LDH-20KVArc resistance tester

oneOverview

LDH-20kVType arc resistance testInstrument is based onGB/T 1411-2002Test for Resistance of Solid Insulation Materials to High and Low Voltage Current Arc Discharge (Equivalent)IEC 61621-1997）AndASTM D495Designed and manufactured according to standard requirements,And comply withIEC 149TheUL 746AWaiting for experimental methods.This instrument is supervised by the National Technical Committee for Standardization of Insulation Materials, the unit responsible for formulating insulation standards.

Mainly used forElectrical plastics and resin adhesives used in industries such as motors, appliances, and household appliances、insulating varnish、And laminated boards, copper-clad laminatesThe arc resistance performance and grading evaluation of insulation materials.

twoFeatures

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 adoptsPLCControl and improve anti-interference performance, voltage and current measurement accuracy.

3、10Inch touch screen operation interface, convenient and fast, can be accessed by selecting programs（IECorASTM）Automatically conduct experiments, andnumberShow the process of each experimentAnd the result.

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

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

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

7Real time monitoring function for voltage and current.

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

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

threeMain technical parameters

1 Error in arc on-off time:1/8Duan program is less than±5msThe rest are less than1ms

2 Voltage regulator capacity:1kVA

3 Rated test voltage:12.5kV

Maximum test voltage:15kV

4 Test voltage accuracy:±1.0%

5 Current control accuracy:±10%Accuracy of current measurement: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 useEnvironmental temperature:（23±2）℃

10 useEnvironmental humidity:（50±5）%

11 power supply220V±5% 50Hz 10A

12 The experimental procedure is as follows:

fourStructure 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.

fiveIntroduction to Working Principle

This tester is located at a distance (6.35±0.1)mmApply intermittently to the two electrodes according to the rules specified in the test method (see the test procedure table) and then continuously12.5kVWorking voltage and(10～40)mAThe arc current is maintained until the sample fails. Record the total time from the start of the experiment to the failure of the specimen（s）, which is the arc resistance of the sample. The electrical schematic diagram is shown in the figure1The generation of test voltage is caused by220VAC voltage through voltage regulatorT5Then, using a high-voltage test transformerT4And generated. test voltage12.5kVBy regulatorT5Adjust to obtain. The magnitude and on/off time of the test current are determined byPLCControl connected to the regulatorT5High voltage test transformerT4Obtained through four solid-state switches and series resistors.

tenStandard Configuration

1Main unit of arc tester 1Taiwan

2Electrode system 1set

3power cable 1root

4Grounding discharge rod 1root

5Sample rack 1set

6Electrode distance standard block（6.35mm） 1block

7Angle standard block 1block

8Instruction Manual 1this

9Certificate of Compliance 1this

10Factory Test Report 1copy

11Delivery Note 1copy

7、 Power and safety requirements

1LDH-20KV arc resistance tester with three hole flat socket 220V 10A1 piece

2. Instrument equipmentAll equipment needs to be grounded and have a grounding resistance≤ 1 Ω, both parties agree that the supplier shall provide technical requirements and the demander shall construct the grounding system themselves.