Testing device for electrical fireproof current-limiting protector

Abstract

The utility model relates to a testing device used for an electrical fireproof current-limiting protector. The testing device comprises a box body, a KM1 AC contactor, an ASCP instrument, a QF1 air circuit breaker, a QF2 air circuit breaker, a QF3 air circuit breaker and a QF4 air circuit breaker. The top surface of the box body is provided with a QF1 air circuit breaker, a QF2 air circuit breaker, a three-jack socket, a QF3 air circuit breaker and a QF4 air circuit breaker which are arranged side by side, the top surface of the box body is also provided with an ASCP instrument, and one corner of the top surface of the box body is provided with an S1 short circuit test button; a KM1 alternating current contactor is arranged in the box body; the outer side wall of the box body is provided with an auxiliary power supply port, a voltage port and a current port; and a wiring port of the ASCP instrument is electrically connected with the testing device through a probe. According to the utility model, the contactor used for short circuit is arranged in the box body, thereby preventing short-circuit tripping caused by product failure, and greatly improving safety and reliability.

Description

Technical Field

[0001] The utility model relates to the technical field of current measurement, in particular to a testing device for an electrical fire-proof current-limiting protector. Background Art

[0002] In recent years, with economic development and increased energy consumption, electrical fires have become commonplace due to a lack of awareness of electrical safety among users and improper use, management, or maintenance of electrical equipment. The incidence of electrical fires remains high, causing significant economic losses and, in severe cases, life-threatening situations. As a product for preventing electrical fires, the Electrical Fire Current Limiter (ASCP) provides microsecond-level current limiting protection against electrical short circuits. This occurs long before the current generated by a short circuit reaches the short-circuit current, preventing continuous arcing caused by short circuits from igniting combustible materials and causing fire accidents.

[0003] During the ASCP product production phase, a series of tests are required for the entire device, including short-circuit protection, overload protection, overvoltage and undervoltage protection, and other functions. The numerous test items require complex wiring between the ASCP meter and the test equipment, requiring rewiring for each test. Testing different functions also requires repeated wiring and instrument changes. The tedious and complex testing process is difficult for production personnel unfamiliar with the product, resulting in slow testing, low efficiency, and low yield. Furthermore, short-circuit testing is dangerous. Due to its unique testing requirements, it cannot be tested simultaneously with other functions and requires a separate test environment. Improper operation can easily damage the instrumentation, cause a power outage on the entire circuit, and even endanger personnel. Summary of the Invention

[0004] The purpose of the utility model is to overcome the above-mentioned shortcomings and provide a test device for electrical fire-proof current-limiting protectors. The wiring is fixed inside the device, and all test items of the ASCP instrument are taken into account. During testing, there is no need for personnel to rewire and repeatedly change wires. Short-circuit testing can also be completed using the device without having to be tested separately from other items. The operation is simple, flexible and convenient, and the test efficiency and safety and reliability are improved.

[0005] The purpose of this utility model is achieved in this way:

[0006] A test device for an electrical fire-proof current-limiting protector comprises a housing, a KM1 AC contactor, an ASCP instrument, a QF1 air circuit breaker, a QF2 air circuit breaker, a QF3 air circuit breaker, and a QF4 air circuit breaker. The top surface of the housing is provided with the QF1 air circuit breaker, QF2 air circuit breaker, a three-hole socket, a QF3 air circuit breaker, and a QF4 air circuit breaker arranged side by side. The top surface of the housing is also provided with an ASCP instrument, and an S1 short-circuit test button is provided at a corner of the top surface of the housing. A KM1 AC contactor is provided inside the housing. An auxiliary power port, a voltage port, and a current port are provided on the outer wall of the housing. The wiring port of the ASCP instrument is electrically connected to the test device via a probe.

