ATEC carries a wide range of magnetic field generators at affordable rental rates to aid in all electromagnetic immunity testing. ATEC's selection of magnetic field generators includes devices from leading manufacturers like EMC Partner, Haefely, and PMM.
What is Magnetic Field Testing?
Magnetic field testing determines whether an item is vulnerable to a nearby magnetic field. Electromagnetic Fields (EMF) are present throughout the world and are significantly more powerful coming from electrical equipment. Exposure to these magnetic fields can cause destructive or even dangerous effects to the product and user.
Magnetic field testing is performed to test the magnetic resistance of electronic equipment in settings like high-voltage substations, facilities, and vehicles, ensuring they are resistant to transients. Magnetic transients can cause faults in video displays, hall effect sensors, and other sensitive devices.
During testing, a transient generator designed to meet test standards like IEC 61000-4-8, IEC 61000-4-9, and 61000-4-10 is used in conjunction with a coil to simulate a magnetic disturbance. Magnetic field tests are a part of the conducted immunity portion of EMC testing.
What is a Magnetic Field Generator?
A magnetic field generator is a transient generator designed to simulate power frequency EMF for magnetic field immunity testing.
An inductive coil produces the magnetic field for either vertical or horizontal testing. A magnetic field requires a specific current through the coil to produce the frequency. A conducted immunity test system or generator is then needed to produce the high or low-frequency AC magnetic field. The magnetic field generator receives a current or voltage, which is adjusted or amplified and transmitted to the antenna.
Choosing The Right Magnetic Field Generator
ATEC carries a wide variety of magnetic field generators and similar transient immunity test systems designed to fulfill IEC 61000 test standards and equipped with advanced features to streamline EMC pre-compliance and compliance testing. We offer multifunctional test generators that meet multiple test standards, from IEC to MIL-STDs and ISO standards, as well as magnetic immunity test systems designed specifically to meet the IEC’s immunity test requirements.
ATEC offers affordable magnetic field generator rental rates and can equip customers with a comprehensive conducted immunity test solution that includes a transient generator, magnetic immunity test system, magnetic field coil, line frequency magnetic field, and more.
Magnetic Field Test Standards
IEC/EN 61000-4-8 | Power Frequency Magnetic Field Immunity
The IEC/EN 61000-4-8 test standard determines the performance of electrical equipment when exposed to power frequency magnetic fields. A magnetic field generator must produce a magnetic disturbance with power frequencies at 50 Hz and 60 Hz. The power frequency from the generator should mimic the common magnetic field produced in various locations such as residential living spaces, high voltage substations, and power plants.
The IEC/EN 61000-4-9 test standard analyzes immunity to powerful magnetic fields produced by lightning strikes to buildings and other metal frameworks. Testing for pulse magnetic field immunity is largely used for products placed in electrical power plants and substations. This equipment may be subject to initial transient faults in low, medium, and high voltage systems.
IEC/EN 61000-4-10 | Damped Oscillatory Magnetic Field Immunity
The IEC/EN 61000-4-10 test standard regulates establishes the immunity of electrical equipment in medium and high-voltage substations to a damped oscillatory magnetic field. The magnetic field generator must create the damped oscillatory magnetic field or sinusoid waves which can occur during the switching of high voltage bus-bars by isolators.