and the like; (2) the pressure regulating precision of the column type pressure regulator is not high; (3) The column type voltage regulator is operated in a rotating mode, insulating gloves need to be worn when the boosting operation is required by safety regulations, the operation is not easy to carry out after the insulating gloves are worn, and an operating handle is difficult to rotate accurately; (4) The voltmeter on the control box is used for measuring the voltage of the winding from the secondary side of the test transformer, although the observation and counting are convenient, the actual voltage applied to the tested object cannot be accurately reflected; (5) The test power supply voltage has a fluctuation phenomenon, the output test voltage is unstable, and the control box has no overvoltage protection function and the like.
SUMMERY OF THE UTILITY MODEL
The utility model aims at providing an improve experimental precision and the degree of accuracy, reduce equipment weight guarantees that power equipment test work is more lightweight, intelligent.
In order to achieve the above purpose, the utility model adopts the following technical scheme:
a pure sine wave electronic pressure regulating control box, which comprises,
the device comprises a box body, a power supply module and a control module, wherein the box body is provided with a PA electronic ammeter, a PV electronic voltmeter, an SP direct-sliding potentiometer, a first output wiring terminal, a second output wiring terminal, a grounding wiring terminal, a voltage divider measurement input wiring terminal and a duplex switch, the voltage divider measurement input wiring terminal is electrically connected to a signal input end of the PV electronic voltmeter, and an electronic output end of the PA electronic ammeter is electrically connected to the first output wiring terminal;
the pure sine wave electronic voltage regulator is arranged in the box body, the electronic input end of the PA electronic ammeter is electrically connected to the output end of the pure sine wave electronic voltage regulator, and the SP direct sliding potentiometer is electrically connected to the pure sine wave electronic voltage regulator;
the control unit is arranged in the box body, the PA electronic ammeter and the PV electronic voltmeter power supply end are electrically connected with the control unit, and the pure sine wave electronic voltage regulator power supply input end, the second output binding post, the duplex switch and the SP direct sliding potentiometer are all electrically connected with the control unit;
the SP direct-sliding potentiometer is electrically connected with the pure sine wave electronic voltage regulator by a voltage division connection method.
Furthermore, the control unit comprises seven loops after the power supply passes through the FU fuse,
the system comprises a first loop, an SP direct-sliding potentiometer, a coil of a KM alternating current contactor, an SB2 opening switch, an SB3 emergency stop switch, a normally closed contact of a PA electronic ammeter and a normally closed contact of a PV electronic voltmeter, wherein the SP direct-sliding potentiometer is connected with an SB1 closing switch, the coil of the KM alternating current contactor, the SB2 opening switch, the SB3 emergency stop switch, the normally closed contact of the PA electronic ammeter and the normally closed contact of the PV electronic voltmeter are sequentially connected, a first linkage normally open contact of the KM alternating current contactor is connected with the SP direct-sliding potentiometer and the SB1 closing switch which are connected in series in parallel, and HY zero position indication is connected with the SP direct-sliding potentiometer in series;
in the second loop, a first linkage normally closed contact of the KM alternating-current contactor is connected with an HG working power indicator lamp in series;
in the third loop, a second linkage normally open contact of the KM alternating-current contactor is connected with an HR output indicator lamp in series;
in the fourth loop, a coil of the KT time relay is connected in series with a closing switch of the SB4 relay;
in the fifth loop, a delay closed contact of a KT time relay is connected in series with an audible and visual alarm;
the sixth loop is connected with a power supply end of the PA electronic ammeter;
the seventh loop is connected with a power supply end of the PV electronic voltmeter;
and the SP direct-sliding potentiometer is connected into the first loop in a current-limiting manner.
Further, SB1 closing switch and HG power indicator are green from restoring to the throne and take lamp button switch, SB2 separating brake switch and HR output indicator are red from restoring to the throne and take lamp button switch.
Furthermore, the electric end of the pure sine wave electronic voltage regulator is connected with a third linkage normally open contact and a fourth linkage normally open contact of the KM alternating current contactor in series and then is connected with the fire wire end and the zero wire end of the duplex switch.