[0007] The QF1 air circuit breaker is a mains debugging circuit breaker. The input end of the QF1 air circuit breaker is connected to the auxiliary power port, and the output end of the QF1 air circuit breaker is connected to the power port of the ASCP instrument for controlling the access to the mains; at the same time, the output end of the QF1 air circuit breaker is connected to the S1 short-circuit test button and the coil of the KM1 AC contactor. The S1 short-circuit test button controls the power supply of the KM1 AC contactor for short-circuit testing; the QF2 air circuit breaker is a signal source debugging circuit breaker. The input end of the QF2 air circuit breaker is connected to the voltage port and the current port respectively. The output end of the QF2 air circuit breaker is connected to the Lin, Nin, and Lout ports of the ASCP instrument in sequence for controlling the access signal source; the QF3 air circuit breaker is a load debugging circuit breaker, and the input end of the QF3 air circuit breaker is connected to the Lout and Nout ports of the ASCP instrument; the QF4 air circuit breaker is a short-circuit debugging circuit breaker, and the input end of the QF4 air circuit breaker is connected to the Lout and Nout ports of the ASCP instrument 10, and the output end of the QF4 air circuit breaker is connected to the normally open contact of the KM1 AC contactor, which is used to simulate an external load short circuit.

[0008] Furthermore, an indicator light is provided on the top surface of the box, the output end of the QF4 air circuit breaker is connected to the indicator light, the indicator light and the KM1 AC contactor are connected in parallel, and the indicator light is used to indicate whether the ASCP instrument has completed short-circuit protection current limiting.

[0009] Furthermore, the auxiliary power port includes an auxiliary power port L and an auxiliary power port N, the voltage port includes a voltage port Ua and a voltage port Un, and the current port includes a current port Ia* and a current port Ia, wherein the voltage port Ua and the current port Ia* are short-circuited.

[0010] Furthermore, the output end of the QF3 air circuit breaker is connected to a three-hole socket, and the three-hole socket can be connected to an external load, which is a resistive load with a rated working voltage of 220V, 50Hz, and 3A~6A, and is used to input the load for short-circuit testing.

[0011] Furthermore, the ASCP instrument is fixed to the top surface of the box through a buckle.

[0012] Compared with the prior art, the beneficial effects of the present invention are:

[0013] The utility model provides a test device for electrical fire-proof current-limiting protectors. The structure is simple, a contactor for short circuit is placed inside a box, and a short circuit is performed by a button, which prevents staff from directly contacting the short-circuited part, and an air circuit breaker is placed at the mains power inlet to prevent product failure from causing short circuit and power outage, thereby greatly improving safety and reliability; the utility model is easy to operate, and can be completed by controlling only the circuit breaker, button and signal source. All test items can be tested with the device, and manual wiring and line replacement are not required. Testers who are not familiar with the product can also use it easily, which reduces labor costs and improves test efficiency; the size of the test device of the utility model can be flexibly adjusted, and it can be applied to small-volume application sites, is easy to carry and move, and has no fixed test location. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] Figure 1 It is a structural diagram of the present utility model.

[0015] Figure 2 This is a schematic diagram of the side wall port of the box body of the present invention.

[0016] Figure 3 This is a circuit connection diagram of the utility model.

[0017] in:

[0018] Box 1, QF1 air circuit breaker 2, QF2 air circuit breaker 3, three-hole socket 4, QF3 air circuit breaker 5, QF4 air circuit breaker 6, indicator light 7, S1 short-circuit test button 8, KM1 AC contactor 9, ASCP meter 10, auxiliary power port 11, voltage port 12, current port 13. DETAILED DESCRIPTION

[0019] To better understand the technical solution of the present invention, the following detailed description is provided with reference to the relevant illustrations. It should be understood that the following specific embodiments are not intended to limit the specific implementation of the technical solution of the present invention; they are merely examples of possible implementations of the technical solution of the present invention. It should be noted that the description herein of the positional relationships of the various components, such as component A being located above component B, is based on the relative positions of the components in the illustrations and is not intended to limit the actual positional relationships of the components. Example 1

