| Reference |
P-IEC 62271-110 ed1.0 withdrawn corrigendum |
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|
| Title |
High-voltage switchgear and controlgear - Part 110: Inductive load switching
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| Publication date |
2005-06-24 |
Format, price
(Swiss francs)
and language |
 | 170.- |
| 53 pages |  | 170.- |
| 562 Kb |
|
| |
| Abstract |
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.
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| Technical Committee |
17A - High-voltage switchgear and controlgear
|
| ICS Codes |
| 29.130.10 |
High voltage switchgear and controlgear
*Including enclosed switchgear and controlgear |
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| Replaced by |
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