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FINAL CERTIFIED VERSION — IEC 61000-3-2 vs GB 17625.1
EXECUTIVE SUMMARY
Scope: harmonic current emission limits for electrical/electronic equipment with input current ≤16 A per phase, split by equipment Class A/B/C/D. GB 17625.1-2022 is the Chinese national adoption of IEC 61000-3-2; both are TIER 1 limit standards, so comparison is tier-consistent. Key procurement implication: GB 17625.1 is a mandatory GB (强制性) — CCC/EMC compliance in China requires testing to GB 17625.1, not IEC directly; confirm the adopted IEC edition before accepting an overseas test report.
APPLICABLE CHINESE STANDARDS
| Standard No. | Title (Chinese) | Scope | Mandatory/Recommended | Status |
|---|---|---|---|---|
| GB 17625.1-2022 | 电磁兼容 限值 第1部分：谐波电流发射限值（设备每相输入电流≤16A）(EMC — Limits — Part 1: Harmonic current emission limits, equipment input current ≤16 A per phase) | Harmonic current limits, ≤16 A/phase | Mandatory (GB) | Current |
| GB/T 17626.7 | 电磁兼容 试验和测量技术 供电系统及所连设备谐波、间谐波的测量和测量仪器导则 (EMC — Measurement of harmonics/interharmonics) | Test method (instrumentation) | Recommended | Current |
| GB 17625.2 | 电磁兼容 限值 对每相额定电流≤16A且无条件接入的设备在公用低压供电系统中产生的电压变化、电压波动和闪烁的限制 (Voltage changes, fluctuations and flicker) | Flicker limits (related, separate) | Mandatory (GB) | Current |
STANDARD TIER CLASSIFICATION
| Standard | Tier | Description |
|---|---|---|
| IEC 61000-3-2 | TIER 1 — Limit standard | Sets harmonic current emission limits |
| GB 17625.1-2022 | TIER 1 — Limit standard | Chinese adoption; same function |
| EN/BS EN 61000-3-2 | TIER 1 — Limit standard | EU/UK adoption |
| IEC 61000-4-7 / GB/T 17626.7 | TIER 2 — Test method | Defines harmonic measurement |
| IEC 61000-3-12 | TIER 1 — Limit standard (separate) | Limits for >16 A and ≤75 A/phase |
FLAG: IEC 61000-3-12 is a separate standard — do NOT apply 61000-3-2 limits to equipment >16 A.
SCOPE BREAKDOWN (by equipment class defined inside the standard)
Class A — Balanced three-phase / other equipment
Chinese standard: GB 17625.1-2022 (电磁兼容 限值 第1部分)
International equivalent: IEC 61000-3-2:2018+AMD1:2020 (Ed 5.1) — ⚠️ verify latest edition
Equivalence: IDT (adoption)
Standard tier match: Both TIER 1 — valid comparison
| Parameter | Chinese Value (Clause) | International Value (Clause) | Deviation | Mutual Recognition | Procurement Impact |
|---|---|---|---|---|---|
| Odd harmonics 3–9 limits | Per GB 17625.1-2022 Table 1 [Verify: GB 17625.1-2022 §7/Table 1] | Per IEC 61000-3-2 Table 1 [Verify: IEC 61000-3-2 §7/Table 1] | Identical (IDT) | 直接互认 (Direct mutual recognition) | LOW |
| Even harmonics 2–10 | Per Table 1 [Verify: §7] | Per Table 1 [Verify: §7] | Identical | 直接互认 (Direct mutual recognition) | LOW |
Class B — Portable tools
Chinese standard: GB 17625.1-2022
International equivalent: IEC 61000-3-2:2018+AMD1:2020 (Ed 5.1)
Equivalence: IDT
Standard tier match: Both TIER 1 — valid comparison
| Parameter | Chinese Value (Clause) | International Value (Clause) | Deviation | Mutual Recognition | Procurement Impact |
|---|---|---|---|---|---|
| Harmonic limits | Class A limits ×1.5 [Verify: GB 17625.1-2022 §7/Table 2] | Class A limits ×1.5 [Verify: IEC 61000-3-2 §7/Table 2] | Identical | 直接互认 (Direct mutual recognition) | LOW |
Class C — Lighting equipment
Chinese standard: GB 17625.1-2022
International equivalent: IEC 61000-3-2:2018+AMD1:2020 (Ed 5.1)
Equivalence: IDT
Standard tier match: Both TIER 1 — valid comparison
| Parameter | Chinese Value (Clause) | International Value (Clause) | Deviation | Mutual Recognition | Procurement Impact |
|---|---|---|---|---|---|
