GB/T 4706.75-2024Safety of household and similar electrical appliances - Part 75: Particular requirements for fixed immersion heaters (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 for standardization documents" Drafting.

This part is Part 75 of GB/T 4706 "Safety of Household and Similar Electrical Appliances". GB/T 4706 has been published as follows part.

--- Part 1: General requirements;

--- Part 2: Particular requirements for electric irons;

--- Part 121: Particular requirements for professional ice cream machines.

This document replaces GB 4706.75-2008 "Particular requirements for the safety of fixed immersion heaters for household and similar electrical appliances" and is Compared with GB 4706.75-2008, in addition to structural adjustments and editorial changes, the main technical changes are as follows.

--- Changed the user groups not considered in this document (see Chapter 1, Chapter 1 of the 2008 edition);

--- Changed the expression of "temperature controller" to "thermal controller" (see 11.7 and 19.2, 11.7 and 19.2 of the 2008 edition);

--- Changed the expression of "storage/supply tank" to "sink-fed water tank" (see 7.12.1 and 19.2, 7.12.1 and 19.2 of the 2008 edition) 19.2).

This document is equivalent to IEC 60335-2-73:2009 "Safety of Household and Similar Electrical Appliances Part 2-73.Fixed Immersion Heaters Special requirements for heaters.

The following minimal editorial changes were made to this document.

--- The name of the standard is changed to "Safety of Household and Similar Electrical Appliances - Part 75: Particular Requirements for Fixed Immersion Heaters Requirement" to enhance the coordination of the standard system.

Introduction

GB/T 4706 "Safety of Household and Similar Electrical Appliances" adopts most of IEC 60335.On this basis, GB/T 4706 refers to the structure of IEC 60335 is divided into several parts, consisting of general requirements and special requirements. Part 1 is general requirements, and the other parts are for products covered by special requirements, their safety requirements are general requirements used in combination with the special requirements.

The requirements include supplements and modifications to the corresponding clauses in the general requirements to provide complete requirements for each product.

This document is the protection requirements for electrical, mechanical, thermal, fire and radiation risks when the appliance is used normally in accordance with the instructions.

This document also covers abnormal conditions that may occur during use and considers how electromagnetic interference may affect the safe operation of the equipment.

This document has taken into account the requirements specified in GB/T 16895 "Low Voltage Electrical Installations". The appliance is connected to the power supply in accordance with the electrical wiring rules.

requirements are coordinated.

If multiple functions of an appliance involve other parts of GB/T 4706, the other parts shall apply to the appliance separately as long as it is reasonable.

Each function. If applicable, consider the impact of one function on other functions.

When no additional requirements are given in other parts for hazards already included in this document, GB/T 4706.1 applies.

GB/T 4706 is a standard covering appliance safety and takes precedence over general standards/horizontal standards covering the same subject.

This document is used in conjunction with GB/T 4706.1-2024 "Safety of Household and Similar Electrical Appliances Part 1: General Requirements".

The part marked "applicable" in the document indicates that the corresponding clauses in GB/T 4706.1-2024 are applicable to this document; the part marked "replaces" in this document indicates that the corresponding clauses in GB/T 4706.1-2024 are applicable to this document.

For the parts marked as "added" in this document, in addition to complying with GB/T 4706.1-2024, the provisions in this document shall prevail.

In addition to the corresponding clauses, the clauses added in the clauses of this document must also be complied with; the part of this document marked "modified" means that the corresponding clauses of GB/T 4706.1-2024 shall be modified.

Safety of household and similar electrical appliances Part 75: Particular requirements for fixed immersion heaters

1 Scope

This chapter of GB/T 4706.1-2024 is replaced by the following content.

This document specifies the safety requirements for stationary electric immersion heaters for household and similar purposes.

This document applies to single-phase appliances with a rated voltage not exceeding 250V and other appliances with a rated voltage not exceeding 480V, and is intended to be installed in Stationary electric immersion heaters for household and similar purposes, used in water tanks to heat water to temperatures below the boiling point.

NOTE 101 The water in the tank may be heated by other means, for example by circulating hot water from a separate boiler.

NOTE 102 Immersion heaters as alternative heating sources in centrally-fired boilers with a rated input power not exceeding 25 kW are also within the scope of this document.

This document also applies to appliances which are not intended for normal household use but which may nevertheless present a hazard to the public, for example, those intended for use in shops, in light industry, Tools used by non-professionals in industry and on farms.

As far as is practical, the common hazards presented by the various appliances covered by this document are those that are present in the home and its surroundings.

However, in general this document does not consider the following situations.

--- The following groups of people (including children) cannot use the appliance safely without supervision or guidance.

- due to physical, sensory or mental impairment; or - Due to lack of experience and knowledge.

--- Condition of children's play equipment.

Note 103.Pay attention to the following.

--- For equipment intended for use on vehicles, ships or aircraft, some additional requirements may be required;

--- National authorities may impose additional requirements on equipment.

Note 104.This document does not apply to.

---Apparatus specially designed for industrial use;

--- Apparatus intended for use in special environments where there are often corrosive or explosive gases (such as dust, steam or methane);

--- Electric heating elements used in the following appliances.

-Liquid heating appliances (GB/T 4706.19);

- Storage water heater (GB/T 4706.12);

- Instantaneous water heater (GB/T 4706.11);

---Aquarium heaters (GB/T 4706.67);

--- Portable immersion heater (GB/T 4706.77);

---Engine preheaters for cars, buses, etc.

2 Normative references

This chapter of GB/T 4706.1-2024 is applicable.

3 Terms and definitions

Except for the following contents, this chapter of GB/T 4706.1-2024 applies.

3.1.9 Replaces.