Overview
CNI 503 3-Phase Coupling Decoupling Network
The three-phase coupling/decoupling networks of the CNI 503x series are used to couple EFT/Burst pulses and Surge pulses on DC-lines or to three-phase (4-wire or 5-wire supply lines) mains supply systems for voltages up to 1,000VDC / 3x690VAC. This includes the more and more common testing of inverters used in the area of renewable energies (e.g. photovoltaic systems, wind power stations, electric cars).
Within the range of EM TEST coupling/decoupling networks we offer different models for test voltages from 5kV up to 10kV with DUT currents of 16A, 32A, 63A, 100A and 200A for the various test requirements and equipment configuration.
Testing of electronic modules with EFT/burst, 1.2/50µs Surge or Ring Wave pulses up to 10kV, 5kA
The CNI 503 couples the surge and burst pulses from the impulses generators UCS 500Nx to a three phase test object (coupling as per. IEC or ANSI standard).
The CNI 503 is controlled from EM Test transient generator of the Series 500 (UCS 500Nx, VCS 500Nx, EFT 500Nx).
Burst, Surge and Ringwave Pulse as per.
- IEC 61000-4-4
- IEC 61000-4-5
- IEC 61000-4-12
- ANSI
Benefits
The CNI 503x-series coupling/decoupling networks are built fully complying to the standard requirements of EN/IEC 61000-4-4 and EN/IEC 61000-4-5. Residual voltage levels are carefully considered as well as the value of the decoupling inductors in order to meet the requirements with regard to voltage drop at the rated current of each type of CDN. Apart from the coverage of the EN/IEC 61000-4-5 standard the CNI 503Bx series also fully complies with the surge test requirements outlined in ANSI/IEEE C62.41.
Being fully controlled by the related generators couplings of the CNI 503x are set automatically as selected for the test (either by manual operation or via software). When performing surge tests the generators will automatically set the required source impedance depending on the standard and the coupling mode.
For CNI 503 coupling networks for DC EUT-supply an optional TEST ON function with a contactor up to 1,500 VDC / >100 A capacity is available.
Operating Functions
Front Panel | |
 Figure 2.1: CNI 503 font view ( model for 4kV ) | |
| 1 | TEST ON | 6 | DUT Output L1/DC+, L2, L3, N/DC-, PE |
| 2 | Switching ANSI -IEC | 7 | Earth plug for EFT burst verification |
| 3 | EFT output to HFK coupling clamp | 8 | LED display Pulse (EFT / 50? HFK / Surge) |
| 4 | HV output for ext. surge coupling networks | 9 | LED display couplings |
| 5 | COM output for ext. surge coupling networks | 10 | EFT input from UCS 500Mx / EFT 500/800 |
1 Button Test On
Press this button to connect the power mains supply to the EUT via the built in relay switch. The yellow light in the button
indicates the switched mains to the EUT.
2 Button ANSI / IEC (Option)
This button changes the coupling between ANSI coupling and IEC coupling.
 | LED disabled: | IEC coupling | 2Ω L-L or L-N 10Ω L-PE, N-PE |
| LED enabled: | ANSI coupling | 2Ω all couplings |
Rear view | |
  | |
| 1 | EUT power L1, L2, L3 | 5 | HV Input from generator |
| 2 | EUT power N | 6 | COM Input from generator |
| 3 | EUT power PE | 7 | Power switch with fuse |
| 4 | Ground Reference | 8 | Voltage selector 230V / 115V |
| 5 | HV Input from generator | 9 | CN control input from UCS generator |
| 10 | CN control input from EFT and or VCS generator |
Figure 2.3: Front Side CNI 501 S1 with AC / DC Switch
Figure 2.4: CNI 501 S1 Rear Side
