LISN Line Impedance Stabilisation Networks / AMN Artificial Mains Network
LISN Line Impedance Stabilisation Networks / AMN Artificial Mains Network
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A LISN Line Impedance Stabilization Networks / AMN Artificial Mains Network
- supplies the neccessary mains voltage (AC or DC) and current for the Equipment under Test (EuT).
- couples interference voltage generated by the EuT and supplies it to the receiver.
- provides well defined RF-impedance to the Equipment under Test (EuT)
- keeps away unwanted disturbance coming from mains (filter)
- protects the mains from unwanted disturbance voltage generated by the EuT
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Figure 1: Measurement setup conducted disturbances
We can distinguish three types of LISN: V-, T- and Delta-LISN
Figure 2 shows the voltage relationship of a two-line-system with separate ground.
The V-LISN measures the unsymmetric disturbance voltage between the two lines L1 and ground or L2 and ground respectively. V-LISN are also called V-ANM (Artificial Mains Network). The V-LISN is by far the most commonly used LISN.
There are two types of V-LISN with different impedances. The V-LISN with a 5μH inductance (CISPR 16-1-2, CISPR 25, ISO 7637, DO160) are normally used to measure equipment for vehicles, boats and aircrafts connected to onboards mains with DC or 400 Hz. The other Type of V-LISN with 50 µH according to CISPR 16-1-2, MIL STD 461 and ANSI C63.4 is intended to operate at mains frequencies of 50 Hz or 60 Hz.
The T-ISN (Figure 2 right) measures the asymmetric disturbance voltage (common mode voltage) and provides it to an EMI Receiver. T-ISN is normally used for measuring telecommunication and data transmission equipment connected to symmetrical lines as e.g. twisted pairs..
Figure 2: LISN / AN Topology
Schwarzbeck LISN overview
Accessories for LISN
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CMDM 8700 Common mode / Differential mode switch
The measurement mode switch CMDM 8700 B expands the measurement possibilities of two V-LISN to T- and Delta-LISNs for the profound analysis of interference emissions.
Frequency range: 9 kHz - 108 MHz
Measurement modes: Line A, Line B, Common mode, Differential mode
Connectors: BNC (50 Ohm)
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HVSE 8600 / HVSE 8601 Shielded Enclosure for Automotive LISN
The HVSE 8600 Shielded Enclosure (Shielding Box) was designed to increase the shielding effectiveness of automotive LISN significantly, which is neccessary for measurements of electric- or hybrid vehicles.
Material: Aluminium
Shielding Effectiveness: typ. > 100 dB
HVSE 8600 is suitable for the following LISN types:
NNHV 8123,
HVSE 8601 is suitable for NNHV 8123-800
Further Information about the application of the shielded enclosure can be found in CISPR 25 Ed. 4 or e.g. in the manufacturer specific standard BMW GS 95025-1.
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KA 812x
Calibration adapters for artificial mains networks AMN or LISN
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Wiring accessories for LISN
Wing terminals hook and ring type cable lugs and connecting accessories for LISN
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CEKON
CEKON CEE three- phase current connector plug jack 16 A and 32 A.
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SCHUKO
Adapter Schuko plug, receptacle for Great Britain, Singapore, Hong Kong, Switzerland, Australia, New Zealand, USA, Canada, Japan, Taiwan...
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CAP 0.9-400
In order to be compliant to the standards ECE R10.06, CISPR 12 and PSA (which require a capacitance of in total 1 uF parallel to a resistance of 1 MΩ at the input side of the LISN) a 0.9 μF capacitor like the CAP 0.9-400 has to be connected to the mains terminals of the NNHV 8123-400 or NNHV 8123-800 LISN.
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CAP 10 / CAP 10 8226-2
To be compliant to the standards DEF STAN 59, DO 160 or MIL 461F ( Method CS 101-4; CS106-3) a 10 μF capacitor like the CAP 10 has to be connected to the mains connectors of the LISN.
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Artificial Hand
Artificial hand according to CISPR 16-1-2 (RC combination 510 Ω + 220 pF) in housing with banana plug and copper foil.
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ISN / T-Networks
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NTFM 8131 AThe "Impedance Stabilisation Network NTFM 8131 A", also known as T-ISN, is used to measure the asymmetrical interference voltage on symmetrical data or telecommunication lines. Since 2002 the T ISN is used for measurements of the asymmetrical disturbance voltage according EN 55015 (electrical lighting equipment). Furthermore it can be used for measurements according to CISPR 32. In contrast to the widely used T-ISN the NTFM 8131 A was designed to withstand 400 V AC a maximum current of 3 A.
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NTFM 8158
ISN T8 CAT6 (LCL = 75 dB) acc. CISPR 22 edition 5.2 figure D.3. for up to 4 pairs UTP.
