GB/T 18387-2017 Magnetic Field Limits

Radiated Emission (RE-H) – Magnetic Field Strength Limits (0.15 MHz to 30 MHz)

Magnetic field radiated emission limits for electric and hybrid vehicles per Chinese national standard GB/T 18387-2017, covering frequency range 0.15 MHz to 30 MHz. This standard applies to the measurement of electromagnetic radiated emission from electric and hybrid vehicles.

Limit Visualization Curve

Envelope

Levels in dB(µA/m). Formula: f is frequency in MHz.

Frequency Range MHz	Peak Limit [dB(µA/m)]
0.15 to 4.77	37.36-20 lg(f)
4.77 to 15.92	64.52-60 lg(f)
15.92 to 20	16.45-20 lg(f)
20 to 30	-9.57

About GB/T 18387-2017

GB/T 18387-2017 specifies the limits and measurement methods of electromagnetic radiated emissions (both electric and magnetic field) from electric vehicles and hybrid electric vehicles in the frequency range of 0.15 MHz to 30 MHz.

It is equivalent to standard SAE J551-5. It is designed to protect off-vehicle receivers from electromagnetic disturbances produced by electric powertrains, traction batteries, and other high-voltage vehicle systems.

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