48 v input power cable
QĐ 48 v/v ĐG-XL CMNV GV tiểu học
Ngày tải lên :
17/08/2013, 23:10
... giá, xếp loại chuyên môn - nghiệp v giáo viên tiểu học nhiệm v cấp quản lý giáo dục, nhằm quản lý động viên, giúp đỡ giáo viên tiểu học phấn đấu thực tốt nhiệm v giảng dạy giáo dục, góp phần ... nghiệp v giáo viên tiểu học bao gồm kết thực nhiệm v phân công giảng dạy, giáo dục kết đánh giá tiết dạy giáo viên tiểu học Điều Kết thực nhiệm v phân công giảng dạy giáo dục giáo viên tiểu ... hành lần v o cuối học kỳ II Điều Tổ chức đánh giá, công nhận giáo viên dạy giỏi cấp 5 Giáo viên đạt loại tốt chuyên môn nghiệp v cấp trường công nhận giáo viên dạy giỏi cấp trường Giáo viên dạy...
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QĐ 48 v/v ĐGXL CMNV GV Tiểu học
Ngày tải lên :
17/08/2013, 23:10
... giá, xếp loại chuyên môn - nghiệp v giáo viên tiểu học nhiệm v cấp quản lý giáo dục, nhằm quản lý động viên, giúp đỡ giáo viên tiểu học phấn đấu thực tốt nhiệm v giảng dạy giáo dục, góp phần ... nghiệp v giáo viên tiểu học bao gồm kết thực nhiệm v phân công giảng dạy, giáo dục kết đánh giá tiết dạy giáo viên tiểu học Điều Kết thực nhiệm v phân công giảng dạy giáo dục giáo viên tiểu ... hành lần v o cuối học kỳ II Điều Tổ chức đánh giá, công nhận giáo viên dạy giỏi cấp 5 Giáo viên đạt loại tốt chuyên môn nghiệp v cấp trường công nhận giáo viên dạy giỏi cấp trường Giáo viên dạy...
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Hacking Credit Card – Sql Blind V.1 (Power by Tieuquainho)
Ngày tải lên :
21/10/2013, 23:20
... Provider for SQL Server error '80040e07' Syntax error converting the varchar value '2005HCP' to a column of data type int /shop/shop$db.asp, line 409 V y hack thằng hihi dễ phải không bạn Hy v ng ... ieldname%20from%20configuration%20where%20left(fieldname,10)='xadminpage'%20 and%20left(fieldvalue,1)='s') Microsoft OLE DB Provider for SQL Server error '80040e07' Syntax error converting the varchar value 'xadminpage' to a column of data type ... SCHEMATA TABLE_CONSTRAINTS TABLE_PRIVILEGES TABLES VIEW_COLUMN_USAGE VIEW_TABLE_USAGE VIEWS V cách tìm kiếm tốn nhiều công sức, phải tìm đầy đủ table nó, mà v i kiểu hack đoán mò table, blind...
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iec 60502-1 power cables with extruded insulation and their accessories for rated voltages
Ngày tải lên :
25/12/2013, 11:08
... kV (Um = 1,2 kV) up to 30 kV (Um = 36 kV) Part 1: Cables for rated voltages of kV (Um = 1,2 kV) and kV (Um = 3,6 kV) IEC 2004 Droits de reproduction rộservộs Copyright - all rights reserved ... POWER CABLES WITH EXTRUDED INSULATION AND THEIR ACCESSORIES FOR RATED VOLTAGES FROM kV (Um = 1,2 kV) UP TO 30 kV (Um = 36 kV) Part 1: Cables for rated voltages of kV (Um = 1,2 kV) and kV (Um ... 15 POWER CABLES WITH EXTRUDED INSULATION AND THEIR ACCESSORIES FOR RATED VOLTAGES FROM kV (Um = 1,2 kV) UP TO 30 kV (Um = 36 kV) Part 1: Cables for rated voltages of kV (Um = 1,2 kV) and kV (Um...
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Electrical power cable engineering
Ngày tải lên :
01/01/2014, 01:29
... 600 Volt and kV Cable W l s If we use the same al volts per mil wall thickness of 600 volt cable to determine higher voltage walls, we achieve a wall of at least 4.6 inches (1 17 mm) for a 35 kV ... these cables became available for smoother and cleaner conductor shields Vast improvements in the materials and processing of extruded, medium voltage power cables in the 1980s has led to cables ... Medium Voltage Sbielded Cables M d u voltage (5 kV to 46 kV) shielded cable appears to be a relatively eim simple electrical machine It does electrical work but there are no parts that move, at...
