Preface
This is the first edition of CSA C22.2 No. 354, Solid-state circuit breakers, one of a series of standards issued by CSA Group under Part II of the Canadian Electrical Code.
For general information about the standards of the Canadian Electrical Code, Part II, see the Preface to CSA C22.2 No. 0.
This Standard is considered suitable for use for conformity assessment within the stated scope of the Standard.
This Standard was prepared by the Subcommittee on Molded Case Circuit Breakers, Molded Case Switches, and Circuit Breaker Enclosures, under the jurisdiction of the Technical Committee on Industrial Products and the Strategic Steering Committee on Requirements for Electrical Safety, and has been formally approved by the Technical Committee.
This Standard has been developed in compliance with Standards Council of Canada requirements for National Standards of Canada. It has been published as a National Standard of Canada by CSA Group.
Scope
1.1
This Standard applies to solid-state circuit breakers (SSCBs) and solid-state hybrid circuit breakers (SSHCBs) using semiconductor switching technology intended for applications where overcurrent protection complies with CSA C22.1.
1.2
This Standard applies to
a) solid-state circuit breakers (SSCBs) and switches (SSCSs) with air gap isolation; and
b) solid-state hybrid circuit breakers (SSHCBs) and hybrid switches (SSHCSs).
1.3
This Standard applies to both single and multi-pole devices with ratings up to 1000 Vac and 1500 Vdc.
1.4
Clauses 4 to 22 of this standard apply to solid-state circuit breakers and solid-state hybrid circuit breakers.
Clauses 23 to 34 of this standard apply to solid-state switches and solid-state hybrid circuit switches.
1.5
The general requirements for molded case circuit breakers, molded case switches, and circuit breaker enclosures can be found in CSA C22.2 No. 5. This Standard applies to construction and performance requirements for solid-state circuit breakers and solid-state switches.
1.6
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.
