Power transformers are some of the most vital components in modern transmission and distribution infrastructure. Transformer failures cost enormous amounts of money in unexpected outages and unscheduled maintenance. It is important to avoid these failures and make testing and diagnostics reliable and efficient.

Sweep Frequency Response Analyzer was developed for testing the integrity of power transformers after transportation or occurrence of high currents.

Sweep Frequency Response Analyzer FRA100 uses the SFRA(Sweep Frequency Response Analysis) method and measures the electrical transfer function in a wide frequency range. It detects winding defects and faults in the magnetic core-thereby helping to improve transformer reliability, reduce maintenance costs and prevent costly failures. 

Sweep Frequency Response Analyzer FRA100 fulfills requirements in Cigre Brochure 342,2008 mechanical condition assessment of transformer windings using FRA and Chinese standard DL/T 911-2016, FRA on winding deformation of power transformers, as well as international standard IEC60076-18:2012.

The main features of Sweep Frequency Response Analyzer FRA100 are as follows:

●Use SFRA(Sweep Frequency Response Analysis) to test winding deformation by measuring each winding’s amplitude-frequency response characteristics of power transformers(6kV and above voltage grade) without hang cover or disassembly.

●Quick measuring: the measurement time of single winding is less than 2 minutes.

●High frequency accuracy: ≤0.001%  

●Maximum sweep points up to 50,000

●Digital frequency synthesis to ensure higher frequency stability

●5000V voltage isolation to protect laptop fully

●Able to load 9 curves at the same time and automatically calculate parameters of each curve to diagnose winding deformations and provide the reference conclusion.

●Analysis software has powerful function which can fulfills requirements of Chinese standard DL/T 911-2016 and international standard IEC60076-18:2012.

●Software management possess high humanization and intellectualization. Users only need to click one button to complete all measurements after parameters setting.

●Small size and light weight(2.3 kg / 5.07 lb) for easy carry

◇Measurement Section

Test method: SFRA(Sweep Frequency Response Analysis)

Frequency range: 10Hz–10MHz

Frequency resolution:< 0.01%

Frequency inaccuracy: ≤0.001%

Number of points: default 600, user selectable

max. 50 000 points, user defined

Measurement time: 1-2 minutes for single winding

Points spacing: logarithmic or linear

Sweep settings: individual settings for customer defined frequency bands. Linear or logarithmic scale.

Dynamic range: -120dB~20dB

Inaccuracy:   ±0.1 dB from +10 dB down to -50 dB

                      ±0.5 dB down to -80 dB

                      ±1 dB down to -100 dB

PC Communication: USB

Software: suitable for Windows XP/7/8/10

Standards: fulfills requirements in Cigré Brochure 342, 2008. Mechanical condition assessment of transformer windings using FRA DL/T 911-2004, FRA on winding deformation of power transformers, as well as international standard IEC60076-18:2012.

◇Analog Output

Channel: 1

Compliance voltage: 0.50-25 Vp-p, adjust automatically in test

Measurement voltage at 50 Ω: 0.25-12.5 Vp-p

Output impedance: 50 Ω

Frequency range: 10Hz–10MHz

Sweep direction: low to high

◇Analog Input

Channels: 2

Sampling: Simultaneously

Frequency range: 10Hz-10MHz

Input impedance: 1 MΩ

Sampling rate: 100 MS/s

◇PC Requirements(PC not included)

Operating system: Windows XP/7/8/10

Processor: Pentium 500 MHz or higher

Memory: 256 Mb RAM or more

Hard drive: Minimum 30 Mb free

Interface: USB

◇General

AC power supply for adapter: 100-240V AC, 50/60Hz

DC power supply for instrument: 12V DC

Dimensions: 238 x 184 x 40 mm (9.37” x 7.24” x 1.57”)

Weight: 2.3 kg (5.07 lbs)

Environmental Conditions

Application field: The instrument is intended for use in medium and high-voltage substations and industrial environments.

Storage temperature: -20°C to 70°C (-4°F to +158°F)

Operating temperature: -20°C to +50°C (-4°F to +122°F)

Humidity: < 95% RH, non-condensing

Safety Qualifications and EMC

Safety: designed in accordance with IEC61010-1, 2006/95/EC

EMC: 2004/108/EC

Sweep Frequency Response Analyzer FRA100 is ideal instrument for detecting mechanical and electrical changes of the core and winding assembly of power transformers.