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
NB/T 42150-2018, NB 42150-2018, NBT 42150-2018, NB/T42150-2018, NB/T 42150, NB/T42150, NB42150-2018, NB 42150, NB42150, NBT42150-2018, NBT 42150, NBT42150
Introduction of NB/T 42150-2018
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
Contents of NB/T 42150-2018
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
