CN104375044A - A/S characteristic test device for high-voltage alternating current fuse - Google Patents

Abstract

The application relates to a high-voltage AC fuse AS characteristic testing device, which includes a current generator AC, and a current relay, a fuse fixture and a current transformer are connected to the series circuit of the current generator, and the output contacts of the current relay are connected in parallel to A timer, the timer is connected in parallel with the current relay, an ammeter is connected in parallel at the current transformer, a voltmeter is connected in parallel at the fuse holder, and a high-voltage AC fuse is connected in series in the fuse holder. This application adopts the current measurement and timing circuit. Under the power frequency voltage which is far less than the fusing voltage of the high-voltage fuse and eliminates the influence of excessive voltage on the fuse, different current values are added to both ends of the fuse to be tested, and the timing device is used for current sampling. Timing, and then the A/S characteristic curve and related technical data of this type of fuse can be simulated.

Description

High-voltage AC fuse AS characteristic test device

technical field

The present application relates to a high-voltage AC fuse AS characteristic testing device.

Background technique

At present, in the power system, high-voltage fuses are widely used for overload and short-circuit protection of power lines, transformers, voltage transformers and other electrical appliances, but the corresponding devices and instruments for testing the A/S characteristics of high-voltage fuses are not available in China. No similar products found. Whether the A/S characteristics of the high-voltage fuse are qualified, whether it is consistent with the nameplate mark, and whether it meets the operating requirements, these series of problems are unknown, and corresponding technical means are required to detect them.

Contents of the invention

The purpose of this application is to provide a high-voltage AC fuse AS characteristic testing device that can test the AS characteristics of the high-voltage AC fuse, determine its parameters, and satisfy the actual use.

The purpose of this application is achieved in that the high-voltage AC fuse AS characteristic testing device includes a current generator AC, and a current relay, a fuse clamp and a current transformer are connected on the series circuit of the current generator, and the output of the current relay The contacts are connected in parallel to the timer, the timer is connected in parallel with the current relay, an ammeter is connected in parallel at the current transformer, a voltmeter is connected in parallel at the fuse holder, and a high-voltage AC fuse is connected in series in the fuse holder.

Due to the implementation of the above-mentioned technical scheme, this application adopts a current measuring and timing circuit, and under the power frequency voltage which is far less than the fusing voltage of the high-voltage fuse and eliminates the influence of excessive voltage on the fuse, different current values are added to both ends of the fuse to be tested. Through current sampling, the timing device counts, and then the A/S characteristic curve and related technical data of this type of fuse can be simulated.

Description of drawings: the technical scheme of the present application is given by the following drawings and examples:

Figure 1 is a schematic circuit diagram of a high-voltage AC fuse AS characteristic test device;

Fig. 2 is a schematic diagram of the structure of the fuse holder.

Legend: 1. Fixed clip seat; 2. Insulation seat; 3. High-voltage AC fuse; 4. Moving clip seat; 5. Slider, 6. Slide rail, 7. Base, 8. Outrigger.

Detailed ways:

The present application is not limited by the following examples, and specific implementation manners can be determined according to the technical solutions of the present application and actual conditions.

Embodiment: as shown in Figure 1, high-voltage alternating current fuse AS characteristic testing device it comprises current generator AC, is connected with current relay, fuse clamp and current transformer on the series circuit of current generator, the described current relay The output contacts are connected in parallel to the timer, and the timer is connected in parallel with the current relay. An ammeter is connected in parallel at the current transformer, a voltmeter is connected in parallel at the fuse holder, and a high-voltage AC fuse 3 is connected in series in the fuse holder.

Described fuse fixture comprises base 7, is provided with fixed and movable clamp seat 1,4 on base 7, and described movable clamp seat 4 is fixed on the slider 5, and slider 5 slides in slide rail 6, and slide rail 6 Arrange along the surface of the base 7. An insulating seat 2 is arranged under the fixed and moving clip seats 1 and 4. The fixed and movable clip seats 1 and 4 are hoops on which connection points are reserved, and the two ends of the high-voltage AC fuse 3 are clamped in the fixed and movable clip seats 1 and 4 respectively. Legs 8 are provided on the bottom surface of the base 7, and the legs 8 are insulating parts.

The ammeter is a digital ammeter, the voltmeter is a digital voltmeter, both the digital ammeter and the digital voltmeter are connected to a data acquisition terminal, and the data acquisition terminal is a computer.

The device starts timing by closing the output contact of the current relay to start the timer. At the same time, in order to expand the measurement range of the device, the current transformer and digital ammeter are used to measure the current of the main circuit. When in use, the current generator outputs low-voltage and high-current, and the timer is triggered to start timing through the ammeter relay and the output contact of the ammeter relay. The digital voltmeter and the digital ammeter respectively record the current passing through the high-voltage AC fuse 3 and the voltage at both ends. Provide test data for measuring the A/S characteristics of the test high-voltage AC fuse 3 . At the end of the test, compare the test data with the factory data of the high-voltage AC fuse 3 to determine whether it is qualified.

The above technical features constitute the best embodiment of this application, which has strong adaptability and best implementation effect, and non-essential technical features can be added or subtracted according to actual needs to meet the needs of different situations.

Claims (7)

1. a high-voltage alternating fuse AS characteristic test device, it is characterized in that: it comprises current feedback circuit AC, the series loop of current feedback circuit is connected with current relay, fuse fixture summation current transformer, the output contact of described current relay is connected in parallel to timer, timer is in parallel with current relay, at current transformer, place is parallel with reometer, and at fuse fixture, place is parallel with voltage table, and high-voltage alternating fuse is connected in fuse fixture.

2. high-voltage alternating fuse AS characteristic test device as claimed in claim 1, it is characterized in that: described fuse fixture comprises base, and base is provided with fixed and moving holder, described dynamic holder is fixed on slide block, slide block slides in slide rail, and slide rail is laid along susceptor surface.

3. high-voltage alternating fuse AS characteristic test device as claimed in claim 2, is characterized in that: be arranged with insulating base at fixed and moving holder.

4. high-voltage alternating fuse AS characteristic test device as claimed in claim 2, it is characterized in that: described fixed and moving holder is anchor ear, is reserved with wiring point thereon, high-voltage alternating fuse two ends are clamped in fixed and moving holder respectively.

5. high-voltage alternating fuse AS characteristic test device as claimed in claim 2, it is characterized in that: base end face is provided with supporting leg, described supporting leg is insulating element.

6. high-voltage alternating fuse AS characteristic test device as claimed in claim 1, it is characterized in that: described reometer is digital electronic ammeter, described voltage table is digital voltmeter, and described digital electronic ammeter and digital voltmeter are all connected with data acquisition end.

7. high-voltage alternating fuse AS characteristic test device as claimed in claim 6, is characterized in that: described data acquisition end is computing machine.