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8158 Mag Base
Magnetic fixture for NTFM 8158
The magnetic fixture „8158 Magbase“ can be used to fix a NTFM 8158, a CAT5 8158 or a CAT3 8158 to a steel wall vertically. It is capable of holding approximately 2.5 kg whereas the ISN mentioned above weigh not even 500 g.
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CAT5 8158
ISN T8 CAT5 (LCL = 65 dB) acc. CISPR 22 edition 5.2, figure D.3. for up to 4 pairs UTP.
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CAT3 8158
ISN T8 CAT3 (LCL = 55 dB) acc. CISPR 22 edition 5.2, figure D.3. for up to 4 pairs UTP.
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ISN S8
ISN for screened RJ45 or RJ11 connections, 2, 4 or 8 wire, acc. D.11 CISPR 22 Ed.5.2.
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ISN S1
ISN acc. CISPR 22 Ed.5.5:2006, Annex D, D9 for coaxial lines
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Special - LISN
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NPLC 8500
The LISN NPLC 8500 has been designed espacially for PLC measurements according to ITU-T G.9901. Frequency range: 3 kHz - 148.5 kHz Max. terminal voltage: 250 V AC / 50 Hz Max. current: 16 Arms AMN Impedance: 1 Ohm
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PVDC 8300
PV LISN 1500 V 50 A common mode impedance 150 Ohm Z differential mode = 150 Ohm air coils 280 microhenry PVDC 8300 Opt. Fans Fans for a maximum continuous current of 100 A
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PVDC 8301
PV-LISN for the DC side of grid connected power converters GCPC. 1500 V 200 A common mode impedance = 150 Ohm differential mode impedance = 150 Ohm air coils 280 microhenry
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TEMP 8400
Tempest LISN 9 kHz to 1 GHz 2 path model 16 A N-connectors for DuT power supply and N-connectors for the 2 measurement ports. The unit allows to listen to even the smallest signals on power lines.
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TEMP 8401
Adapter N-male to wing terminals for TEMP 8400 |
LISN according to MIL 461 MIL 462
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NNBL 8225
V-LISN (9) 150 kHz - 100 MHz (50 µH + 5 Ω) || 50 Ω 20 A 50 Hz AC 250 V 400 Hz AC 140 V single path Mil. Std. 461/462
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NNBL 8226
V-LISN (9) 150 kHz - 100 MHz (50 µH + 5 Ω) || 50 Ω 70 (100) A 50 Hz AC 250 V single path Mil. Std. 461/462
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NNBL 8226-HV
V-LISN (9) 150 kHz - 100 MHz (50 µH + 5Ω) || 50 Ω 70 (100) A 50 Hz AC 800 V single path Mil. Std 461/462
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NNBL 8226-2
V-LISN (9) 150 kHz - 100 MHz (50 µH + 5 Ω) || 50 Ω 70 (100) A 50 Hz AC 250 V two path Mil. Std. 461/462
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NNBL 8229-HV
V-LISN (9) 150 kHz - 100 MHz (50 µH + 5 Ω) || 50Ω 200 A 50 Hz AC 800 V / DC 1000 V single path MIL STD 461 E
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NNBL 8230
V-LISN (9) 150 kHz - 100 MHz (50 µH + 5Ω) || 50Ω 300 A 50 Hz AC 250 V single path Mil. Std. 461/462
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NNBL 8240
V-LISN (9) 150 kHz - 100 MHz (50 µH + 5Ω) || 50Ω 800 A (1000 A) 1000 VCD / 250 VAC (50/60 Hz) single path Mil. Std. 461E
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LISN - Automotive -
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Single path LISN (Automotive) CISPR 25 / ISO 7637
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NNBM 8124
Automotive LISN acc. CISPR 25 and ISO 7637-2 and for BCI-Testing Impedance (5µH + 1 Ohm) || 50 Ohm Max. 70 (100) A With switchable 50 Ohm load and switchable 1 mikrofarad capacitor at mains side single path BNC female connector
Option N connector: N-female connector instead of BNC.
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NNBM 8124-200
Automotive LISN acc. CISPR 25 and ISO 7637-2 and for BCI-Testing Impedance (5µH + 1 Ohm) || 50 Ohm Max.200 A With switchable 50 Ohm load and switchable 1 mikrofarad capacitor at mains side, single path BNC female connector
Option N connector: N-female connector instead of BNC
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NNBM 8124-400
Automotive LISN acc. CISPR 25 and ISO 7637-2 and for BCI-Testing Impedance (5µH + 1 Ohm) || 50 Ohm Max. 400 A. With switchable 50 Ohm load and switchable 1 mikrofarad capacitor at mains side, single path BNC female connector
Option N connector: N-female connector instead of BNC.
