By hvhipot 
In the power system, high-voltage switches are the “gatekeepers” to ensure the safe and reliable transmission of electricity. They are responsible for frequent closing and opening tasks, and have to face extremely high voltage and current. How do we know if these ‘goalkeepers’ are always in their best condition? This requires our protagonist today – the comprehensive characteristic tester for high-voltage switches, which is like the “universal inspector” for high-voltage switches, capable of evaluating multiple key performance indicators at once.
What are the “secrets” included in “comprehensive characteristics”?
The term ‘comprehensive characteristics’ may sound a bit mysterious, but it actually includes several core indicators of high-voltage switch operation:
Closing/opening time: This is the key to measuring the speed of switch action. The faster the better, it can effectively reduce the duration of the arc and minimize contact burnout.
Bounce time: During the process of closing or opening the switch, the contact will experience several small jumps, and this time also needs to be controlled within a certain range. Being too long or too short is not conducive to stable operation.
Three phases in different stages: Whether the contact action time of the three phase lines is consistent is an important factor affecting the stable operation of the power system.
Insulation resistance: Ensure that the switch has sufficient insulation capacity between the contacts in the open state to prevent leakage.
Contact resistance: When the switch is closed, the smaller the resistance between the contacts, the better, which can reduce energy loss and heat generation.
What are the factors that affect the ‘physical examination results’?
The comprehensive characteristics of a high-voltage switch are not fixed, and many factors can affect its “physical examination results”:
The design and manufacturing process of the switch itself: this is the most fundamental.
Operating environment: Temperature, humidity, altitude, etc. can all affect the performance of the switch.
Service life and maintenance condition: Just like humans, if used for too long or not properly maintained, performance will naturally decline.
The condition of the operating mechanism: whether the spring energy storage, hydraulic system, etc. are working properly directly affects the accuracy of the action.
The ‘secret weapon’ of the ‘omnipotent physical examination officer’ – testing device
How can we conveniently and quickly detect these characteristics? The high-voltage switch comprehensive characteristic tester produced by HV Hipot Electric Co., Ltd. is your best choice. This type of instrument integrates multiple testing functions and can complete various performance tests of high-voltage switches at once, greatly improving work efficiency.
How to better “check” high-voltage switches?
To obtain accurate and reliable test results, the following points should also be noted:
Select appropriate testing methods and parameter settings: Choose the most suitable testing mode based on the switch model and actual situation.
Ensure the stability of the testing environment: Avoid testing in extreme weather or interference environments.
Regular instrument calibration: Ensure the accuracy of the testing instrument itself.
Combining on-site operational experience for analysis: Simple test data needs to be combined with actual operating conditions in order to make the most accurate judgment. HV Hipot Electric Co., Ltd. has rich experience in this field and can provide professional support.
Frequently Asked Questions (FAQ)
Q: What scenarios is the high-voltage switch comprehensive characteristic tester mainly used for? A: Mainly used in power substations, power plants, high-voltage lines and other places, for factory acceptance, regular maintenance and fault diagnosis of high-voltage switchgear.
Q: Do we need to power off during the testing process? A: Yes, for safe and accurate testing, it must be conducted with the switchgear powered off and isolated.
Q: Why do test data sometimes get abnormal? A: Possible reasons may include aging, damage, internal structural failures of the switchgear itself, or accuracy issues with the testing instrument itself, incorrect wiring, etc.
Q: What are the advantages of the testing equipment of HV Hipot Electric Co., Ltd? A: The high-voltage switch comprehensive characteristic tester of HV Hipot Electric Co., Ltd. has significant advantages in accuracy, reliability, ease of operation, and automation level, and provides comprehensive after-sales service.
Q: Will the testing method be the same for different high-voltage switches? A: The basic principles are the same, but there may be differences in the specific testing parameter settings and testing project focus for different types and voltage levels of switches.