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  RD-33 Dytronic Three-Phase Reference Standard
 
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RD-33



Features



Measurement
The RD-33 is Radians most accurate fully traceable four quadrant measurement standard. The RD-33 measures bi-directional energy flow and provides voltage, current, power and energy (Active, Reactive, Apparent) information.


Meter and Standard Testing
The RD-33 can be used with a controlled current source to test revenue meters within a Meter Test System environment, or standalone to calibrate other energy reference standards. In field applications the RD-33 can perform a true three phase meter accuracy test using existing service load up to 200 Amps direct or 3000 Amps using clamp probes.



Analog Sense
The RD-33ís Optional analog sense feature enables testing transducers and energy meters that provide an analog output between +/- 20 mA dc.

 



Overview



Product Highlights
The Radian RD-33 Three-phase Electricity Reference Standard achieves a level of accuracy and performance never before available in a portable standard. The RD-33 has a guaranteed accuracy of 0.01% for all measurement functions across its entire operating range, with a typical accuracy that is within traceability uncertainties. This guaranteed accuracy specification includes the variables of stability, power factor, and traceability uncertainty.

The RD-33 utilizes Radian’s new Dytronic measurement technology consisting of a Radian designed Integrating Analog to Digital Signal Converter. Unlike off-the-shelf A/D Converters used in other instruments, Radian’s A/D Converter is specifically designed and optimized for power and energy measurement. This unique design makes the RD-33 absolutely unsurpassed in its ability to accurately measure “real world” waveforms. The RD-33’s A/D Converter is combined with Radian’s renowned electronically compensated voltage and current input transformers and a hermetically sealed reference set to provide the highest degree of accuracy, stability and versatility offered in a portable three-phase standard.

Measurements
The RD-33 is a four quadrant three-phase measuring instrument that registers both forward and reverse energy flow and provides per phase voltage, current, power and energy (Active, Reactive, Apparent) information.

Analog Sense
The optional analog sense feature enables testing of transducers and electronic energy meters that provide an analog current output between +/- 20 mA.

Meter and Standard Testing

The RD-33 can be used with a controlled current source to test revenue meters and reference standards. In field applications the RD-33 can perform a true three phase meter accuracy test using existing service load. Pickups to sense meter disk rotation or calibration pulses of infrared, visible light or KYZ variety plug directly into the unit. The RD-33 is ideal for testing high end energy meters found in power plants, substations, inter-tie points and at large utility customer accounts. The RD-33 is also the perfect complement to relay test sets where it can serve as an active reference standard when testing meters or can be used to periodically certify the accuracy of the test set itself.



Technical Data

Package Contents

  • RD-33 Standard
  • RD-2x and RD-3x Manual CD
  • RD-2x and RD-3x Getting Started Guide
  • Cables


RD-3X Specifications

Unless stated specifications apply to the Radian Model RD-30, RD-31 and RD33.  All accuracy specifications are guaranteed and include traceable accuracy to calibration standards used, 95% confidence level. Specifications are for 365 day calibration interval.



General

Operating Range:

Current: 0.001 to 120 Amp, (200 Amp optional)
Voltage: 30 to 630 Vac (60Hz), 30 to 525 Vac (50Hz)
Aux Power: 60 to 630 V (autoranging)
Frequency: 45 Hz to 65 Hz

PF Accuracy

Power Factor

RD-30

RD-31

RD-33

> 0.5

0.04 %

0.02 %

0.01 %

 0.5

0.04 %/2PF

0.02 %/2PF

0.01 %/2PF

 

Harmonic Analysis: < 64th (bandwidth 10000 Hz)

Dimensions:

5"(127 mm), 17.5" (444.5 mm), 6.25" (158.7 mm)

Weight:

16 lbs (7.2 kg), Shipping weight 28 lbs (12.6 kg)

 

 

Environment:.

Operating & Storage Temp: -20°C to +70°C

 

Humidity: 0 % to 95 % non condensing

 

Vibration: All non destructive

 

 

Safety:

Hi-Pot: 2.3 kVrms, 60 Hz for 60 seconds

 

Surge: IEEE 472 and ANSI 37.90

 

Fused: Potential and Auxiliary Input

Warm-up:

15 seconds

 

Interface

Display:

Touch screen, color back lit LCD

 

Communications:

Serial Port: RS -232

 

Sensor Port: Lemo type

 

Clamp Probe Port: 3 CT Inputs (optional Clamps from Radian)

 

Inputs 1,2 & 3:

BNC Display gate: 150 Ohm pull up to 5 V, clamped at 5.7 V

 

BNC Gate rate: 200 nS pulse width minimum, maximum 20 Hz repetition rate.

