CN221224880U - Device for simulating current coil output - Google Patents

Abstract

The present disclosure relates to an apparatus for simulating a current coil output, the apparatus comprising a controller comprising: a transformer for transforming a voltage; the load circuit is connected with the transformer and used for generating secondary side current; and a selection switch for selecting a corresponding load circuit, wherein the controller is configured to output the simulated secondary side current, and wherein the load circuits are configured in groups, each group including a replaceable load resistor.

Description

Device for simulating current coil output

Technical Field

The present disclosure relates to an apparatus for simulating current coil output, and more particularly, to a test device for rapidly simulating current of a CT secondary side of a current transformer.

Background

In the field of power systems, current transformers CT are commonly used devices for measuring current. The secondary side current of the analog CT is tested to be critical to ensure the reliability and safety of the system. However, when the conventional ACB coil of the original frame circuit breaker is directly used for testing to verify the function of the electronic trip, an ACB body is required, the electronic trip (trip unit) is installed in the ACB body, and a large current, such as hundreds or even more than 10kA, is required to be input to the primary side of the ACB coil, which causes the following problems: 1) Because ACB has large volume and weight, the research and development cost is high, and a plurality of tests cannot be carried out in the same closed and narrow environment experiment box; 2) And because laboratory equipment is limited and no selectable high-current equipment can not verify a plurality of functional components such as instantaneous and short-time of the release, a large-scale current source is required to be additionally used, and the configuration is complex. In addition, omicronc test platforms have the problems of scarcity, high price, large volume and the like. Thus, there is a need for improvement and advancement in the art.

Disclosure of utility model

In view of the shortcomings of the prior art, the present disclosure relates to a test device for rapidly simulating current of a CT secondary side of a current transformer, so as to provide a release function verification platform with small volume, low cost and simple configuration, which can be rapidly built, and simultaneously provide function verification for a plurality of devices to be tested.

According to an aspect of the present disclosure, there is provided an apparatus for simulating a current coil output, the apparatus comprising a controller comprising: a transformer for transforming a voltage; the load circuit is connected with the transformer and used for generating secondary side current; and a selection switch for selecting a corresponding load circuit, wherein the controller is configured to output the simulated secondary side current, and wherein the load circuits are configured in groups, each group including a replaceable load resistor.

According to an embodiment of the present disclosure, the apparatus further comprises a mounting base, a plurality of brackets are provided above the mounting base, a plurality of devices under test are mounted on the plurality of brackets, and wherein the mounting base is connected to the controller by a cable.

According to an embodiment of the present disclosure, the controller further includes an action indicator connected with the device under test for indicating an action state of the device under test; a controller power supply providing a plurality of power modes for powering the controller; and the switch power supply is connected with the transformer and provides a plurality of power supply modes for supplying power to the device to be tested.

According to embodiments of the present disclosure, the controller power supply provides two power modes, 24V or 20V, and the switching power supply provides two power modes, 24V or 20V.

According to an embodiment of the present disclosure, the controller further comprises a line switch comprising a first phase line switch, a second phase line switch, a third phase line switch, a neutral line switch and a ground line switch for controlling the current provided by each line, wherein the selection of the selection switch for selecting the corresponding load circuit cooperates with the selection of the line switch for satisfying different current requirements.

According to an embodiment of the present disclosure, the replaceable load resistor is configured as a pluggable load resistor.

According to embodiments of the present disclosure, the device is configured for functional verification within various environmental test boxes.

According to an embodiment of the present disclosure, the apparatus is configured to be capable of performing functional verification on a plurality of devices under test simultaneously.

According to embodiments of the present disclosure, the device under test may be an electronic trip.

According to the embodiment of the disclosure, a test device for rapidly simulating CT secondary side current is provided, the external power supply state and the iron core coil power supply state of a release can be simulated, various gear currents can be selected, and a plurality of devices to be tested (e.g. the release) can be verified at the same time. The device has the advantages of small volume, quick connection, quick establishment of a release function verification platform and the like. In addition, the action indicator is provided, so that the tripping state of the tripping device can be effectively observed. Provided with a pluggable load circuit, can cover more current ranges.

Drawings

Aspects, features, and advantages of the present disclosure will become more apparent and more readily appreciated from the following description of the embodiments, taken in conjunction with the accompanying drawings, in which:

fig. 1 shows a schematic structural diagram according to the utility model;

FIG. 2 shows a functional block diagram according to the present utility model; and

Fig. 3 shows a schematic circuit configuration according to the present utility model.

