GB/T 4706.18-2024 Safety of household and similar electrical appliances - Part 18: Particular requirements for battery chargers
1 Scope
This clause of GB/T 4706.1-2024 is replaced by the following.
This document specifies the safety requirements for household and similar battery chargers.
This part of lEC 60335 deals with the safety of electric battery chargers for household andsimilar use having an output not exceeding 250V ripple-free direct current, their rated voltage being not more than 250 V.
Battery chargers intended for charging batteries in a household end use application outsidethe scope of the lGB/T 4706 series of standards are within the scope of this document.
Requirements for battery chargers for use by children at least 8 years old without supervisionare given in Annex AA.
Battery chargers not intended for normal household use, but which nevertheless may be asource of danger to the public, such as battery chargers intended for use in garages, shops.light industry and on farms, are within the scope of this document.
As far as is practicable, this document deals with the common hazards presented byappliances that are encountered by all persons in and around the home. However, in generalit does not take into account
——persons (including children) whose
physical, sensory or mental capabilities; or
lack of experience and knowledge
prevents them from using the appliance safely without supervision or instruction;
——children playing with the appliance.
Note 101: Attention is drawn to the fact that
——for appliances intended to be used in vehicles or on board ships or aircraft, additional requirements may benecessary;
——in many countries additional requirements are specified by the national health authorities, the nationalauthorities responsible for the protection of labour and similar authorities.
Note 102: This document does not apply to
——built-in battery chargers, except those for installing in caravans and similar vehicles;
——battery chargers that are part of an appliance, the battery of which is not accessible to the user;
——battery chargers intended exclusively for industrial purposes;
——battery chargers intended to be used in locations where special conditions prevail, such as the presence of acorrosive or explosive atmosphere(dust, vapour or gas);
——battery chargers for emergency lighting(GB/T 7000.222);
——supply units for electronic equipment.
2 Normative references
This clause of GB/T 4706.1-2024 is applicable except as follows.
Addition:
GB/T 19212.5-2011 Safety of transformers,reactors,power supply units and similar products for supply voltages up to 1100 V - Part 5: Particular requirements and tests for isolating transformers and power supply units incorporating isolating transformers (IEC 61558-2-4:2009, IDT)
GB/T 19212.8-2012 Safety of power transformers power supplies reactors and similar products - Part 8:Particular requirements and tests for transformers and power supplies for toys (IEC 61558-2-7:2007, IDT)
IEC 60068-2-6 Environmental testing - Part 2-6: Tests Test Fc: Vibration (sinusoidal)
Note: GB/T 2423.10-2019, Environmental testing - Part 2: Tests methods - Test Fc: Vibration (sinusoidal) (IEC 60068-2-6:2007, IDT)
3 Terms and definitions
This clause of GB/T 4706.1-2024 is applicable except as follows.
3.1 Definitions relating to physical characteristics
3.1.1 Addition:
Note 1: The rated voltage is the rated input voltage.
3.1.6 Addition:
Note 2: The rated current is the rated input current
3.1.9 Replacement:
normal operation
operation of the appliance under the following conditions.
Battery chargers for charging lead-acid batteries, and other battery chargers having a ratedDC output current not exceeding 20 A, are connected to the circuit of Figure 101. The variable resistor is adjusted so that the current in the circuit is the rated DC output currentwhen the battery charger is supplied at rated voltage.
When the charging current is controlled by the state of charge of the battery, the variableresistor and the capacitor are replaced by a discharged battery of the type and having thelargest capacity specified in the instructions.
Other battery chargers are connected to a discharged battery of the type and having thelargest capacity specified in the instructions.
3.1.101
rated DC output voltage
output voltage assigned to the battery charger by the manufacturer
3.1.102
rated DC output current
output current assigned to the battery charger by the manufacturer
3.2 Definitions relating to means of connection
3.2.2 Addition:
Output flexible cords are not considered to be interconnection cords
3.4 Definition of Extra Low Voltage
3.4.3Replacement.
safetyisolating transformer
transformer, the input winding of which is electrically separated from the output winding by aninsulation at least equivalent to double insulation or reinforced insulation, that is intendedto supply a battery charging circuit having an output voltage not exceeding 120 V ripple-freedirect current
Note 1: Ripple-free means an r.m.s. ripple voltage not exceeding 10 % of the DC component.
3.5 Definitions relating to types of appliances
3.5.101
DC distribution board
panel having circuits for distributing DC power to socket-outlets or terminals
3.5.102
type 1 battery charger
battery charger the output circuit of which is supplied through a safety isolating transformer
3.5.103
type 2 battery charger
battery charger the output circuit of which is supplied through an isolating transformer
3.6 Definitions relating to parts of an appliance
3.6.101
isolating transformer
transformer, the input winding of which is electrically separated from the output winding by aninsulation at least equivalent to double insulation or reinforced insulation, that is intendedto supply a battery charging circuit having an output voltage not exceeding 250 Vripple-free DC
