EFTs (electrical fast transients)/burst commonly seen in electrical systems and equipment are generally high-frequency pulses caused by sparking. These sparks occur during circuit connection or disconnection from a power supply, switchgear operation, or when lines touch each other.
EFT/burst simulators are used for evaluating the performance of electrical and electronic
equipment power supply port, signal, control, and grounding ports when subjected to electrical fast transient burst interference.
IEC 61000-4-4 is under the Electromagnetic Compatibility (EMC) directive and is designed to test fast transients and burst events in electronic systems.
The preferred test levels for the electrical fast transient test, applicable to power, control,
signal and earth ports of the equipment are given below:
The simplified circuit diagram of the generator is given as following:
Burst duration/period. The standard specifies testing at both 5kHz and 100kHz frequency every 300 ms.
EFT testing can be conducted on both AC and DC power supply lines, signal, earth, and control ports. An EFT test set-up consists the following:
1) Test generator
2) Coupling/decoupling network (CDN)
3) Equipment under test (EUT)
4) Ground reference plane (GRP)
5) Insulating support
6) Grounding cable
To test AC/DC supply ports, a CDN is required. And a capacitive coupling clamp is needed for testing signal, data, control, or I/O ports.
EMCSOSIN EFT S/T series are the state-of-the-art EFT/Burst testers with a built-in coupling/ decoupling network for single phase or three-phase mains supply line and a HV terminal to connect a capacitive coupling clamp. Equipment performance fully comply with IEC/EN 61000-4-4 standard.
Please do not hesitate to contact us if you need more of the EFT test system.
