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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Facebook Linkedin Google Plus Twitter. The classification cannot be transferred to a combination with another switchgear type as each switchgear behaves pat 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.
Division of the switchgear panel into four compartments busbar compartment, switching-device compartment, connection compartment and low-voltage compartment ; partitions between the compartments made of sheet steel, front plate made of sheet steel or paet material. Therefore, with switchgear in metalclad or compartmented design, the busbar in the busbar compartment and the incoming cable in the connection compartment could remain in operation.
In order to guarantee safe access to the individual switchgear components, e.
Temperature rise tests to verify the current carrying capacity with rated normal currents. Professional in AutoCAD programming.
Nadun Galloluwe Jan 29, For Auto Reclosures which we plan to install for a 50 Hz system is it ok to accept the type test reports done in a 60 Hz laboratory??? The International Electrotechnical Commission IEC has taken up the task of developing the required specifications, their worldwide standardization and further development.
Significantly stricter changes have also been implemented here. Switchgears are important nodal points in modern power distribution. Instead, it is now mandatory to carry out the test in the corresponding switchgear panel.
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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. The assignment is no longer according to the constructional description metalclad, compartmented or cubicle-type designbut according to operator-related criteria. Pressure and strength tests to verify the gas tightness and pressure resistance for gas-fi lled switchgear.
Peak and short-time withstand current tests to verify the dynamic and thermal current carrying capacity of the main and earth circuits; the tests are performed with rated peak short-circuit current or rated short-circuit making current or rated shorttime current or rated short-circuit breaking current.
Therefore, at the 200 of the nineties, the responsible IEC committees decided on the reformulation of the switchgear standard, which finally came into effect as IEC in November With a cubicletype design, the incoming cable had to be isolated, but the busbar itself could remain in operation. 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.
For this reason, the test duties Ts and Ta from the IEC standard are stipulated for the test of the circuitbreaker inside the switchgear panel. According to the new standard, the series must parh extended by another fi ve voltage impulses if a disruptive 6221 has occurred during the fi rst 15 impulses. 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 ief ed values depending on the respective rated voltage.
However, both technologies — the vacuum arc-quenching principle and gas insulation — were not adequately taken into account in the existing standard. The same applies to IEC — the new standard parf medium-voltage switchgear. In the meantime there are tens of thousands of switchgear panels of irc 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.
The vacuum arc-quenching principle is technologically so superior to other arc-quenching principles that the circuit-breaker can be fixed-mounted again. 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. 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.
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The classification of the substation is only valid in combination with the switchgear used for the test. In addition, the five following new criteria must always be completely fulfilled no exceptions are permitted:. 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 lightning impulse withstand voltage.
High-voltage switchgear and controlgear Part The passing of the following tests was obligatory in order to identify switchgear as type-tested: