GB/T 14048.12-2025Low-voltage switchgear and controlgear - Part 4-3: Contactors and motor-starters - Semiconductor controllers and semiconductor contactors for non-motor loads (English PDF)

Foreword

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

Drafting.

This document is Part 4-3 of GB/T 14048 "Low-voltage switchgear and controlgear". GB/T 14048 has published the following...

part.

---Part 1: General Provisions;

---Part 2: Circuit Breakers;

---Part 3: Switches, Isolators, Disconnecting 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 (including Soft Starters) for AC Motors;

---Part 4-3.Contactors and Motor Starters. AC Semiconductor Controllers and Contactors for Non-Motor Loads;

---Part 5-1.Control Circuit Appliances and Switching Elements - Electromechanical Control Circuit Appliances;

---Part 5-2.Control Circuits, Electrical Appliances, and Switching Elements (Proximity Switches);

---Part 5-3.Control Circuitry and Switching Elements. Proximity Switches (PDDBs) with Defined Functionality under Fault Conditions Require;

---Part 5-4.Special Tests for Performance Evaluation of Small-Capacity Contacts in Control Circuits and Switching Elements;

---Part 5-5.Electrical emergency braking devices with mechanical latching function, including control circuitry and switching elements;

---Parts 5-6.Control Circuit Electrical Appliances and Switching Elements DC Interface for Proximity Sensors and Switching Amplifiers (NAMUR);

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

---Parts 5-8.Control Circuit Electrical Appliances and Switching Elements - Three-position Enable Switch;

---Parts 5-9.Control Circuits, Electrical Appliances, and Switching Elements; Flow Switches;

---Part 6-1.Multifunctional Electrical Transfer Switches;

---Part 6-2.Multifunctional Electrical Appliances (Equipment) Control and Protection Switchgear (Equipment) (CPS);

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

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

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

---Part 7-4.PCB terminal blocks with copper conductors for auxiliary components;

---Part 7-5.Terminal blocks for aluminum conductors in auxiliary components;

---Part 8: Built-in Thermal Protection (PTC) Control Unit for Rotating Electrical Machines;

---Part 9-1.Arc extinguishing devices for active arc fault suppression systems.

This document replaces GB/T 14048.12-2016 "Low-voltage switchgear and controlgear - Part 4-3.Contactors and motor starting".

"AC Semiconductor Controllers and Contactors for Non-Motor Loads" has been revised compared to GB/T 14048.12-2016, except for structural adjustments and editing.

Aside from the sexual alterations, the main technical changes are as follows.

---Added provisions that do not apply to this document (see Chapter 1);

---Added security-related aspects.

- General requirements (see 8.1.1);

- Energy-constrained circuits (see 8.1.14);

- Electronic circuits (see 8.1.1);

---Dedicated wiring accessories have been added (see 6.1, 6.3, 8.1.1, 9.1.2, 9.1.3);

--- Power consumption measurement has been added (see 8.2.4.4, 9.3.3.2).

This document is equivalent to IEC 60947-4-3:2020 "Low-voltage switchgear and controlgear – Part 4-3.Contactors and motors".

Semiconductor controllers and semiconductor contactors for non-motor loads of actuators.

Please note that some content in this document may involve patents. The issuing organization of this document assumes no responsibility for identifying patents.

This document was proposed by the China Electrical Equipment Industry Association.

This document is under the jurisdiction of the National Technical Committee on Standardization of Low Voltage Electrical Appliances (SAC/TC189).

Introduction

Low-voltage switchgear and control equipment are produced in large quantities and are widely used, including products such as circuit breakers, isolators, disconnector switches and fuse combinations, etc.

Contactors and starters are widely used in various fields such as machinery, power, and electronics, involving multiple aspects such as the control and distribution of electrical energy.

GB/T 14048 "Low-voltage switchgear and controlgear" is an important series of standards guiding related products of low-voltage switchgear and controlgear in my country.

The standard is planned to consist of 25 parts.

---Part 1: General Provisions. This section aims to specify the general requirements for low-voltage switchgear and controlgear.

---Part 2: Circuit Breakers. This section specifies the performance requirements and test methods for circuit breakers, as well as other product-related requirements.

---Part 3: Switches, Isolators, Disconnecting Switches and Fuses Combinations. The purpose is to specify the components of switches, isolators, disconnecting switches, and fuses.

Product-related requirements, such as performance requirements and test methods for fuse combination electrical appliances.

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

The key is to specify the performance requirements and test methods for electromechanical contactors and motor starters (including motor protectors), etc.

Relevant 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 for semiconductor controllers and starters (including soft starters) for AC motors.

Product-related requirements.

---Part 4-3.Contactors and Motor Starters. AC Semiconductor Controllers and Contactors for Non-Motor Loads. The purpose is to...

The product-related requirements include performance requirements and test methods for AC semiconductor controllers and contactors used for non-motor loads.

---Part 5-1.Control Circuit Appliances and Switching Elements - Electromechanical Control Circuit Appliances. The purpose is to specify electromechanical control circuit appliances.

Product-related requirements, such as the performance requirements and testing methods for electrical circuit components.

---Part 5-2.Control Circuits, Electrical Appliances, and Switching Elements - Proximity Switches. The purpose is to specify the performance requirements and testing procedures for proximity switches.

Product-related requirements such as testing methods.

---Part 5-3.Requirements for control circuit electrical components and switching elements of proximity switches (PDDBs) to maintain their specified function under fault conditions the purpose is to specify the performance requirements and test methods for proximity switches that have a defined function under fault conditions, and other product-related requirements.

Require.

---Part 5-4.Special Tests for Performance Evaluation of Small-Capacity Contacts in Control Circuits and Switching Elements. The purpose is to...