Further, the voltage divider measurement input terminal adopts a Q9 connector.
The utility model has the advantages that:
due to the application of the utility model, the test field test device and accessories are reduced, the wiring is more concise, the equipment volume is reduced, the weight is lightened, and the carrying and the transportation are more facilitated; after the voltage regulator is replaced by a pure sine wave electronic voltage regulator, no mechanical contact is needed, the voltage regulation is realized in a push-pull mode, the operation is more convenient, the use is safer, the precision is improved, and meanwhile, the voltage regulator has the functions of voltage stabilization, over-temperature, over-current short circuit and surge protection, the pollution to a power grid is reduced, the power factor is improved, and the output voltage is stable; the test voltage sampling of the control box is directly connected to the control box instrument through the voltage divider, so that the observation and counting are convenient, and the voltage measured from the primary side is more accurate; the electronic voltmeter has an overvoltage protection function, and when the test voltage exceeds a set voltage value, the boosting loop is directly cut off, the tested equipment is protected, and the damage of the tested equipment due to overvoltage is avoided.
Other advantages, objects, and features of the invention will be set forth in part in the description which follows and in part will become apparent to those having ordinary skill in the art upon examination of the above or may be learned from practice of the invention. The objectives and other advantages of the invention may be realized and attained by the structure particularly pointed out in the appended drawings.
Drawings
Fig. 1 is a schematic structural view of a box panel.
Fig. 2 is a schematic diagram of the internal circuit structure of the control box.
Fig. 3 is a schematic wiring diagram for improved detection.
Detailed Description
The invention will be further described with reference to examples of embodiments shown in the drawings.
As shown in fig. 1 to 2, a pure sine wave electronic voltage regulating control box comprises,
the device comprises a box body, a Power Amplifier (PA) electronic ammeter 1, a Photovoltaic (PV) electronic voltmeter 16, a direct Sliding Potentiometer (SP) 12, a first output wiring terminal 41, a second output wiring terminal 42, a grounding wiring terminal 2, a voltage divider measurement input wiring terminal 3 and a duplex switch 7, wherein the voltage divider measurement input wiring terminal 3 is electrically connected with a signal input end of the PV electronic voltmeter 16, and an electronic output end of the PA electronic ammeter 1 is electrically connected with the first output wiring terminal 41;
the pure sine wave electronic voltage regulator 17 is arranged in the box body, the electronic input end of the PA electronic ammeter 1 is electrically connected to the output end of the pure sine wave electronic voltage regulator 17, and the SP direct sliding potentiometer 12 is electrically connected to the pure sine wave electronic voltage regulator 17;
the control unit is arranged in the box body, power supply ends of the PA electronic ammeter 1 and the PV electronic voltmeter 16 are electrically connected with the control unit, and a power supply input end of the pure sine wave electronic voltage regulator 17, a second output binding post 42, the double-link switch 7 and the SP direct-sliding potentiometer 12 are electrically connected with the control unit;
the SP direct sliding potentiometer 12 is electrically connected to the pure sine wave electronic voltage regulator 17 by a voltage division connection method, and an electrical end of the pure sine wave electronic voltage regulator 17 is connected to a live wire end and a zero wire end of the duplex switch after being connected in series with a third linkage normally open contact and a fourth linkage normally open contact of the KM ac contactor respectively.
Further, as shown in fig. 2, the circuit in the specific case includes seven loops after the power supply passes through FU fuse 5,
in the first loop, the SP direct-sliding potentiometer 12 is connected with the SB1 closing switch 14, and then is sequentially connected with a coil of the KM alternating current contactor, an SB2 opening switch 11, an SB3 emergency stop switch 8, a normally closed contact of the PA electronic ammeter 1 and a normally closed contact of the PV electronic voltmeter 16, a first linkage normally open contact of the KM alternating current contactor is connected with the SP direct-sliding potentiometer 12 and the SB1 closing switch 14 which are connected in series in parallel, and an HY zero position indicator 13 is connected with the SP direct-sliding potentiometer 12 in series;
in the second loop, a first linkage normally closed contact of the KM alternating-current contactor is connected with an HG working power indicator lamp in series;
in the third loop, a second linkage normally open contact of the KM alternating-current contactor is connected with an HR output indicator lamp in series;
in the fourth loop, a coil of the KT time relay 15 is connected in series with the SB4 relay closing switch 10;
in a fifth loop, a delay closed contact of the KT time relay 15 is connected in series with the audible and visual alarm 9;
the sixth loop is connected with a power supply end of the PA electronic ammeter 1;
the seventh loop is connected with a power supply end of the PV electronic voltmeter 16;
wherein, the SP direct sliding potentiometer 12 is connected into the first loop in a current-limiting manner.