Outputs 1, 2 & 3:
(default = 0.00001 Wh/pulse)

Programmable KH value
Open collector, clamped at 27 V
Max 2.1 MHz (200nS pulse width minimum)
Selectable Watt Hours, VAR Hours, VA Hours

 

Current Inputs: 6 mm (<120 Amp), 8 mm (<200 Amp option)

 

Aux & Potential Inputs: 4 mm

 

Specifications

Function

Reading

Accuracy (ppm)3
TCAL1± 5°C

Stability
Square Root

Cal Unc.
(ppm)

Temperature Coefficient6 (ppm/°C)

RD-30

RD-31

RD-33

RD-30

RD-31

RD-33

Voltage

30 V to 630 V5

200

100

50

8

4

2

30

2.5

Current

1 mA … 10 mA2

280

140

70

12

6

3

50

2.5

10 mA … 200 A

Power/Energy 3,4

1 mA … 10 mA2

400

200

100

16

8

4

80

5

10 mA … 200 A

Power Factor

> 0.5

0.04 %

0.02 %

0.01 %

 

 

 

 

 

 0.5

0.04%/2PF

0.02%/2PF

0.01%/2PF

Phase angle

0° … 360°

0.012°

0.006°

0.003°

 

 

 

 

 

 

RD-BR1 CT Burden & Ratio Analysis Specifications

Input Power

RD Standard connection (Allows 60-600V at Site)

Measurement Inputs

Primary CT Current:

0.1 – 3000 Amperes, 50 or 60 Hz (using probes)

Secondary CT Current:

0.01 – 20 Amperes, 50 or 60 Hz

CT Primary Probe Input Voltage:

3V RMS Max (using RR-CTA1)

Probe Scales:

10mV/A

Accuracy

Dependent on RD standard & clamp-on probe selected

CT Burden Testing

CT Burden Value:

0.1, 0.2, 0.5, 1.0,4.0 & 8.0 Ohms

Resistive Element Tolerance:

+/- 1%

Insertion Burden:

+/- 0.04 Ohms



Notes:
1TCAL = 23°C
2 20mA/Reading x Accuracy Specification (ppm)
3 Includes variables of Stability, Power Factor, and Traceability Uncertainty
4 (30 V … 630 V) For  1 second Test
5 Maximum 525 V at 50 Hz
6 Maximum -20 ºC … +70 ºC





17025 Accredited Certificate option available



Repeatability





RD-33 Menu for Measurements & Functionality

The last three digits determine the model.  The first of the last three digits determines the measurement functions. The second digit determines if the unit has a built-in computer, power analysis option and/or analog sense input. The third of the last three digits determines the current input configuration and enclosure type.



Specifying the first of the last three digits:  RD-33-Xxx
MODEL MEASUREMENT FUNCTIONS
RD-33-2xx Whrs, VARhrs, Volts, Amps, VAhrs, Qhrs, Watts, VARs,VA,  Phase Angle, PF, Frequency
RD-33-3xx Whrs, VARhrs, VAhrs, Qhrs, Volts, Amps, Watts, VARs,VA, Vhr, Ahr, V2hr, A2hr, Phase Angle, PF, Frequency & Clamp Probe Input
Min & Max measurements: All indicating functions
RD-33-4xx Whrs, Volts, Amps, VARhrs, Qhrs, VAhrs, Watts, VARs,VA, Vhr, Ahr, V2hr, A2hr, Phase Angle, PF, Frequency, Clamp Probe Input
Min & Max: All indicating functions
AVG response: VAhrs, VA, Volts, Vhrs, Amps, Ahrs
 
Specifying the second of the last three digits:  RD-33-xXx   
-x0x No computer, No power analysis, No analog sense input
-x1x Built-in computer (with color display and WIN CE MobileSuite software)
-x2x Power analysis (Harmonics, Trending and Vector Analysis)
-x3x Built-in computer and Power analysis
-x4x Analog Sense Input (for Volts, Amps, Watts, VARs, VA)(+/- 20mA DC max)
-x5x Built-in computer and analog sense input
-x6x Power analysis and analog sense input
-x7x Built-in computer, power analysis and analog sense input
 
Specifying the third of the last three digits:  RD-33-xxX 
-xx1 120 Amp (6mm insert) current inputs, Rack Mount
-xx2 200 Amp (bolt on) current inputs, Rack Mount 
-xx3 120 Amp (6mm insert) current inputs, Portable
-xx4 200 Amp (bolt on) current inputs, Portable 




Accessories



RD-BR1
CT Burden & Ratio Analysis Module

RM-111
Automated Comparator

RR-PCSuite
Testing and Analysis PC Software

RR-1H
Optical Pickup

RR-KYZ
Pulse Input Adapter with 4-Pin plug

RR-DS
Disk Sensor

Cables and Leads

 

Current Probes

 

IRDS
Sensor

RR-Kit
Software for Custom Application Development


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