GB/T 17625.8-2025 Electromagnetic compatibility—Limits—Part 8:Limits for harmonic currents produced by equipment connected to public low-voltage systems with input current >16 A and ≤75 A per phase
GB/T 17625.8-2025 Electromagnetic compatibility—Limits—Part 8:Limits for harmonic currents produced by equipment connected to public low-voltage systems with input current >16 A and ≤75 A per phase
Basic Information
Scope
This document concerns the harmonic current limits for equipment connected to public power supply systems. The limits given in this document apply to electrical and electronic equipment with a rated input current of more than 16 A and less than or equal to 75 A per phase, which are intended to be connected to the following types of public low-voltage AC distribution systems:
a) Nominal voltage 220 V and below, single-phase, two-wire or three-wire system;
b) Nominal voltage 380 V and below, three-phase, three-wire or four-wire system;
c) Nominal frequency 50 Hz.
The limits given in this document (see Chapter 5) apply to equipment connected to 220 V/380 V, 50 Hz systems. Equipment connected to other distribution systems is not included in this scope.
Note 1: Limits applicable to other systems will be added in future versions of this document.
Note 2: In the harmonic current requirements of facilities, equipment with a rated input current exceeding 75 A per phase is considered. See IEC TR 61000-3-6 and IEC TR 61000-3-14.
This document applies to equipment intended to be connected to low-voltage public systems, not to equipment intended to be connected to private low-voltage systems only connected to medium- or high-voltage public power supply systems.
Note 3: The scope of this document is limited to equipment connected to public low-voltage systems, because emissions from equipment installed in private low-voltage systems will be subject to the procedures specified in IEC TR 61000-3-6 at medium-voltage public connection points, and/or to overall control through agreements between the power supply department and users. It is expected that operators of private systems will manage the electromagnetic compatibility environment in a manner that ensures compliance with the provisions of IEC TR 61000-3-6 and/or contractual agreements.
Note 4: If the equipment is only connected to private systems, the manufacturer shall in