GB/T 17799.5-2012
Electromagnetic compatibility(MEC).Generic standards.HEMP immunity for indoor equipment (English Version)

Standard No.

GB/T 17799.5-2012

Language

Chinese, Available in English version

Release Date

2012

Published By

General Administration of Quality Supervision, Inspection and Quarantine of the People‘s Republic of China

Latest

GB/T 17799.5-2012

Scope

This part specifies the high-altitude electromagnetic pulse (HEMP) immunity requirements for electrical and electronic equipment used indoors. Indoor high-altitude electromagnetic pulse (HEMP) environments depend on the quality of the facility's shielding and protection against conducted environments. This section applies to all equipment types, including residential, commercial, light industrial, hospital, heavy industrial, power station, and power generation equipment. This section applies to indoor equipment connected to the nuclear low-voltage (below 1KV) power supply network, communication network and/or external antenna. Immunity test levels are based on the 90% severity level of the IEC 61000-4-25 standard. Assume that all communication lines have gas discharge tubes at the entrance into the building, and assume that the insulation flashover voltage on low voltage lines is 3 times the lightning strike voltage. For signal ports connected to internal cables, the severe test rating is based on a total cable length of 10m, and longer cables are specified by the regulations. This section covers large and small indoor equipment. The definition of small equipment is given in IEC61000-4-25: the three-dimensional size of an object is less than 1m×1m×1m. Examples of small equipment include cabinet-mounted equipment and desktop personal computers. Large-scale equipment includes equipment with a three-dimensional size greater than or equal to 1m×1m×1m. There is currently no product or product standard in IEC publications addressing the immunity of indoor equipment to high-altitude electromagnetic pulse (HEMP). When relevant product or product family standards appear, the product or product family standards shall be adopted first. It should be noted that the high-altitude electromagnetic pulse (HEMP) environment has a very low probability of occurrence, so this general standard does not make mandatory recommendations unless agreed by the facility owner and equipment manufacturer. This standard does not specify safety requirements for equipment such as click protection, insulation coordination and related dielectric strength tests. However, the immunity tests described in this standard involve hazardous voltages, so high voltage precautions are necessary to protect the health and safety of testers.

GB/T 17799.5-2012 Referenced Document

• GB/T 17626.11 Electromagnetic Compatibility Testing and Measurement Techniques Part 11: Voltage Dips, Short Interruptions and Voltage Variation Immunity Tests for Equipment with Input Current Less than or Equal to 16 A per Phase*， 2023-05-23 Update
• GB/T 17626.13 Electromagnetic compatibility Testing and measurement techniques Harmonics and interharmonics including mains signalling at a.c. power port, low frequency immunity test
• GB/T 17626.2 Electromagnetic compatibility.Testing and measurement techniques.Electrostatic discharge immunity test*， 2018-06-07 Update
• GB/T 17626.4 Electromagnetic compatibility－Testing and measurement techniques－Electrical fast transient/burst immunity test*， 2018-06-07 Update
• GB/T 17626.5 Electromagnetic compatibility—Testing and measurement techniques－Surge immunity test*， 2019-06-04 Update
• GB/T 17799.2 General Standard for Electromagnetic Compatibility Part 2: Immunity Standards in Industrial Environments*， 2023-05-23 Update
• GB/T 4365 Electrotechnical terminology Electromagnetic compatibility

GB/T 17799.5-2012 history

• 2012 GB/T 17799.5-2012 Electromagnetic compatibility(MEC).Generic standards.HEMP immunity for indoor equipment

GB/T 17799.5-2012 -All Parts