Detailed Description

The present disclosure will be described in detail below with reference to exemplary embodiments thereof. However, the present disclosure is not limited to the embodiments described herein, which may be embodied in many different forms. The described embodiments are intended only to provide a thorough and complete understanding of the present disclosure and to fully convey the concept of the present disclosure to those skilled in the art. Features of the various embodiments described may be combined with or substituted for one another, unless expressly excluded or excluded depending on the context.

In the novel embodiment of this implementation, unless explicitly stated otherwise, "connected" and "connected" do not mean "directly connected" or "directly contacted" but only require electrical communication. Furthermore, the terms "first," "second," and the like herein are used for descriptive and distinguishing purposes only and do not denote any order or priority, but rather are not to be construed as indicating or implying a relative importance of the respective components, nor are they intended to represent whether the values of the parameters described are the same or different.

Fig. 1 shows a schematic structural diagram according to the utility model.

As shown in fig. 1, according to one embodiment of the present disclosure, a test apparatus includes a controller 1a and a mounting base 1b.

The panel of the controller 1a is provided with a controller power switch to provide a plurality of power supply modes. According to one embodiment of the present disclosure, a voltage 1 switch and a voltage 2 switch providing two voltage (such as voltage 1, voltage 2) selections are provided on the panel of the controller 1a. In addition, the panel of the controller is also provided with a controller power supply indicator, a voltage 1 indicator and a voltage 2 indicator which correspond to the controller power supply switch, the voltage 1 switch and the voltage 2 switch so as to intuitively indicate whether the corresponding switch is selected. According to one embodiment of the present disclosure, the controller power supply may provide 24V or 20V voltage.

A plurality of sets of stations (e.g., station 1 … … station N) may be provided on the controller panel to test a plurality of devices under test (also referred to as test articles). Each group of stations can be connected with one device to be tested to perform function verification of the device to be tested. Each group of stations is provided with a line switch, namely a phase line 1 switch (L1 switch), a phase line 2 switch (L2 switch), a phase line 3 switch (L3 switch), a neutral line switch (N switch) and a ground line switch (G switch), so as to control the current provided by each line, and the L1, L2, L3 and N, G switches are mutually matched for use so as to be selected by a tester. Each set of stations is provided with a switch (which may be referred to as a power switch, a switching power switch) for additionally powering the device to be tested. According to one embodiment of the present disclosure, each group of stations is provided with power switches, such as a switching power supply 1 switch and a switching voltage 2 switch. According to one embodiment of the present disclosure, the power switch is configured to provide both 24V or 20V power modes, i.e., both 24V switch and 20V switch. In addition, each group of stations is provided with a multi-gear selection switch for providing multiple current gear selections. According to one embodiment of the present disclosure, the current gear selection switch may be provided in the form of a knob, or may be provided in other forms to implement a function of selecting a current gear. In addition, each group of stations on the controller panel is provided with an action indicator which is connected with the device to be tested and used for indicating the state of the device to be tested.

According to one embodiment of the present disclosure, the device under test may be an electronic trip.

According to one embodiment of the present disclosure, the action indicator may be an action indicator light that provides real-time test feedback, the light being illuminated to indicate that the electronic trip is tripped, i.e., that the electronic trip is functioning properly. This provides a user friendly interface to facilitate viewing and verification.

According to one embodiment of the disclosure, each set of stations in the plurality of sets of stations can verify functions of the device under test without affecting each other, so that function verification of a plurality of devices under test can be performed simultaneously, and efficiency is improved.

As shown in fig. 1, the mounting base 1b (which may also be referred to as a control box base) may be connected to the controller by a cable (e.g., a quick-connect cable harness). A plurality of (such as N) brackets are provided above each set of mounting bases designed to receive a plurality of (such as N) devices under test that are placed on the mounting bases to receive secondary side current for testing. The design of the mounting base ensures that the device under test (i.e., the trip) is properly connected to the load circuit within the controller and allows a stable position to be maintained during testing. According to another embodiment of the present disclosure, the mounting base 1b (which may also be referred to as a control box base) may be configured as multiple sets (n sets). Each set may be connected to the controller by a cable (e.g., a quick connect cable harness). A plurality (such as N/N) of brackets are provided above each set of mounting bases and are designed to accommodate a plurality (such as N/N) of devices under test that are placed on the mounting bases to receive secondary side current for testing.

