IEC Flicker Impedance
12KVA
Three Phase
16 Arms/Phase
IEC 60725 Compliant
M6204 IEC Flicker Impedance
Standard Features:
• Three Phase Flicker Impedance Network
Supports both single and three phase
icker testing of UUT’s up to 16Arms per
phase
• Z
Impedances Values per IEC 60725
ref
Line Impedance: 0.24 Ω+ 0.15 j
Neutral Impedance: 0.16 Ω + 0.10j
• Compatible with 360AMXT and 3120AMXT
AC Source Models
IEC Impedance is matched to AC Source
Output impedance for exact IEC 60725
matching
• High Qualify Impedance Components Used
Low Thermal Drift and Forced Air Cooling
while under Load Ensures Constant Flicker
Impedance during Long Flicker Test Runs
• Dual Connectors on Rear Panel
Multiple Terminal Blocks Provided for
Power, Voltage Sense and Power Analyzer
Connections Simplies Connections
• Standard 19” Rack Mount Enclosure
Fits easily on Lab Bench, on top of the AC
Power Source used or in an Instrument
Cabinet
Ω
Ω
Standards Supported:
• IEC 61000-3-3 / EN 61000-3-3
• IEC 61000-4-13 / EN 61000-4-13
• IEC 61000-4-27/ EN 61000-4-27
• IEC 60725
IEC Flicker Impedance
The M6204 unit provides the requisite lumped impedance between the AC Power
Source and the Unit Under Test (UUT) used to test for icker compliance to IEC 610003-3. Designed to meet IEC 60725 - Consideration of reference impedances and public
supply network impedances for use in determining the disturbance characteristics of
electrical equipment having a rated current ≤75 A per phase – the M6204 simulates
the typical public utility impedance characteristics found in most European countries
in order to provide a common icker measurement reference.
Three Phase and Single Phase UUT Testing
A separate impedance network in the Neutral leg ensures full compliance to IEC
61000-3-3 and IEC 60725 even under imbalanced three phase load conditions. The
same three phase Impedance network is also fully capable of supporting single
phase Flicker test. In this case, the Phase A impedance and Neutral impedance
combine together to provide the required Z
impedance.
= 0.40 Ω + 0.25 j Ω single phase
ref
Full 16 Arms per Phase Capable
The use of high quality components with low thermal drift and high saturation
resistance ensures a stable impedance network throughout the entire icker test
duration – typically two hours. This is augmented by ecient yet quiet forced
air cooling. Testing to the full 16 Arms per phase as required for products that
fall under the IEC 61000-3-3 Flicker Standard is fully supported by this lumped
impedance with ample margin for temporary overload conditions.
AC Source Matched
The M6204 impedance is factory calibrated and matched to the AMX AC Power
Source Model it is used with. This ensures that the combination of AC Source
Output Impedance and Lumped Impedance adds up to the requisite IEC 60725
Impedance values. This prevents unwanted system level errors that can occur
when the IEC Flicker Impedance is sourced from a dierent vendor as the AC
Power Source.
The Leader in AC Power Technology
An early pioneer in the development solid-state power conversion equipment,
Pacic Power Source continues to develop, manufacture, and market both linear
and high-performance PWM AC Power Sources. Pacic’s reputation as a market
and technology leader is best demonstrated by its continuing investments in
both research and development and world-wide customer support. With corporate owned oces in the United States, Germany, the United Kingdom, and China,
local personalized support is always available.
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IEC Flicker Impedance
Applications
Flicker Testing
The M6204 IEC Flicker Impedance provides the required lumped impedance to create a Flicker test system consisting of
a Programmable AC Power Source, an IEC compliant Flicker Meter or Power Analyzer with Flicker measurement mode
and the required lumped impedance between the AC Source and the UUT. The IEC Flicker standard is based on analyzing
voltage uctuations caused by changes in UUT load current working against a reference impedance (Z
sen to simulate the typical public utility impedance found in Europe. An incorrect or out of tolerance Flicker Impedance
can lead to signicant errors in Flicker measurement results.
Requirements for the IEC Flicker Impedance when testing UUT’s with Currents up to 75 Arms per phase are covered by
IEC Standard 60725, currently at revision 3.0. For UUT’s with phase currents of 16 Arms per phase or less (either single
or three phase UUT’s), the required Z
lowing nominal values:
is dened as a combination of resistive and inductive components with the fol-
ref
Phase Impedances: ZL = 0.24 + j0.15 Ω each phase
Neutral Impedance: ZN = 0.16 + j0.10 Ω
). Z
ref
was cho-
ref
For single phase applications, the Phase A and Neutral impedance combine to provide the required single phase Z
Z = 0.40 + j0.25 Ω so the same M6204 Impedance can be used for either single or three phase Flicker testing.
Other IEC Test Standards
The same IEC Flicker impedance is also called out to be used during other IEC Tests. Examples of some of these IEC Test
Standards are shown in the table below.
IEC Reference Descritption
IEC 61000-4-13 Harmonics and Inter Harmonics Immunity Test
IEC 61000-4-27 Unbalance, immunity test for equipment with input current not exceeding 16 A per phase
The M6204 Impedance is compatible with these IEC 61000-4 Immunity test standards.
