GB/T 14048.22-2022Low-voltage switchgear and controlgear - Part 7-4: Ancillary equipment - PCB terminal blocks for copper conductors (English PDF)

foreword

This document is in accordance with the provisions of GB/T 1.1-2020 "Guidelines for Standardization Work Part 1.Structure and Drafting Rules of Standardization Documents"

drafted.

This document is part 7-4 of GB/T 14048.GB/T 14048 "Low-voltage switchgear and control equipment" has released the following

part.

--- Part 1.General;

--- Part 2.Circuit breakers;

--- Part 3.Switches, isolators, isolating switches and fuse combinations;

--- Part 4-1.Contactors and motor starters Electromechanical contactors and motor starters (including motor protectors);

--- Part 4-2.Contactors and motor starters Semiconductor controllers and starters for AC motors (including soft starters);

--- Part 4-3.AC semiconductor controllers and contactors for contactors and motor starters for non-motor loads;

--- Part 5-1.Control circuit appliances and switching elements electromechanical control circuit appliances;

--- Part 5-2.Control circuit electrical appliances and switching elements proximity switches;

--- Part 5-3.Proximity switches (PDDB) with deterministic functions under fault conditions for control circuit appliances and switching elements

Require;

--- Part 5-4.Special test for performance evaluation methods of small-capacity contacts of control circuit appliances and switching elements;

--- Part 5-5.Electrical emergency braking devices with mechanical latch function for control circuit appliances and switching elements;

--- Part 5-6.Control circuit electrical appliances and switching elements DC interface for proximity sensors and switching amplifiers (NAMUR);

--- Part 5-7.Requirements for control circuit appliances and switching elements for proximity devices with analog outputs;

--- Part 5-8.Three-position enabling switches for control circuit electrical appliances and switching elements;

--- Part 5-9.Control circuit electrical appliances and switching elements flow switches;

--- Part 6-1.Multifunctional electrical transfer switch electrical appliances;

--- Part 6-2.Multifunctional electrical appliances (equipment) control and protection switch electrical appliances (equipment) (CPS);

--- Part 7-1.Terminal blocks for copper conductors of auxiliary devices;

--- Part 7-2.Protective conductor terminal block for copper conductors of auxiliary devices;

--- Part 7-3.Safety requirements for auxiliary device fuse terminal blocks;

--- Part 7-4.PCB terminal block for copper conductors of auxiliary devices;

--- Part 8.Built-in thermal protection (PTC) control unit for rotating electrical machines;

--- Part 9-1.Arc-fault active suppression system arc extinguishing appliances.

This document replaces GB/T 14048.22-2017 "Low-voltage switchgear and control equipment - Part 7-4.Auxiliary device copper conductors

Compared with GB/T 14048.22-2017, in addition to structural adjustment and editorial changes, the main technical changes are as follows.

--- Changed the minimum cross-sectional area of copper conductors applicable to this document from 0.05mm2 to 0.08mm2 (see Chapter 1, 5.3.5, Table 1 and

Table 2, Chapter 1, 4.3.5, Table 1 and Table 2 of the.2017 edition);

--- Changed the definition of the upper temperature limit (ULT) to clarify that the maximum temperature of the PCB terminal block is specified by the manufacturer (see 3.5,

2010 and IEC 60947-1.2007/AMD2.2014 (see Chapter 1, Chapter 2, Chapter 4, 5.3.1, Chapter 7~9

Chapter), the reason is to be consistent with the latest edition of IEC 60947-1, and thus refer to the relevant IEC 60947-1.2020

The following technical differences arise in the terms.

* Changed the general requirements for dielectric properties (see 8.2.2);

* Changed the requirements for the launch test (see 8.3);

* Changed the verification requirements for the impulse withstand voltage of dielectric properties (see 9.4.2.2);

* Changed the general requirements for EMC testing (see 9.6.1).

--- Replace ISO 6988 with the normative reference GB/T 9789-2008 (see 9.4.7.1).

Please note that some content of this document may be patented. The issuing agency of this document assumes no responsibility for identifying patents.

