IEC HV Switchgear and Controlgear. Part. 1 – 99 Generic standards. Part – Switching Devices. Part – Guidelines, reports etc. Part 9 Dec High-voltage switchgear and controlgear Part AC metal-enclosed switchgear and controlgear for rated voltages above 1 kV and up to and. IEC HIGH-VOLTAGE SWITCHGEAR AND CONTROLGEAR – PART AC METAL- ENCLOSED SWITCHGEAR AND CONTROLGEAR FOR.
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IEC – HV Switchgear And Controlgear
Significantly stricter changes have also been implemented here. The International Electrotechnical Commission IEC has taken up the task of developing the required specifications, their worldwide standardization and further development. The classification cannot be transferred to a combination with another switchgear type as each switchgear behaves differently in the case of an internal arc pressure relief equipment with different cross-sections and pickup pressures, different arcing conditions because of different conductor geometries.
In order to ;art safe access to the individual switchgear components, e. The content is copyrighted to EEP and may not be reproduced on other websites. The same applies to IEC — the new standard for medium-voltage switchgear. With a cubicletype design, the incoming cable had to be isolated, but the busbar itself could remain in operation. The classification of the substation is only valid in combination with the switchgear used for the test.
In the meantime there are tens of thousands of switchgear panels of the primary and secondary distribution level based on this standard in use — certified according to the mandatory part of the standard and, if required, according to optional tests. Temperature rise tests to verify the current carrying capacity with rated parg currents. Therefore, at the end of the nineties, the responsible IEC committees decided on the reformulation of the switchgear standard, which finally came into effect as IEC in November This resulted in the first-time use of gas insulation with the important features of climatic independence, compactness and maintenance-free design.
Instead, it is now mandatory to carry out the test in the corresponding switchgear panel. For Auto Reclosures which we 622771 to install for a 50 Hz system is it ok to accept the type test reports done in a 60 Hz laboratory???
Correspondingly important is their reliable functioning, a clearly defined switching behavior according to specified parameters as well as the protection of personnel and protection against operational interruptions when an overload occurs. Pressure and strength tests to verify the gas tightness and pressure resistance for gas-fi lled switchgear.
Hi, For Auto Reclosures which we plan to jec for a 50 Hz system is it ok to accept the type test reports done in a 60 Hz laboratory??? For the internal arc classifi cation of substations with and without control aisle, the testing of the substation with installed switchgear is mandatory in the new IEC standard. Premium Membership Isc membership gives you an access to specialized technical articles and extra premium content electrical guides and software.
Tom Burtness Sep 15, Professional in AutoCAD programming. Are there any published industry codes or standards that cover the inventory tracking, decommissioning, storage, chain of custody, disassembly, and disposal of the waste materials, etc. Leave a Comment Click here to cancel reply. This can lead to a maximum of 25 voltage impulses, whereas the maximum number of permissible disruptive discharges is still two.
Switchgears are important nodal points in modern power distribution. Degree of protection tests to verify the protection against electric shock and foreign objects.
For this reason, the test duties Ts and Ta from the IEC standard are stipulated for the 622711 of the circuitbreaker inside the switchgear panel. Therefore, with switchgear in 622271 or compartmented design, the busbar in the busbar compartment and the incoming cable in the connection compartment could remain in operation.
In contrast to the previous standard, the switching capacity test of both switching devices is no longer carried out as a pure device test.
Nadun Galloluwe Jan 29, Above all, the appearance of maintenance- free vacuum circuit-breakers, with operating cycles far exceeding the normal number, made oec access to this circuit-breaker no longer of prime importance. Division of the switchgear panel same as for metal-clad switchgear, but with the partitions between the individual compartments made of insulating material.
Iam working with Petrochina Halfaya FZ-LLC in Oart, 11KV switchgear has been installed in our oil field, now under commissioning my concerned about no earth interlocking for the rear cover can be opened without any interlocking with the earth switch which is very risky for maintenance. High-voltage switchgear and controlgear Part There is also the possibility of voluntarily certifying switchgear for resistance to internal arc faults and for personal protection.
Although the old IEC standard was very helpful, in time it was superseded by the technological progress. According to IECtwo disruptive discharges were permitted in a series of 15 voltage impulses for the test with rated 622711 impulse withstand voltage.
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Manufacturers and operators can select the criteria which are relevant to them from the following six criteria and have them tested. Four key features are of special note with the new IEC standard: Dielectric test to verify the insulation level of the switchgear tests with rated lightning impulse withstand voltage and rated short-duration power frequency withstand voltage with the specifi ed values depending on the respective rated voltage.
The energy flow direction of the arc supply, the maximum number of permissible panels with the test in the end panel and the dependency of the ceiling height on the respective panel height have been redefined. The switching capacity may get a negative infl uence from the different arrangement of the switchgear with contact arms, moving contacts, conductor bars, etc. Division of the switchgear panel into four ifc busbar compartment, switching-device compartment, connection compartment and low-voltage compartment ; partitions between the compartments made of sheet steel, pzrt plate made of sheet steel or insulating material.
All other types of construction that do not meet the above features of the metal-clad padt compartmented designs. At the same time the old IEC standard was withdrawn without any transition period. 62217 passing of the following tests was lec in order to identify switchgear as type-tested: In addition, the five following new criteria must always be completely fulfilled no exceptions are permitted:.
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The assignment is no longer according to the constructional description metalclad, compartmented or cubicle-type designbut according to operator-related criteria.
In this context, access to the then common minimum-oil-content circuit-breakers for maintenance work without longer operational interruptions was of prime importance because of the limited number of operating cycles. Vijayan Jan 18, According to the new standard, the series must be extended by another fi ve voltage impulses if a disruptive discharge has occurred during the fi rst 15 impulses.
The vacuum arc-quenching principle is technologically so superior to other arc-quenching principles that the circuit-breaker can be fixed-mounted again.
However, both technologies — the vacuum arc-quenching principle and gas insulation — were not adequately taken into account in the existing standard. AC metal-enclosed switchgear and controlgear for rated voltages above 1 kV and up to and including 52 kV.