User guide

OPTIONAL ACCESSORIES
The FRAX Demo box FDB 101 is a transformer kit that
can be used for in-house training and demonstrations. The
small transformer is a single-phase unit with capability to
simulate normal as well as fault conditions. Open as well
as shorted measurements can be performed. The unit also
contains two test impedances, one of them the same as
used in the FTB101 field test box.
FRAX 150
Sweep Frequency Response Analyzer
DYNAMIC RANGE
Making accurate measurements in a wide frequency range
with high dynamics puts great demands on test equipment,
test leads, and test set up. FRAX 150 is designed with
these requirements in mind. It is rugged, able to filter
induced interference and has the highest dynamic range
and accuracy in the industry. FRAX 150 internal noise
level is shown in red below with a normal transformer
measurement in black. A wide dynamic range, i.e. low
internal noise level, allows for accurate measurements in
every transformer. A margin of about 20 dB from the lowest
response to the internal noise level of the instrument must
be maintained to obtain ±1 dB accuracy.
SPECIFICATIONS
General
FRA Method: Sweep frequency (SFRA)
Frequency Range: 0.1 Hz - 25 MHz, user selectable
Number of Points: Default 1046,
User selectable up to 32,000
Measurement time: Default 64 s, fast setting,
37 s (20 Hz - 2 MHz)
Points Spacing: Log., linear or both
Dynamic Range/Noise Floor: >130dB
Accuracy: ±0.5 dB down to -100 dB
(10 Hz - 10 MHz)
IF Bandwidth/Integration Time: User selectable (10% default)
Software: FRAX for Windows
Calibration Interval: Max 3 years
Standards/guides: Fulfill requirements in Cigré
Brochure 342, 2008
Mechanical condition assessment of
transformer windings using
FRA and Chinese standard DL/T
911-2004, FRA on winding
deformation of power transformers,
as well as other international
standards and recommendations
Input Power
90 - 264 V ac, 47 - 63 Hz
Analog Output
Channels: 1
Compliance Voltage: Output voltage 0.2 - 24 V p-p
(open circuit)
Measurement Voltage at 50 Ω: 10 V (adjustable 0.1-12 V)
Output Impedance: 50 Ω
Protection: Short-circuit protected
Analog Input
Channels: 2
Sampling: Simultaneously
Input Impedance: 50 Ω
Sampling Rate: 100 MS/s
Operating System
Windows
®
based
Memory
1000 records in internal memory. External storage on USB stick
Physical
Dimensions: 305 mm x 194 mm x 360 mm
(12 in. x 7.6 in. x 14.2 in.)
Weight: 6 kg (13 lb)
Environmental
Operating Ambient Temp: 0° C to +50° C / +32° F to +122° F
Operating Relative Humidity: < 90% non-condensing
Storage Ambient Temp: -20° C to 70° C / -4° F to +158° F
Storage Relative Humidity: < 90% non-condensing
CE Standards: IEC61010 (LVD) EN61326 (EMC)
An example of FRAX 150’s dynamic limit (red) and transformer
measurement (black)