CN Quality Check
Standards Comparison Tool
EXECUTIVE SUMMARY
Scope: GB/T 18387 (电动车辆电磁场发射强度 — EM field emissions from electric vehicles, 9 kHz–30 MHz), plus the mandatory vehicle-EMC parent standard GB 34660. Landscape: GB/T 18387 is a recommended (GB/T) type-test standard with no IDT international counterpart; closest functional equivalents (UN ECE R10, CISPR 12, SAE J551-5) cover different bands/limit structures → 不可互认 (Not mutually recognised) without additional testing. Key implication: buyers must treat GB/T 18387 as a China-specific low-frequency test and separately secure UN ECE R10 type approval; neither substitutes for the other.
APPLICABLE CHINESE STANDARDS
| Standard No. | Title (Chinese) | Scope | Mandatory/Recommended | Status |
|---|---|---|---|---|
| GB/T 18387-2017 | 电动车辆的电磁场发射强度的限值和测量方法 (Limits and test methods of EM field emission intensity for electric vehicles) | Radiated E/H field, 9 kHz–30 MHz, vehicle level | Recommended (GB/T) | Current |
| GB 34660-2017 | 道路车辆 电磁兼容性要求和试验方法 (Road vehicles — EMC requirements and test methods) | Vehicle EMC, mandatory | Mandatory (GB) | Current |
| GB 34660-2026 | 道路车辆 电磁兼容性要求和试验方法 (Road vehicles — EMC requirements and test methods) | Vehicle EMC, mandatory | Mandatory (GB) | Upcoming replacement (effective 2027-07-01) — pending supersession of GB 34660-2017 |
| GB/T 18655 | 车辆、船和内燃机 无线电骚扰特性 (Vehicle radio disturbance characteristics) | Component conducted/radiated emissions (≈CISPR 25) | Recommended | Current |
STANDARD TIER CLASSIFICATION
| Standard | Tier | Description |
|---|---|---|
| GB/T 18387-2017 | TIER 1 — Product/Type-Test | Limits + method for EV low-frequency EM emission |
| GB 34660-2017 | TIER 1 — Product (Mandatory) | Mandatory vehicle EMC requirements |
| UN ECE R10 Rev.6 | TIER 1 — Type-Approval | Vehicle EMC type approval |
| CISPR 12:2007+A1:2009 | TIER 2 — Test Method | Radiated disturbance method, 30–1000 MHz |
| ISO 11451-2:2015 | TIER 2 — Test Method | Vehicle immunity to off-board radiation |
⚠️ Tier note: GB/T 18387 is a recommended standard functioning as de-facto type-test basis — valid extension because GB 34660 (mandatory) references vehicle EMC test practice; GB/T 18387 supplies the low-frequency (9 kHz–30 MHz) detail GB 34660 does not fully cover.
SCOPE BREAKDOWN
EV low-frequency EM field emission (9 kHz–30 MHz)
Chinese standard: GB/T 18387-2017: 电动车辆的电磁场发射强度的限值和测量方法 (Limits and test methods of EM field emission intensity for electric vehicles)
International equivalent: SAE J551-5 (functional origin); UN ECE R10 Rev.6 (2019) Annex 4/5 — ⚠️ different band/limit structure; CISPR 12:2007+A1:2009 (30–1000 MHz only)
Equivalence: NEQ (no IDT counterpart)
Standard tier match: Both TIER 1 — valid comparison (but different frequency bands)
Parameter comparison table:
| Parameter | Chinese Standard Value (Clause) | International Value (Clause) | Deviation | Mutual Recognition | Procurement Impact |
|---|---|---|---|---|---|
| Frequency range | 9 kHz–30 MHz (GB/T 18387-2017 §1) | 30–1000 MHz (CISPR 12:2007 §1); R10 broadband/narrowband (R10 Annex 4/5) | Different band (no direct comparison) | 不可互认 (Not mutually recognised) | HIGH |
| Magnetic field limit (H) | dBµA/m vs frequency, 3 m [Verify: GB/T 18387-2017 §4 limit table] | R10 Annex 4/5 limits [Verify: R10 Rev.6 Annex 4] | Different limit structure | 不可互认 (Not mutually recognised) | HIGH |
| Electric field limit (E) | dBµV/m vs frequency, 3 m [Verify: GB/T 18387-2017 §4] | CISPR 12 §4 limits (30–1000 MHz) | Different band | 不可互认 (Not mutually recognised) | HIGH |
| Test distance | 3 m [Verify: GB/T 18387-2017 §5] | 3 m or 10 m (CISPR 12 §5) | Method difference | 附加测试后互认 (Mutual recognition after additional testing) | MEDIUM |
| Test condition | Chassis dynamometer [Verify: GB/T 18387-2017 §5] | R10 dynamometer/road [Verify: R10 Annex 4] | Comparable | 附加测试后互认 (Mutual recognition after additional testing) | LOW |
KEY DIFFERENCES SUMMARY
- Frequency band — CN 9 kHz–30 MHz vs CISPR 12 30–1000 MHz: no overlap → 不可互认 (Not mutually recognised); HIGH.
