Transient Generator Rental - Immunity Test Equipment
Combination wave surges are tested to IEC 61000-4-5 and ANSI C62.41 with verifying test levels depending upon the EUT/DUT. These surges have both current and voltage waveform requirements that are met for compliance. Typically, this test is a power on test, where when testing AC lines, the phase angle is selected in accordance with the underlying standard.
Electrical fast transient (EFT) are series of quick pulses is applied (burst) to power lines or data lines, typically done to IEC 61000-4-4 test levels.
This is commonly done with surge testing and helps determine an EUTs ability to withstand a variety of occurrences including connection and disconnection to power mains. Burst testing is a much faster pulse then combination wave surge, with a rise time and duration in the nanosecond range. We offer rentals of a variety of different transient generators each offering capabilities of applying EFT pulses to both AC and DC power lines.
Transients are fast, high energy, non-continoues voltage and/or currnet pulses that are used to replicate many EMI environmental issues including lightning strikes, equipment disconnection, and power grid switching.
Commercial transient test systems are based around a series of EMI pulses, the most common being surges (combination wave), electrical fast transients (EFT), as well as ringwave. These generators are typically separated by a roughly 4kV and 6kV test level range, with 6kV system ringwave and other options are typically selected as well. The setup for transient testing can vary depending upon the underlying standard, on the left you will find a typical setup provided by EM Test NX5 user manual.
The equipment required will also be determined by the type of line being tested, commonly power or data lines. For many applications, this will require the use of a coupling decoupling network, or CDN, which provides the capability to inject the pulse onto the associated cabling. We offer rentals of a variety of different CDNs as well as capacitive coupling clamps and associated pulse verification accessories.
Testing for automotive conducted immunity to transients is commonly done to ISO 7637-2 and ISO 16750-2 pulses, as well as OEM specific requirements. The most common automotive pulses include interruptions, microburst/EFT, as well as load dump pulses. Equipment can be designed modularly, as with the EM Test series or as an all-in-one solution as with theTeseq NSG 5500platform as seen in the image on the left.
When conducting power on testing it is necessary to use a programmable battery supply or battery simulator to provide power to the DUT as well as have capabilities to modify pulses. The battery simulator is also required for voltage drop testing as well as negative pulses, and are typically rented in conjunction with the associated pulse generator.
As a leader in the automotive EMI test equipment rental industry, we carry a variety of test equipment to meet both international and OEM pulse requirements.
Testing for transient susceptibility is commonly done to MIL-STD-461 CS115, CS116, CS117 as well as RTCA/DO-160 Section 22 for lightning. Many of the most common susceptibility tests include damped sinusoidal pulses as well as double exponential pulses at verifying frequencies and test levels. Pulse verification is typically required prior to testing, the image below shows how this is accomplished with the EMC Partner AVI3000.
We offer rentals of both the transient generators, as well as associated equipment including current monitoring probes, line impedance stabilization networks, and injection devices, providing a complete test solution to many susceptibility tests.