GB/T 4706.70-2024Safety of household and similar electrical appliances - Part 70: Particular requirements for clocks (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 document is Part 70 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 4706.70-2008 "Particular requirements for safety clocks for household and similar electrical appliances" and is compatible with GB 4706.70-Compared with 2008, in addition to editorial changes, the main technical changes are as follows.

--- Changed the definition of the scope of the population that may encounter the common hazards of the equipment involved (see Chapter 1, Chapter 1 of the 2008 edition).

This document is equivalent to IEC 60335-2-26:2008 "Safety of Household and Similar Electrical Appliances Part 2-26.Special Requirements for Clocks" Require".

The following minimal editorial changes were made to this document.

--- The standard name was changed to "Safety of Household and Similar Electrical Appliances Part 70: Particular Requirements for Clocks" to enhance the standard system coordination.

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 that the appliance should have when used normally in accordance with the instructions for use.

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 respective functions as long as it is reasonable.

For each function of the appliance, if applicable, the effect of one function on other functions shall be considered.

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 in GB/T 4706.1-the relevant provisions of 2024 will be modified.

Safety of household and similar electrical appliances Part 70: Particular requirements for clocks

1 Scope

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

This document specifies the safety requirements for electronic clocks.

This document applies to electrical clocks with a rated voltage not exceeding 250V for single-phase appliances and a rated voltage not exceeding 480V for other appliances.

NOTE 101 Examples of appliances falling within the scope of this document.

---Alarm clock;

--- Spring-driven clocks with electric winding mechanisms;

--- Clocks equipped with drive devices other than electric motors.

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 cover.

---The following groups (including children).

- due to a physical, sensory or mental impairment, or - Due to lack of experience and knowledge, Circumstances that render them unable to use the equipment safely without supervision or instruction;

--- Condition of children's play equipment.

Note 102.Pay attention to the following.

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

--- National management departments may impose additional requirements on equipment.

Note 103.This document does not apply to.

---Battery-operated appliances;

---Appliances designed for industrial use;

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

--- Appliances with other functions (with or without time display), such as master clocks and timepieces for cookers, washing machines and similar appliances Timer;

--- Appliances for "automatic timing" purposes;

--- Appliances incorporating only electronic circuits (see IEC 60065).

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.

Normal operation

The clock works under the following conditions.