According to another embodiment of the present disclosure, 6 sets of stations may be provided on the controller panel to test 6 (n=6) devices under test. In each group of stations, the power switch is arranged to provide two power modes of 24V or 20V. In addition, each group of stations is provided with 6 gear selection switches, providing 6 current gear selections. That is, each group of stations can realize 2 power supply modes and 6 current gear selections. The mounting base connected with the controller through the cable can be configured into 2 sets (i.e. n=2), and 3 (i.e. N/n=3) brackets can be arranged above each set of mounting base to mount 3 devices to be tested. Each group of stations corresponds to 1 device to be tested so as to test the corresponding device to be tested. The test device can test 6 devices under test simultaneously.

According to one embodiment of the present disclosure, the test apparatus as shown in fig. 1 has the advantage of small volume, thereby having mobility and flexibility, and being capable of conveniently performing a plurality of tests in an environmental chamber simulating various test environments (e.g., high temperature, low temperature, etc.), that is, performing functional verification of a plurality of devices under test at the same time.

Fig. 2 shows a functional block diagram according to the utility model.

As shown in fig. 2, according to an embodiment of the present disclosure, the implementation of supplying power to the analog iron core coil to provide the analog secondary side current is to convert the 380V voltage of the mains supply into the 24V three-phase voltage through the three-phase isolation transformer, then select the corresponding load circuit through the multi-gear selection switch, apply the analog secondary side current to the phase line loop of the corresponding tripper, and if the tripper is tripped, the trip action indicator lights will be turned on.

According to one embodiment of the present disclosure, the load circuit includes a replaceable load resistor, which may be a pluggable load resistor, to allow for more current range selection. The tester changes different current loads according to the test requirement to adjust the required current setting, thereby realizing the characteristics of simple operation, quick configuration and low cost.

Referring back to fig. 1, according to one embodiment of the present disclosure, each set of stations is provided with a 6-gear selection switch that is operated by the tester to switch to a different 6-gear current gear. The gear 1 to the gear 6 of the selection switch correspond to the selection of the corresponding load circuit, and a tester selects different current gears according to test requirements so as to provide the simulated corresponding secondary side current for the device to be tested. In addition, through the multi-gear selection switch, a corresponding load circuit can be selected, and the load resistor arranged in the load circuit is a replaceable load resistor and can be replaced according to test requirements, so that more current range selections are provided. In this way, the simulated secondary side current range covers a wide range of test cases.

According to one embodiment of the present disclosure, the implementation of a simulated iron core coil to provide a simulated secondary side current provides a test apparatus with a simple configuration that reduces test costs.

Fig. 3 shows a schematic circuit configuration according to the present utility model.

In fig. 3, a switching power supply is connected to a three-phase transformer to provide multiple power modes for additional power to a device under test. According to one embodiment of the present disclosure, the switching power supply is configured to provide both 24V or 20V power modes to additionally power the device under test. The three-phase transformer is connected to load circuits, and there are a plurality of groups (N groups) of load circuits (only 2 groups of load circuits are shown in fig. 3, and other groups of load circuits which are the same as the connection of the 2 groups of load circuits are omitted), and each group of load circuits can be connected to one device to be tested (test article) to test its function. The apparatus may be configured to perform functional verification of a plurality of devices under test simultaneously. Optionally, the tester may replace different load resistors for each set of loads according to the test requirements, specifically, may replace one or more sets of load resistors individually to realize the requirements for different currents. Referring back to fig. 1, each set of stations has a corresponding load circuit, and the different load resistances required for one or more of the sets of stations can be replaced according to one embodiment of the present disclosure.

Referring back to the switches L1, L2, L3, N, G in fig. 1, by control of the switches, the current that each line can supply is controlled to provide the current required by the tester through co-operation. That is, in the case of selection of a gear in the multi-gear selector switch (i.e., selection of a load circuit), the current required by the tester is provided by switch selection of L1, L2, L3, N, G. Table 1 is the current conditions corresponding to L1, L2, L3, N lines of the selector switch from gear 1 to gear 6 by default. Optionally, the tester may replace different load resistors for one or more groups of load circuits according to the test requirement to form other tables, where gear 1 to gear 6 of the selection switch correspond to different current conditions in the L1, L2, L3, N, G lines.

