In the field of overvoltage protection for power systems, the surge arrester discharge counter serves as a critical device for recording the number of times a surge arrester has tripped. Its reliability directly impacts the accurate collection of lightning data and the assessment of equipment condition. The surge arrester discharge counter tester is a specialized tool designed to verify whether the counter is functioning properly. Leveraging years of expertise in high-voltage testing technology, Wuhan Goldhome Hipot Electric Co., Ltd. has developed a discharge counter calibrator featuring a portable design, one-button operation, and safety and reliability, providing convenient testing solutions for power users worldwide. This article will provide a detailed explanation of how to use the Goldhome surge arrester discharge counter tester.
Overview of Working Principle
The Goldhome surge arrester discharge counter tester primarily employs the standard impulse current method for testing. Internally, the instrument uses a surge current generator to produce a standard 8/20μs, 100A surge current waveform, which is applied to the discharge counter under test. Inside the counter, a nonlinear resistor charges a capacitor; the electrical energy stored in the capacitor is then released into the inductive coil of the electromagnetic counter, triggering the counter to operate. By conducting continuous tests and observing whether the counter operates normally, its operational reliability can be determined.
Pre-Test Preparation
Safety First: Before use, ensure the instrument is properly grounded and verify that the device under test is de-energized. Operators must wear insulated gloves and conduct testing in a dry environment.
Instrument Inspection: Confirm the power supply voltage is AC 220V ±10%, 50Hz, or DC 12V (depending on the specific model), and check that the test leads are intact and undamaged. The Goldhome tester features an ABS plastic housing with no exposed metal parts at the high-voltage output points, effectively preventing electric shock accidents.
Connecting the Device Under Test: Connect the red test lead to the high-voltage terminal of the counter and the black test lead to the ground terminal of the counter. Ensure the connections are secure and make good contact.
Standard Test Procedure
The Goldhome Surge Arrester Discharge Counter Tester features a one-button operation design, making the testing process simple and intuitive:
- Step 1: Power On and Charging. Press the power switch; the instrument's built-in capacitor will begin rapid charging to the preset voltage (typically DC 1600V ±3%). Charging generally takes no more than 30 seconds. During charging, the indicator light on the control panel will display the charging status.
- Step 2: Apply impulse current. Once charging is complete, press the "Discharge" or "Test" button. The instrument will immediately apply a standard impulse current wave of ≥100A (8/20μs) to the counter under test. Observe whether the counter operates-under normal conditions, the counter should advance by at least one digit.
- Step 3: Continuous Testing and Evaluation. According to the "Regulations for Preventive Testing of Electrical Equipment," the test should be performed 3 to 5 times consecutively, and the counter should operate normally each time. If the counter fails to operate on any occasion, it indicates that internal components may be corroded or damaged, requiring disassembly, repair, or replacement.
- Step 4: Test Interval Control. The interval between each test must be no less than 30 seconds to ensure the instrument's capacitor is fully charged and to prevent cumulative effects on the counter. Goldhome testers feature a built-in automatic timer; some models allow for adjustable test intervals ranging from 1 to 8 seconds.
Post-Test Procedures
- Zero Confirmation: After testing is complete, the counter should return to zero or reset to its initial state. If it does not return to zero, it must be manually reset for the next test.
- Safety Discharge: After testing, if the output voltage has not returned to zero, the operator must not touch the non-insulated parts of the test leads. Goldhome testers feature an automatic discharge function-if no testing operation occurs within 2 minutes after charging, the remaining high voltage is automatically discharged to ensure safety.
- Disassembly and Storage: First, turn off the power, then disconnect the test leads, and finally place the instrument in its dedicated carrying case.
