Preferred voltage levels for AC systems up to 50 000 V

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CSA Group
Standards Development Organisation:
Working Program:
Designation Number:
CSA C235:19
Standard Type:
National Standard of Canada - Domestic
Standard Development Activity:
Reaffirmation
ICS code(s):
29.020
Status:
Open for SDO comment
SDO Comment Period Start Date:
SDO Comment Period End Date:
Posted On:

Scope:

Scope


1.1

This Standard establishes steady-state voltage operating ranges at point of connection for AC power systems in Canada. It serves to provide guidance

 

a) to national committees on utilization and control equipment for establishing standard ratings of such equipment on a basis coordinated with power system voltages;

 

b) to power system designers so that new systems will be designed to accommodate standard ratings of equipment and devices;

 

c) to power system operators and to electrical energy users for determining suitable voltage performance and the need for corrective measures, with respect to existing systems, to accommodate current designs of equipment and devices; and

 

d) towards a uniform system of voltage selections in the country without any suggestion that each utility will supply every voltage listed. The establishment of standards on this basis is aimed at future development towards more uniformity on a national basis.

 

This Standard includes nominal voltages and supply steady-state voltage ranges at point of connection under both normal and extreme operating conditions.

 

This Standard does not include voltage operating ranges at utilization points.

 

1.2

In this Standard, "shall" is used to express a requirement, i.e., a provision that the user is obliged to satisfy in order to comply with the standard; "should" is used to express a recommendation or that which is advised but not required; and "may" is used to express an option or that which is permissible within the limits of the Standard.

 

Notes accompanying clauses do not include requirements or alternative requirements; the purpose of a note accompanying a clause is to separate from the text explanatory or informative material.

 

Notes to tables and figures are considered part of the table or figure and may be written as requirements.

 

Annexes are designated normative (mandatory) or informative (non-mandatory) to define their application.

Project need:

Project Need

To review the Standard within the required 5 year period.

Note: The information provided above was obtained by the Standards Council of Canada (SCC) and is provided as part of a centralized, transparent notification system for new standards development. The system allows SCC-accredited Standards Development Organizations (SDOs), and members of the public, to be informed of new work in Canadian standards development, and allows SCC-accredited SDOs to identify and resolve potential duplication of standards and effort.

Individual SDOs are responsible for the content and accuracy of the information presented here. The text is presented in the language in which it was provided to SCC.