IEEE Std ™ I. EEE Standards. TM. IEEE Guide for Field Testing of Shielded Power. Cable Systems Using Very Low. “IEEE Guide for Field Testing and Evaluation of the Insulation of Shielded Power IEEE “Guide for Testing of Shielded Power Cable Systems using Very. Guided IEEE Series (Bundle) Standards IEEE – • IEEE Guide for Field Testing of Shielded Power Cable Systems Using Very.
|Published (Last):||11 November 2013|
|PDF File Size:||18.64 Mb|
|ePub File Size:||8.76 Mb|
|Price:||Free* [*Free Regsitration Required]|
Figure 1 —Recommended test hook-up 5. A dc test set forms the high-voltage source iewe a dc-to-ac converter changes the dc voltage to the VLF ac test signal. Patents Attention is called to the possibility that implementation of this standard may require use of subject matter covered by patent rights.
VLF cable testing – Wikiwand
No work has been reported on mineral-filled EPR cables. Tables are included of the recommended test voltage levels for installation, acceptance, and maintenance tests.
Examples of the various waveforms shown in Annex B are as follows: Prior to testing, determination of safe clearances must consider both the test voltage and voltage of nearby energized equipment: Other commercially available frequencies for dielectric spectroscopy are in the range of 0.
Nor is IEEE undertaking to perform any duty owed by any other person or entity to another. In order to get the optimum performance, standards and guidelines have been developed which address the specific testing requirements for new and service-aged extruded and laminated dielectric cable insulations.
If more engineering information is required, failures during the ramp up and hold portions can be collected separately as follows: It is recommended that test procedures be followed according to IEC where possible, to aid in consistency of results.
The recommended test duration is iieee min. Table 8 —Interpretation of the slopes of the tangent delta vs. For purposes here, the term also encompasses ethylene propylene diene monomer rubber EPDM. It provides a method of evaluation, and helps to fill the need for more complete information on the cable system condition while minimizing or eliminating some potential adverse charging effects of the direct voltage high-potential test method commonly known as the dc hi-pot test Srinivas and Bernstein [B31]; Eager, et al.
Examples of condition assessment of cable systems are shown ieeee Table 7.
The converter consists of a high-voltage inductor and a switching rectifier. In this case, there is no precise agreement with the percentiles but their adoption is reasonable to enhance iewe across all insulation systems and to provide a framework for the consistent upgrading of criteria. Letters of Assurance may indicate whether the Submitter is willing or unwilling to grant licenses under patent rights without compensation or under reasonable rates, with reasonable terms and conditions that are demonstrably free of any unfair discrimination to applicants desiring to obtain such licenses.
There were no joints in the cable circuits.
A high degree of reliability and reasonable ieef expectancy of cable systems are necessary. VLF ac test voltages with cosine-rectangular and the sinusoidal wave shapes are most commonly used. Help Center Find new research papers in: A cable design using impregnated paper insulation.
During the test cycle the leakage current may be monitored and recorded. A thermoset filled or unfilled polymer used as electrical insulation in cables. By making this document available for use and adoption by public authorities and private users, the IEEE does not waive any rights in copyright to this document. Log In Sign Up. IEE LondonVol.
The test is intended to detect shipping, storage, or installation damage. Tan Delta 0 15 30 45 60 75 90 Length of cable m Figure G. The times are shown in Weibull format segregated by the action classes: There is no evidence of partial discharge see NOTE inside the water tree branches.
IEEE does not, by the publication of its standards, intend to urge action that is not in compliance with applicable laws, and these documents may not be construed as doing so. A field test conducted after cable installation but before jointing splicing or terminating or energizing.
The voltage can either be kept at this level or raised to the withstand level for 20 s to 50 s 2 cycles to 5 cycles where the PD activity is measured before being slowly reduced until the PD extinguish. Once the test lead from the VLF test equipment is connected to the cable to be tested, this safety ground can ieeee removed eiee that testing can commence.
Furthermore there are significant negative issues affecting the integrity of aged cross linked polyethylene XLPE cable after it is exposed to high-voltage dc tests and then placed back into service.
In addition, some utilities may have components connected to 400.2 cable circuit being measured, e. The values given in the tables may change as additional data are accumulated. The values in Table 4 to Table 7 were 400.22 from empirical cumulative distribution functions CDF for the data consisting of data points obtained for aged cable systems, mainly in utilities from North America, i.
Typical defects for fluid-impregnated and extruded cable systems are listed in Annex C.