Verification Results of Leakage Current Test Based on Our Standards

A verification test was conducted to confirm that no leakage current occurs from the installed battery terminal cover when a high direct current is applied to the battery terminal.

Test Location	Saitama Industrial Technology Center (SAITEC)
Test Method	Conductive copper foil was applied to the entire surface of the test sample, and a negative electrode was connected. Test voltage was applied.

Equipment Manufacturer	KIKUSUI ELECTRONICS CORP
Model Number	AC/DC Withstanding Voltage Tester: TOS5101

Test Voltage

Applied Voltage	AC or DC 0–10kV

AC Specification

Maximum Rated Output (at Nominal Power Supply Voltage)	500VA/10kV・50mA
Waveform	Commercial Power Supply Waveform
Voltage Fluctuation Rate (at Nominal Power Supply Voltage)	Within 15% (From Maximum Rated Load to No Load)
Switching	Zero-cross Switch Used

DC Specification

Maximum Rated Output (at Nominal Power Supply Voltage)	50W/10kV・5mA
Ripple	Approx. 100Vp-p at 10kV No Load / Approx. 200Vp-p at Maximum Rated Output
Voltage Fluctuation Rate (at Nominal Power Supply Voltage)	Within 15% (From Maximum Rated Load to No Load)
Switching	Within 3% (From Maximum Rated Load to No Load)

Output Voltmeter

Analog	Scale	AC/DC Shared, 10kV Full Scale
	Accuracy Class of Instrument Used	JIS Class 2.5
	Measurement Accuracy	±5% f.s
	AC Indicator	Average Response Measurement, RMS Calibrated Scale
Digital	Full Scale	5kV/10kV f.s
	Measurement Accuracy	±1.5% f.s
	AC Response	Average Response Measurement, RMS Display Calibration

Ammeter

Digital	Measurement Accuracy	±(5% + 20μA) of Upper Limit Reference Value
	AC Response	Average Response Measurement, RMS Display Calibration

Dedicated Terminal Cover for Oxygen-Free Copper (OFC) Battery Terminals
Parts No.: DVCP60
Material: PVC (Polyvinyl Chloride) Wall Thickness: 2.0 mm (Dimensional Tolerance: ±0.5 mm)

Although batteries installed in automobiles and similar vehicles typically operate at 12V or 24V, this test deliberately applied a high DC voltage of 1,000V to verify whether any leakage current would occur externally from the battery terminal cover.

In this test method, the entire surface of the battery terminal cover (test sample) was covered with conductive copper foil tape. The cover was then mounted onto a battery terminal that had been crimped to a 60sq cable. A DC voltage of 1,000V (1kV) was applied for one minute between the cable and the copper foil on the cover to determine whether any leakage current would occur from the cover.

(Note: The applied voltage and duration in this test were determined independently by our company and are not based on any external standards.)

As shown in the photo on the right, even after DC 1.00kV was applied (left-side value on the tester display) for approximately one minute (right-side value), the leakage current remained at 0.00mA (center value), confirming that there was no external leakage current from the battery terminal cover. The target application time was one minute.

This test was conducted under voltage conditions far beyond those encountered in normal use. Since our similar battery terminal covers are made from the same material and have equivalent wall thickness, they can also be considered to possess sufficient dielectric strength.

Dedicated Terminal Cover for Oxygen-Free Copper (OFC) Battery Terminals	Leakage Current Value
Test Voltage: DC 1,000V Test Duration: 1 Minute	No Abnormalities (0.00mA)