供应

LDH-20kV型耐电弧试验仪是根据GB/T 1411-2002《固体绝缘材料耐高压低电流电弧放电的试验》（等同IEC  61621-1997）及ASTM D495等标准的要求设计制造的，并符合IEC 149、UL 746A等试验方法。本仪器由绝缘标准制定单位全国绝缘材料标准化技术委员会监制。

主要用于电机、电器及家电等行业的电工用塑料、树脂胶、绝缘漆、以及层压板、覆铜箔板等绝缘材料的耐电弧性能及其分级评定。

1、本机为上下一体结构，下部为操作系统，上部为试验箱。

2、本产品采用PLC控制，提高抗干扰性能、电压、电流测量精度。

3、10寸触控屏操作界面，方便快捷，可通过选择程序（IEC或ASTM）自动进行试验，并数显各试验过程和结果。

4、计量方便。可选择任意时段程序进行计量，快捷高效。

5、试验过程中有步进控制稳压功能，不受电网电压波动影响。

6、控制界面上有合闸、零位、升压、降压、程序段等监控功能。

7、电压和电流的实时监控功能。

8、软件电流保护和电压保护功能，硬件电流保护和电压保护功能。

9、在触控屏界面有电压和电流的线性校正功能，可以任意修正，方便、快捷、高效。

1 电弧通断时间误差：1/8段程序小于?5ms，其余小于1ms

2 调压器容量：1kVA

3 额定试验电压：12.5kV

  最高试验电压：15kV

4 试验电压精度：?1.0%

5 电流控制精度：?10%  电流测量精度：1.5%

6 电极对试样压力：（0.5?0.05）N

7 电极材料：钨棒

8 电极距离：（6.35?0.1）mm（IEC/ASTM）    9 使用环境温度：（23?2）℃

10 使用环境湿度：（50?5）%

11 电源：220V?5%  50Hz  10A

12 试验程序如下：

本仪器分上下两层。上层为试验箱，内置试验电极系统、高压输出插孔、试验电流表等；用有机玻璃门封闭，便于观察并确保安全，上有通风孔。

仪器下层为电气箱。右后部装有高压试验变压器、保护电阻及高频抑制电感等，左后前部为调压器，中部和前部为主电路控制电路及触控屏控制界面。

本测试仪是在相距 (6.35?0.1)mm的两电极上，按试验方法规定的规律（见试验程序表），由间歇到连续地施加12.5kV工作电压和(10～40)mA的电弧电流，直至试样失效。记下从试验开始到试样失效的总时间（s），即为该试样的耐电弧。其电气原理图见图1。试验电压的产生是由220V交流电压经调压器T5，再由高压试验变压器T4而产生。试验电压12.5kV由调压器T5调节获得。试验电流的大小和通断时间，由PLC控制接在调压器T5和高压试验变压器T4之间的四路固体开关和串联电阻而获得。

1电弧测试仪主机       1台   

2电极系统         1套

3电源电缆         1根   

4接地放电棒        1根    

5试样架         1套

6电极距离标准块（6.35mm）    1块

7角度标准块        1块

8使用说明书        1本

9合格证书         1本

10出厂测试报告       1份

11送货单         1份

七、动力和安全要求

1、 LDH-20KV型耐电弧试验仪    三孔扁插座220V 10A        1个

2、仪器设备均需要接地且接地电阻≤1Ω，供需双方商定由供方提供技术要求，由需方自己建造接地系统。

主要适用范围及功能
   本试验机是按照GB1411-2002 、IPC650、IEC61621、ASTMD495设计制造，并符合JEC149、UL746A等试验方法。应用于电机、电器和家用电器等行业的电工用塑料、树脂胶和绝缘漆等绝缘材料的耐电弧性能评定。主要适用于固体绝缘材料如：塑料、薄膜、树脂、云母、陶瓷、玻璃、绝缘油、绝缘漆、纸板等介质的耐电弧性能测试；耐电弧试验机采用计算机控制，试验过程中可在线观察试验曲线；自动存储试验条件及试验结果等数据，并可存取、显示、打印。

试验过程描述
   过程    弧电流/mA         通断时间/秒    持续时间/秒       试验所经时间/秒
1/8-10       10            1/4s通 7/4s断        60                      60
1/4-10       10            1/4s通 7/4s断        60                     120
1/2-10       10            1/4s通 7/4s断        60                     180
    10       10              导通               60                     240
    20       20              导通               60                     300
    30       30              导通               60                     360
    40       40              导通               60                     420

Overview

The LDH-20kV arc resistance tester is designed and manufactured according to the requirements of GB/T 1411-2002 "Solid Insulation Materials - Test for Resistance to High and Low Voltage Current Arc Discharge" (equivalent to IEC 61621-1997) and ASTM D495 standards, and complies with test methods such as IEC 149 and UL 746A. This instrument is supervised by the National Technical Committee for Standardization of Insulation Materials, the unit responsible for formulating insulation standards.

The arc resistance performance and grading evaluation of electrical plastics, resin adhesives, insulation paints, as well as insulation materials such as laminated boards and copper-clad laminates, mainly used in industries such as motors, electrical appliances, and home appliances.