Special test requirements are specified for the performance evaluation of small-capacity contacts.

---Part 5-5.Electrical emergency braking devices with mechanical latching function, including control circuitry and switching elements. The purpose is to...

The regulations specify the performance requirements and test methods for electrical emergency braking devices with mechanical latching functions, as well as other relevant product requirements.

---Parts 5-6.Control Circuit Electrical Appliances and Switching Elements DC Interface for Proximity Sensors and Switching Amplifiers (NAMUR) the purpose is to specify the performance requirements and test methods for the DC interfaces of proximity sensors and switching amplifiers, as well as other product-related requirements.

---Parts 5-7.Requirements for control circuitry and switching elements for proximity devices with analog outputs. The purpose is to specify...

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

---Parts 5-8.Control Circuit Electrical Appliances and Switching Elements - Three-position Enable Switch. The purpose is to specify the performance characteristics of three-position enable switches.

Product-related requirements, such as requirements and testing methods.

---Parts 5-9.Control Circuits, Electrical Appliances, and Switching Elements - Flow Switches. The purpose is to specify the performance requirements and testing procedures for flow switches.

Product-related requirements such as testing methods.

---Part 6-1.Multifunctional Electrical Transfer Switches. The purpose is to specify the performance requirements and test methods for transfer switches.

Requirements related to products such as [illegible]

---Part 6-2.Multifunctional Electrical Appliances (Equipment) - Control and Protection Switchgear (CPS). The purpose is to specify control and protection switching equipment.

Product-related requirements, such as performance requirements and test methods for protective switching devices.

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

Requirements and testing methods, etc., related to the product.

---Part 7-2.Protective Conductor Terminal Blocks for Auxiliary Devices' Copper Conductors. The purpose is to specify the protective conductor terminals for copper conductors.

Product-related requirements, such as performance requirements and test methods for terminal blocks.

---Part 7-3.Safety Requirements for Auxiliary Devices Fuse Terminal Blocks. The purpose is to specify the safety requirements for fuse terminal blocks.

Safety-related requirements.

---Part 7-4.PCB Terminal Blocks with Copper Conductors for Auxiliary Components. The purpose is to specify PCB terminal blocks with copper conductors.

Product-related requirements, such as performance requirements and testing methods.

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

Requirements and testing methods, etc., related to the product.

---Part 8: PTC (Positioned Thermal Protection) Control Units for Rotating Electrical Machines. The purpose is to specify the PTC control units for rotating electrical machines.

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

---Part 9-1.Arc-extinguishing devices for active arc fault suppression systems. The purpose is to specify the performance requirements and testing procedures for arc-extinguishing devices.

Product-related requirements such as methods.

---Part 9-2.Active Arc Fault Suppression System - Internal Arc Detection and Suppression Device Based on Optical Signals. The purpose is to regulate...

Define the performance requirements and test methods for internal arc detection and suppression equipment based on optical signals, as well as other product-related requirements.

This document includes low-voltage semiconductor controllers and semiconductor contactors (solid-state contactors) for non-motor loads. As a semiconductor controller...

In addition to simply turning on and off non-motor loads, contactors possess many other functions and characteristics. As semiconductor contactors, they have similar mechanical contact...

It has the same function as the contactor, but uses one or more semiconductor switching devices in its main electrode.

These electrical appliances can be single-pole or multi-pole (see 3.5.1 in GB/T 14048.1-2023). This document specifies that all necessary heat dissipation is included.

The complete electrical appliance, including materials and wiring terminals, is considered as a unit. If the manufacturer provides information on how to select a radiator and how to connect the electrical components...

When providing detailed information about the installation of the appliance on the radiator, the user can specify whether the unassembled radiator required for assembly can be provided with the appliance, or...

Not provided.

Low-voltage switchgear and control equipment Part 4-3.Contactors and Motor Starters Semiconductor controllers for non-motor loads and Semiconductor contactor

1 Scope

This document applies to semiconductor controllers and semiconductor contactors that connect non-motor loads to circuits, with a rated voltage not exceeding [a certain value].

1000VAC.

It covers the following uses.

--- An operation used to change the state of an AC circuit between an on and off state;

---Electrical appliances with or without bypass switches;

---As a controller, it is used to reduce the amplitude of the AC voltage RMS value.

This document does not apply to.

---Electromechanical contactors (see GB/T 14048.4);

---Short-circuit protection devices related to semiconductor controllers and semiconductor contactors [see GB/T 14048.4(MPSD)], GB/T 14048.2 and GB/T 14048.3);

---Semiconductor motor controllers or soft starter electrical appliances (see GB/T 14048.6);

---Semiconductor converters [see GB/T 3859 (all parts)];

---Solid-state relays (see GB/T 36640);

---For use in explosive atmospheres [see GB/T 3836 (all parts)];

---Software and firmware requirements (see GB/Z 41912);

---Regarding cybersecurity (see GB/Z 43030).

The contactors and control circuitry used in semiconductor controllers and semiconductor contactors are considered to comply with their respective product standards.

If mechanical switching devices are used, they are considered to meet the requirements of their own IEC product standards and the additional requirements of this document.

The purpose of this document is to specify the following.

---Characteristics of semiconductor controllers and semiconductor contactors;

---Semiconductor controllers and semiconductor contactors meet the following conditions.

a) Operating performance under normal and abnormal conditions, including overcurrent conditions;

b) Dielectric properties;

c) Enclosure protection rating (if applicable);

d) Structural requirements, including protection against electric shock, fire risk, and mechanical risk;

---Verify the experiments and methods used to meet the above conditions;

---Information provided on the appliance or in the manufacturer's documentation.

2 Normative references

The contents of the following documents, through normative references within the text, constitute essential provisions of this document. Dated citations are not included.

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