Anti-interference electricity testing device and testing method for low-voltage drawer disc

Abstract

The invention relates to the technical field of voltage sag prevention, in particular to a low-voltage drawer disc voltage sag prevention testing device and method, and the device comprises a controller which is connected with a voltage loss control module used for controlling the connection or disconnection of a circuit between a power supply and a low-voltage drawer disc to be tested, and is connected with an undervoltage control module used for simulating undervoltage; the no-voltage control module and the under-voltage control module are respectively connected with a power supply and a to-be-tested low-voltage drawer disc, and the to-be-tested drawer disc is connected with a load unit; the controller is connected with the to-be-tested low-voltage drawer disc, the no-voltage control module and the under-voltage control module. The problems that after a low-voltage drawer disc of an existing production device is put into use, no special testing device and method are used for detecting the anti-interference electricity performance of the low-voltage drawer disc, operation needs to be completely synchronous through manual switch opening and closing testing, safety risks exist, and if the anti-interference electricity performance cannot be reliably verified, serious hidden dangers exist in a continuous operation device are solved.

Description

Technical Field

[0001] The present invention relates to the technical field of anti-electrical shaking, and in particular to a low-voltage drawer anti-electrical shaking test device and a test method. Background Art

[0002] Petroleum refining and chemical industry is an industry that requires continuous operation of production equipment. Power system fluctuations can cause fluctuations in equipment operation or shutdown, which can cause great economic losses to the company or cause serious production accidents. 8PT low-voltage drawer panels are mostly used in the equipment to power the equipment. The anti-power sway function of the low-voltage drawer panel mainly relies on the restart function of the integrated protector to achieve the anti-power sway restart of the low-voltage motor. After the power system fluctuates, the restart function of the low-voltage drawer panel circuit integrated protector can be used to restart the equipment that has stopped due to power sway within the time allowed by the process conditions, thereby avoiding shutdown of the production equipment or causing safety accidents.

[0003] After the anti-electrical sway function of the low-voltage motor of the production device is put into use, it is difficult to test whether the anti-electrical sway function can be put into use reliably. To artificially simulate the electric sway phenomenon, two people are required to open and close the main circuit and control circuit switches at the same time, and they must cooperate in a consistent manner. There is a risk of electric shock when the equipment opens and closes the switches under load. If the cooperation is inconsistent, the experiment cannot be completed. There is no special test device and complete test method for the anti-electrical sway verification of the low-voltage drawer panel. If the anti-electrical sway function cannot be reliably verified, it cannot be guaranteed that the anti-electrical sway function of the low-voltage motor of the device can be put into use reliably, which will inevitably affect the stable operation of the device. Summary of the invention

[0004] The present invention proposes a low-voltage drawer anti-electrical sway test device and test method to solve the problem that after the low-voltage drawer of the existing production equipment is put into use, there is no special test device and method to detect its anti-electrical sway performance. The manual opening and closing switch test requires complete synchronization of the operation, which poses a safety risk. If the anti-electrical sway performance cannot be reliably verified, it will cause serious hidden dangers in the continuous operation of the device.

[0005] According to one aspect of the present invention, a low-voltage drawer tray anti-electrical shaking test device is provided, comprising: a controller, a voltage loss control module, an undervoltage control module and a load unit; The controller is connected to the undervoltage control module for controlling the connection or disconnection of the line between the power supply and the low-voltage drawer tray to be tested, and is connected to the undervoltage control module for simulating undervoltage; The voltage loss control module and the undervoltage control module are respectively connected to a power supply and a low-voltage drawer tray to be tested, and the drawer tray to be tested is connected to the load unit; The controller is respectively connected to the low-voltage drawer disk to be tested, the pressure loss control module and the undervoltage control module. The controller is used to control the pressure loss control module to start simulating circuit pressure loss and / or control the undervoltage control module to start simulating circuit undervoltage, and to detect whether the low-voltage drawer disk to be tested meets the test requirements under the simulated circuit pressure loss and / or circuit undervoltage conditions.

[0006] Preferably, the pressure loss control module comprises: a pressure loss contactor; The input end of the undervoltage contactor is connected to a power source via a first circuit breaker, and the output end of the undervoltage contactor is connected to the low-voltage drawer tray to be tested; The controller is connected to the voltage loss contactor.

