Instruments RD-20, RD-21 and RD-23 (further RD-2X) are the single-phase model (standard) counters of electric power with the high accuracy of the measurement of current, voltage, active and reactive energy and power.

A series RD personified before itself the new technology of the measurements Of dytronics, based beyond the use of the integrating analog-to-digital converter (converter) of signal. In contrast to already existing ATsP, utilized before other instruments, ATsP Dytronic is specially developed for measuring the parameters of electric power. This makes possible AT THE POINT OF RD-2X to conduct measurements with the exceptional accuracy even due to the conditions of interferences.

	RD-20	RD-21	RD-23
Typical error	+ 0,01%	+ 0,005	-
Maximum permissible error	+ 0,04%	+ 0,02%	+ 0,01%

Standard counters RD ensure the simultaneous measurement of active and reactive energy and power in the complete range of phase shift of 360°. Entrances for measuring of current, voltage, and so for the nourishment of instrument, have the automatic tuning of limits, which protects instrument from the damage as a result of incorrect connection.

- Range on the stress of 30-600 volts
- Range on the current of 0,02-125 amperes
- Range on the voltage of supply of 60-600 volts

Because of their compactness and lung to the weight of 2,5 kgf standard counters RD are ideal for checking the working counters of electric power due to the field conditions. So it can be used with the controlled load or with the current-measuring tongs for conducting the load test. With the harmonic analyzer the instrument will reflect harmonics to 50 orders.
Instrument can automatically calculate the test results of the counter being investigated, substituting the role of external comparator.
Instruments RD-2[KH] so it is used as standard in the verifying stations of the counters of electric power.

RD-2[KH] has RS-232 port for the connection for the sake of the computer. Radian Of research developed several packets of software (ПО) for the adaptation of possibilities RD-2[KH] to the tasks of user. ON RD-Configure it makes it possible to adapt the functional possibilities of instrument to the tasks of user. ON RD-Analyze, which works together with the harmonic analyzer, it makes it possible to observe the waveforms of current and voltage before the real time, reflecting harmonic order, their phase and amplitude. These data can be preserved for further study. ON RD-Kit it contains the necessary commands and the programs, which make possible at the point of user to create its own program for the work with RD-2[KH].

Specification

The operating conditions Current (automatic ranking) 0,02 - 67[A] 0,02 - 75[A] 0,02 - 120[A] VKh. Stress 30- of 600[V] Voltage of supply 60- of 600[V] Frequency 45 - 65[Gts] Phase 0 - 360º or -180 ÷ +180º Capacity rate -1 ÷ +1 Temperature of -20º ÷ of +70º Humidity 0 ÷ 95% Physical characteristics of the instrument Weight of 2,5 kgf (3,6[kg] of [transp]) Sizes of 190 X of 140 X of 140 mm [ZHK] screen with the illumination Checking and the calibration It does not require manual tuning, calibration is produced with the aid of software [Mezhkalibrovochnyy] interval of 365 day Readiness 30 flogged after inclusively. Accuracy The maximum permissible error is manifested with the total influence of all destabilizing factors and with [s]os φ < 0,5. Example of the selection of the instrument For example, let us select instrument RD-21-334. This will mean that the instrument is capable to measure the following values: Watt-hours (Whrs), stress (the V), current (a), Pitch- hours (VARhrs), Volt-ampere- hours (VAhrs), reactive hours (Qhrs), watts (W), pitches, total power (VA), Volt- hours (Vhrs), ampere-hours (Ahrs), [Volt]2- hours, [Amper]2- hours, phase angle, capacity rate, frequency, Fixation of min and max of the values of all enumerated values. Instrument has functions of comparator and harmonic analyzer, entrance with the range of current 120 A, and it is fastened before the counter.

Menu for the selection of the model Last three numbers determine the model of counter. First number - set of the measured parameters. The second - presence of comparator, harmonic analyzer and/or analog entrance. The third - configuration of current entrance. Interpretation of the code of the model RD-2X-1xx Watt-hours (Whrs), stress (the V), current (a), Pitch- hours (VARhrs) RD-2X-2xx Watt-hours (Whrs), stress (the V), current (a), Pitch- hours (VARhrs), Volt-ampere- hours (VAhrs), reactive hours (Qhrs), watts (W), pitches, total power (VA), phase angle, capacity rate, frequency. RD-2X-3xx Watt-hours (Whrs), stress (the V), current (a), Pitch- hours (VARhrs), Volt-ampere- hours (VAhrs), reactive hours (Qhrs), watts (W), pitches, total power (VA), Volt- hours (Vhrs), ampere-hours (Ahrs), [Volt]2- hours, [Amper]2- hours, phase angle, capacity rate, frequency, the fixation of min and max of the values of all enumerated values. RD-2X-4xx Watt-hours (Whrs), stress (the V), current (a), Pitch- hours (VARhrs), Volt-ampere- hours (VAhrs), reactive hours (Qhrs), watts (W), pitches, total power (VA), Volt- hours (Vhrs), ampere-hours (Ahrs), [Volt]2- hours, [Amper]2- hours, phase angle, capacity rate, frequency, the fixation of min and max of the values of all enumerated values, the indication of average values. RD-2X-[kh]0x - without comparator and harmonic analyzer RD-2X-x1x - with the built-in comparator. RD-2X-x2x - with the harmonic analyzer. RD-2X-x3x - c by comparator and by harmonic analyzer RD-2X-x4x* - analog entrance (for U, A, P, Q, VA) (2mA DC of max) RD-2X-x5x* - comparator and the analog entrance RD-2X-x6x* - harmonic analyzer analog entrance. RD-2X-x7x* - comparator, the analysis of harmonics the analog entrance * - only for RD-21, RD-22 and RD-23 RD-2X-xx1 - entrance for current tongs and 120 A RD-2X-xx2 - entrance for the current tongs and three 67[A] of the current of entrance (only 200 a) RD-2X-xx3 - entrance for current tongs and three 75 A of the current of entrance (only 225 a) RD-2X-xx4 - fastening before counter, one 120 The entrance

Description of the type of the standard counters Of rD2x-xxx