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NNBM 8124-800
Automotive LISN acc. CISPR 25 and ISO 7637-2 and for BCI-Testing Impedance (5µH + 1 Ohm) || 50 Ohm Max. 800 A. With switchable 50 Ohm load and switchable 1 mikrofarad capacitor at mains side, single path BNC female connector
Option N connector: N-female connector instead of BNC.
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NNBM 8126 A 890
LISN 5 µH || 50 Ohm 70 (100) single path Suitable for 600V DC and 270 V AC 890 Hz Calibrated up to 400 MHz according to DO-160
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NNBM DO160-1500
The main application of the unsymmetrical single path AMN (artificial mains network) NNBM DO160-1500 is the measurement of interference voltage in vehicles, aircrafts and ships in the HF-VHF range 0.1 - 400 MHz.
The impedance characteristic is realized according to DO-160 and DEF-STAN-59 5 μH || 50 Ω.
Max. cont. current: 200 A
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BAN Broadband Artificial Networks acc. ISO 11452-7 or DC-10614
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BAN 8508
BAN broadband artificial network 2 A - 8 A acc. ISO 11452-7 or DC-10614
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BAN 8530
BAN broadband artificial network 8 A - 30 A acc. ISO 11452-7 or DC-10614
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DC-Block 500
DC-blocking capacitor BNC for direct injection with BAN
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HV-LISN acc. to CISPR 25 Ed. 4 or BMW GS 95025-1
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NNHV 8123
High Voltage LISN acc. to CISPR 25 Ed. 4 or BMW GS 95025-1 to measure the conducted disturbance voltage on shielded lines for (hybrid) electric vehicles (HEV, EV), can be used for BCI with an external dummy load impedance (5µH) || 50 Ohm 70 (100) A 1000 V (DC) Backside with built in 0.1 microfarad capacitor to ground N-jack Normally used in pairs inside the enclosure HVSE 8600!
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NNHV 8123-200
High Voltage LISN acc. to CISPR 25 Ed. 4 or BMW GS 95025-1 to measure the conducted disturbance voltage on shielded lines for (hybrid) electric vehicles (HEV, EV), can be used for BCI with an external dummy load. impedance (5µH) || 50 Ohm 200 A 1000 V DC Backside with built in 0.1 microfarad capacitor to ground N-jack Normally used in pairs inside the enclosure HVSE 8600!
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NNHV 8123-400
High Voltage LISN acc. to CISPR 25 Ed. 4 or BMW GS 95025-1 to measure the conducted disturbance voltage on shielded lines for (hybrid) electric vehicles (HEV, EV), can be used for BCI with an external dummy load. impedance (5µH) || 50 Ohm 400 A 1000 V (DC) Backside with built in 0.1 microfarad capacitor to ground N-jack Normally used in pairs inside the enclosure HVSE 8600!
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NNHV 8123-400R The main application of the unsymmetrical single path AMN (artificial mains network) NNHV 8123-400R is for the measurement of interference voltage for electromobility purposes according to CISPR 16 1 2, CISPR 25 edition 4 or BMW GS 95025-1 in the HF-VHF range 0.1 MHz – 150 MHz utilizing shielded cables. It can also be used for BCI tests using an external 50 Ω termination.
Normally used in pairs inside the enclosure HVSE 8600!
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NNHV 8123-800
High Voltage LISN acc. to CISPR 25 Ed. 4 or BMW GS 95025-1 to measure the conducted disturbance voltage on shielded lines for (hybrid) electric vehicles (HEV, EV), can be used for BCI with an external dummy load. impedance (5µH) || 50 Ohm 800 A 1000 V (DC) Backside with built in 0.1 microfarad capacitor to ground N-jack Normally used in pairs inside the enclosure HVSE 8601!
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Accessories for automotive LISN
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HVSE 8600 / HVSE 8601 Shielded Enclosure for Automotive LISN
The HVSE 8600 / HVSE 8601 Shielded Enclosure (Shielding Box) was designed to increase the shielding effectiveness of automotive LISN significantly, which is neccessary for measurements of electric- or hybrid vehicles.
Material: Aluminium
Shielding Effectiveness: typ. > 100 dB
HVSE 8600 is suitable for the following LISN types: NNHV 8123, HVSE 8601 is suitable for NNHV 8123-800.
Further Information about the application of the shielded enclosure can be found in CISPR 25 Ed. 4 or e.g. in the manufacturer specific standard BMW GS 95025-1.
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CAP 10 / CAP 10 8226-2
To be compliant to the standards DEF STAN 59, DO 160 or MIL 461F ( Method CS 101-4; CS106-3) a 10 μF capacitor like the CAP 10 has to be connected to the mains connectors of the LISN.
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KA 812x
Calibration adapters for artificial mains networks AMN or LISN
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V-LISN CISPR 16-1-2
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