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electrical power cable engineering (1)
Ngày tải lên :
21/03/2014, 12:09
... these cables became available for smoother and cleaner conductor shields Vast improvements in the materials and processing of extruded, medium voltage power cables in the 1980s has led to cables ... component materials improved their products Cable manufacturers improved their handling and processing techniques MEDIUM VOLTAGE CABLE DEVELOPMENT 11-71 In the mid 1960s, conventional polyethylene ... loop system.) System voltages rose fiom 2400/4160 to 7620/13,200 volts The pre-1950 systems were very expensive because they utilized such items as paper insulated cables, vaults, and submersible...
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electrical power cable engineering (2)
Ngày tải lên :
21/03/2014, 12:09
... 600 Volt and kV Cable W l s If we use the same al volts per mil wall thickness of 600 volt cable to determine higher voltage walls, we achieve a wall of at least 4.6 inches (1 17 mm) for a 35 kV ... Medium Voltage Sbielded Cables M d u voltage (5 kV to 46 kV) shielded cable appears to be a relatively eim simple electrical machine It does electrical work but there are no parts that move, at ... 21 relatively simple cable, a low voltage non-shielded cable For simplicity, we shall contine this discussion to single conductor cable 5.1.1 Basic Components of Non-Shielded Power Cable There...
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electrical power cable engineering (3)
Ngày tải lên :
21/03/2014, 12:09
... dc resistance However, some of this weight advantage is lost when the conductor is insulated, because more insulation volume is required over the equivalent aluminum wire to cover the greater circumference ... candidates Silver has another disadvantage of lack of physical strength that is necessary for pulling cables into conduits 5.2.1 Copper Impurities have a very deleterious effect on the conductivity of ... calculate, tables have been established to give these values for common modes of operation [3-41 7.5 Cables in Magnetic Metal Conduit Due to excessive hysteresis and eddy current losses, individual phases...
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electrical power cable engineering (4)
Ngày tải lên :
21/03/2014, 12:09
... of the length of cable in ohms VD R, = = 2.9 Total Cable Reactance The total cable reactance (X) is the vector sum of the capacitive reactance and the inductive reactance of the cable in ohms per ... applicable to 480 x 1.732 or 831.38 volts phase-to-phase This, of course, means that a 1,000 volt level of insulation thickness should be selected There are no categories for low voltage cables ... practical matter, all these cables are over-insulated for the actual voltages involved CABLE CALCULATION CONSTANTS There are four main calculation constants that affect how a cable functions on an...
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electrical power cable engineering (5)
Ngày tải lên :
21/03/2014, 12:09
... has very poor abrasion resistance and very poor resistance to water migration PVC is now rarely used as a cable jacket for underground distribution cables even though it is quite inexpensive relative ... Report EL-4398, “Long Life in Cable Development: Extruded Cable Materials Survey,’’ March 1986 [5-51 EPRI Report EL-4201, “Long Life Cable Development: Processing Survey,” September 1985 Copyright ... medium and high voltage cables as the process has been well developed and defined For 69 kV transmission cables, peroxide crosslinked PE has also been the material of choice At higher voltages, peroxide...
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electrical power cable engineering (6)
Ngày tải lên :
21/03/2014, 12:09
... thickness volts per ml or kV per mm For full size cable, it is common to merely report the kV at i, which the cable has failed Hence if a 175 mil wall cable fails at 52.5 kV (or 52,500volts), the ... reported Since relatively small specimens are involved (compared to fit11 size cables), a large number are usually tested to overcome the inherent variability in results, as noted above When working ... is a tendency for the positive charges on the polymer to move toward the negative electrode, and for the negative charges on the polymer to move toward the positive electrode, hence pulling the...
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electrical power cable engineering (7)
Ngày tải lên :
21/03/2014, 12:09
... newer materials have tremendously improved cable performance in laboratory evaluations INSULATION SHIELDING FOR MEDIUM-VOLTAGE CABLES The insulation shield for a medium voltage cable is made up ... amount of metal must be provided in the cable design to ensure that the cable will activate the back-up protection in the event of any cable fault over the life of that cable There is also the concern ... over the nonmetallic insulation shield with a lay of not less than six or more than ten times the diameter over the concentric wires SHIELDING OF LOW VOLTAGE CABLES Shielding of low voltage cables...
