Meter power transformers parameters K-540-3

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PURPOSE AND OPERATING CONDITIONS

Assignment meter - execution electromagnetic test transformers of all circuits and groups of compounds in accordance with the requirements of the SAE as well as taxiway 34.45-51.300-97 & laquo; VOLUME AND STANDARDS FOR TESTING ELECTRICAL & raquo ;. Methods of measurement are shown in accordance with the GOST 3484.1-88 & laquo; Power transformers. Test Methods electromagnetic & raquo;.

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Meter power transformers parameters & laquo; K540-3 & raquo; performs the following functions:

a) Measure the current and load losses at low and nominal voltages excitation transformer;

b) Measurement of current and short-circuit loss;

c) Measurement of the transformation coefficient;

d) Determination of group winding connection of three-phase transformers and polarity terminals of single-phase transformers;

d) winding resistance measurement transformers DC

. during the measurement control is performed asymmetry, non-sinusoidal driving voltage and frequency.

meter for maintenance, repair, adjustment, testing power transformers, both in laboratory and field conditions. Execution of the product corresponds to climatic category UHL 4.2 GOST 15150-69

normal conditions of use

& bull.; Ambient temperature, & deg; C, & ndash; 20 ^{& plusmn; 5 ;}

& bull; relative humidity,%, & nbsp; & Ndash; 30-80;

& bull; atmospheric pressure, kPa (mm Hg...), & ndash; 84-106 (630-795);

& bull; mains voltage AC, B, & ndash; 220 ^{& plusmn; 4,4 ;}

& bull; supply frequency, Hz, & ndash; 50,0 ^{& plusmn; 0,5}

Operating conditions of use:

& bull;. Ambient temperature, C, & ndash; from + 5 to + 40;

& bull; relative humidity,%, & ndash; to 80 at 30 & deg; C;

& bull; atmospheric pressure, kPa (mm Hg...), & ndash; 84-106,7 (630-800);

& bull; mains voltage AC, B, & ndash; 220 ^{& plusmn; 22 ;}

& bull; supply frequency, Hz, & ndash; 50 ^{& plusmn; 1}

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SPECIFICATION

Range of measured variables currents (three channels) ^{1 < / sup>, A, & ndash; . 0,01-5}

Range of measured alternating voltages (two & nbsp; three-channel meter & nbsp;) ^{2 , B, & ndash; . 5-400}

Range of measured active power & nbsp; (Three channels) ^{1,2 , & nbsp; W, & ndash; . 1-2000}

The range of measured DC resistance, Ohm, & ndash; . 0,00005-1999

The range of measured frequency in Hz, & ndash; . 45-55

current measurement Limits, A, & ndash; . 0.1, 1, 5

voltage measurement Limits In, & ndash; . 100-400

resistance measurement limits, ohms, & ndash; . 0,00002-1999

Basic reduced error voltage measurement, not more,%, & ndash; . 0,2

Basic reduced power measurement error, not more,%, & ndash; . 0,5

Basic reduced error measure currents, not more,%, & ndash; . 0,5

The absolute error in the frequency measurement, no more Hz, & ndash; . 0,25

Basic reduced resistance measurement error DC,%, & ndash; . 0,5

Input impedance voltage measurement channels, at least, & nbsp; k, & ndash; . 400

Falling load voltage current measurement channels, not more mV, & ndash; . 75

The average life of the appliance at least, & nbsp; s, & ndash; . 8

The average time between failures, hours, & ndash; . 10000

Acceptable additional measurement error caused by ambient temperature change from the normal to the limit values ​​in the operating temperature range does not exceed the maximum permissible basic error

& nbsp;. < p> Note:

^{1 & ndash; without the use of external measuring current transformer;}

^{2 & ndash; without the use of external measuring transformer voltage.}

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