IEC 62271-106:2011 is applicable to a.c. contactors and\/or contactor-based controllers and motor-starters designed for indoor installation and operation at frequencies up to and including 60 Hz on systems having voltages above 1 000 V but not exceeding 24 000 V.
\nIt is applicable only to three-pole devices for use in three-phase systems, and single-pole devices for use in single-phase systems. Two-pole contactors and starters for use in single-phase systems are subject to agreement between manufacturer and user. This standard cancels and replaces the second edition of IEC 60470 published in 1999. It constitutes a technical revision. This edition includes the following significant technical changes with respect to IEC 60470:1999:
\n– Scope and object: The voltage range covered by the standard was expanded from 12 kV to 24 kV. Overload relay calibration and testing is not covered by this standard.
\n– 3 Terms and definitions: Added definitions for capacitor switching classes.
\n– 4.1 Rated voltage: Added 15, 17,5 and 24 kV as standard voltage values.
\n– 4.109.2 Starting duty of reduced-voltage starters: Added ratings for autotransformer and reactor starters (was in the testing section).
\n– 4.112 Rated capacitive switching currents: Added capacitor switching current ratings.
\n– 5.101 Protective relays: Removed the requirements for overload relays. This section is obsolete since there are only a few MV starters fitted with thermal overload relays and electronic relays have their own standards.
\n– 6.2.5 Application of the test voltage and test conditions (former 6.2.2 b)): Changed wording of requirement for impulse across the open gap of vacuum contactors.
\n– 6.4.2 Auxiliary circuits: The requirement for resistance checks of auxiliary circuits was deleted.
\n– 6.5.5.104 Temperature rise of the auto transformer or reactor for two step auto transformer or reactor starters: Reworded to transfer ratings to subclause 4.109.2.
\n– 6.102.9 Condition following making and breaking tests: Gave specific direction as to what the tolerance should be based on where the resistance was to be checked.
\n– 6.104 Short-circuit current making and breaking tests: Clarified test conditions for short-circuit testing.
\n– 6.109 Capacitive current switching tests: Added capacitive current switching tests.
\n– Annex B: Added Table B.1 – Tolerances on test quantities for type test.<\/p>\n
The contents of the corrigendum of February 2014 have been included in this copy.<\/p>\n","protected":false},"excerpt":{"rendered":"
High-voltage switchgear and controlgear – Part 106: Alternating current contactors, contactor-based controllers and motor-starters<\/b><\/p>\n\n\n
\n Published By<\/td>\n Publication Date<\/td>\n Number of Pages<\/td>\n<\/tr>\n \n IEC<\/b><\/a><\/td>\n 2011-08-19<\/td>\n 172<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n","protected":false},"featured_media":574152,"template":"","meta":{"rank_math_lock_modified_date":false,"ep_exclude_from_search":false},"product_cat":[516,2636],"product_tag":[],"class_list":{"0":"post-574139","1":"product","2":"type-product","3":"status-publish","4":"has-post-thumbnail","6":"product_cat-29-130-10","7":"product_cat-iec","9":"first","10":"instock","11":"sold-individually","12":"shipping-taxable","13":"purchasable","14":"product-type-simple"},"_links":{"self":[{"href":"https:\/\/pdfstandards.shop\/wp-json\/wp\/v2\/product\/574139","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/pdfstandards.shop\/wp-json\/wp\/v2\/product"}],"about":[{"href":"https:\/\/pdfstandards.shop\/wp-json\/wp\/v2\/types\/product"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/pdfstandards.shop\/wp-json\/wp\/v2\/media\/574152"}],"wp:attachment":[{"href":"https:\/\/pdfstandards.shop\/wp-json\/wp\/v2\/media?parent=574139"}],"wp:term":[{"taxonomy":"product_cat","embeddable":true,"href":"https:\/\/pdfstandards.shop\/wp-json\/wp\/v2\/product_cat?post=574139"},{"taxonomy":"product_tag","embeddable":true,"href":"https:\/\/pdfstandards.shop\/wp-json\/wp\/v2\/product_tag?post=574139"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}