GB/T 31887.4-2023 Cycles - Lighting and retro-reflective devices - Part 4: Lighting systems powered by the cycle’s movement
1 Scope
This document specifies requirements and test methods for the performance of lighting systems powered by the cycle’s movement. It applies to light devices complying with GB/T 31887.1-2019. Lighting systems include lighting devices and power supplied by cycle’s movement such as generator.
This document is applicable to lighting systems used on cycles intended to be used on public roads and, especially, bicycles complying with ISO 4210-2 and ISO 8098.
2 Normative references
The following documents, in whole or in part, are normatively referenced in this document and are indispensable for its application. For dated references, only the edition cited applies. For undated references, the latest edition of the referenced document (including any amendments) applies.
GB/T 31887.1-2019 Cycles - Lighting and retro-reflective devices - Part 1: Lighting and light signalling devices
ISO 6742-1 Cycles - Lighting and retro-reflective devices - Part 1: Lighting and light signalling devices
ISO 9227 Corrosion tests in artificial atmospheres - Salt spray tests
IEC 60529 Degrees of protection provided by enclosures (IP Code)
3 Terms and definitions
For the purposes of this document, the terms and definitions given in ISO 6742-1 and the following apply.
3.1
frictional drive generator
generator for which the rotor or stator is linked to a pulley which press against the driving wheel over a swivel bearing through force
3.2
positive drive generator
generators which are not concerned by the definition of frictional drive generator (3.1)
3.3
integrated lamp and power source
system including power source and at least one type of light designed to be used together, closed system
Note 1: Power generator characteristics are depending of vehicle movement.
Note 2: Light output performances are depending of the speed of the vehicle, or the time during which bicycle has been stopped.
4 Lamps and interchangeable generators
4.1 General
The complete system shall be designed as open system which requires compatibility between lamps and generators.
4.2 Requirements
4.2.1 Dynamo-operated front lights
Dynamo-operated front lights (lamps emitting light to the front) shall correspond with the requirements of GB/T 31887.1-2019, 4.2 (Front position lamp), 4.5 (Low beam) and 4.6 (High beam).
Voltage limiting resources shall only become effective above the test voltage. Here, the value of the DC voltage, U, corresponds with the root mean square of the AC voltage, Ueff .
Furthermore:
——the nominal voltage of the light source shall be equal to the system voltage or the light source shall be powered via an appropriate electronic ballast;
——the lighting effect shall be deployed at 3 Ueff at the latest;
——the lighting evaluation shall be performed at test voltage;
——the power consumption shall be ≤110 % of the nominal value;
——the power consumption shall be 2.4 W or less at the test voltage;
——electronic ballasts in these units shall have the corresponding electrical rating.
Head lamps with integrated capacitor to power the light while halting shall be built so that the load of the entire equipment on the supply system is not substantially higher than that intended for this equipment according to GB/T 31887.1-2019, 4.8. The entire equipment shall fulfil the necessary requirements at test voltage, where, based on a discharged capacitor, a charging time of 120 s using test voltage is permissible and the reduction of the dynamo voltage through the charging of the capacitor shall correspond with the following conditions:
a) not exceeding 60 % after 15 s;
b) not exceeding 37 % after 30 s;
c) not exceeding 15 % after 60 s;
d) not exceeding 5 % after 90 s;
e) not exceeding 1.5 % after 120 s.
Any stand light shall emit visible light for at least 240 s.
4.2.2 Dynamo-operated rear lights
Dynamo-operated rear lights (lamps emitting light to the rear) shall correspond with the requirements of GB/T 31887.1-2019, 4.3 (Rear lamp), 4.4 (Stop lamp) and 4.8 (Stand light). And the power consumption shall be 0,6 W or less at the test voltage.
Rear lamps with integrated stand lights shall be built so that the load of the entire equipment on the supply system is not substantially higher than that intended for this equipment. The entire equipment shall fulfil the necessary requirements at test voltage, where, based on a discharged capacitor, a charging time of 120 s using test voltage is permissible and the reduction of the dynamo voltage through the charging of the capacitor shall correspond with the following conditions:
a) not exceeding 60 % after 15 s;
b) not exceeding 37 % after 30 s;
c) not exceeding 15 % after 60 s;
d) not exceeding 5 % after 90 s;
e) not exceeding 1.5 % after 120 s.
Any stand light shall emit visible light for at least 240 s.
4.2.3 Dynamos
4.2.3.1 General characteristics of generators
For measurements according to 4.3.3, voltage and power of dynamos shall meet the values of Table 1.
For generators, for which the outputs characteristics are depending on diameter of the wheel, the minimum values given in Table 1 of the voltage and the efficiency refer to the largest outside diameter of the wheel as provided by the manufacturer. The measurement of the maximum values in Table 1 of the voltage refers to the smallest outside diameter of the wheel as stated by the manufacturer.
Standard
GB/T 31887.4-2023 Cycles—Lighting and retro-reflective devices—Part 4: Lighting systems powered by the cycle's movement (English Version)
Standard No.
