Buy IEC OVERHEAD LINES - REQUIREMENTS AND TESTS FOR STOCKBRIDGE TYPE AEOLIAN VIBRATION DAMPERS from SAI Global. Modelling of aeolian vibrations of single conductors- assessment of technology. Electra N° IEC Standard 'Requirements and tests for stockbridge . line in Jiangmen, a city in southern China and IEC standard,. Aeolian vibration .. Aeolian Vibration Dampers, IEC Standard ,  Overhead Lines— .
|Language:||English, Spanish, French|
|Genre:||Health & Fitness|
|ePub File Size:||20.78 MB|
|PDF File Size:||15.27 MB|
|Distribution:||Free* [*Sign up for free]|
This International Standard applies to Stockbridge type aeolian vibration dampers intended for single conductors or earth wires or conductor bundles where dampers are directly attached to each subconductor. The purchaser adopt part(s) of this standard when specifying. SS-EN Overhead lines - Requirements and tests for. Stockbridge type aeolian vibration dampers. SS-EN ISO Hot dip galvanized. Type test report according to IEC (acc. to par 7 in this spec.) IEC – Requirements and tests for stockbridge type dampers.
The dates listed in parentheses are for information only. Addresses conditions for machinery mounting that directly affects shaft alignment, methods for measuring amount of shaft misalignment, and practices for relocating machine cases to achieve proper shaft alignment. Included are performance tests intended to evaluate resistance to smoke and air infiltration, energy performance, acoustic properties, and the life and durability of gasketing materials. Early notification of activity intended to reaffirm or withdraw an ANS is optional. The mechanism by which such notification is given is referred to as the PINS process. For additional information, see clause 2. Measurements are made using a simulated real ear on a manikin fitted with an earmold.
This involves using measurement methods appropriate to noise emission assessment at locations close to the machine, in order to avoid errors due to sound propagation, but far enough away to allow for the finite source size. The procedures described are different in some respects from those that would be adopted for noise assessment in community noise studies. They are intended to facilitate characterization of wind turbine noise with respect to a range of wind speeds and directions.
Standardization of measurement procedures will also facilitate comparisons between different wind turbines. The procedures present methodologies that will enable the noise emissions of a single wind turbine to be characterized in a consistent and accurate manner. These procedures include the following: location of acoustic measurement positions; requirements for the acquisition of acoustic, meteorological, and associated wind turbine operational data; analysis of the data obtained and the content for the data report; and definition of specific acoustic emission parameters, and associated descriptors which are used for making environmental assessments.
The standard is not restricted to wind turbines of a particular size or type. The procedures described in this standard allow for the thorough description of the noise emission from a wind turbine. If, in some cases, less comprehensive measurements are needed, such measurements are made according to the relevant parts of this standard. The dates listed in parentheses are for information only.
Addresses conditions for machinery mounting that directly affects shaft alignment, methods for measuring amount of shaft misalignment, and practices for relocating machine cases to achieve proper shaft alignment. Included are performance tests intended to evaluate resistance to smoke and air infiltration, energy performance, acoustic properties, and the life and durability of gasketing materials.
Early notification of activity intended to reaffirm or withdraw an ANS is optional. The mechanism by which such notification is given is referred to as the PINS process.
For additional information, see clause 2. Measurements are made using a simulated real ear on a manikin fitted with an earmold. Standardized audiograms are used representing an increasing degree of hearing loss.
Acoustic test stimuli are provided and measurements are performed using a setup without reflective surfaces near manikin and another setup simulating use of a telephone handset close to manikin ear.
A description of the pendulum parts, tests carried out and the final design are presented. Mainly, there are four categories of protection methods Index Terms-- damper, galloping, live-line, pendulum, test against galloping: - Mechanical or electrical removal of the ice on the conductors or even the prevention of the ice formation on I.
Their frequencies are in the range of 0. Usually, the galloping occurs in the adoption of increased clearances between phases or from conditions of moderately strong, steady wind acting upon an phases to the shieldwires, asymmetrically iced conductor surface. The wind direction causing the galloping has to be more than to the line axis.
Their characteristics, advantages and disadvantages are very distance between the pendulum weight center and the phase well described in the mentioned brochure.
The widely used axis. Since the best behavior was shown by the 0. The most important parts are Fig. The pendulum rigid spacers are fixed bundle interacts with the vertical motion. The wind energy on the armour rod protected subconductors pos.
To A very important matter was that of the best stuff to be may avoid the frequency coalescence between torsion and used for the damper manufacturing, to may achieve the best vertical movement, causing the instability, it is very important damping properties of the pendulum. Two types of TDD 2. The final design was based on the preliminary design done The torsional damper and detuner TDD combines the by Dr.
Vinogradov from ESSP, Moscow, Russia properties of torsional damping with those of detuning, and on the mathematical simulations of the galloping without avoiding the energy transfer from the torsion to the vertical and with pendulums done by Prof. Jean-Luis Lilien from motion. Further, starting from , new types were developed 8.
In the type 2. The design was further improved and detailed by the Romanian team in charge, under Dr.
Vinogradov supervision. These were installed on a section of the kV Isaccea- Tulcea overhead line. Further, in , other pcs were manufactured and installed on two other kV lines in Romania.
The design and the type tests were ready in the autumn of The axonometric drawing of the pendulum The main design parameters of TDD are: the torsion rigidity, the damping properties of the elastomeric units, the pendulum inertial momentum around the fixing point and the logarithmical decrement.
The results are shown in the diagrams of the Fig. Figure 4.