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POWER TRANSFORMER PARAMETER METER MOLNIYA-K540-3

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Specifications
Equipment

Parameter name

Value

Range of measured alternating currents (three channels) 1 , A

0.01 ... 5

Range of measured alternating voltages (two three-channel meters) 2 , V

5 ... 400

Range of measured active powers (three channels) 1.2 , W;

1 ... 2000

Measured frequency range, Hz

45 ... 55

Current measurement limits 3 , A

1.0; 5.0

Voltage measurement limits, V

one hundred; 400

Resistance measurement limits, Ohm

0.001-1900.0

Basic reduced error of voltage measurement at each of the limits, no more,%

± 0.2

Basic reduced current measurement error, no more,%

± 0.2

Basic reduced error of power measurement, no more, at cos ∠u, i ≥0.8 ,%

± 0.5

Absolute frequency measurement error, no more, Hz

± 0.25

The absolute error of measuring the resistance to direct current,

 

at Rmeas (Ohm) > 10 ;

± 500 mΩ

at 1≤Rmeas (Ohm) ≤10 ;

± 50.0 mΩ

at 0.1≤RmeasΩ < ;

± 5.0 mΩ

at 0.01 < RmeasOm <0, 1 ;

± 0.5 mΩ

Maximum milliohmmeter current, A

2

Input resistance of voltage measurement channels, not less, kOhm

600 ± 10

Voltage drop on the current measurement channel, no more, mV

75

Average service life of the device, at least, years

8

Mean time between failures, not less, h

10,000

Meter weight in full completeness, no more, kg

6

 

Notes:

1 - Without using an external measuring current transformer.

2 - Without using an external instrument voltage transformer.

3 - At the 5A measurement limit, the meter maintains its operating characteristics up to a measured current of 10A.

The permissible additional measurement error caused by a change in the ambient temperature from normal to extreme values ​​in the operating temperature range does not exceed half the limit of the permissible basic error.

Designation

Name

amount

Note

K5403-01-1.00.00.00RE

Power transformer parameters meter LIGHTNING - K540-3

Manual

1

 

K 540-3

Power transformer parameters meter Molniya-K540-3

1

 

KIS-10

Resistance cable

2

Length 10.0 m

KS

Network cable

1

 

The purpose of the meter is to perform electromagnetic tests of transformers of all circuits and connection groups in accordance with the requirements of the PUE, as well as RD 34.45-51.300-97 "VOLUME AND STANDARDS OF TESTING OF ELECTRICAL EQUIPMENT". Measurement techniques are given in accordance with GOST 3484.1-88 “Power transformers. Electromagnetic Test Methods ".

The power transformer parameter meter MOLNIYA-K540-3 performs the following functions:

  • Measurement of current and no-load losses at low and rated excitation voltages of transformers;
  • Measurement of current and short circuit losses;
  • Transformation ratio measurement;
  • Determination of the group of connection of windings of three-phase transformers and the polarity of the terminals of single-phase transformers;
  • Measurement of resistance of transformer windings to direct current.
  • In the process of measurement, the control of asymmetry, nonsinusoidality and frequency of the excitation voltage is performed.

The meter is designed for maintenance, repair, adjustment, testing of power transformers, both in laboratory and in the field. The product version corresponds to the climatic category UHL 4.2 in accordance with GOST 15150-69.