GB 14287.7-2025 Electrical fire monitoring system—Part 7: Current limiting protector for electric fire prevention English, Anglais, Englisch, Inglés, えいご
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ICS 55.200
CCS H 57
National Standard of the People's Republic of China
GB 14287.7-2025
Electrical fire monitoring system - Part 7: Current limiting protector for electric fire prevention
电气火灾监控系统 第7部分：电气防火限流式保护器
Issue date: 2025-10-31 Implementation date: 2026-11-01
Issued by the General Administration of Quality Supervision, Inspection and Quarantine of the People's Republic of China
the Standardization Administration of the People's Republic of China
Contents
Foreword
Introduction
1 Scope
2 Normative References
3 Terms and Definitions
4 Requirements
4.1 General Requirements
4.2 Packaging and Appearance
4.3 Basic Functions
4.4 Alarm Performance
4.5 Non - Action Performance
4.6 Repeatability
4.7 Voltage Fluctuation
4.8 Climate Environmental Tolerance
5 Test Methods
5.1 General Requirements
5.2 Basic Function Inspection
5.3 Alarm Performance Test
5.4 Non - Action Performance Test
5.5 Repeatability Test
5.6 Voltage Fluctuation Test
5.7 Low - Temperature (Operation) Test
5.8 Constant Humidity and Heat (Operation) Test
5.9 Impact (Operation) Test
5.10 Collision (Operation) Test
6 Inspection Rules
6.1 Factory Inspection
6.2 Type Inspection
7 Marking
7.1 Product Marking
7.2 Quality Inspection Marking
Appendix A (Normative) Combustion Performance of Enclosure
1 Scope
This document defines the terms for current - limiting protectors for electric fire prevention, specifies the requirements, inspection rules, and markings, and describes the corresponding test methods.
This document applies to current - limiting protectors for electric fire prevention in electrical fire monitoring systems (hereinafter referred to as "protectors") for the design, manufacture, and inspection of such products.
2 Normative References
The contents of the following documents are incorporated into this document by reference. Where a date is specified, only the version corresponding to that date applies to this document. Where no date is specified, the latest version (including all amendments) applies to this document.
GB/T 9969 General Rules for Industrial Product Instruction Manuals
GB 12978 Inspection Rules for Fire Protection Electronic Products
GB/T 16838 Environmental Test Methods and Severity Levels for Fire Protection Electronic Products
GB/T 17626.2 Electromagnetic Compatibility — Tests and Measurement Techniques — Electrostatic Discharge Immunity Test
GB/T 17626.3 Electromagnetic Compatibility — Tests and Measurement Techniques — Part 3: Radiated RF Field Immunity Test
GB/T 17626.4 Electromagnetic Compatibility — Tests and Measurement Techniques — Electrical Fast Transient/Burst Immunity Test
GB/T 17626.5 Electromagnetic Compatibility — Tests and Measurement Techniques — Surge (Impulse) Immunity Test
GB/T 17626.6 Electromagnetic Compatibility — Tests and Measurement Techniques — Conducted RF Immunity Test
3 Terms and Definitions
The following terms and definitions apply to this document.
3.1
Current - Limiting Protector for Electric Fire Prevention
A protective device that limits current in the protected circuit when a short circuit or overload occurs.
3.2
Rated Current
The maximum current value that the protector can continuously pass through safely under normal operating conditions.
3.3
Short - Circuit Protection Current
The minimum current that triggers the protector's short - circuit protection.
3.4
Overload Protection Current
The minimum current that triggers the protector's overload protection.
3.5
Short - Circuit Protection Time
The time from when a short circuit occurs in the protected circuit to when the protector completes current limiting protection.
3.6
Current - Limiting Time
The time from when the protector starts current limiting to when it completes current limiting protection.
3.7
Overload Protection Time
The time from when the current value of the protected circuit reaches the overload protection current setting value to when current limiting protection is completed.
4 Requirements
4.1 General Requirements
Protectors shall meet the requirements of this chapter and be tested in accordance with Chapter 5 to confirm compliance with these requirements.
4.2 Packaging and Appearance
4.2.1 Protectors shall have complete packaging at the time of factory release. The protector surface shall have product markings, and the packaging shall include quality inspection pass markings and instruction manuals.
4.2.2 The surface of the protector shall show no signs of corrosion, peeling of coatings, or bubbling, and no obvious scratches, cracks, burrs, or other mechanical damage. Tightened parts shall not be loose.
4.3 Basic Functions
4.3.1 Indicator Lights
Protectors shall have independent indicator lights for their working status, separately indicating normal monitoring status and alarm status. The normal monitoring status indicator shall be green, and the alarm status indicator shall be red. The indicator lights shall have Chinese functional annotations. In the 3 m range directly in front of the indicator lights and in an environment with illuminance not exceeding 500 lx, the indicator lights shall be clearly visible.
Note: The normal monitoring status refers to the state where the protector is powered on and working normally, has not triggered current limiting protection, and has not issued an alarm signal.
4.3.2 Audible Devices
In alarm conditions, the sound pressure level (A - weighted) of the protector's audible device in the 1 m range directly in front of it shall be greater than 70 dB and less than 115 dB.
4.3.3 Protective Alarm Function
Producers shall specify the rated current, short - circuit protection current, and overload protection current of the protector. When the protected circuit experiences an overload or short circuit, the protector shall trigger current limiting protection, issue audible and visual alarm signals within 3 seconds, and maintain the alarm until the protector is reset.
4.3.4 Reset Function
Protectors shall have a reset button, which shall have measures to prevent accidental operation. After the overload or short circuit of the protected circuit is eliminated, the protector shall be able to return to the normal monitoring status by operating the reset button.
4.3.5 Self - Inspection Function
Protectors shall be able to manually check their audible devices and all indicator lights on the panel. During self - inspection, the protector shall not trigger current limiting protection.
4.3.6 Communication Function
Protectors shall have at least one communication interface. Protectors shall be able to transmit their working status to the connected display device through the communication interface.
4.3.7 Factory Settings