GB/T 31887.4-2023
Status
to be superseded
Language
English
File Format
PDF
Word Count
10000 words
Price(USD)
300.0
Implemented on
2023-12-1
Delivery
via email in 1~3 business day
Detail of GB/T 31887.4-2023
Standard No.
GB/T 31887.4-2023
English Name
Cycles—Lighting and retro-reflective devices—Part 4: Lighting systems powered by the cycle's movement
GB/T 31887.4-2023 Cycles - Lighting and retro-reflective devices - Part 4: Lighting systems powered by the cycle’s movement
1 Scope
This document specifies requirements and test methods for the performance of lighting systems powered by the cycle’s movement. It applies to light devices complying with GB/T 31887.1-2019. Lighting systems include lighting devices and power supplied by cycle’s movement such as generator.
This document is applicable to lighting systems used on cycles intended to be used on public roads and, especially, bicycles complying with ISO 4210-2 and ISO 8098.
2 Normative references
The following documents, in whole or in part, are normatively referenced in this document and are indispensable for its application. For dated references, only the edition cited applies. For undated references, the latest edition of the referenced document (including any amendments) applies.
GB/T 31887.1-2019 Cycles - Lighting and retro-reflective devices - Part 1: Lighting and light signalling devices
ISO 6742-1 Cycles - Lighting and retro-reflective devices - Part 1: Lighting and light signalling devices
ISO 9227 Corrosion tests in artificial atmospheres - Salt spray tests
IEC 60529 Degrees of protection provided by enclosures (IP Code)
3 Terms and definitions
For the purposes of this document, the terms and definitions given in ISO 6742-1 and the following apply.
3.1
frictional drive generator
generator for which the rotor or stator is linked to a pulley which press against the driving wheel over a swivel bearing through force
3.2
positive drive generator
generators which are not concerned by the definition of frictional drive generator (3.1)
3.3
integrated lamp and power source
system including power source and at least one type of light designed to be used together, closed system
Note 1: Power generator characteristics are depending of vehicle movement.
Note 2: Light output performances are depending of the speed of the vehicle, or the time during which bicycle has been stopped.
4 Lamps and interchangeable generators
4.1 General
The complete system shall be designed as open system which requires compatibility between lamps and generators.
4.2 Requirements
4.2.1 Dynamo-operated front lights
Dynamo-operated front lights (lamps emitting light to the front) shall correspond with the requirements of GB/T 31887.1-2019, 4.2 (Front position lamp), 4.5 (Low beam) and 4.6 (High beam).
Voltage limiting resources shall only become effective above the test voltage. Here, the value of the DC voltage, U, corresponds with the root mean square of the AC voltage, Ueff .
Furthermore:
——the nominal voltage of the light source shall be equal to the system voltage or the light source shall be powered via an appropriate electronic ballast;
——the lighting effect shall be deployed at 3 Ueff at the latest;
——the lighting evaluation shall be performed at test voltage;
——the power consumption shall be ≤110 % of the nominal value;
——the power consumption shall be 2.4 W or less at the test voltage;
——electronic ballasts in these units shall have the corresponding electrical rating.
Head lamps with integrated capacitor to power the light while halting shall be built so that the load of the entire equipment on the supply system is not substantially higher than that intended for this equipment according to GB/T 31887.1-2019, 4.8. The entire equipment shall fulfil the necessary requirements at test voltage, where, based on a discharged capacitor, a charging time of 120 s using test voltage is permissible and the reduction of the dynamo voltage through the charging of the capacitor shall correspond with the following conditions:
a) not exceeding 60 % after 15 s;
b) not exceeding 37 % after 30 s;
c) not exceeding 15 % after 60 s;
d) not exceeding 5 % after 90 s;
e) not exceeding 1.5 % after 120 s.
Any stand light shall emit visible light for at least 240 s.
4.2.2 Dynamo-operated rear lights
Dynamo-operated rear lights (lamps emitting light to the rear) shall correspond with the requirements of GB/T 31887.1-2019, 4.3 (Rear lamp), 4.4 (Stop lamp) and 4.8 (Stand light). And the power consumption shall be 0,6 W or less at the test voltage.
Rear lamps with integrated stand lights shall be built so that the load of the entire equipment on the supply system is not substantially higher than that intended for this equipment. The entire equipment shall fulfil the necessary requirements at test voltage, where, based on a discharged capacitor, a charging time of 120 s using test voltage is permissible and the reduction of the dynamo voltage through the charging of the capacitor shall correspond with the following conditions:
a) not exceeding 60 % after 15 s;
b) not exceeding 37 % after 30 s;
c) not exceeding 15 % after 60 s;
d) not exceeding 5 % after 90 s;
e) not exceeding 1.5 % after 120 s.
Any stand light shall emit visible light for at least 240 s.
4.2.3 Dynamos
4.2.3.1 General characteristics of generators
For measurements according to 4.3.3, voltage and power of dynamos shall meet the values of Table 1.
For generators, for which the outputs characteristics are depending on diameter of the wheel, the minimum values given in Table 1 of the voltage and the efficiency refer to the largest outside diameter of the wheel as provided by the manufacturer. The measurement of the maximum values in Table 1 of the voltage refers to the smallest outside diameter of the wheel as stated by the manufacturer.
