Lightning Protection Component Tester

Lightning Protection Component Tester Performance Features

The Lightning Protection Component Tester is suitable for measuring the DC parameters of overvoltage protection elements such as zinc oxide surge arresters (voltage-sensitive resistors), metal ceramic two/three electrode discharge tubes, and vacuum surge arresters. It can also serve as a voltage-regulating and constant current power supply, applicable to other uses.

The lightning protection component tester features high-voltage short-circuit protection, overcurrent protection, high-voltage presetting, and range adjustment functions, with a high-voltage self-discharge time less than 0.5 seconds.

Self-checking function.

The measurement data is displayed on a 3 1/2 LCD digital screen, offering high accuracy and reliability.

During measurement, the range can be pre-set, and an audible alert will be triggered if the measurement exceeds the range, suitable for device grouping and discrimination.

Choose continuous measurement for uninterrupted testing of batch samples.

The panel features a simple and user-friendly interface.

Lightweight and portable.

Power Supply

The back panel of this unit features an external AC power three-prong socket. It is compatible with a 220V, 50Hz AC power grid. An AC power cord is included in the accessories.

The unit also features an external DC power input socket of 12V/0.5A, with the core wire being the "+" pole. Users should pay attention to the polarity and wire diameter when providing their own power cable.

Prepared

1. Set all the self-locking push-button switches on the instrument panel to the high position and turn the adjustment knob counterclockwise to the end (small). Insert the test wires provided with the machine into the "+" and "-" test holes on the panel. Connect the external power source to the corresponding power socket (hole) on the back panel.

Turn on the power switch, and the instrument display should show "000."

3 Test

1. Sensitive Resistor Testing

Range Setting

"Sensitive Resistor/Discharge Tube" switch set to the high position (Sensitive Resistor), "Single/Continuous" switch set to the high position (Single), turn the "Voltage Pre-set" knob clockwise to the fullest (High). Press the High Voltage button to activate high voltage; the high voltage indicator light illuminates, and the display shows the upper limit of the test voltage range. Adjust the "High Voltage Limit" knob to the desired value (upper limit of the test range).

Adjust the "Voltage Preset" knob to select the value you need (for determining the lower limit of the test range).

At this point, the actual test range is 0V to the set upper limit of the range.

Measurement

a) The tested photoresistor is connected to the measuring line, and by clicking the "High Voltage Start/Stop" button, the high voltage indicator light illuminates. The display immediately shows the starting action voltage U1mA test value, with the unit behind the number being "V". Pressing the "Test" button, approximately 2 seconds later, it automatically switches to the leakage current I0.75U1mA test value, with the unit behind the number being "μA". The green indicator light lights up in sync with the leakage current display and turns off after about 2 seconds. b) When the U1mA value of the tested photoresistor is below the voltage preset value, the display shows the voltage preset value dropping to the vicinity of its U1mA value after connection. You can click the "Test" button to continue with the next step of the test. If it is above the upper limit of the range, the U1mA period during the test process displays the preset range upper limit value. At this time, the test current is less than 1mA, and the displayed test data is invalid. To change the sample for measurement or to take another measurement, simply click the "Test" button again.

c) For continuous measurements, set the "Single/Continuous" switch to the low position (continuous). (To select continuous measurement before turning on high voltage, tap the "Test" button once.)

Self-Inspection and Others

a) Inspection of 1mA value for the photoresistor test

Select "Photoresistor" test, turn on high voltage, preset the voltage adjustment to above 10V, short-circuit the test holes "+""-" ends, the display should show "000V". Press and hold the "Display Conversion" button, it should display "1000μA".

b)  Inspection of 0.75Ω at 1mA for the photoresistor test

During the test, when clicking the "Test" button, the display should show the upper range value. Holding down the "Display Conversion" button during the red light phase should display 0.75 times the upper range value.

During the testing process, hold down the "Display Conversion" button (do not release): during the U1mA measurement period, the displayed value is for the test condition of 1mA (1000μA); during the I0.75U1mA measurement period, the displayed value is for the test condition of 0.75U1mA.

Additionally, with the voltage preset and range adjustment functions, the device can serve as a 1999V/1mA DC voltage regulator and a 1mA constant current source (the instrument maintains a constant output of 1mA when the load current reaches 1mA).

By using the "Display Conversion" key in conjunction with the ammeter, load voltage and current (V/I characteristics) values can be measured.

Discharge Tube Testing

Range Setting

"Sensitive Resistance/Discharge Tube" switch set to low position (Discharge Tube), set the range as per Method 1.

2 Measure

The discharge tube to be tested is connected to the test line.

If the green indicator light is on, it indicates that the test item's ignition voltage value Vsdc is less than the "Voltage Preset" value (below the overrange lower limit), and the buzzer sounds an alarm. At this point, the test item should be removed promptly; otherwise, it will be repeatedly ignited.

If the green indicator light is not illuminated, it indicates that the ignition voltage Vsdc of the item being tested is greater than the "Voltage Preset" value. Click the "Test Button" to proceed to the next step.

b) After clicking the "Test" button, the test voltage begins to rise from the voltage preset value at a rate of 100V/S until the green indicator light illuminates.

If the buzzer does not beep, the display will show the value within the measurement range.

If the buzzer sounds, the display will show the upper limit of the measurement range. At this point, it indicates that the ignition voltage (Vsdc) of the item being tested exceeds the upper limit of the measurement range (overrange upper limit) without ignition.

The green indicator lights up and the corresponding displayed value (with an audible beep in the event of an overload range) disappears after approximately 2 seconds, after which it returns to the preset state.

Remove the tested discharge tube during the green indicator light, restore the preset voltage, and then reconnect the next discharge tube for the next test.

c) Continuous Measurement

Set the "Single/Continuous" switch to the low position (Continuous position) for continuous measurements.

After testing, click the "High Voltage" button to turn off the test voltage, and switch the back panel power switch to "OFF" to shut off the power. Remove the power cord when using an external DC 12V power supply.