Document: NRC Regulatory Guide
Document ID: 82021804-a487-471b-a76c-095315525b53
Document Type: regulatory_guide
Title: Guidelines for Evaluating Electromagnetic and Radio-Frequency Interference in Safety-Related Instrumentation and Control Systems (Rev. 2)
Source: NRC Regulatory Guide Division 1
Source URL: https://www.nrc.gov/docs/ML1628/ML16281A531.pdf
Revision Date: 2023-06
Chapter: 
Section ID: RG-1.180
CFR Part: 
CFR Title: 

Content:
omitted. DG-1333, Page 12 3.1 CE101—Conducted Emissions, Low Frequency The CE101 test measures the low-frequency conducted emissions on power leads of equipment and subsystems in the frequency 30 Hz to 10 kHz. This test may be omitted for equipment that meets the following two conditions. 1. The power quality requirements2 of the equipment are consistent with the existing power supply and design changes include power quality controls. 2. The equipment will not impose additional harmonic distortion on the existing power distribution system that exceed 5% total harmonic distortion (THD) or other power quality criteria established with a valid technical basis. When the CE101 test is to be performed, it is applicable to ac and dc power leads, including grounds and neutrals that obtain power from other sources not part of the equipment under test. Conducted emissions on power leads should not exceed the applicable root mean square (rms) values shown in Figure 3.1, “Low-Frequency Emissions Envelopes.” Figure 3.1 Low-Frequency Emissions Envelopes 3.2 CE102—Conducted Emissions, High Frequency The CE102 test measures the high-frequency conducted emissions on power leads of equipment and subsystems in the frequency range 10 kHz to 2 MHz. The test is applicable to ac and dc power leads, including grounds and neutrals that obtain power from other sources that are not part of the equipment under test. Conducted emissions on power leads should not exceed the applicable rms values shown in Figure 3.2. The values are specified according to the voltage of the power source feeding the equipment under test. Conduct of the CE102 test in the frequency range 10 kHz to 450 kHz may be omitted if the nuclear power plant has power quality controls in place (see the conditions for omission of the CE101 test above). Otherwise, the CE102 test should be performed over the full frequency range 10 kHz to 2 MHz. 2 The term “requirements” in this context does not refer to legal