DL/T 404-2007
Alternating-Current metal-enclosed Switchgear and controlgear for rated voltages above 3.6kV and up to and including 40.5kV (English Version)

Standard No.

DL/T 404-2007

Language

Chinese, Available in English version

Release Date

2007

Published By

Professional Standard - Electricity

Status

Be replaced 2019-05

Replace By

DL/T 404-2018

Latest

DL/T 404-2018

Replace

DL/T 404-1997

Scope

This standard specifies the technical requirements for AC metal-enclosed equipment and control equipment with a rated voltage of 3.6kV~40.5kV, a frequency of 50Hz, installed indoors or outdoors, and assembled in a factory. The enclosure may contain fixed or removable components and may be filled with insulating fluid (liquid or gas). This standard divides metal-enclosed switchgear and control equipment into several categories based on the following two points: 　——The continuity of power grid operation when repairing switchgear and control equipment; 　——The need and convenience of equipment maintenance. For metal enclosed shape equipment and control equipment with inflatable compartments, this standard only applies to inflatable compartments with a design pressure not exceeding 0.3MPa (relative pressure). Special-purpose metal-enclosed switchgear and control equipment, such as those used in places with flammable gases, in mines or on ships, may need to add corresponding technical requirements. Each component installed in metal-enclosed switchgear and control equipment shall be designed and tested in accordance with the provisions of the respective standards. This standard supplements the standards for individual components by taking into account their installation in switchgear and control equipment. This standard does not preclude the use of different equipment within the same enclosure. In this case, the impact of the equipment used on the shape of the equipment and the control equipment should be considered.

DL/T 404-2007 Referenced Document

• DL/T 593-2006 Common specifications for high-voltage switchgear and controlgear standards
• GB 16926 High-voltage alternating current switch-fuse combinations*， 2009-03-19 Update
• GB 1984-2003 High-voltage alternating-current circuit-breakers
• GB 1985 High-voltage alternating-current disconnectors and earthing switches*， 2014-06-24 Update
• GB 3804 High-voltage alternating-current switches for rated voltage above 3.6 kV and less than 40.5 kV
• GB/T 11022 Common specifications for high-voltage alternating-current switchgear and controlgear standards*， 2020-12-14 Update
• GB/T 1408.1 Insulating materials.Test methods for electric strength.Part 1:Test at power frequencies*， 2016-12-13 Update
• GB/T 14808-2001 High-voltage alternating current contactors and contactor-based motor-starters
• GB/T 16927.1-1997 High-voltage test techniques. Part 1: General test requirements
• GB/T 2900.20 Electrotechnical terminology.High-voltage switchgear and controlgear*， 2016-02-24 Update
• GB/T 4208 Degrees of protection provide by enclosure (IP code)*， 2017-07-31 Update
• GB/T 7354 High-voltage test techniques—Partial discharge measurements*， 2018-09-17 Update
• GB/T 8905 The guide for management and measuring SF<下标6> gas in electrical equipment*， 2012-11-05 Update

DL/T 404-2007 history

• 2018 DL/T 404-2018 Indoor AC high voltage switchgear panel
• 2007 DL/T 404-2007 Alternating-Current metal-enclosed Switchgear and controlgear for rated voltages above 3.6kV and up to and including 40.5kV
• 1997 DL/T 404-1997 Indoor AC high voltage switchgear panel