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electrical power cable engineering (8)
Ngày tải lên :
21/03/2014, 12:09
... installations in severe rock environments, two layers of steel wires, with no individual coverings, are applied in reverse lay The outer layer frequently is applied with a very short lay to achieve optimum ... dc voltage in wet locations, as in battery operated control circuits, single-conductor PVC-insulated cables have frequently failed due to electro-endosmosis (water vapor ingress created by voltage ... produces a relatively flexible cable that can be moved and repositioned to avoid obstacles during and after installation An overall jacket is often specified in industrial and power plants for...
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electrical power cable engineering (9)
Ngày tải lên :
21/03/2014, 12:09
... has been given to the availability of insulation shield with lower stripping tensions, but they are not covered by the 1994 version of AEIC cs5 7.4.2 Resistivity The volume resistivity of this ... insulation for medium voltage cables Copyright © 1999 by Marcel Dekker, Inc 121 7.3.1 Crosslinked Polyethylene AEIC has a specification for to 46 kV medium voltage cable [9-51 that covers crosslinked ... voltage, shielded power cables require an insulation shield The insulation shield consists of a nonmetallic covering directly over the insulation and a nonmagnetic metal component directly over...
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electrical power cable engineering (10)
Ngày tải lên :
21/03/2014, 12:09
... horizontal or vertical Horizontal tubes are used for very small cables or in special extruders that employ very long dies A vertical extruder has the advantage of being able to make very large cables, ... Testing Medium Voltage Cables The tests described under Section 6.1 are also applicable to medium voltage cables These tests are generally conducted in a dry environment on finished cables Copyright ... deterioration from high temperatures Extremely low power factor Very flat power factor vs temperature curve Low ionization factor Careful investigation has shown that the unblended mineral oil...
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electrical power cable engineering (11)
Ngày tải lên :
21/03/2014, 12:09
... Bearing Pressure Limits I SWBP in Pounds per Foot Cable Type I Instrumentation 600 V non-shielded control 600 V power to 15 kV shielded power 25 to 46 kV power Interlocked Armored Pipe-type 100 300 ... friction A more viscous lubricant should be used with heavier cables, etc 2.4 Sidewall Bearing Pressure (SWBP) When one or more cables are pulled around a bend or sheaves, the tension on the cable produces ... one thing that varies tremendously is the value of the coefficient of friction it can vary f o 0.05 to 1.0 In test rm conditions, values as high as 1.2 have been recorded! Even when the materials...
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electrical power cable engineering (12)
Ngày tải lên :
21/03/2014, 12:09
... cable, the insulation shield is removed for a sufficient distance to provide the adequate leakage distance between the conductor and the shield The distance is dependent on the voltage involved ... generous dimensions used in medium voltage cables There is such a very little difference between a straight slope and a logarithmic curve for medium voltage cables that, for hand build-ups, a ... devices are designed to a v e r the range of medium voltage cable sizes It is essential that the specified cable diameters of the splice are within the specified size range of each of the cables...
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electrical power cable engineering (13)
Ngày tải lên :
21/03/2014, 12:09
... resistivity substantially over the soil in its native, undisturbed environment This means that measuring the soil resistivity prior to the cable being loaded can result in an optimistically lower value ... Standard Power Cable Ampacity Tables, [13-11, 13-12], IEEE Std 835-1994, is a book (or electronic version) that contains over 3,000 tables in 3,086 pages Voltages range f o kV to 138 kV.Although ... in cable = Capacitanceof individual shielded conductors in PPFJfi E = Operatingvoltage to ground in kV Fp = Power factor of insulation = Dielectric constant of the insulation DO = Diameter over...
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electrical power cable engineering (14)
Ngày tải lên :
21/03/2014, 12:09
... shield, or sheath, of a cable must have sufficient conductivity in metal to carry the available fault current that may be imposed on the cable Single conductor cables should have enough m t l in its ... cables in a circuit where the cables are installed as an equilateral triangle is given by: VSh = where I x x , (14.2) Vsh = sheath voltage in microvolts per foot of cable I = current in a phase ... was to limit the induced sheath voltage on the cable shield A 1950 handbook said that “The safe value of sheath voltage above ground is generally taken at 12 volts ac to eliminate or reduce electrolysis...
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