This document provides guidance upon the design, construction, specification and testing of circuit-breakers with intentional non-simultaneous pole operation which are excluded from the scope of IEC 62271-100. In all other respects the scope of this document is identical to that of IEC 62271-100. This document provides supplementary information and guidance for this type of circuit-breaker and is intended to be used in conjunction with IEC 62271-100.Intentional non-simultaneous pole operation may be implemented by mechanical or electrical means and both methods are within the scope of this document. Where the implementation is by purely electrical means for