[0007] Preferably, the undervoltage control module comprises: an undervoltage contactor and a voltage regulator; The input end of the undervoltage contactor is connected to the output end of the voltage regulator, and the input end of the voltage regulator is connected to the power supply through the second circuit breaker; The output end of the undervoltage contactor is the low-voltage drawer disk to be tested; The undervoltage contactor and the voltage regulator are connected to the controller.

[0008] Preferably, the load unit comprises: a resistor or a motor; The resistor or the motor is connected to the low-voltage drawer tray to be tested.

[0009] According to one aspect of the present invention, a low-voltage drawer tray anti-electricity shaking test method is provided, comprising: When performing pressure loss detection, the controller controls the pressure loss control module to disconnect the line between the power supply and the low-voltage drawer to be tested. After a first predetermined time, the controller controls the pressure loss control module to connect the line between the power supply and the low-voltage drawer to be tested. The controller detects whether the low-voltage drawer to be tested is started normally. If yes, the pressure loss detection of the low-voltage drawer to be tested meets the test requirements; When performing undervoltage detection, the controller controls the undervoltage control module to disconnect the line between the power supply and the low-voltage drawer disk to be tested, and controls the undervoltage control module to start, adjusts the power supply voltage to a predetermined undervoltage value, and transmits it to the low-voltage drawer disk to be tested. After a second predetermined time, the undervoltage control module is controlled to connect the line between the power supply and the low-voltage drawer disk to be tested; The controller detects whether the low-voltage drawer disk to be tested is started normally. If so, the undervoltage detection of the low-voltage drawer disk to be tested meets the test requirements.

[0010] Preferably, the method for detecting whether the low-voltage drawer tray to be tested is started normally includes: The controller determines whether the contactor in the low-voltage drawer to be tested is in the energized state, or whether the motor protector connected to the low-voltage drawer to be tested is energized, or whether the integrated protector in the low-voltage drawer to be tested is energized. If so, the low-voltage drawer to be tested has been started normally.

[0011] Preferably, it also includes: When performing pressure loss detection and / or undervoltage detection, the controller obtains the recovery start-up time of the low-voltage drawer disk to be tested after the pressure loss and undervoltage end, and determines whether the recovery start-up time meets the predetermined requirements. If yes, the low-voltage drawer disk to be tested meets the test requirements.

[0012] Preferably, the value range of the first predetermined time and the second predetermined time is: 2~4s.

[0013] The present invention has at least the following beneficial effects: The present invention proposes a low-voltage drawer panel anti-electrical shaking test device and test method. By setting a loss of voltage control module, an undervoltage control module and a load unit, it can accurately and truly simulate the loss of voltage and undervoltage conditions during electric shaking, and detect the performance of the low-voltage drawer panel during electric shaking, thereby ensuring that the anti-electrical shaking function of the motor can be reliably put into use. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] The accompanying drawings herein are incorporated into and constitute a part of the specification. These drawings illustrate embodiments consistent with the present invention and, together with the specification, are used to explain the technical solutions of the present invention.

[0015] Figure 1 A circuit diagram showing a low voltage drawer tray anti-electrical shaking test device according to an embodiment of the present invention; Figure 2 A wiring diagram of a low-voltage drawer tray anti-electrical shaking test device according to an embodiment of the present invention is shown; Figure 3 A PLC control logic diagram of a low-voltage drawer tray anti-electrical shaking test device according to an embodiment of the present invention is shown. Implementation

[0016] Various exemplary embodiments, features and aspects of the present invention will be described in detail below with reference to the accompanying drawings. The same reference numerals in the accompanying drawings represent elements with the same or similar functions. Although various aspects of the embodiments are shown in the accompanying drawings, the drawings are not necessarily drawn to scale unless otherwise specified.

[0017] The word “exemplary” is used exclusively herein to mean “serving as an example, example, or illustration.” Any embodiment described herein as “exemplary” is not necessarily to be construed as preferred or advantageous over other embodiments.

[0018] The term "and / or" herein is only a description of the association relationship of the associated objects, indicating that there may be three relationships. For example, A and / or B can represent: A exists alone, A and B exist at the same time, and B exists alone. In addition, the term "at least one" herein represents any combination of at least two of any one or more of a plurality of. For example, including at least one of A, B, and C can represent including any one or more elements selected from the set consisting of A, B, and C.

[0019] In addition, in order to better illustrate the present invention, numerous specific details are provided in the following specific embodiments. It should be understood by those skilled in the art that the present invention can be implemented without certain specific details. In some examples, methods, means, components and circuits well known to those skilled in the art are not described in detail in order to highlight the subject matter of the present invention.

