I. Overview of the Equipment’s Overall Function
The insulating boots and gloves withstand voltage test device is a dedicated testing equipment specifically designed for inspecting personal insulating protective items such as insulating boots and insulating gloves. This equipment can be used in conjunction with an insulating rod withstand voltage test stand to expand the testing scope of the equipment and enable it to conduct withstand voltage tests on insulating rods and other rod-shaped insulating appliances.
This complementary combination mode fully relies on the voltage rise control and leakage current detection core functions of the original test device, without the need to add additional core equipment, effectively improving the comprehensive utilization rate of the equipment and achieving the effect of multi-purpose testing operations.
II. Electrical Test Working Principle
The entire test system relies on the mature electrical circuit principle to complete the insulation detection work. The equipment control system generates standard test signals, which are then boosted by the voltage transformer to output the required high voltage value. The high-voltage output end is reliably connected to the high-voltage electrodes of the insulating rod test stand, and the grounding electrode of the stand is connected to the overall grounding system of the equipment to form a safe and complete high-voltage test circuit.
During the test operation, the insulating rod is fixed and clamped between the high-voltage electrodes and the grounding electrodes, making the insulating rod the core subject of the test connected to the test circuit. During the system operation, the leakage current data flowing over the surface of the insulating rod can be collected and monitored in real time. Through the changes in current values and the operating status of the equipment, the insulation performance of the insulating rod can be accurately determined whether it meets the industry standard requirements.
III. Structure and Design Features of the Insulating Rod Test Stand
3.1 Overall Structure Composition
The insulating rod test stand is specially designed based on the product characteristics of insulating rods. The overall structure mainly consists of the high-voltage electrode group, the grounding electrode group, the insulating support components, and the electrode spacing adjustment mechanism. The structural layout is in line with the operational requirements of the withstand voltage test of insulating rods.
The core material of the electrode of the test stand is selected as conductive foam, which has excellent conductivity and moderate elasticity. When clamping and fixing the insulating rod, it can closely adhere to the surface of the insulating rod, ensuring the conductivity and detection effect while not causing mechanical damage such as compression or wear to the outer insulation structure of the insulating rod. At the same time, the conductive foam has good adaptability and can be compatible with various different diameter specifications of insulating rods without frequent replacement of electrode accessories, significantly simplifying the test preparation work.
3.2 Multi-position Parallel Testing Design
The current mainstream insulating rod test stands adopt a multi-independent workstation design. Common workstation specifications include eight workstations, ten workstations, and fifteen workstations, etc. Each workstation of the equipment is equipped with independent high-voltage electrodes and grounding electrodes, and each workstation has its own independent detection circuit, without mutual interference.
This structural design can support completing the detection operation of multiple insulating rods simultaneously in a single test, significantly improving the efficiency of batch tests. At the same time, the independent circuits have fault isolation functions. If a single insulating rod fails in the test process due to breakdown, the system can automatically cut off the faulty workstation without affecting the normal test process of the other workstations’ insulating rods, ensuring the orderly conduct of the overall test.
3.3 Precise Spacing Adjustment Design
The accuracy of electrode spacing adjustment and the safety of operation are the core performance indicators of the stand. The traditional manual adjustment method requires the operator to approach the high-voltage operation area closely, which poses a significant safety hazard.
Modern insulating rod test stands generally adopt an electrically remote-controlled adjustment mode. The operator can control the movement of the electrodes through a wireless remote controller from a safe distance. The stand is equipped with a high-precision scale, which can provide precise data reference for electrode spacing adjustment, ensuring the adjustment accuracy of the test spacing, completely avoiding the safety risks of close-range high-voltage operation, and significantly enhancing the safety and accuracy of the operation and test.
IV. Insulating Rod Withstand Voltage Test Method and Standard Operating Procedure
4.1 Test Sample Installation and Spacing Adjustment
Before conducting the withstand voltage test of the insulating rod, the test sample is installed and fixed. The operator activates the self-locking mechanism of the support electrode, places the insulating rod to be tested smoothly into the conductive foam slot, locks the self-locking mechanism, ensuring that the electrode and the surface of the insulating rod are fully adhered and in good contact, to avoid adverse effects on the test data due to poor contact.
According to the rated voltage level of the insulating rod, the distance between the high-voltage electrode and the grounding electrode is adjusted through the wireless remote control device. This distance is the standard test length, and it must strictly follow industry regulations and standards. For example, the standard test length for an insulating rod of 10kV level is 700mm, and for a 35kV level insulating rod, it is 900mm.
4.2 Setting of Test Parameters
After the test sample installation and spacing adjustment are completed, the corresponding test parameters are set on the control panel of the test device. The core parameters include the target test voltage, the duration of the withstand voltage test, and the parameters must strictly match the voltage level standard of the insulating rod. The conventional test standard is: for a 10kV insulating rod, the power frequency withstand voltage test voltage is 45kV, and the duration is 1 minute; for a 35kV insulating rod, the power frequency withstand voltage test voltage is 95kV, and the duration is 1 minute.
4.3 Voltage Rise Test and Real-time Monitoring
After the parameter settings are completed, the test program is started, and the equipment control system automatically rises the voltage smoothly. The voltage gradually rises to the preset standard value, and then the system automatically enters the withstand voltage timing stage.
During the entire test process, the equipment display screen can synchronously show the overall test voltage, leakage current at each independent workstation, and other core data. The operator can directly view the insulation operation status of each insulating rod under high-voltage conditions and grasp the test progress and performance of the test sample in real time.
4.4 Test Conclusion and Qualification Determination
After the withstand voltage timing is completed, the system automatically completes the voltage reduction and zeroing operations, and the test process is terminated. The operator determines the qualification of the insulating rod based on the leakage current data throughout the process and the status of the test sample.
The determination standard is: if the leakage current at each workstation is controlled within the regulations within the range, and the insulating rod has no breakdown, flashover, or other abnormal phenomena, the insulating rod is determined to be qualified. If there is an excessive leakage current, breakdown of the insulating rod, or other faults, the system will automatically trigger an alarm, and mark the data of the faulty workstation specially. The operator can quickly identify and eliminate the unqualified test samples.
Post time: Jun-11-2026