1. N4L Ltd. (UK) EMC IEC61000 COMPLIANT TEST SOLUTIONS
Precision Measurement Instrumentation
UK Based, est. 1997
EMC IEC61000 COMPLIANT TEST SOLUTIONS

2. Company Overview Relocated to new manufacturing facility April 2015
Location : Leicester, UK
3x Increased manufacturing capacity
Improvements to Calibration facility
Stable platform for N4A Power Source production
Continuous Innovation

3. EMC Test Solutions 3kVA ~ 67kVA Test Systems Full Compliance
In house ISO17025 [UKAS] Laboratory, Calibration of IEC , IEC , IEC and IEC
AC Source Compliance to IEC , IEC
Future upgrade schedule to include a complete suite of IEC61000 standards
Intuitive Software
100% coverage of IEC and IEC standard via ISO17025 calibration

4. ISO17025 Calibration
A distinct advantage of N4L EMC test solutions is the calibration capability of N4L’s internal ISO17025 test laboratory based at the UK headquarters. This facility features both commercially available ISO17025 calibration equipment as well as proprietary ISO17025 accredited test equipment designed in house, by N4L.

5. IEC , IEC and IEC
IEC [Testing and Measurement
Techniques – Harmonics and Interharmonics]
defines the requirements of the harmonic
Analyzer.
It is important that any harmonic analyzer
claiming compliance to IEC /12 is
fully compliant to IEC , including
proof of the same.
N4L have developed a complete test
suite to verify compliance to IEC
This procedure exceeds the verification
level commonly found on the market.

6. IEC
The IEC calibration procedure provides evidence of compliance for an analyzer to measure an EUT against the limits specified in IEC and IEC

7. IEC and IEC
An important aspect of any compliant test system is the HMI(Human Machine Interface)
N4L have spent many years developing and improving the IEC /12 user interface which has matured into an intuitive, comprehensive analysis and review mechanism for the test engineer.
Features such as real time pass/fail flags, live graphical update of limit levels, data point export for complete test “replay”, as well as a thorough reporting function.

11. IEC
The IEC standard describes the requirements for
Flicker meters, this standard is notoriously difficult to provide traceable
verification of the various specified parameters.
N4L have developed thorough test procedures, utilising both
commercially available test equipment (eg. Fluke 6105A) with customised
voltage sequencing events as well as proprietary N4L signal generation
equipment (N4A02-FLICKER SOURCE) which is also utilised for “d
parameter” compliance testing.
All tests are included within N4L’s ISO17025 UKAS scope of
accreditation

12. IEC

14. IEC and IEC
The IEC and IEC standards state the limits and test procedures for flicker compliance.
IECSoft’s Flicker measurement mode incorporates an intuitive step by step style setup procedure, guiding the user through the test configuration.
Remote control of the N4L N4A AC Power Source is handled automatically by IECSoft, test procedures include selection of d[t] parameters and calculation of Ztest if necessary. Pinst, IFS, PST, PLT, D, Dmax, Dc and Tmax are also updated during any test.

16. IEC61000-3-3 and IEC61000-3-11 Inrush (dmax) testing
For products utilising manual switching as a method of initiating and ending operation, a “dmax” test known as the “Inrush test” is required.
This involves a succession of 24 switching events that are recorded and the arithmetic mean (excluding the highest and lowest dmax values) is calculated.
An intuitive user interface has been developed for this task which guides the test engineer through the process and provides prompts to perform the switching event.
Statistical analysis is also automated within the software, removing this burden from the user. This results in reduced test times and eliminates the risk of a mathematical error.

17. Export to Excel

18. Flicker Simulation
The N4A series of AC Power Source feature the ability to generate flicker waveform sequences.
Useful for verification of Flickermeters
Confirms connections to AC source are OK

19. Amplifier Topology for IEC61000-4-11 and IEC61000-4-13 compliance
Unique switching output technology provides typical output distortion (THD) of 0.1%
Ability to generate AC + DC
1kHz full signal bandwidth

20. User Interface Most parameters accessible from main screen
Use “Home” button to activate the onscreen menu, then <>
Ability to change Voltage, Frequency, adjustment parameters, output ON/OFF, sense, waveform type and coupling from main screen
More complex parameters in separate menus ^ ^

21. THD of Sinusoidal Output
Typical <0.1% THD (critical for IEC61000 compliance testing)
Measurement of output utilising PPA5500
PPA5500 benefits from isolated input, eliminating requirement for differential probe + oscilloscope
230Vrms, 50Hz Sinusoidal Output

22. Square Wave Generation
Ability to generate high frequency square waves due to bandwidth up to 15kHz.
50Hz Square wave, excellent signal
integrity
500Hz square wave, good signal integrity within 3V/us slew rate limitation

23. Triangle Wave Generation
50Hz triangle wave, excellent signal
integrity
500Hz triangle wave, excellent
signal integrity

24. Harmonic Synthesis
All N4A units feature the ability to generate harmonics up to 10kHz
N4A units are calibrated up to 10kHz
IEC Harmonic/Interharmonic standards
Example: Fundamental 500Hz, 7th Harmonic Generation 20Vrms

25. 230Vrms, 500Hz Fundamental 20Vrms 7th Harmonic (3.5kHz)
Harmonic Synthesis
230Vrms, 500Hz Fundamental 20Vrms 7th Harmonic (3.5kHz)
230Vrms, 50Hz Fundamental
20Vrms 7th Harmonic (350Hz)

26. IEC61000-4-11 Compliance testing
As mains supply lines can suffer from harmonic and interharmonic interference, IEC defines the harmonic and interharmonic levels upon which products must be tested. IECSoft provides a simple user interface to create test programmes for each class of product

27. IEC61000-4-11 Compliance testing

28. IEC61000-4-11 Compliance testing

29. IEC Example
In this example, the N4A is programmed to produce compliant waveforms to IEC Example Class 1 230Vrms reference Voltage waveforms are shown below
Class 2 – 0% during 0.5 cycle
Class 2 – 0% during 1 cycle
Class 2 – 70% during 25 cycles

30. IEC61000-4-13 Harmonic and Interharmonic susceptibility testing
As mains supply lines can suffer from harmonic and interharmonic interference, IEC defines the harmonic and interharmonic levels upon which products must be tested. IECSoft provides a simple user interface to create test programmes for each class of product

31. IEC61000-4-13 Harmonic and Interharmonic susceptibility testing

33. Power Analyzer Technology
Best Phase Accuracy in Market (0.003deg)
Best High Frequency response in Market
Most comprehensive calibration protocol in Market
UKAS Calibrated upon supply (Only manufacturer to provide ISO17025 as standard)
Only Power analyzer Manufacturer to be accredited to ISO17025 for IEC and IEC
Unique “Planar” current shunt design
Real time “no gap” analysis
Continuous high sample rate, regardless of fundamental frequency (2Ms/s – PPA5500)

34. Power Analyzer Models

35. N4L Measurement Technology
Traditional Approach
N4L Approach

38. N4L Current Shunt Design

39. Field Cancellation

43. Calibration

44. The total EMC Compliance Package
IEC
IEC
IEC
IEC
IEC
IEC
IEC
IEC

45. Thank you Any Questions?
High Precision Measurement Instrumentation