PRODUCTS PARTIAL DISCHARGE TESTING & MONITORINGACQUISITION UNITS PD3U

PD3U

Enables PD measurements even with large background noise

Spectrum Analyzer, Partial Discharge Detector, and RIV Meter

Its benefits include frequency spectrum analysis, 4-channel measurement capability, and center frequency adjustable from 10 kHz – 10 MHz in 10 kHz steps.

Compact design
Easy to use
Precise results
Stand-alone or computer operated
Frequency spectrum analysis
4-channel measurement capability
Center frequency is adjustable from 10 kHz – 10 MHz in 10 kHz steps

OVERVIEW

Partial Discharge Measuring

The model PD3U comprises a Spectrum Analyzer, a PD detector, and a RIV meter in one instrument. This combination enables PD measurements even with a large background noise, such as in non-shielded test areas. Observing the frequency spectrum of a significantly noisy PD signal allows the user to select frequency bands with less disturbance resulting in a clearer pattern acquisition.
In RIV mode, the instrument has bandwidth of 9 kHz and 270 kHz. When utilizing either the CAL3B or CAL3D calibrator, the range is 400 kHz – 1900 kHz in steps of 100 kHz. Technically, the 4 Channel unit in RIV mode, is a selective µV-meter according to the CISPR weighing curve whereas the repetition rate has a strong impact on the reading.
Measurements are according to IEC 60270-2000, IEEEC57.12.90, and RIV measurements are according to NEMA/CISPR regulations and other relevant standards.

Testing Applications

Condition evaluation of insulation systems
Quality assurance testing in manufacturing plants
Routine testing in a variety of applications

MODES

Spec Mode

Shows the frequency spectrum of the input signal with a selectable span of up to 10 MHz. Three spectrum traces of the current input channel can be stored, compared, and analyzed. A variable curser serves to set the center frequency for acquisition of the PD pattern.

Scope Mode

Displays the PD pattern versus phase. The SYNC frequency ranges from 10 to 500 Hz. The PD activity can be shown as vertical bars or as dots.

Meter Mode

Displays PD activity similar to analog metering. Three modes are available for the charge value in pC (FAST, NORM, IEC270) and one for the voltage value in µV (RIV).

HVM Mode

Used to observe the measured voltage waveform. The High Voltage Meter (HVM) shows the voltage supplied at the SYNC input. The input voltage is sampled in high resolution and one cycle is displayed as an oscilloscope trace. Any distortion of the high voltage is identified. The screen is automatically synchronized with the measured voltage and the amplitude deflection is controlled by an auto-range function.

DESIGN FEATURES

Desktop Acquisition and Display Unit

Spectrum, Scope and Meter display
Selectable bandwidth 9 kHz and 270 kHz
Center frequency is adjustable from 10 kHz – 10 MHz in 10 kHz steps
MUX4 Multiplexer 4-channel measurement
Internal (line 50/60 Hz) and external synchronization (10-500 Hz)
Auto-range function
Backlit LCD 240 x 128 dots
RIV and PD calibration
RIV reference input
Automatic storage of current settings
Universal serial interface (USB, up to 921 kB)
AMP IN and REF IN connector
REC OUT

Built-in Voltage Measurement

Measures the voltages at the external sync input terminal
Display of peak; peak/√2, and RMS value
Input range 100 Vrms
Input impedance: 1 MΩ

Built-in TTL Gating

Triggered Noise Cancellation
Software controlled gating from a signal connected to an auxiliary input
Gating threshold may be set manually or automatically
Includes the built-in logarithmic preamplifier RPA6

SPECIFICATIONS

Acquisition Unit

Input	100-240 VAC, 50/60 Hz
Power	25 VA
Temperature Range	10°C – 40°C
Dimensions	9 ³/8” (236 mm) W
	11½” (295 mm) D
	5¼” (133 mm) H
Weight	7 lbs. (3 kgs)

Reference Voltage Input

Input Impedance	100 MΩ / 200 pF
Input Voltage	Max. 120 V (rms)
Frequency	10-500 Hz

Partial Discharge Signals

Coupling	AC
Input Impedance	50 Ω (without RPA)

OPTIONS & ACCESSORIES

Options

Rack Mounting Kit

19”, 3RU for mounting into a control console

PD3U Software

Standard Data Acquisition & Control Package
Virtual Instrument to remote control the PD3U and to record data vs. time and vs. voltage
3-D Phase Resolved PD Pattern Acquisition, including ActiveX driver
Supports fast USB communication
12 month free software updates via Web Site

Active-X Driver (Access to the Com port for use with PHENIX software or 3rd party software)

Accessories for Additional RIV Measurements

RIV Quadrupole Model CIT4M/v2u0/RIV (1 required per channel)

Measuring Impedance for PD, RIV NEMA and CISPR use

Built-in voltage divider
Coupling isolation transformer
Ck: 600 pF to 2.5 nF
Imax []800 mA
Cd = 2 uf (Umax 100 Vrms)
Switchable (150 Ω / 300 Ω)

RIV Calibrator

Model	CAL3B	CAL3D
Frequency	400 kHz to 1.9 MHz	400 kHz to 1.9 MHz
Range	10 µV to 10 mV	10 µV to 10 mV (into 300 Ω)
Injection Capacitance	V (50 Ω)	V (>20 KΩ)
Use	NEMA 107 compliant	CISPR 18-2 compliant

Additional Specs: 50 Hz or 60 Hz light synchronization, BNC connection

RESOURCES

Download Brochure

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