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GB/T 14048.5-2017: Low-voltage switchgear and controlgear -- Part 5-1: Control circuit devices and switching element -- Electromechanical control circuit devices Delivery: 9 seconds. True-PDF full-copy in English & invoice will be downloaded + auto-delivered via email. See step-by-step procedure Status: Valid GB/T 14048.5: Historical versions
Similar standardsGB/T 14048.5-2017: Low-voltage switchgear and controlgear -- Part 5-1: Control circuit devices and switching element -- Electromechanical control circuit devices---This is an excerpt. Full copy of true-PDF in English version (including equations, symbols, images, flow-chart, tables, and figures etc.), auto-downloaded/delivered in 9 seconds, can be purchased online: https://www.ChineseStandard.net/PDF.aspx/GBT14048.5-2017 NATIONAL STANDARD OF THE PEOPLE’S REPUBLIC OF CHINA ICS 29.120.40 K 31 Replacing GB/T 14048.5-2008 Low-voltage switchgear and controlgear - Part 5-1.Control circuit devices and switching element - Electromechanical control circuit devices (IEC 60947-5-1.2016, MOD) Issued on. NOVEMBER 01, 2017 Implemented on. MAY 01, 2018 Issued by. General Administration of Quality Supervision, Inspection and Quarantine of the PRC; Standardization Administration of the PRC. Table of ContentsForeword... 4 1 General... 8 2 Terms and definitions... 12 3 Classification... 22 4 Characteristics... 23 5 Product information... 29 6 Normal service, mounting and transport conditions... 32 7 Constructional and performance requirements... 34 8 Tests... 45 Annex A (Normative) Electrical ratings based on utilization categories (see 3.1)... 66 Annex B (Normative) Example of inductive test loads for d.c. contacts... 68 Annex C (Normative) Special tests - Durability tests... 70 Annex D Vacant... 74 Annex E (Normative) Items subject to agreement between manufacturer and user.. 75 Annex F (Normative) Class II control circuit devices insulated by encapsulation - Requirements and tests... 76 Annex G (Normative) Additional requirements for control circuit devices with integrally connected cables... 81 Annex H (Normative) Additional requirements for semiconductor switching elements for control circuit devices... 84 Annex J (Normative) Special requirements for indicator lights and indicating towers ... 91 Annex K (Normative) Special requirements for control switches with direct opening action... 99 Annex L (Normative) Special requirements for mechanically linked contact elements ... 105 Annex M (Normative) Terminal marking, distinctive number and distinctive letter for control circuit devices... 109 Annex N (Normative) Procedure to determine reliability data for electromechanical devices in control circuits used in functional safety applications... 115 Bibliography... 118Foreword“Low-voltage switchgear and controlgear” consists of the following parts. - Part 1.General rules; - Part 2.Circuit-breakers; - Part 3.Switches, disconnectors, switch-disconnectors and fuse- combination units; - Part 4-1.Contactors and motor-starters - Electromechanical contactors and motor-starters (Including motor protector); - Part 4-2.Contactors and motor starters - Semiconductor controllers and starters for AC motors (including soft starters); - Part 4-3.Contactors and motor-starters - AC semiconductor controllers and contactors for non-motor loads; - Part 5-1.Control circuit devices and switching element - Electromechanical control circuit devices; - Part 5-2.Control circuit appliances and switching elements - Proximity switches; - Part 5-3.Control circuit devices and switching elements - Requirements for proximity devices with defined behaviour under fault conditions (PDDB); - Part 5-4.Control circuit devices and switching elements - Method of assessing the performance of low-energy contacts - Special tests; - Part 5-5.Control circuit devices and switching elements - Electrical emergency stop device with mechanical latching function; - Part 5-6.Control circuit devices and switching elements - DC interface for proximity sensors and switching amplifiers (NAMUR); - Part 5-7.Control circuit devices and switching elements - Requirements for proximity devices with analogue output; - Part 5-8.Control circuit devices and switching elements - Three-position enabling switches; - Part 5-9.Control circuit devices and switching elements - Flow rate switches; - Part 6-1.Multiple function equipment - Transfer switching equipment; - Section 6-2.Multiple function equipment control and protective switching devices (or equipment) (CPS); - Part 7-1.Ancillary equipment - Terminal blocks for copper conductors; - Part 7-2.Ancillary equipment - Protective conductor terminal blocks for copper conductors; - Part 7-3.Ancillary equipment - Safety requirements for fuse terminal blocks; - Part 8.Control units for built-in thermal protection (PTC) for rotating electrical machines. This Part is Part 5-1 of “Low-voltage switchgear and controlgear”. This Part is drafted in accordance with the rules given in GB/T 1.1-2009. This Part replaces GB/T 14048.5-2008 “Low-voltage switchgear and controlgear - Part 5-1.Control circuit devices and switching element - Electromechanical control circuit devices”. As compared with GB/T 14048.5-2008, the main technical changes of this Part are as follows. - Delete the characteristic requirements related to the overvoltage of