1 Scope
This Part specifies classification, general requirements, requirements and testing method, inspection rules and marking of leakage current detectors for electric fire prevention.
2 Normative References
The following documents contain provisions which, through reference in this text, constitute provisions of this Part. For the dated references, the subsequent amendments to (excluding amending error in the text), or revisions of, any of these publications do not apply. However, all parties coming to an agreement according to this Part are encouraged to study whether the latest edition of these documents is applicable. For the undated references, the latest edition of the normative document is applicable to this Part.
GB 9969.1 General principles for preparation of instructions for use of industrial products
GB 12978 Rules for test of fire electronic products
GB 16838 Environmental test methods and severities for fire electronic products
3 Classification
By operation mode, products are classified as:
a) Independent type detector (with monitoring and alarm function);
b) Non-independent type detector.
4 General
4.1 General Provisions
The leakage current detectors for electric fire prevention (hereinafter referred to as detector) meets the requirements of this Standard upon satisfying this Chapter first, being applied with test according to Chapter 5, and meeting the testing requirements.
4.2 Alarm Performance
4.2.1 Where the residual current of the protected circuit reaches the alarm set value, the detector shall send out the alarm signal within 60s.
4.2.2 The alarm value of the detector shall not be less than 20 mA and not larger than 1000 mA, and the detector alarm value shall between 80%~ 100% of the alarm set value.
4.3 Monitoring and Alarm Function (only applicable to independent type detector)
4.3.1 The detector shall have working status indicator light and self-check function.
4.3.2 The detector, while alarming, shall send out acoustic and light alarm signal, and keep it till manual reset.
4.3.3 Under the alarm condition, the sound pressure level (A-weighted) 1m away at front of its acoustic device shall be larger than 70 dB and less than 115 dB; the light signal 3m away at front shall be clearly discernible in the ambient condition where the illumination is not higher than 500 1x.
4.3.4 The detector that have function of communication with other detector or alarm and control unit shall also satisfy the corresponding requirement of the manufacturer.
4.4 Operating Instructions
The detector shall have corresponding instructions in Chinese. The instructions shall satisfy the requirements of GB 9969.1.
