GB14287.9-2026
Electrical fire monitoring system—Part 9: Insulation monitoring device of electrical fire
电气火灾监控系统 第9部分：探测绝缘性能式电气火灾监控探测器
GB 14287.9-2026 is an upcoming mandatory Chinese national standard for Electrical fire monitoring system—Part 9: Insulation monitoring device of electrical fire. It appears in the Electronics compliance cluster with a product safety focus and has an implementation date of Feb 1, 2027.
Applicability depends on product scope, certification route, competent authority notices and transition rules. Requst for the translation or verify source before using this record in a compliance decision.
Compliance overview
Scope and applicability
This standard applies to the design, manufacturing, and inspection of insulation monitoring devices of electrical fire used within electrical fire monitoring systems. It specifically targets products operating in IT systems (ungrounded or high-impedance grounded AC and DC distribution systems). Manufacturers of electrical fire monitoring detectors must comply with these requirements to ensure market access in China.
Technical requirements
The standard mandates strict general requirements for detector appearance, component performance, and basic operational functions. It specifies that devices must actively inject a measurement signal—with a peak voltage not exceeding 50V—to monitor insulation resistance. Detectors must accurately trigger monitoring alarms within 30 seconds when insulation degrades to preset levels, even under specified system leakage capacitance conditions. The standard also defines requirements for fault alarm functions and communication interfaces with monitoring equipment. Furthermore, the standard sets critical safety thresholds for electrical insulation resistance, leakage current, and dielectric strength to ensure operational safety. It outlines comprehensive electromagnetic compatibility (EMC) criteria, requiring detectors to withstand various radiated and conducted disturbances, electrostatic discharges, and voltage fluctuations without triggering false alarms. The document also specifies mechanical and climatic environmental tolerances, ensuring device reliability under vibration, collision, low temperature, and constant damp heat conditions. Non-metallic enclosures must comply with specific flame retardancy requirements as detailed in the normative annexes. Additionally, product marking, instruction manuals, and model designations must adhere to the prescribed formats.
Testing methods
The standard outlines a comprehensive suite of evaluations including basic function tests (alarm triggering and insulation measurement accuracy), fault alarm tests, and communication capability tests. It mandates rigorous electrical safety tests for insulation resistance, leakage current, and electrical strength. Furthermore, devices undergo extensive EMC testing (referencing GB/T 17626 series) and environmental endurance tests for vibration, collision, low temperature, and humidity, alongside a specific enclosure burning performance test.
FAQs
What products are regulated under GB 14287.9-2026?
This standard specifically regulates insulation monitoring devices used in IT grounding systems (ungrounded or high-impedance grounded AC and DC distribution systems). It applies to devices that actively inject a measurement signal to detect insulation degradation, distinguishing them from residual current or temperature-based detectors.
Are there any updates from the previous version of GB 14287.9?
As a newly released part of the GB 14287 series, it introduces specific technical frameworks for insulation performance detection, which were not covered in previous parts. It mandates strict performance criteria under defined system leakage capacitance conditions and includes updated electromagnetic compatibility and environmental tolerance requirements.
How does GB 14287.9-2026 differ from international ISO or IEC standards?
While it aligns conceptually with international electrical safety practices, it is a mandatory Chinese national standard tailored specifically for the Chinese electrical fire monitoring system framework. It references Chinese GB/T standards for testing methods and includes specific local compliance requirements for product marking and manual localization.
The summary above provides a high-level overview of GB 14287.9-2026. To ensure complete compliance for your products entering the Chinese market, a precise and professional translation of the full technical specifications is essential. Purchase our high-quality English translation of GB 14287.9-2026 today to access all detailed parameters, tables, and testing procedures.
Applicability hints
- Type
- Product
- CCS
- C81
- ICS
- 13.220.20
- Competent department
- National Fire and Rescue Administration
- Technical committee
- National Technical Committee on Fire Protection of Standardization Administration of China