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Guangxi has recently purchased our MCBP-50 overvoltage protection tester!
Release time:
2020-10-27
The overvoltage protection tester is a new type of overvoltage protection device used in power systems. Three-phase combined overvoltage protectors have been widely deployed in power systems with voltages of 35 kV and below to limit lightning-induced overvoltages, switching overvoltages caused by vacuum circuit breakers, and various transient overvoltages that may occur in the power system. These devices effectively safeguard the insulation of power equipment such as motors, transformers, switchgear, capacitors, cables, and busbars from damage, providing reliable suppression of both interphase and phase-to-ground overvoltages—capabilities that traditional surge arresters lack.
Guangxi has recently purchased our MCBP-50 overvoltage protection tester!
The overvoltage protection tester is a new type of overvoltage protection device used in power systems. Three-phase combined overvoltage protectors have been widely deployed in power systems with voltages of 35 kV and below to limit lightning-induced overvoltages, switching overvoltages caused by vacuum circuit breakers, and various transient overvoltages that may occur in the power system. These devices effectively safeguard the insulation of power equipment such as motors, transformers, switchgear, capacitors, cables, and busbars from damage, providing reliable suppression of both interphase and phase-to-ground overvoltages—capabilities that traditional surge arresters lack.
The testing of overvoltage protectors shall comply with the requirements for surge arrester testing as specified in Part 5 of the On-site Insulation Test Implementation Guidelines, DL/T 474.5-2006.
Three-phase combined overvoltage protectors are mainly classified into two major types: those with series gaps and those without gaps. The test procedures for each type require the use of high-voltage power-frequency AC and high-voltage DC power supplies, respectively, necessitating one set of DC high-voltage testing equipment and one set of AC withstand voltage testing equipment. These systems are bulky, comprise numerous components, and require a 220 V power supply at the test site to operate. Moreover, the wiring and testing procedures are relatively complex, resulting in low operational efficiency.
Currently, no dedicated instrument is available in China that can comprehensively test both gap-type and gapless overvoltage protectors. To address this gap, our company has developed a comprehensive testing device for three-phase combined overvoltage protectors, suitable for voltage levels of 10 kV and below. This device is designed for the commissioning and testing of such protectors, with the aim of promptly identifying hazardous defects such as internal insulation moisture absorption and valve element aging.
1. The instrument host is housed in a high-strength, highly insulating, wear-resistant hard-plastic sealed enclosure, featuring an aesthetically pleasing appearance, robust durability, excellent shock resistance, a high insulation class, and convenient on-site portability.
2. The instrument can be powered directly by 220 V mains electricity (the rechargeable model can also be powered by its built-in high-capacity rechargeable battery, providing continuous operation for more than 8 hours), thereby meeting the needs of various field testing environments.
3. Thoughtful Safety Design: The instrument is equipped with a high-voltage output switch; the high-voltage output circuit can only be activated when the switch is set to “OUT,” effectively preventing accidental high-voltage output due to operator error and thereby mitigating the risk of injury to test personnel. Furthermore, once high voltage is applied, the instrument immediately triggers an audible and visual alarm, providing clear and reliable alerts to on-site operators.
4. The instrument host is equipped with a built-in 32-bit high-speed processor, providing powerful data-processing capabilities.
5. Fully Chinese simplified LCD display, with a user-friendly human-machine interface and simple, intuitive operation.
6. The instrument offers comprehensive functionality and flexible configuration: the main unit can directly output DC high voltage for testing gapless three-phase overvoltage protectors and zinc oxide surge arresters, or it can be equipped with a test transformer for power-frequency discharge voltage tests of gap-type overvoltage protectors. With a single set of equipment, all common testing procedures for overvoltage protectors can be completed.
7. The test parameters include the AC operating voltage test for series-gap surge arresters and the DC 1 mA reference voltage test for gapless surge arresters and zinc oxide surge arresters, with reliable data and high accuracy.
8. The accessories are fully equipped, meeting the on-site testing requirements for various overvoltage protectors.
More News
A customer in Shanxi has purchased one set of our MCYZ-308 zinc oxide surge arrester tester!
The live-testing instrument for zinc oxide surge arresters is used to evaluate the electrical performance of each phase of a zinc oxide surge arrester (MOA). This instrument is suitable for on-site live testing of zinc oxide surge arresters across all voltage levels, as well as for factory and acceptance tests conducted in the laboratory under de-energized conditions. By measuring parameters such as total current and resistive current, it can promptly detect hazardous defects, including internal insulation moisture absorption and valve element aging, in zinc oxide surge arresters.
2020-07-16
This model features extensive and sophisticated user-customization capabilities. It is equipped with a built-in isolated, adjustable DC power supply and a switch-operation-command simulation control module, enabling direct control of switch opening, closing, and reclosing operations during testing via the included DC power supply. It also supports both automatic and manual operation voltage testing.
2020-07-21
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