[0020] Figure 1 A circuit diagram showing a low voltage drawer tray anti-electrical shaking test device according to an embodiment of the present invention; Figure 2 A wiring diagram of a low-voltage drawer tray anti-electrical shaking test device according to an embodiment of the present invention is shown; Figure 3 The PLC control logic diagram of the low voltage drawer anti-electricity shaking test device according to the embodiment of the present invention is shown. Figure 1-3 As shown, a low-voltage drawer tray anti-electrical shaking test device includes: a controller, a loss of voltage control module, an undervoltage control module and a load unit; the controller is connected to the loss of voltage control module for controlling the connection or disconnection of the line between the power supply and the low-voltage drawer tray to be tested, and is connected to the undervoltage control module for simulating undervoltage; the loss of voltage control module and the undervoltage control module are respectively connected to the power supply and the low-voltage drawer tray to be tested, and the drawer tray to be tested is connected to the load unit; the controller is respectively connected to the low-voltage drawer tray to be tested, the loss of voltage control module and the undervoltage control module, and the controller is used to control the loss of voltage control module to start simulating circuit loss of voltage and / or control the undervoltage control module to start simulating circuit undervoltage, and is used to detect whether the low-voltage drawer tray to be tested meets the test requirements under the simulated circuit loss of voltage and / or circuit undervoltage conditions.

[0021] In the embodiment of the present invention, the controller is a PLC controller, the low-voltage drawer to be tested is an 8PT low-voltage drawer, the pressure loss control module and the undervoltage control module are connected to the internal circuit of the low-voltage drawer, and the PLC controller is connected to the low-voltage drawer control circuit. At startup, the controller controls the pressure loss control module to start the line between the power supply and the low-voltage drawer to be tested, and the power supply, the low-voltage drawer and the load unit form a loop after being energized, and the low-voltage drawer and the load unit operate normally.

[0022] When performing the pressure loss detection, the controller controls the disconnection of the line between the power supply and the low-voltage drawer tray to be tested through the pressure loss control module. After the first predetermined time, the controller controls the connection of the line between the power supply and the low-voltage drawer tray to be tested through the pressure loss control module, thereby simulating the pressure loss process of the low-voltage drawer tray. The controller detects whether the low-voltage drawer tray to be tested can start normally within the predetermined time after the pressure loss and power restoration. If yes, the pressure loss detection of the low-voltage drawer tray to be tested meets the test requirements.

[0023] Before the undervoltage detection, if the low-voltage drawer tray to be tested and the load unit are not powered on at this time, the controller first controls the line connection between the power supply and the low-voltage drawer tray to be tested through the pressure loss control module to achieve full voltage startup and normal power supply. When the undervoltage detection is performed, the controller controls the disconnection of the line between the power supply and the low-voltage drawer tray to be tested through the pressure loss control module. At the same time or after a predetermined time, the controller controls the pressure loss control module to start, adjusts the power supply voltage to a predetermined undervoltage value and transmits it to the low-voltage drawer tray to be tested. After a second predetermined time, the undervoltage control module is controlled to be turned off. At the same time or after a predetermined time, the controller controls the line connection between the power supply and the low-voltage drawer tray to be tested through the pressure loss control module, thereby simulating the undervoltage process of the low-voltage drawer tray. The controller detects whether the low-voltage drawer tray to be tested can start normally within the predetermined time after undervoltage and voltage recovery. If yes, the undervoltage detection of the low-voltage drawer tray to be tested meets the test requirements.

[0024] In the present invention, the undervoltage control module includes: an undervoltage contactor; the input end of the undervoltage contactor is connected to the power supply through a first circuit breaker, and the output end of the undervoltage contactor is connected to the low-voltage drawer to be tested; the controller is connected to the undervoltage contactor.

[0025] In an embodiment of the present invention, the pressure loss control module further includes: a pressure loss relay M0 and a pressure loss time relay T0. When performing pressure loss detection, the controller controls the pressure loss contactor KM1 to disconnect through the pressure loss relay M0, thereby disconnecting the line between the power supply and the low-voltage drawer to be tested. The pressure loss time relay T0 is used for timing. After a first predetermined time, the controller controls the pressure loss contactor KM1 to close, so that the line between the power supply and the low-voltage drawer to be tested is connected, thereby simulating the pressure loss process of the low-voltage drawer.