Further, in order to reduce the use of parts, SB1 closing switch 14 and HG power indicator are green from restoring to the throne and take lamp button switch, SB2 separating brake switch 11 and HR output indicator are red from restoring to the throne and take lamp button switch.
Furthermore, in order to facilitate quick electrical connection, the voltage divider measurement input terminal 3 adopts a Q9 connector.
How this is done is explained in detail below, as shown in figure 3,
wherein, PV electron voltmeter model: DM3A-Vn-R3, manufacturer: shenzhen Chuanchun Instrument Co., ltd;
PA electronic ammeter model: DM3A-A6-R3, manufacturer: shenzhen Chuanhong Instrument Co., ltd;
pure sine wave electronic voltage regulator model: ZX-2000W, manufacturer: shanghai moon electron
The model of the 100mm stroke straight sliding potentiometer is as follows: SCA1005,0 to 10kOmega manufacturers: guangdong Shengwei electronic products Co Ltd
18, testing a transformer; 19. a current limiting resistor; 20. a resistive-capacitive voltage divider; 21. a test article; 22. a ball gap protection resistor; 23. the ball gap.
A first output binding post 41 and a second output binding post 42 of the control box are connected to the low-voltage side of the test transformer 18, the output end of the high-voltage side of the transformer is connected with the current-limiting resistor 19 in series, the output of the voltage divider is connected to the input terminal of the control box, and the voltage divider measures the input binding post 3, so that the accessory types are reduced.
Connecting the three-hole socket 6 of the operation box with mains supply, closing the 32A/2P duplex switch 7, turning on an HG working power supply indicator at the moment, if the HY zero position indicator lamp 13 is not turned on, pushing the SP direct-sliding potentiometer 12 to adjust to the zero position, pressing a starting switch SB1 after HY is turned on, turning off HG, and turning on a power supply HR output indicator lamp at the moment;
pushing the SP direct-sliding potentiometer 12 again to adjust the output voltage, extinguishing HY, directly controlling the voltage amplitude at each moment by changing the access position of the SP direct-sliding potentiometer 12, realizing stepless voltage adjustment, outputting stable voltage, keeping the waveform and the frequency the same as those of mains supply, pressing an SB4 relay switch-on switch 10 when the reading of the PV electronic voltmeter reaches the standard value of the withstand voltage of the tested product, and working an audible and visual alarm 9 when the withstand voltage time reaches a set value;
and then, the SP direct-sliding potentiometer 12 is pushed to a zero position, when HY is lightened, the switch-off switch SB2 is pressed, HR is extinguished, HG is lightened, and the alternating-current withstand voltage test process of the equipment is completed.
In the process of an alternating-current withstand voltage test, when the test voltage exceeds a set overvoltage value, a normally closed contact of the PV electronic voltmeter 16 is opened so as to cut off a boosting loop and protect the tested equipment; when a tested product is broken down and the loop current increases sharply, the loop is cut off by breaking the normally closed contact of the PA electronic ammeter 1, and the test device is protected; if an abnormal phenomenon occurs in the alternating current withstand voltage test process, the SB3 emergency stop switch can be pressed down in time to cut off the boosting loop, so that the tested article and the test device are protected, and all factors endangering personal safety are avoided.