- Limit structure — CN H-field (dBµA/m) + E-field (dBµV/m) vs R10 broadband/narrowband: different → 不可互认 (Not mutually recognised); HIGH.
- Mandatory vs recommended — GB 34660 (GB, mandatory) is the legal gate; GB/T 18387 is recommended → 附加测试后互认 (Mutual recognition after additional testing) only via GB 34660 route; HIGH.
- Test distance/method — 3 m vs 3/10 m: 附加测试后互认 (Mutual recognition after additional testing); MEDIUM.
REGULATORY LINKAGE TABLE (法规联动)
| Compliance Scenario | Chinese Regulatory Basis | International Regulatory Basis |
|---|---|---|
| Mandatory product certification | GB 34660-2017 (mandatory); CCC where applicable | UN ECE R10 type approval; CE/UKCA |
| Engineering acceptance inspection | N/A for product standard comparison | N/A |
| Import/export compliance | CCIB commodity inspection | Destination customs / R10 approval |
| Designer/engineer obligation | N/A for product standard comparison | Local vehicle type-approval regulation |
AUDIT FLAG RESOLUTION
- 🔴 CRITICAL CORRECTION: Answer A cited GB/T 18387-2008 — superseded. Correct current edition is GB/T 18387-2017 (现行, Current). Use 2017 throughout.
- ✅ RESOLVED: Answer B's suspicion of a 2017 revision is confirmed — GB/T 18387-2017 is Current.
- ✅ RESOLVED: GB 34660-2017 is Current; GB 34660-2026 is upcoming replacement (effective 2027-07-01) — flagged as pending supersession.
- ✅ FALSE POSITIVE (domain flag): GB/T 18387 used as type-test basis — valid because it supplies low-frequency detail complementing mandatory GB 34660.
- ⚠️ UNRESOLVED: Exact H/E limit values and test-distance clauses — verify against GB/T 18387-2017 §4–§5.
PROCUREMENT VERDICT
- Confirm supplier holds GB 34660-2017 compliance (mandatory legal gate).
- Require GB/T 18387-2017 test report (not 2008) for 9 kHz–30 MHz.
- Obtain separate UN ECE R10 approval for export markets — not substitutable.
- Monitor GB 34660-2026 transition (effective 2027-07-01).
- Verify test lab accreditation and dynamometer method.
- Do not accept CISPR 12 report as evidence of GB/T 18387 compliance.
REFERENCE DOCUMENT CHECKLIST (配套调阅清单)
- GB/T 18387-2017 §4 — H/E field limit values
- GB/T 18387-2017 §5 — test distance and dynamometer method
- GB 34660-2017 — mandatory EMC requirements
- GB 34660-2026 — transition requirements
- UN ECE R10 Rev.6 Annex 4/5 — international limits
FIELD INSPECTION CHECKLIST
- Verify test report edition = 2017, not 2008.
- Confirm frequency range 9 kHz–30 MHz covered.
- Confirm 3 m test distance and dynamometer condition.
- Check lab accreditation (CNAS/CMA).
- Cross-check GB 34660-2017 certificate validity.
CONFIDENCE RATING
🟡 MEDIUM — edition/status verified against official authority; ≤3 limit-value parameters flagged for official text confirmation.
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