en 61000-4-11 : 2004 voltage dips short interruptions with ... · netwave 30 3-phase source 3 x 300...
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CONDUCTED RF EQUIPMENT POWER AMPLIFIERS
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EN 61000-4-11 : 2004
Voltage dips short interruptions with PFS and Netwave
Markus Fuhrer EM TEST (swizterland) GmbH, CH-4153 Reinach 16.05.2017
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IEC 61000-4-11 Ed.2 2004-03 IEC 61000-4-34 Ed.1.1 2009-11
Part 4-11/34 : Testing and measurement techniques- Voltage dips, short interruptions and voltage variations immunity tests
up to 16 A more than 16 A
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Definition of sources
Load change in the same electric circuit
Start and breaking characteristic of engines
Short circuits and electrical fault conditions
Switch on of systems with high peak current during start
General is considered in this EMC standard, that the voltage of the upper described sources can not be higher than 100%The standard simulate the following phenomena's:
Voltage dips Voltage interruptions Motorstart
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Changes in IEC 61000-4-11
1- Introduction of a new voltage level for voltage dips: 80% Level
Procedure : Fast switching between 100% and the selected level
Verification: The generator withstand a nominal current of 20A for 5s
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Changes in the standard IEC 61000-4-11
– New test level at 80%
– New times for DIPS ( at 50 / 60 Hz same duration)
– New classes for applications
Class 1 : Protected suppliesClass 2 : Point of common coupling to public network Class 3 : Company internal connection points and industrial environments.
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2- Voltage Variations: New Voltage profile
Old standard 61000-4-11fall and rise time are 2s
This mean that the motor variac perform the voltage changes
Variac output at 70%
Switch from the nominal 100% voltage to the reduced presetted variac voltage with the fast internal switch ( 1-5us).
After 20 ms, a slow voltage increase during 500ms back to the nominal voltage with the motorvariac.
New test standard IEC 61000-4-11 Ed.2
Changes in the standard IEC 61000-4-11
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Voltage DIPS as per IEC 61000-6-1 -2 overview
• IEC 61000-6-2 Industrial
• 1 cycle at 0% criteria B
• 200ms at 40% criteria C
• 500ms at 70% criteria C
• 5000ms at 0% criteria C
• IEC 61000-6-1 household
• 0.5 cycle at 0% criteria B
• 1 cycle at 0% criteria B
• 500ms at 70% criteria C
• 5000ms at 0% criteria C
Generic standard immunity for AC input ports
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• Interruption DIPS 0%, 0.5 cycle Criteria B
• Interruption DIPS 0%, 1 cycle Criteria B
• DIPS 70%, 25 cycle =500ms Criteria C
• Test a sequence of three dips/interruptions with intervals of 10s minimum between each test event.
100
%70
%10s
T [s]
U[%]
Household
Voltage DIPS as per IEC 61000-6-1 -2 overview
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• Interruption DIPS 0%, 1 Cycles Criteria B
• DIPS 40% 10/12 Cycles =200ms Criteria C
• DIPS 70% 25/30 Cycles =500ms Criteria C
• Test a sequence of three dips/interruptions with intervals of 10s minimum between each test event.
Industrial
100 %
70 %
10s
T [s]
U[%]
40 %
Voltage DIPS as per IEC 61000-6-1 -2 overview
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Voltage interruption as per IEC 61000-4-11
t [s]
100 % VT
V (rms) 5000 ms
• Interruption < 5% during 5000ms
• Criteria C
Check of the power on after an interruption.
Hausehold and Industrial as per IEC 61000-6-1/2
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Test procedure as per IEC 61000-4-11
• Each setting with 3 „Events“ with intervals of 10s minimum between each test event.
• For voltage dips, changes in supply voltage shall occur at zero crossings ( 0° and 180°) of the voltage.
• Additional angles considered critical by product committees or individual product specifications preferably selected from on each phase. 45°, 90°, 135°, 180°, 225°, 270° and 315°
• For the short interruption test of three-phase systems, all the three phases shall be simultaneously tested.
• Every representative operating mode must be tested.
• Interruptions and dips occurs in the phases and not in the neutral line.
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Setup with motorized variac NX-1-260-xx
variac NX -1-260-16 compactac NX5 bsp
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Test setup with tapped transformer V 4780 S2
Model V4780 S2 : with manual selection of the taps
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Voltage dips as per IEC 61000-4-11
Correct phase between PF1 and PF2
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Votage interruption as per IEC 61000-4-11
EUT change with different connection power fail simulator connection.
•Interruption high impedance:
The EUT supply Ut is interrupted during the programmed time.
The simulator interrupt the power supply line.
•Interruption low impedance:
The EUT supply Ut is interrupted and switched to 0V. The EUT is shorted and internal buffer capacitors are discharged.
The simulator switches the supply to 0V and makes a short circuit at the EUT input.
0 V
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System for 3-phase DIPS testing
PFS 503N32.2
3-Phase
Power Fail Simulator
Netwave 30
3-phase source3 x 300 V 33 A
Hardware
EUTPublic mains
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System for 3-phase DIPS testing
Blockdiagram Setup for DIPS testing with Netwave
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Dips in 3-phase system IEC 61000-4-11
The EUT shall be tested for each selected combination of test level and duration with a sequence of three dips / interruptions with intervals of 10s minimum ( between each test event ). Each representative mode of operation shall be tested.
For voltage dips, changes in supply voltage shall occur at zero crossings of the voltage, and at additional angles considered critical by product committees or individual product specifications preferably selected from 45°, 90°, 135°, 180°, 225°, 270° and 315° on each phase.
General
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Dips in 3-phase system IEC 61000-4-11
Test procedure : Each phase alone one by one
Exception : All 3 phases simultaneously for short interruptions.
3 phase system with neutraleach individual voltage (phase-to neutral and phase-to-phase) shall be tested. One at a time. This implies six different series of tests.
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Dips in 3-phase system IEC 61000-4-11
3 phase system without neutral
Each phase-to-phase voltage shall be tested, one at a time. This implies three different series of tests.
preferred phase shift
acceptable phase shift
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Dips in 3-phase system IEC 61000-4-11
Not acceptable– phase-to-phase testing without phase shift
In this case a star connected source system reduces the voltage on two phases with a dip.
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Test setup for Delta connection
L3 (PF1)
L2 (PF1)
L1’ (PF2)
Vector diagram of a delta connection transformer with dips with on phase L1 only in a 3-phase system. The dips must be repeated for each phase.
The voltage L2-L3 keeps at 100%. The voltages between the phases L1’-L2 and L1’-L3are vectorially added voltages depends of the tap position in L1’.
Schematic diagram in delta connection
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System for 3-phase DIPS testing
Settings for system in star connection
Phase-to-neutral dip vectorsFor voltage dips test of three-phase systems with neutral, each individual voltage (phase-to neutral) shall be tested, one at a time.
Vector parameters for70% DIPS testsphase to neutral
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System for 3-phase DIPS testing
Settings for system in delta connection
Phase-to-phase dip vectorsFor voltage dips test of three-phase systems with neutral, each individual voltage (phase-to phase) shall be tested, one at a time.
Vector parameters for 70% DIPS tests phase to phase
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Any questions? We are at your disposal!
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59174 Kamen, Germany
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