Safety of household and similar electrical appliances - Part 91 : Particular requirements for electric fence energizers
1 Scope
This clause of GB/T 4706.1-2024 is replaced by the following.
This standard specifies the safety of electric fence energizers.
This standard applies to the electric fence energizers with the rated voltage not more than 250 V and by means of which fence wires in agricultural, domestic or feral animal control fences and security fences may be electrified or monitored.
Note 101: Examples of electric fence energizers coming within the scope of this standard are:
– mains-operated energizers;
– battery-operated electric fence energizers suitable for connection to the mains, as shown in Figure 101 and Figure 102;
– electric fence energizers operated by non-rechargeable batteries either incorporated or separate.
This standard does not in general take into account
– the use of appliances by young children or infirm persons without supervision;
– the playing with appliances by young children.
Note 102: Attention is drawn to the fact that
– for appliances intended to be used on board ships or aircraft, additional requirements can be necessary;
– in many countries, additional requirements are specified by the national health authorities concerned.
Note 103: This standard does not apply to
– electromagnetically coupled animal trainer collars;
– appliances intended to be used in locations where special conditions prevail, such as the presence of a corrosive or explosive atmosphere (dust, vapour or gas);
– separate battery chargers (GB/T 4706.18);
– electric fishing machines (GB/T 4706.103);
– electric animal-stunning equipment (GB/T 4706.97);
– appliances for medical purposes [IEC 60601(all parts)].
2 Normative references
This clause of GB/T 4706.1-2024 is applicable except as follows.
Addition:
GB/T 2423.18-2021 Environmental testing - Part 2 : Test methods - Test Kb : Salt mist, cyclic (sodium chloride solution) (IEC 60068-2-52:2017, IDT)
ISO 3864-1 Graphical symbols - Safety colours and safety signs - Part 1: Design principles for safety signs and safety markings
Note: GB/T 2893.1-2013 Graphical symbols - Safety colours and safety signs - Part 1 : Design principles for safety signs and safety markings (ISO 3864-1:2011, MOD)
IEC 60320-3 Appliance couplers for household and similar general purposes - Part 3: Standard sheets and gauges
Note: GB/T 17465.6-2022 Appliance couplers for household and similar general purposes - Part 3 : Standard sheets and gauges (IEC 60320-3:2018, MOD)
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: For type D energizers, the rated voltage of the energizer is the rated voltage for battery supply.
Replacement:
3.1.9
normal operation
operation of the appliance under the following conditions: the electric fence energizer (3.5.101) is operated as in normal use when connected to the supply, with no load connected to the output terminals
3.1.101
prospective peak voltage
peak output voltage of the impulse generator specified in Clause 14 that would be obtained with the energizer not connected to the test circuit
3.1.102
rated voltage for battery supply
voltage for battery supply, for type A energizers, type B energizers, type C energizers and type D energizers assigned to the energizer by the manufacturer
3.1.103
rated voltage range for battery supply
voltage range for battery supply, for type A energizers, type B energizers, type C energizers and type D energizers assigned to the energizer by the manufacturer, expressed by its lower and upper limits
3.1.104
impulse duration
duration of that part of the impulse that contains 95 % of the overall energy and is the shortest interval of integration of I2t that gives 95 % of the integration of I2t over the total impulse
Note 1: I(t) is the impulse current as a function of time.
3.1.105
output current
RMS value of the output current per impulse calculated over the impulse duration
3.5 Definitions and terms relating to types of appliances
3.5.101
electric fence energizer
appliance that is intended to deliver periodically voltage impulses to a fence connected to it
Note: Electric fence energizers are hereinafter also referred to as energizers.
3.5.102
mains-operated energizer
energizer designed for direct connection to the mains
3.5.103
battery-operated energizer suitable for connection to the mains
The following energizers:
– operated by batteries and having, or being designed for connection to, facilities for charging these batteries from the mains, or
– designed for operation from the mains and from batteries
3.5.104
type A energizer
battery-operated energizer suitable for connection to the mains consisting of an impulse generating circuit, a battery charging circuit and a battery, the impulse generating circuit being connected to the mains or the battery when the energizer is in operation
Note: Type A energizers are shown schematically in Figure 101.
3.5.105
type B energizer
battery-operated energizer (3.5.103) suitable for connection to the mains consisting of an impulse generating circuit, a battery charging circuit and a battery, the impulse generating circuit being connected to the battery and disconnected from the battery charging circuit and the mains when the energizer is in operation.
Note 1: For recharging the battery, the impulse generating circuit is disconnected and rendered inoperable.
Note 2: Type B energizers are shown schematically in Figure 101.
3.5.106
type C energizer
battery-operated energizer (3.5.103) suitable for connection to the mains consisting of an impulse generating circuit and a battery, the impulse generating circuit being connected to the mains or the battery when the energizer is in operation, and where it is necessary to remove the battery to recharge it using a battery charger or, in the case of a non-rechargeable battery, to replace it with a new battery
Note: Type C energizers are shown schematically in Figure 101.
3.5.107
type D energizer
battery-operated energizer (3.5.103) suitable for connection to the mains consisting of an impulse generating circuit intended to be powered by a battery, the impulse generating circuit being connected to the mains or the battery when the energizer is in operation, and where it is necessary to remove the battery to recharge it using a battery charger or, in the case of a non-rechargeable battery, to replace it with a new battery.
Note: Examples of Type D energizers are shown schematically in Figure 102.
3.5.108
battery-operated energizer
energizer deriving its energy solely from batteries or other sources of energy and not designed for connection to the mains
3.5.109
security electric fence energizer
energizer containing fence circuits (3.6.101) that are intended to periodically deliver voltage impulses into electric security fences
Note: A security electric fence energizer is hereinafter also referred to as a security energizer.
3.5.110
independently timed security energizer
security energizer fence that includes an internal impulse timing signal source to set the timing of the periodic voltage impulses it delivers to an electric security fence (3.6.108)
Note: An independently timed security energizer is hereinafter also referred to as an independent security energizer.
3.5.111
dependently timed security energizer
security energizer that is dependent on an external impulse timing signal to set the timing of the periodic voltage impulses it delivers to an electric security fence (3.6.108)
Note 1: A dependently timed security energizer is hereinafter also referred to as dependent security energizer.
Note 2: Some types of security energizer may be configured either as an independent security energizer or a dependent security energizer at the time of installation.
