LJC-50kv voltage breakdown tester

1、 Manufacturing and inspection standards for products

1. GB1408.1-2006 "Test Methods for Electrical Strength of Insulation Materials"

2. GB1408.2-2006 "Test Methods for Electrical Strength of Insulation Materials Part 2: Additional Requirements for Application of DC Voltage Test"

3. JJG 795-2004 "Verification Regulations for Voltage Endurance Testers"

2、 Applicable test method standards

1. GB/T1695-2005 "Determination method for power frequency breakdown voltage strength and withstand voltage of vulcanized rubber"

2. GB/T3333 "Test Method for Power Frequency Breakdown Voltage of Cable Paper"

3. GB12913-2008 "Capacitor Paper"

4. ASTM D149 "Test Method for Dielectric Breakdown Voltage and Dielectric Strength of Solid Electrical Insulation Materials at Industrial Power Supply Frequency"

Three application scopes

Mainly suitable for testing the breakdown strength and withstand time of solid insulation materials such as wire sleeves, resins and adhesives, impregnated fiber products, mica and its products, plastics, film composite products, ceramics and glass under power frequency voltage or DC voltage; This instrument is computer-controlled and can quickly and accurately collect, process, access, display, and print various data during the experimental process.

Four main technical indicators

1. Input voltage AC220V 50Hz

2 output voltage AC: 0-50kV;  DC：0～50kV

3 output power 5kVA

Measurement range: AC~50kV;  DC～50kV

Measurement error ≤ 2%

Step up rate of 0.1kV/s to 5kV/s

7 withstand voltage time 0-6H

8 leakage current 1-30 mA can be freely set by computer software

9 power supply AC 220V ± 10% single-phase AC voltage and 50Hz ± 1% frequency

Test environment temperature: 15-30 ℃, relative humidity: 0-85%, can operate stably.

11 External dimensions: length x width x height: 700mm x 800 mm x 1400mm (reference)

The weight of the 12 devices is 100kg (reference)

13 Grounding Requirements: The instrument needs to be separately grounded, and the grounding should comply with national standards. The metal rod should be buried at least 1.5 meters deep underground

Five structural principles and performance characteristics

This equipment mainly consists of: boost system (high voltage transformer), measurement system, A/D converter, discharge system, electrodes, oil tank, electrode positioning bracket, computer data processing system, software, etcComputer - A/D converter - Measurement and control system - Voltage regulating device - Step up transformer - SampleHigh voltage transformers mainly generate the DC voltage required for the sample,A voltage regulator is used to regulate the input voltage of a step-up transformer to generate the required input voltage for high voltage,

Voltage measurement is mainly measured from the measuring end of the high-voltage transformer, and the measuring end of the high-voltage transformer and the high-voltage end are linear,

The discharge system will automatically discharge after the experiment is completed to avoid potential harm to human health caused by discharge;

6、 Computer systems and software packages

The experimental software is a powerful, easy-to-use, and intuitive experimental software system newly developed by our company.

This instrument adopts computer control and human-machine dialogue to complete the power frequency voltage breakdown and power frequency withstand voltage test of insulation media.

1. During the experiment, the test curve can be dynamically drawn, and the test curve can be overlaid with multiple colors for comparison, locally enlarged, and any section of the curve can be analyzed by enlarging the area;

2. Can edit and modify experimental data, flexible and applicable;

3. The experimental conditions and test results can be automatically stored;

4. The format of the test report is flexible and adaptable to meet the different needs of different users;

5. The validity of curve data in a set of experiments can be manually selected;

6. The experimental result data can be imported into Excel and edited in WORD documents;

7. The software equipment personnel management function allows test personnel to set their own test items and parameters, and after setting their own test content, others cannot enter the program;

8. The overcurrent protection device has sufficient sensitivity to ensure that the power is cut off within 0.1 seconds when the sample breaks down;

9. Durability of instrument operation: The instrument can operate continuously without the need for periodic shutdowns to protect it.

7、 Safety instructions for high-voltage breakdown equipment:

1. The equipment needs to be equipped with a separate protective grounding wire. Grounding protection is mainly used to reduce the strong electromagnetic interference caused by the breakdown of the sample to the surrounding area. It can also prevent the computer from losing control.

2. DC test discharge alarm function: When the device completes the DC test, the device will automatically alarm when the test door is opened, and the alarm will be automatically cancelled after the discharge device on the device is used for discharge (Note: Since not discharging electricity after DC testing can endanger personal safety, the electrode cannot be directly taken to remind the user to discharge to avoid personal injury).

3. The experimental discharge device is integrated with the main unit, improving the previous function of having a separate discharge pole.

4. The circuit of the experimental equipment is equipped with multiple protection measures, mainly including overcurrent protection, voltage loss protection, leakage protection, short circuit protection, DC test discharge alarm, etc.

5. Nine level safety protection measures:

① Overpressure protection

② Test overcurrent protection

③ Voltage regulator reset switch

④ Test box door safety switch

⑤ Automatic discharge protection (with manual discharge device)

⑥ Leakage protection switch

⑦ Test short-circuit protection

⑧ Independent grounding protection

⑨ Safety net protection