Standard No.:	NB/T 42150-2018
English Name:	Specific protective devices for low-voltage surge protective devices
Chinese Name:	低压电涌保护器专用保护设备
Professional Classification:	NB    Professional Standard - Energy
Issued by:	NEA
Issued on:	2018-04-03
Implemented on:	2018-7-1
Status:	superseded
Superseded by:	NB/T 42150-2021 Specific protective devices for low-voltage surge protective devices
Superseded on:	2021-7-26
Language:	English
File Format:	PDF
Word Count:	8500 words
Price(USD):	555.0
Delivery:	via email in 1 business day

NB/T 42150-2018 Specific protective devices for low-voltage surge protective devices English Specific protective devices for low-voltage surge protective devices 1 Scope This standard specifies the service conditions, preferred values, classification, markings and other product information, technical requirements and test methods for specific protective devices for low-voltage surge protective devices. This standard applies to specific protective devices for low-voltage surge protective devices in systems with AC frequency of 50Hz or 60Hz, and rated voltage not exceeding 440V (phase to phase), hereinafter referred to as the “specific protective device” or “SSD”. Note: This standard may apply to specific protective devices for the surge protective devices (SPDs) intended for AC rated voltage not exceeding 1000V (rms) or DC voltage not exceeding 1500V. For the purposes of this standard, the specific protective devices are mainly based on circuit breaker technology and are suitable for overcurrent protection of voltage-limiting SPDs. The specific protective devices covered by this standard are suitable for isolation. 2 Normative references The following referenced documents are indispensable for the application of this document. For dated references, only the edition cited applies. For undated references, the latest edition (including any amendments) applies. GB/T 4208-2017 Degrees of protection provided by enclosure (IP code) GB/T 5023 (all parts) Polyvinyl chloride insulated cables of rated voltages up to and including 450/750V GB/T 5169.10-2017 Fire hazard testing for electric and electronic products—Part 10: Glowing/hot-wire based test methods—Glow-wire apparatus and common test procedure GB/T 5169.11-2017 Fire hazard testing for electric and electronic products—Part 11: Glowing/hot-wire based test methods—Glow-wire flammability test method for end-products (GWEPT) GB/T 10963.1-2005 Electrical accessories—Circuit-breakers for over-current protection for household and similar installation—Part 1: Circuit-breakers for a.c. operation GB/T 16927.1 High-voltage test techniques—Part 1: General definitions and test requirements GB/T 18802.1-2011 Low-voltage surge protective devices—Part 1: Surge protective devices connected to low-voltage power distribution systems—Requirements and tests 3 Terms and definitions For the purposes of this standard, the following terms and definitions and those given in GB/T 18802.1-2011 and GB/T 10963.1-2005 apply. 3.1 specific protective devices for low-voltage surge protective devices (SSD) external detachment device intended for surge protective devices (SPDs) in low-voltage power supply systems, which can withstand the expected surge current at the place where the protected SPD is installed, and can cut off the over-current at power frequency caused by SPD failure and is characterized by actuation with small current at power frequency 3.2 rated operational voltage Ue AC voltage rms specified by the manufacturer that can be continuously applied to the specific protective device

Foreword i 1 Scope 2 Normative references 3 Terms and definitions 4 Service conditions 5 Preferred values 6 Classification 7 Marking and other product data 8 Technical requirements 9 Type test Annex A (Normative) Test procedures of conformity verification and number of specimens submitted Annex B (Normative) Routine tests Annex C (Normative) Limiting voltage of series circuit between specific protective device and SPD Bibliography