[0020] See also Figure 1-Figure 3 , Figure 1A schematic structural diagram of the present invention is provided. As shown in the figure, the present invention relates to a test device for an electrical fire-proof current-limiting protector, comprising a housing 1, a KM1 AC contactor 9, an ASCP meter 10, and four air circuit breakers: a QF1 air circuit breaker 2, a QF2 air circuit breaker 3, a QF3 air circuit breaker 5, and a QF4 air circuit breaker 6. The top surface of the housing 1 is provided with the QF1 air circuit breaker 2, the QF2 air circuit breaker 3, a three-hole socket 4, the QF3 air circuit breaker 5, and the QF4 air circuit breaker 6, arranged side by side. The front side of the QF2 air circuit breaker 3 is provided with an indicator light 7. An ASCP meter 10 is also provided on the top surface of the housing 1, and an S1 short-circuit test button 8 is provided in a corner of the top surface of the housing 1.

[0021] A KM1 AC contactor 9 is provided inside the box 1 .

[0022] An auxiliary power port 11, a voltage port 12 and a current port 13 are provided on the outer wall of the box body 1 for connecting an auxiliary power supply and a signal source; the auxiliary power port 11 includes an auxiliary power port L and an auxiliary power port N, the voltage port 12 includes a voltage port Ua and a voltage port Un, and the current port 13 includes a current port Ia*current port and Ia.

[0023] The ASCP meter 10 is fixed to the top surface of the box 1 by means of a buckle, and its connection port is electrically connected to the test device via a probe.

[0024] join Figure 3 , Figure 3 This is a circuit connection diagram for the present invention. As shown, the QF1 air circuit breaker 2 is a mains-powered circuit breaker (CMB). Its input is connected to the auxiliary power port 11, and its output is connected to the power port of the ASCP meter 10, controlling access to the mains power. Furthermore, the output of the QF1 air circuit breaker 2 is connected to the S1 short-circuit test button 8 and the coil of the KM1 AC contactor 9. The S1 short-circuit test button 8 energizes the KM1 AC contactor 9 for short-circuit testing.

[0025] The QF2 air circuit breaker 3 is a signal source debugging circuit breaker. The input end of the QF2 air circuit breaker 3 is connected to the voltage port 12 and the current port 13 respectively, where the voltage port Ua and the current port Ia* are short-circuited. The output end of the QF2 air circuit breaker 3 is connected to the Lin, Nin, and Lout ports of the ASCP instrument 10 in sequence for controlling the access signal source.

[0026] The QF3 air circuit breaker 5 is a load debugging circuit breaker. The input end of the QF3 air circuit breaker 5 is connected to the Lout and Nout ports of the ASCP meter 10, and the output end of the QF3 air circuit breaker 5 is connected to the three-hole socket 4. The three-hole socket 4 can be connected to an external load. The load is a resistive load with a rated working voltage of 220V, 50Hz, and 3A~6A, which is used to put the load into short-circuit testing.

[0027] The QF4 air circuit breaker 6 is a short-circuit debugging circuit breaker. The input end of the QF4 air circuit breaker 6 is connected to the Lout and Nout ports of the ASCP meter 10. The output end of the QF4 air circuit breaker 6 is connected in parallel to the indicator light 7 and the normally open contact of the KM1 AC contactor 9. The normally open contact of the KM1 AC contactor 9 is used to simulate a short circuit of the external load. The indicator light 7 is used to indicate whether the ASCP meter 10 has completed short-circuit protection current limiting.

[0028] The utility model relates to a test device for an electrical fire-proof current-limiting protector. The test process is as follows:

[0029] (1) First, test the overvoltage, undervoltage, and overload protection functions. Disconnect QF1, QF3, and QF4, close QF2, and use a signal source to apply voltage and current signals to the ASCP instrument to simulate the phenomenon of overvoltage, undervoltage, and overload on site to verify whether the ASCP instrument can perform overvoltage, undervoltage, and overload protection.

[0030] (2) Then test the short-circuit protection function, disconnect QF2, close QF1, power the ASCP instrument with AC power, close QF3, insert a load resistor to simulate the power system load, close QF4, and the indicator light will light up, indicating that the system is operating normally;

[0031] (3) Press the short-circuit test button, the AC contactor KM1 is energized, the normally open contact is closed, and the load is short-circuited. At this time, the ASCP meter should limit the current protection, sound and light alarms, and the tooling indicator light will dim. If the short-circuit protection function of the ASCP meter is normal, the product is qualified.