[0026] In the present invention, the undervoltage control module includes: an undervoltage contactor and a voltage regulator; the input end of the undervoltage contactor is connected to the output end of the voltage regulator, and the input end of the voltage regulator is connected to the power supply through a second circuit breaker; the output end of the undervoltage contactor is connected to the low-voltage drawer to be tested; the undervoltage contactor and the voltage regulator are connected to the controller.

[0027] In an embodiment of the present invention, the undervoltage control module also includes: an undervoltage relay M1, a full-voltage to undervoltage relay M2, an undervoltage action relay M3, an undervoltage to full-voltage relay M4, a full-voltage to undervoltage time relay T1, and an undervoltage to full-voltage time relay T2.

[0028] Before the undervoltage detection, if the low-voltage drawer and load unit to be tested are not powered on, the controller first controls KM1 to close through the undervoltage relay M1, so that the line between the power supply and the low-voltage drawer to be tested is connected and full voltage is supplied. When performing undervoltage detection, the controller controls KM1 to disconnect through the undervoltage relay M1, cutting off the line between the power supply and the low-voltage drawer disk to be tested. At the same time or after the full-voltage to undervoltage time relay T1 has started timing for a preset time, the controller controls the undervoltage contactor KM2 to close through the full-voltage to undervoltage relay M2, connecting the line between the power supply and the low-voltage drawer disk to be tested, and controls the voltage regulator to start adjusting the power supply voltage to a preset undervoltage value and then transmitting it to the low-voltage drawer disk to be tested; after KM2 is closed, the undervoltage to full-voltage time relay T2 is energized and starts timing through the undervoltage to full-voltage relay M4. After a second preset time, the controller controls KM1 to close through the undervoltage relay M1, connecting the line between the power supply and the low-voltage drawer disk to be tested, so that the low-voltage drawer disk to be tested is restored to full voltage power supply, thereby simulating the undervoltage process of the low-voltage drawer disk.

[0029] In the present invention, the load unit comprises: a resistor or a motor; the resistor or the motor is connected to the low-voltage drawer tray to be tested.

[0030] When conducting undervoltage detection, during the test, a small motor M or a resistor can be used as the load during the test to replace the motor in the original production device to prevent damage to the motor during the test. Among them, the resistor model parameters can be selected as GH300W, 1KΩ. Connect the resistor or motor to the low-voltage drawer to be tested for testing.

[0031] The present invention also proposes a low-voltage drawer tray anti-electrical shaking test method, comprising: when performing a loss of voltage detection, the controller controls the loss of voltage control module to disconnect the line between the power supply and the low-voltage drawer tray to be tested, and after a first predetermined time, the controller controls the loss of voltage control module to connect the line between the power supply and the low-voltage drawer tray to be tested; the controller detects whether the low-voltage drawer tray to be tested is started normally, and if so, the loss of voltage detection of the low-voltage drawer tray to be tested meets the test requirements; when performing an undervoltage detection, the controller controls the loss of voltage control module to disconnect the line between the power supply and the low-voltage drawer tray to be tested, and at the same time controls the undervoltage control module to start, adjusts the power supply voltage to a predetermined undervoltage value and then transmits it to the low-voltage drawer tray to be tested, and after a second predetermined time, controls the loss of voltage control module to connect the line between the power supply and the low-voltage drawer tray to be tested; the controller detects whether the low-voltage drawer tray to be tested is started normally, and if so, the undervoltage detection of the low-voltage drawer tray to be tested meets the test requirements.

[0032] In the embodiment of the present invention, in the initial state, the controller controls KM1 to close, connects the line between the power supply and the low-voltage drawer tray to be tested, and supplies power normally. When performing a pressure loss detection, the controller controls KM1 to open, and after a first predetermined time, the controller controls KM1 to close; the controller detects whether the low-voltage drawer tray to be tested is started normally, and if so, the low-voltage drawer tray to be tested meets the pressure loss test requirements.

[0033] When performing undervoltage detection, KM1 is initially in a closed state; the controller controls KM1 to open and KM2 to close, and at the same time controls the voltage regulator to start, adjusts the power supply voltage to a predetermined undervoltage value, and then transmits it to the low-voltage drawer disk to be tested. After a second predetermined time, the controller controls KM1 to close and KM2 to open; the controller detects whether the low-voltage drawer disk to be tested starts normally. If so, the low-voltage drawer disk to be tested meets the undervoltage test requirements.

