GB/T 2681-1981
Abolished
NB/T 11729-2024
Active
Industry standards-Energy
NB/T 11729-2024 The method of insulation coordination for the 27.5kV system in high-altitude environments
NB/T 11729-2024 The method of insulation coordination for the 27.5kV system in high-altitude environments
Price:
$ 20.00
Basic Information
Standard Code:
NB/T 11729-2024
Standard Type:
Industry standards
Standard Status:
Active
is_force_gb:
no
CCS Name:
Basic standards and general methods
ICS Name:
Comprehensive Electrical Engineering
Publish Date:
2024-12-25
Implement Date:
2025-06-25
Scope
This document proposes the general principles of insulation coordination for 27.5 kV systems in plateau environments, describes the corresponding methods, and provides the insulation coordination procedures for electrical equipment in AC 27.5 kV systems, as well as the relevant voltages and main factors to be considered. This document is applicable to the insulation coordination of 27.5 kV systems in areas with altitudes ranging from 1,000 m to 5,500 m. The 35 kV system is used for reference.
Development Information
Related Standards
GB/T 2682-1981
Abolished
GB/T 2682-1981 Colors of indicator lights and push-buttons used in electrical assembly devices
GB/T 3926-1983
Replaced
GB/T 3926-1983 Rated voltage for medium frequency equipment
GB/T 4064-1983
Abolished
GB/T 4064-1983 General guide for designing of electrical equipment to satisfy safety requirements
GB/T 4776-1984
Replaced
GB/T 4776-1984 Electrical safety terminology
GB/T 5080.4-1985
Active