ASTM D149 Electrical Dielectric Strength Tester

one The standard on which this instrument is based

LJC50EThe type of breakdown voltage tester is based onDesigned and manufactured in accordance with the requirements of standards such as GB/T 1408.1 (equivalent to IEC 60243-1) "Test Methods for Electrical Strength of Solid Insulation Materials under Power Frequency".ASTM D149 Electrical Dielectric Strength Tester

two Scope of Application

ASTM D149 Electrical Dielectric Strength TesterMainly used for various electrical purposesEpoxy boardfilm, Softcomposite materialResin glue and rubber, plasticWaiting for insulation materialsBreakdown voltage andElectrical strength testing.

three Features

1The main control part is controlled by SiemensPLCand10Cunbu Ke touch screen control, with real-time curve description function for current and voltage, monitoring functions such as closing, zero position, boost, and buck, with intuitive display and convenient operation;

2. The digital filtering technology used avoids the influence of strong discharge interference at the moment of breakdown on the test results, ensuring the accuracy of the test results;

3. The door interlock switch adopts 24V safe voltage, which is safe and reliable;

4. Voltage withstand testSometimes there is automaticVoltage stabilization function(Not affected by voltage fluctuations in the power grid);

5. Boosting speed from（0.01～5.00kV/sStepless adjustable.

four Main technical parameters

1. Maximum test voltage: AC/DC 50.0kV

2. Effective voltage measurement range: the highest test voltage value（20~100）%

3. Accuracy of test voltage:resolution0.01kV，superior to2.0%（20%～100%Relative error within the effective voltage measurement range

4Capacity:3kVA

5 Protection resistors: (25-50)kΩ

6 Boosting speed:（0.01～5.00）kV/s

7 Voltage endurance time range:1s～30min59s precision0.1s

8 Overcurrent leakage current:1～50mA, Resolution0.01mA

9 Test methods: continuous boost, constant voltage withstand, step boost

10Stop detection methods: voltage stop detection, current stop detection, time stop detection

11 Power Supply:220V±10% 10 A 50Hz

five Functional requirements

System functions

1. The system has program selection functions for fast boost, constant withstand voltage, and step-by-step boost test methods;

2. The system has safety protection functions such as overcurrent, overvoltage, emergency stop, interlock, etc;

3. There is a judgment function for sample failure (voltage, current, time judgment stop mode);

4. The function of dynamically drawing the curve of the test voltage during the experiment;

5. The function of maintaining voltage and time at the moment of sample failure;

6. Linear correction and zero point correction functions for voltage and current;

7. During the withstand voltage test, there is a step control voltage stabilization function;

8. The system can achieve stepless speed regulation and automatic pressure rise and fall function.

9. Curve graphs and experimental reports can be generated for each experiment, and test data can be saved as Excel files.

Console interface functions

1. Real time dynamic display of test current, voltage, and time, and maintenance display of breakdown moment current, voltage, and time;

2. Status monitoring display for closing, zero position, upper limit, boost, buck, constant voltage, emergency stop, etc;

3. The operation interface has a start button, a stop button, an emergency stop button, and a high voltage indicator light;

4. There are selection switches for "breakdown", "withstand voltage", and "step-by-step boost";

5. It has the functions of setting "test voltage", "overcurrent value", "boost speed", and "withstand voltage time";

6. Real time display of test voltage curve.

safety protection

Automatic zeroing protection measures: The equipment automatically returns to the zero position safety state in the non closed state;

Zero limit start protection: It can only be started after the voltage regulator is reset to zero to prevent the generation of transient surge voltage;

Door interlock protection: The safety door in the high-voltage test area can only be started when it is closed. When it is opened, the high voltage will be automatically cut off to prevent people from accidentally entering and getting electrocuted;

Limit switch protection: Set up upper and lower limit switches to test the voltage within the zero and full range range range. During the voltage regulation process, the high voltage will be automatically cut off when the limit is reached to prevent voltage from exceeding the range;

Overvoltage and overcurrent protection: The voltage and current thresholds can be set arbitrarily within the full range, and the high voltage will be automatically cut off if the threshold is exceeded;

Air circuit breaker protection: The equipment is equipped with a main power air switch to prevent short circuit overload in the test main circuit or control circuit, and to effectively cut off the power supply when overcurrent, overvoltage and other protective measures fail;

Overload and melting protection measures for fuses: Install fuses in the test control circuit to effectively melt the power supply of the control circuit in case of short circuit faults or other situations in the control system;

Emergency stop button: The equipment is equipped with an emergency stop button to quickly and effectively cut off the power supply of the test circuit in case of dangerous situations such as fire;

High voltage warning light: The warning light lights up after closing, indicating the presence of high voltage, and goes out after disconnecting, serving as a warning.

six Structure and Composition

This system consists of two parts

（1) Control section. The breakdown instrument host is equipped with an electrical control system to control the rise and fall of high voltage, measurement, start and stop of tests, identification and tripping protection of breakdown and flashover, judgment of test termination, and display of data.

（2) High voltage testing section. Composed of experimental transformers, protective resistors, electrode systems, etc.

seven Standard Configuration

（1）Breakdown system host 1Taiwan

（2）Protection resistor1a

（3）Power cable1root

（4）Grounding rod1root

（5）Test electrode 1set

（6）Factory Test Report1copy

（7）User Manual1copy