[0034] In the present invention, a method for detecting whether a low-voltage drawer disk to be tested is started normally comprises: a controller determines whether a contactor in the low-voltage drawer disk to be tested is in an energized state, or determines whether a motor protector connected to the low-voltage drawer disk to be tested is energized, or determines whether an integrated protector in the low-voltage drawer disk to be tested is energized. If yes, the low-voltage drawer disk to be tested has been started normally.

[0035] In the embodiment of the present invention, there are three ways to determine whether the low-voltage drawer to be tested can start normally after power is restored after voltage loss or undervoltage. The first is to detect whether the contactor KM in the low-voltage drawer to be tested is normally attracted, the second is to determine whether the motor protector BDM connected between the load unit and the low-voltage drawer to be tested is energized, and the third is to determine whether the integrated protector (integrated protection device) connected to the low-voltage drawer to be tested is energized. If yes, it means that the anti-electricity shaking test result of the low-voltage drawer to be tested meets the test requirements.

[0036] The present invention also includes: when performing pressure loss detection and / or undervoltage detection, the controller obtains the recovery start-up time of the low-voltage drawer disk to be tested after the pressure loss and undervoltage end, and determines whether the recovery start-up time meets the predetermined requirements. If so, the low-voltage drawer disk to be tested meets the test requirements.

[0037] In the embodiment of the present invention, the controller determines that when power is restored after voltage loss or undervoltage, the sum of the self-start time and the undervoltage or voltage loss time of the low-voltage drawer to be tested needs to be less than the power-off time allowed by the process conditions of the equipment, and the restart operation must be achieved within the allowable power-off time. If the low-voltage drawer to be tested does not self-start within the allowable power-off time, the test requirement is not met.

[0038] In the present invention, the value range of the first predetermined time and the second predetermined time is: 2~4s.

[0039] In an embodiment of the present invention, the low-voltage drawer panel anti-electrical shaking test device also includes a digital voltmeter, a current transformer and a test bench, which are used to detect the current and voltage when the equipment is running; the PLC controller realizes the start and stop control of the low-voltage drawer panel circuit, and simulates electric shaking phenomena such as undervoltage and loss of voltage, to detect whether the low-voltage drawer panel anti-electrical shaking function can be reliably put into use.

[0040] The low-voltage drawer anti-sway test device is suitable for the anti-sway function test of the same type of low-voltage drawer in the power distribution station. The low-voltage drawer anti-sway test device is a mobile trolley type. The low-voltage drawer anti-sway test device is 80CM long, 60CM wide, and 101CM high, and is equipped with four mobile rollers on the lower side. According to the main circuit and control circuit logic design, the low-voltage drawer anti-sway test device is configured with a start and stop control circuit and a simulated power system undervoltage and loss circuit.

[0041] like Figure 3 The figure shows the PLC control logic diagram. The PLC control process includes full voltage start-up, voltage loss to full voltage start-up and undervoltage to full voltage start-up control process. The specific PLC control process is as follows: Full voltage start: Press button X000 (full voltage self-start SB1) and the normally open contact closes → the circuit passes through the normally closed contact of Y001 (undervoltage power supply KM2) → the normally closed contact of X001 (undervoltage button SB2) → the normally closed contact of M1 (undervoltage relay) → the normally closed contact of X004 (stop button SB4) → the coil of KM1 of Y000 (full voltage power supply) is energized, and at the same time, the normally open contact of Y000 (full voltage power supply KM1) is closed to realize self-locking. The KM1 contactor is energized and attracted to supply full voltage to the drawer tray. Press the start button of the drawer tray circuit SB6 → the contactor KM in the drawer tray is energized, and the contactor KM attracts → the load 3M operates normally.

[0042] Start from loss of pressure to full pressure: Press X001 (loss of pressure button SB2) and the normally open contact is closed → the circuit passes through the normally closed contact of T0 (loss of pressure time relay) → the normally closed contact of X004 (stop button SB4) → M0 (loss of pressure relay) is energized, T0 (loss of pressure time relay) is energized, and Y004 (loss of pressure timing) is energized to start the loss of pressure timing. After 3s, the normally closed contact of T0 (loss of pressure time relay) is disconnected → M0, T0, Y004 lose power, and the Y004 loss of pressure timing ends.

