IEC Edition INTERNATIONAL. STANDARD. NORME. INTERNATIONALE. Surge arresters –. Part 4: Metal-oxide surge arresters without . 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. Standards: IEC and IS ”. (19th January ). Organized by. HIGH VOLTAGE DIVISION. Central Power Research Institute. (Govt. of India.

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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. Consult with your Cooper representative to have your individual system application needs studied. The fair was held ifc 23 to 27 April Edison Technical Center and their systems application engineers are available to make recommendations.

Gapless surge arresters must be selected with sufficient steady-state self impedance to withstand the application of line-to-earth power frequency voltages under all system conditions of operation. PKI – post insulators They have an innovative insulating head with integrated conductor clamping system.

Using Metal Oxide Varistors MOVs having excellent electrical properties, these arresters provide superior overvoltage protection for MV distribution systems. This website uses cookies to ensure you get the best experience on our website. We are particularly pleased by the 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.

In the company, we are eic that such fairs represent the beginning of concluding new deals on foreign markets, which is also our main goal.

Under some special system conditions, such as transformer energization using certain types of connections and ferroresonance, higher voltages can be experienced by the arrester. 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.


Most contain our own built-in innovative patented solutions.

Our showroom A41 was isc Hall The UltraSIL housed surge arrester incorporates the industry recognized superior polymeric material — silicone rubber. The fair also presents an opportunity to deepen existing contacts.

IEC System of Conformity Assessment Schemes

The second application 600999 to be met is a condition established by the effectiveness of system grounding. 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.

Our company was also an exhibitor this year at the world’s largest energy fair in Hanover. The disconnector will sense and disconnect the ground terminal in the unlikely event of arrester failure, preventing a permanent system short circuit.

The fair fulfilled our expectations. The voltage withstand capability application on ungrounded systems is 1.

A disconnector that has operated gives a visual indication of internal arrester damage and the need for arrester replacement. Electricity distribution companies from more than 40 countries worldwide already made the decision to trust the iex and technology of our company.

Manufacturing our own MOV disks allows strict quality control over the manufacturing process from start to finish. LV surge arresters They have IP67 protection which ensures reliable operation in all environments. Learn more about cookies. To ensure that the arrester’s capabilities will not be exceeded, the resources of the Thomas A.

Table 1 in Catalog Section I provides a general application guide for the selection of the proper arrester rating for a given system voltage and system grounding configuration. Email or password incorrect.

NKI – tension insulators

Power-Frequency Overvoltages The second application criterion to be met is a condition established by the effectiveness of system grounding. After production, every MOV disk must pass a series of electrical tests designed to ensure the highest individual disk quality.


Also, such a fair allows us to understand and analyze the competition. UltraSIL silicone rubber iiec not support biological growth algae and mildew and is non-flammable. 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.

In the public tender “Incentives for research and development projects 2” we received grants for “Development of a system for monitoring the functionality of surge arresters”.

Our most important products are low and medium voltage surge arresters and medium voltage insulators. These MOV disks have proven their reliability and protective abilities through years of in-service use.

In our production is already for 9 months fully implemented the collaborative robot UR5 from the Danish company Universal Robots.

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A ground lead disconnector is optionally available for use on systems having 20A or more of available fault current.

The number of visitors and established business contacts is in line with expectations. Accessories for overhead networks We produce different patented accessories for MV power lines.

The rating of an arrester is 600999 maximum power frequency 600099 voltage at which the arrester is designed to pass the IEC operating duty test. 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 Our tension insulators have specified mechanical load 90 kN.

The advantages of polymer housed arresters — reduced size and weight, and enhanced safety — have been refined in this new generation of surge arresters: Check video at https: One must pay particular attention ic systems having low coefficients of grounding, ungrounded systems and systems that are resonant grounded or that may become ungrounded under abnormal conditions of operation.