1.1 Scope and object<\/b><\/p>\n
This part of IEC 60947 applies to CONTROL CIRCUIT DEVICES and SWITCHING ELEMENTS intended for controlling, signalling, interlocking, etc., of switchgear and controlgear.<\/p>\n
It applies to CONTROL CIRCUIT DEVICES having a rated voltage not exceeding 1 000 V a.c. (at a frequency not exceeding 1 000 Hz) or 600 V d.c.<\/p>\n
However, for operational voltages below 100 V a.c. or d.c., see note 2 of 4.3.1.1.<\/p>\n
This standard applies to specific types of CONTROL CIRCUIT DEVICES such as:<\/p>\n
\n–\u00a0\u00a0\u00a0\u00a0manual control switches, for example PUSHBUTTONS, ROTARY SWITCHES, FOOT SWITCHES, etc.;<\/p>\n
–\u00a0\u00a0\u00a0\u00a0electromagnetically operated control switches, either time-delayed or instantaneous, for example contactor relays;<\/p>\n
–\u00a0\u00a0\u00a0\u00a0PILOT SWITCHES, for example pressure switches, temperature sensitive switches (thermostats), PROGRAMMERS, etc.;<\/p>\n
–\u00a0\u00a0\u00a0\u00a0POSITION SWITCHES, for example CONTROL SWITCHES operated by part of a machine or mechanism;<\/p>\n
–\u00a0\u00a0\u00a0\u00a0associated control circuit equipment, for example indicator lights, etc.<\/p>\n<\/blockquote>\n
NOTE 1 A CONTROL CIRCUIT DEVICE includes (a) CONTROL SWITCH(ES) and associated devices such as (an) indicator light(s).NOTE 2 A CONTROL SWITCH includes (a) SWITCHING ELEMENT(S) and an actuating system.NOTE 3 A SWITCHING ELEMENT may be a contact element or a SEMICONDUCTOR ELEMENT.<\/p>\n
It also applies to specific types of SWITCHING ELEMENTS associated with other devices (whose main circuits are covered by other standards) such as:<\/p>\n
\n–\u00a0\u00a0\u00a0\u00a0auxiliary contacts of a switching device (e.g. contactor, circuit breaker. etc.) which are not dedicated exclusively for use with the coil of that device;<\/p>\n
–\u00a0\u00a0\u00a0\u00a0interlocking contacts of enclosure doors;<\/p>\n
–\u00a0\u00a0\u00a0\u00a0control circuit contacts of ROTARY SWITCHES;<\/p>\n
–\u00a0\u00a0\u00a0\u00a0control circuit contacts of overload relays.<\/p>\n<\/blockquote>\n
Contactor relays shall also meet the requirements and tests of IEC 60947-4-1 except for the utilization category which shall comply with this standard.<\/p>\n
This standard does not include the relays covered in IEC 60255 or automatic electrical control devices for household and similar purposes.<\/p>\n
The colour requirements of indicator lights, PUSHBUTTONS, etc., are found in IEC 60073 and also in publication 2 of the International Commission of Illumination (CIE).<\/p>\n
The object of this standard is to state:<\/p>\n
\na)\u00a0\u00a0\u00a0\u00a0The characteristics of CONTROL CIRCUIT DEVICES.<\/p>\n
b)\u00a0\u00a0\u00a0\u00a0The electrical and mechanical requirements with respect to:<\/p>\n
\n1)\u00a0\u00a0\u00a0\u00a0The various duties to be performed.<\/p>\n
2)\u00a0\u00a0\u00a0\u00a0The significance of the rated characteristics and of the markings.<\/p>\n
3)\u00a0\u00a0\u00a0\u00a0The tests to verify the rated characteristics.<\/p>\n<\/blockquote>\n
c)\u00a0\u00a0\u00a0\u00a0The functional requirements to be satisfied by the CONTROL CIRCUIT DEVICES with respect to:<\/p>\n
\n1)\u00a0\u00a0\u00a0\u00a0Environmental conditions, including those of enclosed equipment.<\/p>\n
2)\u00a0\u00a0\u00a0\u00a0Dielectric properties.<\/p>\n
3)\u00a0\u00a0\u00a0\u00a0Terminals.<\/p>\n<\/blockquote>\n<\/blockquote>\n
1.1DV Modification of 1.1 by adding the following:<\/b><\/p>\n
In the United States, with respect to the National Installation codes, equipment operating at more than 600 V is considered high-voltage equipment. In Canada, with respect to the National Installation codes, equipment operating at more than 750 V is considered high-voltage equipment.<\/p>\n<\/p>\n<\/p>\n<\/p>\n<\/p><\/p>\n","protected":false},"excerpt":{"rendered":"
Low-Voltage Switchgear and Controlgear \u2013 Part 5-1: Control Circuit Devices and Switching Elements \u2013 Electromechanical Control Circuit Devices<\/b><\/p>\n
\n\n
\n Published By<\/td>\n Publication Date<\/td>\n Number of Pages<\/td>\n<\/tr>\n \n UL<\/b><\/a><\/td>\n 2014-03-28<\/td>\n 140<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n","protected":false},"featured_media":694519,"template":"","meta":{"rank_math_lock_modified_date":false,"ep_exclude_from_search":false},"product_cat":[2680],"product_tag":[],"class_list":{"0":"post-694509","1":"product","2":"type-product","3":"status-publish","4":"has-post-thumbnail","6":"product_cat-ul","8":"first","9":"instock","10":"sold-individually","11":"shipping-taxable","12":"purchasable","13":"product-type-simple"},"_links":{"self":[{"href":"https:\/\/pdfstandards.shop\/wp-json\/wp\/v2\/product\/694509","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\/694519"}],"wp:attachment":[{"href":"https:\/\/pdfstandards.shop\/wp-json\/wp\/v2\/media?parent=694509"}],"wp:term":[{"taxonomy":"product_cat","embeddable":true,"href":"https:\/\/pdfstandards.shop\/wp-json\/wp\/v2\/product_cat?post=694509"},{"taxonomy":"product_tag","embeddable":true,"href":"https:\/\/pdfstandards.shop\/wp-json\/wp\/v2\/product_tag?post=694509"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}