
7
2.2 Pulsed magnetic fields (option)
Tests with pulsed magnetic fields, or PULSEM tests, simulate the type of interference
produced by surge pulses as a result of lightning strikes to buildings and other metallic
structures such as freestanding masts, ground conductors, grounding networks, etc. as
specified in IEC / EN 61000-4-9. Magnetic fields of this type can upset the operation of
installations that find themselves within such fields. The NSG 3150 performs this test by
causing a heavy current to flow in a magnetic field coil such that the amplitude of the pulse
current produces a proportional field within the coil parameters.
The magnetic field coils, available as accessories, are connected to the surge pulse output
socket via an INA 753 pulse shaping network.
With the NSG 3150 it is possible to create magnetic fields much higher than
required in the
IEC / EN 61000-4-9 standard
. It is in the scope of the user to
test only inside the Standard requirements