Interpretation of the new standard industry development must pass the way

Standards are the basis of product quality. Understanding standards and implementing standards are also an important task in improving product quality. When we implement the standards and ensure product quality as the basic principles of the company, ubiquitous lamps and lanterns will provide safe and harmonious work. , living and entertainment environments enable people to fully enjoy the happy life brought about by light.

The significance of the standard

GB7000.1-2007 "Luminaires Part 1: General Requirements and Tests" was issued on November 12, 2007 and implemented on January 1, 2009.

As a general requirement and test standard in lighting safety standards, GB7000.1 is cited by other standards of the GB7000 series and is the basic standard for lighting safety. Compared with the 2002 version, GB7000.1-2007 has changed a lot, such as the deletion of the category 0 lamps and lanterns in the lighting classification, the increase of the abnormal conditions during the durability test, and the extension of the abnormal circuit conditions of the lamps and lanterns in the rectification effect test. Scope, etc. These changes will have an impact on the lighting appliance industry, especially the lighting industry.

Differences between old and new basic standards

For the implementation of the GB7000.1-2007 standard, the authors present the main differences between GB7000.1-2007 and the previous edition of GB7000.1-2002 "General safety requirements and tests for lamps and lanterns" (hereinafter referred to as "old standards"). analysis.

(a) The new standard has deleted Category 0 lamps

Definition of Class 1.0, Class I, Class II and Class III lamps

According to the type of protection against electric shock, lamps can be classified as Type 0, Type I, Type II or Type III lamps. Their definitions are as follows:

(1) 0 type lamps

Relies on basic insulation as a lamp to protect against electric shock. This means that the easily accessible conductive parts of the lamp (if such parts) are not connected to the protective conductors in the fixed wiring of the facility, and in case of basic insulation failure, they have to rely on the environment.

(2) Type I lamps

Lamp protection against electric shock not only depends on basic insulation, but also includes additional safety measures, ie, accessible conductive parts are connected to the protective grounding conductor in the fixed wiring of the facility so that the easily accessible conductive parts in case of basic insulation failure Not charged.

(3) Type II lamps

The protection against electric shock of the lamps and lanterns not only depends on the basic insulation, but also has additional safety measures, such as double insulation or reinforced insulation, without protective grounding or relying on installation conditions.

(4) Class III lamps

The protection against electric shock relies on the power supply voltage being a safety extra-low voltage (SELV) and does not produce luminaires that are higher than the SELV voltage.

The necessity of the deletion of 2.0 luminaires

(1) Basic rules for protection against electric shock

Under normal conditions or under single fault conditions, hazardous live parts should not be touched, and accessible conductive parts should not be hazardous live parts.

Protection under normal conditions is provided by basic protection and protection under a single fault condition is provided by fault protection. Enhanced protection measures provide protection for both situations.

(2) Normal conditions

To meet the requirements for protection against electric shock under normal conditions in the basic rules for protection against electric shock, basic protection is essential.

(3) Single fault condition

A single fault is considered when any of the following conditions occur:

Accessible non-hazardous live parts become dangerous live parts (for example, due to failures that limit steady-state contact current and charge measures); or accessible live parts where uncharged electrically conductive parts become dangerous under normal conditions ( For example, damage due to basic insulation of the exposed electrically conductive portion); or hazardous live parts accessible (eg due to mechanical damage of the housing).

To meet the requirements for protection against electric shock under single fault conditions in the basic rules for protection against electric shock, the use of fault protection is essential. This protection can be achieved using the following methods:

Use further protection measures that do not depend on basic protection; or use enhanced protection measures that combine both basic protection and fault protection.

Type 0 luminaires use basic insulation as basic protection without fault protection measures. Type 0 luminaires are used only in non-conductive environments. Type I lamps are protected by equipotential bonding, ie, basic insulation is used as a basic protective measure, and equipotential bonding is used as a failure protection measure. Type II lamps are protected by double insulation or reinforced insulation, ie, basic insulation is used as a basic protective measure, and additional insulation is used as a failure protection measure or reinforced insulation that can provide basic protection and fault protection functions. Class III luminaires are protected by SELV in protective measures against electrical quantities.

Compared with Class I, Class II, and Class III lamps, since Class 0 lamps use basic insulation as basic protection without fault protection measures, they have the basic rules for protection against electric shock. Therefore, in the GB7000.1-2007 will be deleted from the class 0 lamps.

3. The new standard increases the requirement for protection against electric shock on the outer surface of lamps that the basic insulating parts cannot be used without accidental contact.