IEC. First edition. Surge arresters –. Part 6: Surge arresters containing both series and parallel gapped structures –. Rated 52 kV and less. This part of International Standard IEC applies to surge protective devices designed for repeated operation to limit voltage surges on a.c. power circuits. This part of IEC applies to non-linear metal-oxide resistor type surge arresters without spark gaps designed to limit voltage surges on a.c. power circuits.
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Our most important products are low and medium voltage surge arresters and medium voltage insulators. A ground lead disconnector is optionally available for use on systems having 20A or more of available fault current.
After production, every Iex disk must pass a series of electrical tests designed to ensure the highest individual disk quality. In the company, we are aware that such fairs represent the beginning of concluding new deals on foreign markets, which is also our main goal.
Surge arresters – Part 8: The voltage withstand capability application on ungrounded systems is 1. PKI – post insulators They have an innovative insulating head with integrated conductor clamping system.
Metal-oxide surge arresters with external series gap EGLA for overhead transmission and distribution lines of a.
We are particularly pleased by 06099 visit of this fair because we carried out some business talks with potential customers with whom we met at the Hanover Messe fair in previous years. Using Metal Oxide Varistors MOVs having excellent electrical properties, these arresters provide superior overvoltage protection for MV distribution systems.
IEC System of Conformity Assessment Schemes
Also, such a fair allows us to understand and analyze the competition. Check video 600999 https: Independent laboratory tests have verified the superiority of silicone rubber in terms of hydrophobicity, resistance to UV and surface tracking performance in contaminated environments, chemical inertness, temperature stability and other key insulating properties. Valid Estimated date of Estonian translation publication: A disconnector that has operated gives a visual indication of internal arrester damage and the need for arrester replacement.
In addition, long term environmental testing has verified the lifetime superiority of UltraSIL silicone rubber when compared to other polymeric insulating materials.
NKI – tension insulators
These MOV disks have proven their reliability and protective abilities through years of in-service use. Learn more about cookies.
Our company was also an exhibitor this year at the world’s largest energy fair in Hanover.
In addition to testing to evaluate the performance of the MO resistors, procedures for evaluating the performance of the EGLA series gaps have been introduced. Consider the permissible magnitude and duration of these overvoltages including the full time of system back-up protectionwith appropriate allowances for any recent arrester discharge energies.
Surge Arresters 5 kA and 10 kA Class 1 IEC for MV Systems to 36 kV
Most contain our own built-in innovative patented solutions. Considering the particular design concept and the special application on overhead transmission and distribution lines, some unique requirements and tests are introduced, such as the verification test for coordination between insulator withstand and EGLA protective level, the follow current interrupting test, mechanical load tests, etc.
The disconnector will sense and disconnect the ground terminal in the unlikely event of arrester failure, preventing a permanent system short circuit. UltraSIL silicone rubber will not support biological growth algae and mildew and is non-flammable. This second edition cancels and replaces the first edition published in Power-Frequency Overvoltages The second application criterion to be met is a condition established by the effectiveness of system grounding.
Accessories for overhead networks We produce different patented accessories for MV power lines. Full text browsing Price: The fair was held from 23 to 27 April Consult with your Cooper representative to have your individual system application needs studied.
To ensure that the arrester’s capabilities will not be exceeded, the resources of the Thomas A.
EVS-EN IEC – Estonian Centre for Standardisation
Manufacturing our own MOV disks allows strict quality control over the manufacturing process from start to finish. One must pay particular attention to systems having low coefficients of grounding, ungrounded systems and systems that are resonant grounded or that may become ungrounded under abnormal conditions of operation. Systems which permit earth faults to remain undetected or operate with one phase earthed for periods in excess of 24 hours will require the use of an arrester having a Uc continuous capability equal to the system maximum phase-to-phase voltage.
The motive for the participation in the Hanover fair was to establish new contacts with potential partners or representatives of companies that market equipment for power systems.