[0032] The above are only specific application examples of the present invention and do not constitute any limitation on the scope of protection of the present invention. Any technical solution formed by equivalent transformation or equivalent replacement shall fall within the scope of protection of the present invention.

Claims

1. A test device for an electrical fire-proof current-limiting protector, characterized in that: The invention comprises a box (1), a KM1 AC contactor (9) and an ASCP meter (10); a QF1 air circuit breaker (2), a QF2 air circuit breaker (3), a three-hole socket (4), a QF3 air circuit breaker (5) and a QF4 air circuit breaker (6) are arranged side by side on the top surface of the box (1); an ASCP meter (10) is also provided on the top surface of the box (1); an S1 short circuit test button (8) is provided on the top surface of the box (1); a KM1 AC contactor (9) is provided inside the box (1); an auxiliary power port (11), a voltage port (12) and a current port (13) are provided on the outer wall of the box (1); the wiring port of the ASCP meter (10) is electrically connected to the test device through a probe; The QF1 air circuit breaker (2) is a mains debugging circuit breaker. The input end of the QF1 air circuit breaker (2) is connected to the auxiliary power port (11), and the output end of the QF1 air circuit breaker (2) is connected to the power port of the ASCP instrument (10) for controlling the access to the mains. At the same time, the output end of the QF1 air circuit breaker (2) is connected to the S1 short-circuit test button (8) and the coil of the KM1 AC contactor (9). The S1 short-circuit test button (8) controls the KM1 AC contactor (9) to be energized for short-circuit testing. The QF2 air circuit breaker (3) is a signal source debugging circuit breaker. The input end of the QF2 air circuit breaker (3) is connected to the voltage port (12) and the current port (13), respectively. The output end of the QF2 air circuit breaker (3) is connected to the Lin, Nin, and Lout ports of the ASCP instrument (10) in sequence for controlling the access signal source; the QF3 air circuit breaker (5) is a load debugging circuit breaker, and the input end of the QF3 air circuit breaker (5) is connected to the Lout and Nout ports of the ASCP instrument (10); the QF4 air circuit breaker (6) is a short-circuit debugging circuit breaker, and the input end of the QF4 air circuit breaker (6) is connected to the Lout and Nout ports of the ASCP instrument (10), and the output end of the QF4 air circuit breaker (6) is connected to the normally open contact of the KM1 AC contactor (9), and the normally open contact of the KM1 AC contactor (9) is used to simulate the short circuit of the external load.

2. A test device for an electrical fire-proof current-limiting protector according to claim 1, characterized in that: The top surface of the box (1) is also provided with an indicator light (7), the output end of the QF4 air circuit breaker (6) is connected to the indicator light (7), the indicator light (7) and the KM1 AC contactor (9) are connected in parallel, and the indicator light (7) is used to indicate whether the ASCP instrument (10) has completed short-circuit protection current limiting.

3. A test device for an electrical fire-proof current-limiting protector according to claim 1, characterized in that: The auxiliary power port (11) includes an auxiliary power port L and an auxiliary power port N, the voltage port (12) includes a voltage port Ua and a voltage port Un, and the current port (13) includes a current port Ia*, a current port and Ia, wherein the voltage port Ua and the current port Ia* are short-circuited.

4. A test device for an electrical fire-proof current-limiting protector according to claim 1, characterized in that: The output end of the QF3 air circuit breaker (5) is connected to a three-hole socket (4), and the three-hole socket (4) can be externally connected to a load, and the load is a resistive load with a rated working voltage of 220V, 50Hz, and 3A to 6A, and is used to input the load for short-circuit testing.

5. A test device for an electrical fire-proof current-limiting protector according to claim 1, characterized in that: The ASCP instrument (10) is fixed to the top surface of the box (1) by means of a buckle.

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