Darui Electric recommends:
Other Specifications of Vacuum Arrester Tester
l Insulation Resistance: 6MΩ(500V)
l Withstand Voltage: AC 1.5kV 50Hz 1min
l Operating Temperature and Humidity: 0～+40℃ ＜85%RH
l Storage Temperature and Humidity: -10℃～+50℃ ＜90%RH
l Power Supply: AC220V±10% or DC12V ±0.5V 1000mA
l Power Consumption: 12W
l Dimensions: 208mm(L)×190mm(W)×78mm(D)
l Weight: ≤2kg
4. Usage of FC-2GB
4.1 Testing Varistors with "Auto" Position
4.1.1 Turn on the power, set the "Test Selection" key on the panel to "Varistor" position; set the "U0.75 Selection" key to "Auto" position, and set the "Display Switch" on the panel to "Voltage" position.
4.1.2 Connect the varistor under test to the "+" and "-" terminals of the "Test Hole" using test leads, then lightly press the high-voltage "Start" key. The instrument will display the initial action voltage U1mA value. Then press and hold the "Leakage Current" key, the instrument will display the 0.75U1mA voltage value. If you also set the "Display Switch" on the panel to "Current" position, the instrument will display the I 0.75U,1mA value; release the "Leakage Current" key, and the instrument will display the current flowing through the varistor under test, approximately 1mA.
4.1.3 Lightly press the high-voltage "Stop" key and then remove the varistor under test.
4.2 Testing Varistors with "Manual" Position
4.2.1 Set the "Test Selection" key to "Varistor" position; set the "U0.75 Selection" key to "Manual" position; set the "Display Switch" to "Voltage" position. Turn on the power and high voltage, then adjust the "High Voltage Preset" knob to set the preset high voltage value to more than 1.2 times the nominal value of the varistor to be tested. Turn off the high voltage; connect the varistor under test. At this point, you can start and stop the high voltage to continuously test multiple similar varistors for the single U1mA parameter.
4.2.2 Based on the measured U1mA value of the varistor, calculate the 0.75U1mA value. Adjust the preset voltage of the instrument to this value, then set the "Display Switch" to "Current" position. Without turning off the high voltage, press and hold the "Leakage Current" key, and connect varistors with the same U1mA value for continuous testing of the single I 0.75U,1mA parameter.
4.3 Discharge Tube Testing
4.3.1 Set the "Test Selection" key to "Discharge Tube" position; set the "U0.75 Selection" key to "Manual" position; turn on the power and high voltage.
4.3.2 Adjust the "High Voltage Preset" knob to set the preset voltage value displayed by the instrument to be lower than the nominal value of the discharge tube under test by 100V or more, down to the initial position (approximately 15V).
4.3.3 Connect the discharge tube under test to the "+" and "-" terminals of the "Test Hole" using measurement leads. Lightly press the "Boost" key. When the green "Discharge" indicator lights up, the stable value displayed by the instrument is the ignition voltage of the discharge tube.
For continuous testing, wait until the preset voltage display value stabilizes before pressing the "Boost" key.
4.4 Other Functions
4.4.1 Self-check Function: During varistor testing, switching the "Display Switch" can check the correctness of the technical parameters of the instrument's test conditions.
4.4.2 Set the "U0.75 Selection" key to "Manual" position, adjust the "High Voltage Preset" knob to slowly increase the preset voltage. When testing varistors, switching the "Display Switch" can provide the V/A characteristic curve of the varistor; when testing the ignition voltage of discharge tubes, comparing the test value at 100V/s with the ignition value obtained by slowly increasing the preset voltage can basically determine its characteristics.
Note: The above information and technical parameters are compiled and released by Yangzhou Darui Electric Co., Ltd.
