The device (measuring kit) K507 (K 507, K-507)
The device (measuring kit) K507 is designed for calibration of differential-null method of measuring current and voltage transformers of accuracy class of 0.05, 0.1, 0.2, 0.5, 1, 3, 10 with rated secondary currents of 1A, 2A, 2 5A and 5A and the nominal secondary voltages of 100V, 150V and 200V active and reactive components of impedance and admittance to the transformer secondary circuit being checked at a frequency of 50 Hz.
The device (measuring kit) K507 designed for testing differential-null method of measuring current and voltage transformers of accuracy class of 0.05, 0.1, 0.2, 0.5, 1, 3, 10 with secondary nominal currents of 1, 2, 2 , 5 and 5 A and the nominal secondary voltages of 100, 150 and 200 in the active and reactive components of impedance and admittance to the transformer secondary circuit being checked at a frequency of 50 Hz. device makes it possible to measure the K507 in the process of checking transformers proactive and reactive components of impedance and admittance of transformer secondary circuit being checked.
The device (measuring kit) K507 can be used as a rectangular-coordinate potentiometer to measure AC voltages up to 5 mV.
TECHNICAL SPECIFICATIONS AND FEATURES
Limits of measurement errors in the calibration of instrument transformers and the limits permitted by the basic errors of the device are shown in Table K507. 1
NOTE. When current from 0.1 to 0.5 A at voltages i from 20 to 50V allowable error values at all K507 apparatus within the measurement twice specified in Tables 1, 2 and 3.
The limits of resistance measurement and the limits of permissible errors in the measurement apparatus K507 resistance in the process of checking the current transformers are shown in Table 2.
Conductivity measurement range and limits of permissible errors apparatus K507 conductivity measurement in the process of checking the voltage transformers are indicated in Table 3.
Limits of stress measurement using the apparatus K507 as a rectangular-coordinate potentiometer AC are:
up to 5 mV - at an operating current of 5A;
to 2.5 mV - at an operating current of 2.5 A;
up to 2 mV - at an operating current of 2A;
up to 1 mV - at an operating current of 1A;
to 3mV - with an operating voltage 200V;
to 1.5 mV - 100 V operating voltage.
Output accuracy K507 apparatus for measuring the voltage does not exceed ± 2% of full scale in-phase component of the voltage at rated operating current (voltage).
Rated current range for unit K507 calibration of instrument transformers from 20 to 120% of rated current. Nominal voltage range of the device at K507 calibration of instrument transformers, voltage from 20 to 120% of rated voltage.
Output accuracy multimeter does not exceed 0.5% of the final value of the working part of the scale. Operating multimeter when measuring the current from 10 to 40% and from 20 to 120% of rated current. Operating multimeter measurement voltage of 20 to 120% of the rated current.
Triggering alarms confusion of:
for verification of current transformers 1-2 A
for verification of voltage transformers 45-70 V.
Nulindikatora normal range of frequencies from 30 to 61 Hz. Selectivity nulindikatora on the third harmonic of not less than 60 dB. A range of voltages input nulindikatora causing deviation pointer 100 and 10% of the maximum value of no more than 35 dB.
The sensitivity of the device with a built-K507 nulindikatorom not less than 10 mm of its scale detuning balanced circuit included for testing transformers, 0.005% counted at the limit of measurement of 0.1% at a current in the secondary circuit under test and a model of the current transformer is equal to 0, 1 A.
Nulindikatora Power is provided by an AC voltage of 220 V at 50 Hz. Power consumed nulindikatorom, no more than 10 V • A. Overall dimensions 710 x 480 x 240 mm. Weight to 24 kg