
High-voltage switchgear and controlgear Part 110: Inductive load switching
出版:International Electrotechnical Committee

專家解讀視頻
Applicable to a.c. circuit-breakers designed for indoor or outdoor installation, for operation at frequencies of 50 Hz and 60 Hz on systems having voltages above 1000 V and applied for inductive current switching with or without additional short-circuit current breaking duties. The standard is applicable to circuit-breakers in accordance with IEC 62271-100 that are used to switch high-voltage motor currents and shunt reactor currents and also to high-voltage contactors used to switch high-voltage motor currents. Switching unloaded transformers, i.e. breaking transformer magnetizing current, is not considered in this standard. The reasons for this are as follows: a) due to the non-linearity of the transformer core, it is not possible to correctly model the switching of transformer magnetizing current using linear components in a test laboratory. Tests conducted using an available transformer, such as a test transformer, will only be valid for the transformer tested and cannot be representative for other transformers; b) as detailed in the guide for application of IEC 62271-100 and IEC 60694, the characteristics of this duty are usually less severe than any other inductive current switching duty. It should be noted that such a duty may produce severe overvoltages within the transformer winding(s) depending on the circuit-breaker re ignition behaviour and transformer winding resonance frequencies. Short-line faults, out-of-phase current making and breaking and capacitive current switching are not applicable to circuit-breakers applied to switch shunt reactors or motors. These duties are therefore not included in this standard.
CEI EN 62271-110 Ed. 1 (2006) - Identical
SN EN 62271-110:2005 - Identical
BS EN 62271-110:2005 - Identical
DIN EN 62271-110 (2006-07) - Identical
VDE 0671-110:2006 - Identical
NF EN 62271-110:2006 - Identical
I.S. EN 62271-110:2005 - Identical
UNE EN 62271-110:2006 - Identical
SS EN 62271-110 Ed. 1 (2005) - Identical
PN EN 62271-110:2007 - Identical
NEN EN IEC 62271-110:2005 - Identical
AS 62271.110-2006 (R2016) - Identical
OVE/ONORM EN 62271-110:2006 - Identical