Introduction

Low-voltage switchgear and control equipment is a large-scale and wide-ranging industry, with products such as circuit breakers, isolators, isolating switches and fuses

Combined electrical appliances, contactors and starters are widely used in various fields such as machinery, electricity, electronics, etc., involving the control and distribution of electrical energy.

aspect. GB/T 14048 "Low-voltage switchgear and control equipment" is an important guide for low-voltage switchgear and control equipment related products in my country.

A series of standards, to be composed of 25 parts.

--- Part 1.General. The purpose is to specify general requirements for low-voltage switchgear and controlgear.

--- Part 2.Circuit breakers. The purpose is to specify product-related requirements such as performance requirements and test methods of circuit breakers.

--- Part 3.Switches, isolators, isolating switches and fuse combinations. The purpose is to specify switches, isolators, isolating switches

And the performance requirements and test methods of fuse combination electrical appliances and other product-related requirements.

--- Part 4-1.Contactors and motor starters Electromechanical contactors and motor starters (including motor protectors). target

The purpose is to specify the performance requirements and test methods of electromechanical contactors and motor starters (including motor protectors)

off requirements.

--- Part 4-2.Contactors and motor starters Semiconductor controllers and starters (including soft starters) for AC motors.

The purpose is to specify the performance requirements and test methods of semiconductor controllers and starters (including soft starters) for AC motors.

product related requirements.

--- Part 4-3.AC semiconductor controllers and contactors for contactors and motor starters for non-motor loads. aim at

It specifies product-related requirements such as performance requirements and test methods for AC semiconductor controllers and contactors for non-motor loads.

--- Part 5-1.Control circuit appliances and switching elements Electromechanical control circuit appliances. The purpose is to specify electromechanical control

Product-related requirements such as performance requirements and test methods of electrical appliances.

--- Part 5-2.Control circuit electrical appliances and switching elements proximity switches. The purpose is to specify the performance requirements and test of the proximity switch.

Test methods and other product-related requirements.

--- Part 5-3.Requirements for proximity switches (PDDB) with specified functions for control circuit appliances and switching elements under fault conditions

beg. The purpose is to specify product-related performance requirements and test methods for proximity switches with definite functions under fault conditions.

Require.

--- Part 5-4.Special test for the performance evaluation method of small-capacity contacts of control circuit appliances and switching elements. The purpose is to regulate

Special test requirements in the performance evaluation of fixed and small-capacity contacts.

--- Part 5-5.Control circuit electrical appliances and switching elements electrical emergency braking devices with a mechanical latch function. the purpose is

Specifies product-related requirements such as performance requirements and test methods for electrical emergency braking devices with mechanical latch function.

--- Part 5-6.Control circuit electrical appliances and switching elements Proximity sensors and switching amplifiers DC interface (NAMUR).

The purpose is to specify product-related requirements such as performance requirements and test methods for the DC interface of proximity sensors and switching amplifiers.

--- Part 5-7.Requirements for control circuit appliances and switching elements for proximity devices with analog outputs. The purpose is to stipulate

Product-related requirements such as performance requirements and test methods for proximity devices with analog outputs.

--- Part 5-8.Three-position enabling switch for control circuit electrical appliances and switching elements. The purpose is to specify the performance of the three-position enabling switch

Product-related requirements such as requirements and test methods.

--- Part 5-9.Control circuit appliances and switching elements flow switches. The purpose is to specify the performance requirements and test of the flow switch.

Test methods and other product-related requirements.

--- Part 6-1.Multifunctional electrical transfer switch electrical appliances. The purpose is to specify the performance requirements and test methods of transfer switch appliances

and other product-related requirements.

--- Part 6-2.Multifunctional electrical (equipment) control and protection switch electrical appliances (equipment) (CPS). The purpose is to provide for control and protection

Product-related requirements such as performance requirements and test methods of protective switch appliances.

--- Part 7-1.Terminal block for copper conductors of auxiliary devices. The purpose is to specify the performance requirements of the terminal block of copper conductors.

Seek and test methods and other product-related requirements.

--- Part 7-2.Protective conductor terminal block for copper conductors of auxiliary devices. The purpose is to specify the protective conductor connection of copper conductors.

Product-related requirements such as performance requirements and test methods of wire terminal blocks.

