GB/Z 37754-2019 Active National standards

GB/Z 37754-2019 Guidance on clearances and creepage distances in particular for distances equal to or less than 2 mm—Test results of research on influencing parameters

Publish Date: 2019-06-04 Implement Date: 2020-01-01 For services related to genuine standard inquiry, procurement, translation, and other related services in China, please Contact Us

Basic Information

Standard Code: GB/Z 37754-2019

Standard Type: National standards

Standard Status: Active

is_force_gb: no

CCS Name: Low-voltage electrical equipment

ICS Name: Insulation system

Publish Date: 2019-06-04

Implement Date: 2020-01-01

Pages: 27 pages

Scope

This guidance technical document describes the research results of the determination method of electrical clearance and creepage distance not exceeding 2 mm in printed circuit boards and similar structural components. In these structures, the electrical clearance and creepage distance follow the same path along the solid insulating surface.
The information provided in this guidance technical document is only research results and is not applicable to the determination of electrical clearance and creepage distance in equipment within low-voltage systems (the corresponding requirements can be found in GB/T 16935.1). However, the relevant electrical clearance and creepage distance dimensions can be used as a reference during functional design.
This guidance technical document presents the research results under the following circumstances:
——Electrical clearance independent of the microenvironment;
——Creepage distance for pollution levels 1, 2, and 3, which is also applicable to small-pitch products with a similar printed circuit board design;
——Creepage distance to avoid flashover on the insulating surface;
——Information on the minimum creepage distance required to maintain minimum insulation resistance.
This guidance technical document specifies a test method for evaluating the water absorption groups of unclassified insulating materials surfaces.