The vacuum degree of a vacuum switch is a core indicator for evaluating its arc-extinguishing capability and insulation performance. Regular testing with a vacuum degree tester is a key measure to ensure the safe operation of the power system. The following is a detailed summary of its application scenarios and key points for selection:
I. Main Application Scenarios
This equipment is mainly used for quantitative measurement of the vacuum degree inside vacuum interrupters. Its core value lies in the ability to conduct on-site testing without disassembling the vacuum switch, significantly enhancing the testing efficiency. Its specific applications cover the entire life cycle management of power equipment, as follows:
1. Preventive tests in power systems: Regular inspection of in-service vacuum circuit breakers and contactors to detect potential vacuum degradation in advance.
2. Installation and acceptance of equipment: Testing the initial vacuum degree of new vacuum switches or those that have been repaired and are about to be put back into operation to ensure they are in good condition.
3. Fault diagnosis and condition-based maintenance: When a switch malfunctions, it is used to quickly determine if the problem is caused by insufficient vacuum; long-term data tracking provides a scientific basis for maintenance planning.
4. Production and quality control: Used in the production lines of vacuum interrupters and switchgear for quality control before leaving the factory.
5. Other industrial fields: Widely used in industries such as railways, steel, petrochemicals, coal, and textiles, where vacuum switches are extensively used, to ensure the reliable operation of internal distribution networks.
II. Key Points for Selecting a Vacuum Switch Vacuum Degree Tester
There are numerous product models on the market. When making a purchase, it is recommended to focus on the following core aspects:
(1) Core technical principle
Most products are based on the magnetic control discharge method. Prefer those that use ionization charge sampling technology, as they offer higher measurement accuracy.
(2) Key performance parameters
1. Measurement range and accuracy: At least should cover 10⁻⁵ Pa to 10⁻¹ Pa, which is the core range for evaluating vacuum conditions; accuracy should be no less than ±15%, with some high-quality products reaching ±5% or ±10%.
2. Output voltage capability: Check the output capabilities of the electric field high voltage (typically 30kV) and magnetic field voltage (typically 1600V-1800V), as this determines whether the conditions required for testing can be effectively generated.
(3) Core functions and ease of use
1. Non-disassembly measurement: This is a basic requirement, ensuring that testing can be completed without disassembling the switch.
2. Intelligence and data management: Equipped with a Chinese LCD display, data storage, printing, and RS232/USB communication functions, facilitating on-site operation and post-test data analysis.
3. Tube type adaptability: Different types of vacuum interrupters (such as ceramic and glass tubes) have different diameters, which affects the coupling efficiency of the test coil. When selecting, confirm whether the instrument has a rich database of tube types or supports user-defined calibration curves.
(4) Service guarantee
Pay attention to whether the provider offers operation training, regular calibration, and after-sales maintenance services, which are crucial for the long-term use of the equipment.
Post time: Apr-08-2026