Two functional features

1. This machine has an integrated upper and lower structure, with the lower part being the operating system and the upper part being the test chamber.

2. This product adopts PLC control to improve anti-interference performance, voltage and current measurement accuracy.

3. 10 inch touch screen operation interface, convenient and fast, can automatically perform tests by selecting programs (IEC or ASTM), and display the test process and results in digital format.

4. Convenient measurement. You can choose any time period program for measurement, which is fast and efficient.

5. During the experiment, there is a step control voltage stabilization function that is not affected by fluctuations in the power grid voltage.

6. The control interface has monitoring functions such as closing, zero position, boost, buck, program segment, etc.

7. Real time monitoring function for voltage and current.

8. Software current protection and voltage protection functions, hardware current protection and voltage protection functions.

9. There is a linear correction function for voltage and current on the touch screen interface, which can be adjusted freely, conveniently, quickly, and efficiently.

Three main technical parameters

1. Error in arc on-off time: 1/8 segment of the program is less than ? 5ms, and the rest is less than 1ms

2. Voltage regulator capacity: 1kVA

3. Rated test voltage: 12.5kV

Maximum test voltage: 15kV

Test voltage accuracy: ? 1.0%

5 Current control accuracy: ? 10% Current measurement accuracy: 1.5%

6 electrode to sample pressure: (0.5 ? 0.05) N

7 electrode material: tungsten rod

8 Electrode distance: (6.35 ? 0.1) mm (IEC/ASTM) 9 Operating ambient temperature: (23 ? 2) ℃

10. Environmental humidity for use: (50 ? 5)%

11 Power supply: 220V ? 5% 50Hz 10A

The 12 test procedures are as follows:

Program segment arc current

MA arc on-off time s duration of each program segment s total test time s

IEC 61621 ASTM D495

1 10 1/8s on 7/8s off 1/4s on 7/4s off 60 60

2 10 1/4s on 3/4s off 1/4s on 3/4s off 60 120

3 10 1/4s on 1/4s off 1/4s on 1/4s off 60 180

4 10 continuous 60 240

5 20 continuous pass 60 300

6 30 continuous 60 360

7 40 continuous pass 60 420

Four Structure and Composition

This instrument is divided into two layers. The upper layer is a test chamber with built-in test electrode system, high-voltage output socket, test ammeter, etc; Sealed with organic glass doors for easy observation and safety, with ventilation holes on top.

The lower layer of the instrument is an electrical box. The right rear is equipped with a high-voltage test transformer, protective resistor, and high-frequency suppression inductor. The left rear front is a voltage regulator, and the middle and front are the main circuit control circuit and touch screen control interface.

Introduction to Five Working Principles

This tester applies a working voltage of 12.5kV and an arc current of (10-40) mA intermittently to continuously on two electrodes separated by (6.35 ? 0.1) mm according to the rules specified in the test method (see test procedure table), until the sample fails. Record the total time (s) from the start of the experiment to the failure of the specimen, which is the arc resistance of the specimen. The electrical schematic diagram is shown in Figure 1. The generation of test voltage is generated by 220V AC voltage passing through regulator T5, and then by high-voltage test transformer T4. The test voltage of 12.5kV is regulated by voltage regulator T5. The magnitude and on/off time of the test current are obtained by controlling the four solid switches and series resistors connected between the voltage regulator T5 and the high-voltage test transformer T4 through PLC.

Ten standard configurations

1 main unit of arc tester

2 electrode systems, 1 set

3 power cables, 1 piece

4 grounding discharge rods, 1 piece

5 sample racks, 1 set

6 electrode distance standard block (6.35mm) 1 block

One 7-angle standard block

8 user manuals 1 book

1 certificate of conformity

10 Factory Test Reports 1 copy

11 delivery note 1 copy

7、Power and safety requirements

1. LDH-20KV arc resistance tester three hole flat socket 220V 10A 1

2. All instruments and equipment need to be grounded with a grounding resistance of ≤ 1 Ω. The supply and demand parties agree that the technical requirements shall be provided by the supplier, and the grounding system shall be constructed by the demand party themselves.

Main application scope and functions

This testing machine is designed and manufactured in accordance with GB1411-2002, IPC650, IEC61621, ASTMD495, and complies with JEC149, UL746A and other testing methods. Evaluation of arc resistance performance of insulation materials such as plastics, resin adhesives, and insulating paints used in the electrical, electrical, and household appliance industries. Mainly suitable for testing the arc resistance performance of solid insulation materials such as plastics, films, resins, mica, ceramics, glass, insulation oil, insulation paint, cardboard and other media; The arc resistance testing machine is computer-controlled, and the test curve can be observed online during the testing process; Automatically store test conditions and test results data, and can access, display, and print them.

Experimental process description

Process arc current/mA on-off time/second duration/second test duration/second

1/8-10 10 1/4s on/7 4s off 60 60

1/4-10 10 1/4s on/7/4s off 60 120

1/2-10 10 1/4s on/7/4s off 60 180

10 10 conductivity 60 240

20 20 conductive 60 300

30 30 conductive 60 360

40 40 conductive 60 420

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