--- Part 7-3.Safety requirements for auxiliary device fuse terminal blocks. The purpose is to specify the fuse terminal block

Safety related requirements.

--- Part 7-4.PCB terminal block for copper conductors of auxiliary devices. The purpose is to specify a PCB terminal block for copper conductors

Product-related requirements such as performance requirements and test methods.

--- Part 7-5.Terminal blocks for aluminum conductors of auxiliary devices. The purpose is to specify the performance requirements of terminal blocks of aluminum conductors.

Seek and test methods and other product-related requirements.

--- Part 8.Built-in thermal protection (PTC) control unit for rotating electrical machines. The purpose is to specify built-in thermal protection for rotating electrical machines.

Product-related requirements such as performance requirements and test methods of the protection (PTC) control unit.

--- Part 9-1.Arc-fault active suppression system arc extinguishing appliances. The purpose is to specify the performance requirements and tests of arc extinguishing appliances

Methods and other product-related requirements.

--- Part 9-2.Arc fault active suppression system Internal arc detection and suppression equipment based on optical signals. The purpose is to regulate

Product-related requirements such as performance requirements and test methods for internal arc detection and suppression equipment based on optical signals.

This document considers not only the requirements for terminal blocks, but also the requirements for connectors specified in IEC 61984.2008, both due to

The uses are similar, so the related requirements are also very similar. Since the corrosion test in this document already includes requirements for moisture resistance, the

There is no need for additional moisture resistance test for the PCB terminal block.

Low-voltage switchgear and controlgear

Part 7-4.Auxiliary Devices

PCB terminal block for copper conductors

1 Scope

This document specifies the requirements for PCB terminal blocks intended primarily for industrial or similar purposes.

The copper conductors are mounted or fixed on the printed circuit board by soldering, press-fitting, or equivalent, so that an electrical or mechanical

connect.

This document applies to circuits with rated voltage AC not exceeding 1000V, frequency up to 1000Hz or DC not exceeding 1500V.

PCB terminals for treated or untreated copper conductors with a connection cross-sectional area of 0.08mm2~300mm2 (AWG28/600kcmil)

sub-row.

Note 1.The large-section terminal block is specially used for specially designed high-current PCBs. Keep the cross-sectional area range up to 300mm2 to cover everything possible

the use of. See Appendix C for examples of high-current PCBs and PCB terminal blocks.

Note 2.AWG is the abbreviation of "American Wire Gauge";

1kcmil=1000cmil=0.507mm2;

1cmil = 1 circular mil = area of a circle with a diameter of 1 mil;

1mil=1/1000 inch=0.0254mm.

This document can be used as a special specification with components (isolating devices, integral tubular fuse-links and similar components or conductors with other dimensions, etc.)

Guidelines for Type PCB Terminal Blocks.

Where applicable, when referring to IEC 60947-1.2020, the term "clamp" is used in this document instead of "terminal".

2 Normative references

The contents of the following documents constitute essential provisions of this document through normative references in the text. Among them, dated citations

documents, only the version corresponding to that date applies to this document; for undated references, the latest edition (including all amendments) applies to

this document.

GB/T 9789-2008 Sulfur dioxide corrosion test of metals and other inorganic coatings under normal condensation conditions (ISO 6988.

1985, IDT)

IEC 60068-2-20 Environmental testing part 2-20.Test test T. Test for resistance to soldering heat and solderability of equipment with conductors

Note. GB/T 2423.28-2005 Environmental Testing of Electrical and Electronic Products Part 2.Test Method Test T. Soldering (IEC 60068-2-20.1979, IDT)

IEC 60352-1 Solderless connections part 1.General requirements, test methods and guidance for use of wrap-around connections (Solderlesscon-

IEC 60352-2 Solderless connections Part 2.Crimp connections general requirements, test methods and guidelines for use (Solderlesscon-

Note. GB/T 18290.2-2015 Solderless connections Part 2.General requirements, test methods and usage guidelines for crimp connections (IEC 60352-2.

2006, IDT)

IEC 60352-3 Solderless connections Part 3.Accessible solderless insulation displacement connections General requirements, test methods and guidelines for use