[0043] The normally open contact of T0 (pressure loss time relay) is closed → the circuit passes through the normally closed contact of Y001 (undervoltage power supply KM2) → the normally closed contact of X001 (undervoltage button SB2) → the normally closed contact of M1 (undervoltage relay) → the normally closed contact of X004 (stop button SB4) → the coil of Y000 (full voltage power supply) KM1 is energized, and at the same time, the normally open contact of Y000 (full voltage power supply) KM1 is closed to achieve self-locking. The KM1 contactor is energized and attracted, and the three-phase power supply output is the full voltage power supply for the drawer tray. The restart contact of the drawer tray circuit comprehensive protection BDM (C11, C12) is closed → the contactor KM in the drawer tray is energized, and the contactor KM is attracted → the load 3M operates normally.

[0044] Undervoltage to full voltage start: Load 3M operates normally → Press X002 (undervoltage button SB3) and the normally open contact closes → The circuit passes through the normally closed contact of M3 (undervoltage action relay) - the normally closed contact of X004 (stop button SB4) → M1 (undervoltage relay) is energized, and the normally open contact of M1 closes to control the circuit to self-lock.

[0045] M1 normally closed contact is disconnected → Y000 (full voltage power supply) KM1 loses power, Y000 normally closed contact is closed → M2 (full voltage to undervoltage relay) is energized, → T1 (full voltage to undervoltage time relay) is energized, M2 (full voltage to undervoltage relay) normally open contact is closed to achieve self-locking. After a time delay, T1 (full voltage to undervoltage time relay) normally open contact is closed → Y001 (undervoltage power supply) KM2 coil is energized, KM2 contactor is closed, and load 3M works in a low voltage state.

[0046] The KM contactor in the low-voltage drawer is disconnected due to undervoltage, that is, the X003 (motor running signal) contact is closed → Y001 (undervoltage power supply) KM2 normally open contact is closed → the circuit passes through the Y000 normally closed contact → X004 (stop button SB4) normally closed contact → M3 (undervoltage action relay) is energized, Y010 (undervoltage timing relay) is energized to start timing, and the M3 (undervoltage action relay) normally open contact is closed to achieve self-locking. Y001 (undervoltage power supply) KM2 contact is closed → M4 (undervoltage to full voltage relay) is energized, T2 (undervoltage to full voltage time relay) is energized, and the M4 normally open contact is closed to achieve self-locking.

[0047] The delayed normally open contact of T2 (undervoltage to full voltage time relay) is closed → the circuit passes through the normally closed contact of KM2 of Y001 (undervoltage power supply) → the normally closed contact of X001 (undervoltage button SB2) → the normally closed contact of M1 (undervoltage relay) → the normally closed contact of X004 (stop button SB4) → the coil of KM1 of Y000 (full voltage power supply) is energized, and at the same time, the normally open contact of KM1 of Y000 (full voltage power supply) is closed to realize self-locking. The contactor of KM1 is energized and attracted, and the three-phase power supply output is the full voltage power supply for the drawer. The contact of the drawer circuit comprehensive protection BDM (C11, C12) is closed → the contactor KM in the drawer is energized, and the contactor KM is attracted → the load 3M operates normally.

[0048] Y000 (full voltage power supply) KM1 normally closed contact is disconnected, M3, M4, T2, and Y010 lose power, and the Y010 undervoltage timing ends.

[0049] Timer reset: X004 (stop button SB4) normally open contact closes → Y014 (timer reset) output, resetting Y004 undervoltage timer and Y010 undervoltage timer.

[0050] It can be understood that the above-mentioned various embodiments mentioned in the present invention can be combined with each other to form a combined embodiment without violating the principle logic. Due to space limitations, the present invention will not go into details.

[0051] Those skilled in the art will appreciate that, in the above method of specific implementation, the order in which the steps are written does not imply a strict execution order and does not constitute any limitation on the implementation process. The specific execution order of the steps should be determined by their functions and possible internal logic.

[0052] The present invention provides a device capable of simulating the electric shaking phenomenon of the power system, and is used for the anti-electrical shaking technical measures of important machine pumps in the production device to detect whether the anti-electrical shaking function of the anti-electrical shaking control circuit of the low-voltage drawer is reliably put into use. The device should have the function of simulating the electric shaking phenomenon, be able to customize the duration of the electric shaking action, be mobile, easy to operate, be able to truly simulate the electric shaking phenomenon, and be able to detect whether the anti-electrical shaking function of the same type of control circuit of the distribution station is reliably put into use, providing a strong guarantee for the continuous, safe and stable operation of the production device.