| Harmonic limits (percentage of fundamental) | Per Table 3 [Verify: GB 17625.1-2022 §7/Table 3] | Per Table 3 [Verify: IEC 61000-3-2 §7/Table 3] | Identical | 直接互认 (Direct mutual recognition) | LOW |
Class D — Equipment with special input-current waveshape (PCs, monitors, TV ≤600 W)
Chinese standard: GB 17625.1-2022
International equivalent: IEC 61000-3-2:2018+AMD1:2020 (Ed 5.1)
Equivalence: IDT
Standard tier match: Both TIER 1 — valid comparison
| Parameter | Chinese Value (Clause) | International Value (Clause) | Deviation | Mutual Recognition | Procurement Impact |
|---|---|---|---|---|---|
| Harmonic limits (mA/W) | Per Table 4 [Verify: GB 17625.1-2022 §7/Table 4] | Per Table 4 [Verify: IEC 61000-3-2 §7/Table 4] | Identical | 直接互认 (Direct mutual recognition) | LOW |
KEY DIFFERENCES SUMMARY
- Adopted IEC edition — GB 17625.1-2022 adopts a specific IEC 61000-3-2 edition; if the buyer's IEC report is to a different edition, re-test. Mutual recognition: 附加测试后互认 (Mutual recognition after additional testing). Impact: MEDIUM.
- Mandatory status — GB 17625.1 is mandatory (GB); IEC is voluntary unless invoked by regulation. Impact: HIGH for China market entry.
- Scope boundary 16 A — equipment >16 A falls under IEC 61000-3-12 / GB 17625.1 does not apply. Impact: HIGH if misapplied.
- Test method — IEC 61000-4-7 / GB/T 17626.7 governs measurement; edition alignment affects results. Impact: MEDIUM.
REGULATORY LINKAGE TABLE (法规联动)
| Compliance Scenario | Chinese Regulatory Basis | International Regulatory Basis |
|---|---|---|
| Mandatory product certification | CCC / EMC testing to GB 17625.1 | CE marking (EMC Directive 2014/30/EU), UKCA |
| Engineering acceptance inspection | N/A for product standard comparison | N/A |
| Import/export compliance | CCIB commodity inspection | Destination-country customs / EMC declaration |
| Designer/engineer obligation | N/A for product standard comparison | Local EMC regulation |
AUDIT FLAG RESOLUTION
- ✅ RESOLVED: GB 17625.1-2022 is CURRENT (现行) per std.samr.gov.cn — no supersession note added.
- ✅ FALSE POSITIVE (domain flag): IEC 61000-3-12 cited alongside 61000-3-2 — valid because it covers the >16 A scope boundary, not a misapplication.
- ⚠️ UNRESOLVED: Exact IEC 61000-3-2 edition adopted by GB 17625.1-2022 — verify against GB 17625.1-2022 foreword (前言).
- ⚠️ UNRESOLVED: All Table 1–4 numeric limits — verify against official GB 17625.1-2022 §7 tables.
PROCUREMENT VERDICT
- Confirm equipment input current ≤16 A/phase; if >16 A, switch to IEC 61000-3-12.
- Identify equipment Class (A/B/C/D) — limits differ materially.
- Verify GB 17625.1-2022 adopted IEC edition matches your test report edition.
- For China market: require CCC/EMC test to GB 17625.1-2022.
- For EU/UK: require EN/BS EN 61000-3-2 test.
- Obtain official standard texts before accepting any test report.
REFERENCE DOCUMENT CHECKLIST (配套调阅清单)
- GB 17625.1-2022 §7 / Tables 1–4 — harmonic limit values per class
- GB 17625.1-2022 前言 (Foreword) — adopted IEC edition
- IEC 61000-3-2 §7 / Tables 1–4 — international limit values
- IEC 61000-4-7 / GB/T 17626.7 — measurement method
FIELD INSPECTION CHECKLIST
- Verify rated input current on nameplate (≤16 A/phase).
- Confirm equipment class assignment matches test report.
- Check test report cites correct standard edition.
- Verify test lab accreditation (CNAS / IECEE CB).
- Confirm CCC/EMC certificate validity for China market.
CONFIDENCE RATING
🟡 MEDIUM — core structure and standard identification verified across two sources; all numeric limit values flagged for official text confirmation (Tables 1–4 not reproduced).
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