Gear position	L1	L2	L3	N	G
						First gear	0A	0A	0A	0A	0A
Second gear	597A	597A	581A	600A	564A
						Three gear	876A	868A	856A	884A	835A
Four-gear	1383A	1362A	1346A	1385A	1313A
						Five gear	336A	323A	323A	336A	336A
Six gear	2188A	2139A	2124A	2169A	2065A

TABLE 1 line currents corresponding to Gear 1 to Gear 6 of the selector switch by default

It should be noted that for clarity and conciseness only those parts of the drawings that relate to embodiments of the utility model are shown, but those skilled in the art will appreciate that the apparatus or devices shown in the drawings may include other necessary elements.

The block diagrams of circuits, devices, apparatuses, devices, systems according to the present utility model are merely illustrative examples and are not intended to require or imply that connections, arrangements, configurations must be made in the manner shown in the block diagrams. As will be appreciated by one of skill in the art, these circuits, devices, apparatuses, devices, systems may be connected, arranged, configured in any manner so long as the desired purpose is achieved. The quantities referred to in this utility model are merely illustrative.

It will be clear to those skilled in the art that, for convenience and brevity of description, specific working procedures of the above-described systems, apparatuses and units may refer to corresponding procedures in the foregoing method embodiments, and are not repeated herein.

In the several embodiments provided in the present application, it should be understood that the disclosed system and apparatus may be implemented in other manners. For example, the apparatus embodiments described above are merely illustrative, e.g., the division of the units is merely a logical function division, and there may be additional divisions when actually implemented, e.g., multiple units or components may be combined or integrated into another system, or some features may be omitted or not performed. Alternatively, the coupling or direct coupling or communication connection shown or discussed with each other may be an indirect coupling or communication connection via some interfaces, devices or units, which may be in electrical, mechanical or other form.

The units described as separate units may or may not be physically separate, and units shown as units may or may not be physical units, may be located in one place, or may be distributed over a plurality of network units. Some or all of the units may be selected according to actual needs to achieve the purpose of the solution of this embodiment.

In addition, each functional unit in the embodiments of the present utility model may be integrated in one processing unit, or each unit may exist alone physically, or two or more units may be integrated in one unit. The integrated units may be implemented in hardware or in software functional units.

It will be appreciated by persons skilled in the art that the above-described embodiments are merely examples and that various modifications, combinations, partial combinations and substitutions may be made to the embodiments of the present disclosure according to design requirements and other factors, provided that they fall within the scope of the appended claims or their equivalents, i.e., within the scope of the claims to be protected by the present disclosure.

Claims (9)

1. An apparatus for simulating a current coil output, comprising:

A controller, the controller comprising:

a transformer for transforming a voltage;

the load circuit is connected with the transformer and used for generating secondary side current;

a selection switch for selecting a corresponding load circuit; and

Wherein the controller is configured to output an analog secondary side current, and

Wherein the load circuits are configured in groups, each group comprising a replaceable load resistor.

2. The apparatus as set forth in claim 1, further comprising:

A mounting base over which a plurality of holders are provided, a plurality of devices to be tested being mounted on the plurality of holders, and

The installation base is connected with the controller through a cable.

3. The apparatus of claim 1, wherein the controller further comprises:

the action indicator is connected with the device to be tested and used for indicating the action state of the device to be tested;

A controller power supply providing a plurality of power modes for powering the controller; and

And the switching power supply is connected with the transformer and provides a plurality of power supply modes for supplying power to the device to be tested.

4. A device according to claim 3, characterized in that:

the controller power supply provides two power supply modes of 24V or 20V; and

The switching power supply provides two power supply modes of 24V or 20V.

5. The apparatus of claim 1, wherein the controller further comprises:

A line switch including a first phase line switch, a second phase line switch, a third phase line switch, a neutral line switch, and a ground line switch for controlling a current provided by each line;

Wherein, the selection of the selection switch for selecting the corresponding load circuit is matched with the selection of the line switch, so as to meet different current demands.

6. The apparatus according to claim 1, wherein:

The replaceable load resistor is configured as a pluggable load resistor.

7. The apparatus according to claim 1, wherein:

the device is configured for functional verification within a test box simulating a variety of environments.

8. The apparatus according to claim 1, wherein:

The apparatus is configured to enable functional verification of a plurality of devices under test simultaneously.

9. The apparatus according to any one of claims 2-4, 8, characterized in that:

the device to be tested is an electronic release.