[0053] The embodiments of the present invention have been described above, and the above description is exemplary, not exhaustive, and is not limited to the disclosed embodiments. Many modifications and variations will be apparent to those of ordinary skill in the art without departing from the scope and spirit of the described embodiments. The selection of terms used herein is intended to best explain the principles of the embodiments, practical applications, or technical improvements in the market, or to enable other persons of ordinary skill in the art to understand the embodiments disclosed herein.

Claims

1. A low voltage drawer anti-electricity shaking test device, characterized in that: include: Controller, loss of voltage control module, undervoltage control module and load unit; The controller is connected to the undervoltage control module for controlling the connection or disconnection of the line between the power supply and the low-voltage drawer tray to be tested, and is connected to the undervoltage control module for simulating undervoltage; The voltage loss control module and the undervoltage control module are respectively connected to a power supply and a low-voltage drawer tray to be tested, and the drawer tray to be tested is connected to the load unit; The controller is respectively connected to the low-voltage drawer disk to be tested, the pressure loss control module and the undervoltage control module. The controller is used to control the pressure loss control module to start simulating circuit pressure loss and / or control the undervoltage control module to start simulating circuit undervoltage, and to detect whether the low-voltage drawer disk to be tested meets the test requirements under the simulated circuit pressure loss and / or circuit undervoltage conditions.

2. The low-voltage drawer anti-electricity shaking test device according to claim 1 is characterized in that: The pressure loss control module includes: a pressure loss contactor; The input end of the undervoltage contactor is connected to a power source via a first circuit breaker, and the output end of the undervoltage contactor is connected to the low-voltage drawer tray to be tested; The controller is connected to the voltage loss contactor.

3. The low voltage drawer anti-electricity shaking test device according to claim 1 is characterized in that: The undervoltage control module includes: an undervoltage contactor and a voltage regulator; The input end of the undervoltage contactor is connected to the output end of the voltage regulator, and the input end of the voltage regulator is connected to the power supply through the second circuit breaker; The output end of the undervoltage contactor is the low-voltage drawer disk to be tested; The undervoltage contactor and the voltage regulator are connected to the controller.

4. The low-voltage drawer anti-electrical shaking test device according to any one of claims 1 to 3, characterized in that: The load unit includes: a resistor or a motor; The resistor or the motor is connected to the low-voltage drawer tray to be tested.

5. A low voltage drawer tray anti-electricity shaking test method, characterized in that: include: When performing pressure loss detection, the controller controls the pressure loss control module to disconnect the line between the power supply and the low-voltage drawer to be tested. After a first predetermined time, the controller controls the pressure loss control module to connect the line between the power supply and the low-voltage drawer to be tested. The controller detects whether the low-voltage drawer to be tested is started normally. If yes, the pressure loss detection of the low-voltage drawer to be tested meets the test requirements; When performing undervoltage detection, the controller controls the undervoltage control module to disconnect the line between the power supply and the low-voltage drawer disk to be tested, and controls the undervoltage control module to start, adjusts the power supply voltage to a predetermined undervoltage value, and transmits it to the low-voltage drawer disk to be tested. After a second predetermined time, the undervoltage control module is controlled to connect the line between the power supply and the low-voltage drawer disk to be tested; The controller detects whether the low-voltage drawer disk to be tested is started normally. If so, the undervoltage detection of the low-voltage drawer disk to be tested meets the test requirements.

6. The low voltage drawer anti-electricity shaking test method according to claim 5 is characterized in that: The method for detecting whether the low-voltage drawer tray to be tested is started normally includes: The controller determines whether the contactor in the low-voltage drawer to be tested is in the energized state, or whether the motor protector connected to the low-voltage drawer to be tested is energized, or whether the integrated protector in the low-voltage drawer to be tested is energized. If so, the low-voltage drawer to be tested has been started normally.

7. The low voltage drawer anti-electricity shaking test method according to claim 5 is characterized in that: Also includes: When performing pressure loss detection and / or undervoltage detection, the controller obtains the recovery start-up time of the low-voltage drawer disk to be tested after the pressure loss and undervoltage end, and determines whether the recovery start-up time meets the predetermined requirements. If yes, the low-voltage drawer disk to be tested meets the test requirements.

8. The low-voltage drawer anti-electricity shaking test method according to any one of claims 5 to 7, characterized in that: The value range of the first scheduled time and the second scheduled time is: 2~4s.

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