Benets
High Quality
• The M6204 IEC Flicker Impedance is constructed of high quality resistive and inductive components sized to handle
load currents up to 16Arms with ease. Proper heat sinking and forced airow ensure stable operation over a wide
temperature range, even under full load conditions that can persist for many hours. The same impedance module
can be used for either Single phase or Three phase UUT Flicker testing without the need to rewire or re-congure.
Lumped Impedance
• Compared to “synthesized or electronic” impedance solutions as employed by some manufacturers, the M6204 provides the required separate Neutral Impedance which is not available on AC Sources with synthesized impedance.
This ensures accurate Flicker measurement results under all circumstances, including unbalanced three phase load
conditions caused by the UUT.
• Furthermore, synthesized impedance circuits often have a limited frequency range and may closely approximate
the required impedance at 50Hz but will not accurately simulate the eect of higher current harmonic frequency
components present in UUT current for non-linear loads. A lumped impedance like the M6204 does not have such
a frequency dependency and will correctly respond to current harmonics.
ref
of
AC Source Matching
• Since most AC Power Sources have a non-zero output impedance, adding the lumped impedance to an AC Source
will have a cumulative eect resulting in an overall combined output impedance to the UUT that will exceed the actual Z
test where it otherwise would have.
• By obtaining both the AC Power Source and the IEC Flicker Impedance from the same manufacturer, you can be
sure both are matched. This means the lumped impedance as well as the AC Source output impedance is adjusted
to ensure the combined impedance is within Z
value. This will result in overstated Flicker measurement results that may lead to an UUT not passing Flicker
ref
tolerances.
ref
IEC Flicker Impedance
Ratings
M6204
IEC Impedance
Parameter Specication Unit Conditions
Resistive
Phase A 0.24
Phase B 0.24
Phase C 0.24
Neutral 0.16
Accuracy ± 0.002
Inductive
Phase A 0.15j
Phase B 0.15j
Phase C 0.15j
Neutral 0.10j
Accuracy < 2%
Voltage
Max. 300.0 Vrms
Current
Max. 16.0 Arms
Power
Max. 4000 VA / W Per Phase
Terminals
AC Input - Power Source 3 Phase + Neutral Terminal Block -1 Rear Panel, Connect to AC Source Output
AC Output - UUT 3 Phase + Neutral Terminal Block -3 Rear Panel, Connect to UUT AC Input
AC Voltage Sense 3 Phase + Neutral Terminal Block -2 Rear Panel, Connect to AC Source External Voltage Sense
AC Output - UUT Sense 3 Phase + Neutral Terminal Block -4 Connects to Flicker Meter or Power Analyzer Inputs
Cooling Fan Power Cable Harness J20A/P20A Interface Cable to AC Source Included
Ground Screw Stud GND Chassis Ground Required
No of Terminal Positions Designator
Ω
Ω
Ω
Ω
Ω
Internal Calibration
Ω
Ω
Ω
Ω
Recommended Wire Size: 6 AWG
Recommended Wire Size: 6 AWG
Recommended Wire Size: 20 AWG
Recommended Wire Size: 20 AWG
Input Power Requirments
DC Input
Parameter Specication Unit Conditions
Fan
Voltage (nominal) 24
Current @ 24 Vdc 0.28 Adc
Fan Axial Dual Ball bearing
Size 120 mm
1
If a NON Pacic Power Source AC Power Source model is used with the M6204, an external 24Vdc supply capable of supplying 280 mAdc @ 24Vdc is required to oper-
ate the Fan.
Vdc
DC Power provided by AC Power Source through included P20A/J20A Interface cable.
IEC Flicker Impedance
19" (483mm)
M6204 IEC Flicker Impedance front and rear views
General/Environmental
Ambient Temperature
Operating: 0° - 50° C
Storage: -20 ° - 80° C
3U
5.25”,
133 mm)
Chassis
Chassis ( W x H x D)
Cabinet Mount
Cooling
Front Panel Controls
Rear Panel
Connections
16.75" (425mm)
Mechanical Specications
19” Rack Width
Type
16.75” x 5.25” x 23.5”
425 x 133 x 597 mm
Width including Rack Ears: 19” / 483 mm Depth
Rack Slide Mounting Holes on Side of Chassis
or L Bracket support required
Fan Cooled, Single 120mm dual ball bearing fan,
24Vdc, 0.28Adc rated.
None
Terminal Blocks
Cable
Power
Voltage Sense TBM6204-2 / TBM6204-4
3U Rack Mount
TBM6204-1 / TBM6204-3
J20A / P20A
Ordering Information
Model Description
M6204
Order Example
M6204
• 3 Phase, 12KVA, IEC Lumped Impedance Network
© 2013 Pacic Power Source, Inc. Subject to change without notice.
3 Phase, 12KVA, IEC Lumped Impedance
Network
Requirements
Use with Programmable AC Power Source. Pacic
Power Source Recommends AMX Series Linear
Models for Harmonics and Flicker test systems.
Typical Delivery Items
Ship Kit:
• User Manual
Available Models
M6204
17692 Fitch, Irvine, CA 92614 USA
Phone: +1 949.251.1800
Fax: +1 949.756.0756
Toll Free: 800.854.2433
E-mail: sales@pacicpower.com
www.pacicpower.com
#4DS-IECIMP Rev062013
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