The tangent-3M-3 - Installation for measurement of the tangent of dielectric loss angle of transformer oil

Installation of measuring the dielectric loss of liquid dielectrics "Tangent-3M-3" is intended for measurement of the tangent of dielectric loss angle of transformer oil and some other liquid dielectrics carried out according to GOST 6581-75.

1.1.2 Device "TANGENT-3M-3" made in execution, meets the requirements of GOST 22261 for electronic measuring devices group 2.

 

1.2 OPERATING ENVIRONMENT

 

1.2.1 "TANGENT-3M-3" the following normal conditions of use:

ambient temperature, °C

20±5;

relative humidity, %

80 at 25°C;

atmospheric pressure, kPa (mm RT. Art.)

84-106 (630-795);

the power supply frequency, Hz

50±1.

1.2.2 Device "TANGENT-3M-3" designed for use in the following working conditions:

ambient temperature, °C

10 to + 35;

relative humidity, %

up to 80 at 30 °C;

atmospheric pressure, kPa (mm RT. Art.)

70-106,7 (537-800);

the power supply frequency, Hz

50±1.

1.2.3 Limiting conditions transportation:

ambient temperature, °C,

from minus 20 to plus 50;

relative humidity, % to

95 at 30 °C;

atmospheric pressure, kPa (mm RT. Art.)

70-106,7 (537-800);

transport shaking:

 

the number of beats per minute

80-120;

maximum acceleration, m/S2

30.

1.2.4 Operation the device is provided by one operator, who has studied this document, trained in the practical use of the instrument, and has a group technique security in installations with voltages exceeding 1000 V, not less than one third.

1.3 TECHNICAL FEATURES

1.3.1 Device "TANGENT-3M-3" provides in normal conditions of use, the dimension of the tangent the dielectric loss angle (tgδ) and the capacity of samples of liquid dielectrics (AU) ranges basic error of measurement below:

- measurement range of the tangent of an angle dielectric loss

1. 10-4 to 0.99;

- the limit of absolute basic error in the measurement of the tangent of an angle dielectric loss (1)

+ (2. 10-4 + 0,05 tgδ)%;

- measuring range tank at test the voltage from 1.5 to 2 kV

from 5 pF to 100 pF;

- maximum permissible absolute error when measuring capacitance at a frequency of 50Hz

1 pF+0,01 CX;

- maximum permissible absolute error when measuring capacitance at a frequency of GC

1 pF+0,03 CX;

the ultimate rejection temperature the fluid being measured from a predetermined temperature, °C

+1;

- the limit of absolute basic error in the measurement of the tangent of dielectric loss angle (2)

+ (2,5 . 10-4 + 0,07 tgδ);

the limit of permissible relative error in the measurement of RMS voltage at a frequency of 50 Hz in the measurement range voltage from 1 to 2 kV

+3 %;

the limit of permissible relative error in the measurement of RMS voltage at a frequency of 54 Hz in the measurement range voltage from 1 to 2 kV

+3 %;

- maximum permissible absolute error of measurement of the temperature of the test liquid dielectric

+1 °C.

the time of heating to 90 °C, min.

80±20

-cell volume, CC

60±2

-supply voltage single-phase AC current,

220±22

-power consumption, kW, not more

0,6

- 1for the entire range of the measurement tank at the frequency of the test voltage 50 Hz;

- 2for the entire range of the measurement tank at the frequency of the test voltage Hz.

1.3.2 the Limit of additional measurement errors caused by changes in ambient temperature from normal (20±5 °C) to any within the workspace, does not exceed 10% of permissible absolute error of measurement for every 10 degrees. temperature changes.

1.3.2 "TANGENT-3M-3" gives results of measurements on the LCD dis