CEI 17-129

BILINGUAL

This part of IEC 62271 provides guidance on 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
technical report is identical to that of IEC 62271-100. This
technical report 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 technical report. Where the implementation is by
purely electrical means, for example for independent pole operated
circuit-breakers, adequate precautions should be taken in the
application to prevent operation outside the proven capability of
the circuit-breaker.

Circuit-breakers with intentional non-simultaneous pole
operation are mainly used for the implementation of controlled
switching, and this technical report primarily addresses the
requirements of circuit-breakers for such applications. More
detailed information regarding the use of controlled switching can
be found in CIGRE Technical Brochures 262 [1]⁽¹⁾, 263
[2] and 264 [3]. Requirements for associated protection and/or
control facilities are not covered unless these form an integral
part of the circuit-breaker.

This technical report considers two basic system configurations
for achieving nonsimultaneous operation:

– a circuit-breaker intended for non-simultaneous operation
which is supplied and tested independent from any particular
controller;

-a circuit-breaker intended for non-simultaneous operation with
a dedicated controller (which may be integrated into the
circuit-breaker) and necessary sensors and auxiliary equipment
which form part of the tested equipment.

The basic requirements in each case are identical, however the
interpretation of the test results depends upon whether the
intended controller is included in the test programme. Further
details on this aspect are incorporated into Clause 6 of this
technical report.

For the purposes of this technical report, it has been assumed
that there is no significant interaction between the effects of the
various parameters (for example ambient temperature, control
voltage etc) which are considered to affect the mechanical
performance of the circuitbreaker. This has not been proven for all
combinations however service experience with controlled switching
suggests this assumption is valid in practice for most commonly
used drive technologies. Annex F provides some examples in support
of this assumption.

(1) Figures in square brackets refer to the bibliography.