| Publication CODE |
Title |
| IEC 62271-110:2005 (2005-06) |
HIGH-VOLTAGE SWITCHGEAR AND CONTROLGEAR - PART 110: INDUCTIVE LOAD SWITCHING |
| |
| Price Excl. VAT |
Total number of pages, tables and drawings |
|
201.00 €
|
53. |
Description
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.
|
| Class |
C990
(IEC PUBLICATIONS IEC PUBLICATIONS)
|
| Committee |
TC 17/SC 17A
HIGH-VOLTAGE SWITCHGEAR AND CONTROLGEAR
|
| Responsible |
Ir DELENS Marc
|
| BEC Approval |
2005-06-24 |
| ICS-Code (International Standards Classification) |
35.040
|
|
| IEC publication date |
2005-06-24 |
| IEC last modification date |
2009-01-26 |
|