Claims (5)
1. A pure sine wave electronic pressure regulating control box is characterized by comprising,
the device comprises a box body, wherein the box body is provided with a PA electronic ammeter (1), a PV electronic voltmeter (16), an SP direct-sliding potentiometer (12), a first output binding post (41), a second output binding post (42), a grounding binding post (2), a voltage divider measurement input binding post (3) and a duplex switch (7), the voltage divider measurement input binding post (3) is electrically connected to a signal input end of the PV electronic voltmeter (16), and an electronic output end of the PA electronic ammeter (1) is electrically connected to the first output binding post (41);
the device comprises a pure sine wave electronic voltage regulator (17), wherein the pure sine wave electronic voltage regulator (17) is arranged in a box body, an electronic input end of a PA electronic ammeter (1) is electrically connected to an output end of the pure sine wave electronic voltage regulator (17), and an SP straight sliding potentiometer (12) is electrically connected to the pure sine wave electronic voltage regulator (17);
the control unit is arranged in the box body, power ends of the PA electronic ammeter (1) and the PV electronic voltmeter (16) are electrically connected with the control unit, and a power input end of the pure sine wave electronic voltage regulator (17), the second output binding post (42), the duplex switch (7) and the SP direct slide potentiometer (12) are electrically connected with the control unit;
the SP direct-sliding potentiometer (12) is electrically connected with the pure sine wave electronic voltage regulator (17) in a voltage division connection mode.
2. Pure sine wave electronic voltage regulation control box according to claim 1, characterized in that the control unit comprises seven loops after passing through FU fuse (5) for power supply,
in the first loop, an SP direct-sliding potentiometer (12) is connected with an SB1 closing switch (14), and then is sequentially connected with a coil of a KM alternating-current contactor, an SB2 opening switch (11), an SB3 emergency stop switch (8), a normally closed contact of a PA electronic ammeter (1) and a normally closed contact of a PV electronic voltmeter (16), a first linkage normally open contact of the KM alternating-current contactor is connected with the SP direct-sliding potentiometer (12) and the SB1 closing switch (14) which are connected in series in parallel, and an HY zero position indication (13) is connected with the SP direct-sliding potentiometer (12) in series;
in the second loop, a first linkage normally closed contact of the KM alternating-current contactor is connected with an HG working power indicator lamp in series;
in the third loop, a second linkage normally open contact of the KM alternating-current contactor is connected with an HR output indicator lamp in series;
in the fourth loop, a coil of the KT time relay (15) is connected with a closing switch (10) of the SB4 relay in series;
in the fifth loop, a delay closed contact of a KT time relay (15) is connected with an audible and visual alarm (9) in series;
the sixth loop is connected with a power supply end of the PA electronic ammeter (1);
the seventh loop is connected with the power supply end of the PV electronic voltmeter (16);
wherein the SP direct sliding potentiometer (12) is connected into the first loop in a current-limiting manner.
3. The pure sine wave electronic voltage regulation control box of claim 2, wherein the SB1 closing switch (14) and the HG power indicator are green self-resetting lighted push-button switches, and the SB2 opening switch (11) and the HR output indicator are red self-resetting lighted push-button switches.
4. The pure sine wave electronic voltage regulation control box according to claim 1, wherein the electrical end of the pure sine wave electronic voltage regulator (17) is connected in series with the third linkage normally open contact and the fourth linkage normally open contact of the KM AC contactor respectively and then connected to the live wire end and the neutral wire end of the duplex switch.
5. A pure sine wave electronic voltage regulation control box according to claim 1 characterized in that the voltage divider measurement input terminal (3) uses Q9 connector.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202221739455.1U CN217689264U (en) | 2022-07-07 | 2022-07-07 | Pure sine wave electronic voltage regulation control box |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202221739455.1U CN217689264U (en) | 2022-07-07 | 2022-07-07 | Pure sine wave electronic voltage regulation control box |
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| Publication Number | Publication Date |
|---|---|
| CN217689264U true CN217689264U (en) | 2022-10-28 |
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| CN202221739455.1U Active CN217689264U (en) | 2022-07-07 | 2022-07-07 | Pure sine wave electronic voltage regulation control box |
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2022
- 2022-07-07 CN CN202221739455.1U patent/CN217689264U/en active Active
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