make- break operation (see 4.9 of the 2008 edition); - ADD polarity requirements for contact elements (see 4.10); - ADD the information content which the manufacturer shall provide [see 5.1 o)~5.1 p)]; - Modify the marking requirements for terminals, emergency stop, etc. (see 5.2.1~5.2.4; 5.2.1~5.2.4 of the 2008 edition); - ADD the requirements for glow-wire testing and test based on flammability category (see 7.1.2.2, 7.1.2.3); - Modify the requirements for clearances and creepage distances; and directly QUOTE the corresponding provisions of IEC 60947-1 (see 7.1.4; 7.1.3 of the 2008 edition); - ADD requirements related to maximum recovery time (see 7.2.8); - Modify the requirements related to immunity (see 7.3.2; 7.3 of the 2008 edition); - ADD types of special tests which can be performed, including damp heat, salt mist, vibration, and shock tests, etc. (see 8.1.5); - ADD requirements of electrical performance and ageing test for screwless- type clamping units (see 8.2.4.7~8.2.4.8); - ADD speed requirements for movement rotary switches (see 8.3.2.1); - Modify the requirements for adjustment of prospective current in the test circuit and test quantities (see 8.3.4.3; 8.3.4.3 of the 2008 edition); - ADD EMC tests (see 8.4); - ADD Figure 10 “Voltage drop measurement at contact point of the clamping unit or terminal” (see 8.4.4); - Delete Annex D “Clearances and creepage distances of control circuit devices” and left vacant; - Modify the provisions of pulling force for cable in the pull-out test (see G.8.2.2; G.8.1.1 of the 2008 edition); - Modify the general requirements for EMC verification test and immunity test of control circuit devices with semiconductor switching elements (see H.8.7.1~H.8.7.2; H.8.7.1~H.8.7.2 of the 2008 edition); - Delete the requirements related to lens color (see Annex J); - ADD the provisions of terminal marking, distinctive number, and distinctive letter for control circuit devices (see Annex M); - ADD the provisions of “Procedure to determine reliability data for electromechanical devices in control circuits used in functional safety applications” (see Annex N). This Part uses redraft law to modify and adopt IEC 60947-5-1.2016 “Low- voltage switchgear and controlgear - Part 5-1.Control circuit devices and switching elements - Electromechanical control circuit devices”. The technical differences between this Part and IEC 60947-5-1.2016 and their reasons are as follows. - About normative references, this Part has made adjustments with technical differences, to adapt to the technical conditions of China. The adjustments are reflected in Clause 2 “Normative references”. The specific adjustment is as follows. ADD the national standard GB/T 14048.1-2012 “Low-voltage switchgear and controlgear - Part 1.General rules”. - In 7.1.2.1 “General requirements”, the requirement for humidity resisting qualities of materials is changed to “in accordance with the provisions of Annex K of GB/T 14048.1-2012”. Since IEC 60947-5-1.2016 does not put forward specific requirements, only “special attention shall be called” is written, which cannot meet the actual test verification needs in China, so this requirement is modified; - ADD subclause 8.2.1.2 “Humidity resisting qualities test” to the content related to materials in Clause 8 “Tests”. Since this Part has modified the specific requirements for humidity resisting qualities of materials in 7.1.2.1, this content is added. This Part was proposed by China Electrical Equipment Industry Association. This Part shall be under the jurisdiction of National Technical Committee 189 on Low-voltage Apparatus of Standardization Administration of China (SAC/TC 189). Drafting organizations of this Part. Shanghai Electrical Apparatus Research Institute; Zhejiang CHINT Electrics Co., Ltd.; Xiamen Hongfa Electrical Safety & Controls Co., Ltd.; Shanghai Liangxin Electrical Co., Ltd.; Omron Automation (China) Co., Ltd.; Shanghai Renmin Electrical Apparatus Works, Shanghai Electric; Shanghai Tayee Electric Co., Ltd.; Shanghai Branch of Schneider Electric (China) Co., Ltd.; Siemens Electrical Apparatus Ltd., Suzhou; Delixi Electric Co., Ltd.; FATO Mechanical and Electrical Equipment Group Co., Ltd.; Suzhou Electrical Apparatus Science Research Institute Co., Ltd.; People Electric Appliance Group Co., Ltd.; Changan Group Co., Ltd.. Main drafters of this Part. Zhang Lili, Li Hui, Xiao Tifeng, Cao Yong, Li Yuchun, Cui Yulan, Zheng Yan, Chen Xiao, Wang Yixu, Zhu Lin, Li Xinye, Gao Wenle, Zhang Jie, Bao Zhizhou, Wang Xuchuan. The previous editions of the standard replaced by this Part were released as follows. - GB 14048.5-1993, GB 14048.5-2001, GB/T 14048.5-2008. Low-voltage switchgear and controlgear - Part 5-1.Control circuit devices and switching element - Electromechanical control circuit devices1 GeneralThis Part of “Low-voltage switchgear and controlgear” applies to control circuit devices and switching elements intended for controlling, signalling, interlocking, etc., of switchgear and controlgear.2 Terms and definitionsAn assembly of one or more control switches fixed on the same panel or located in the same enclosure. A contactor relay with specified time-delay characteristics.3 ClassificationControl switches may be classified according to the contact element and the Distinction is made according to how the time delay of a switching element is achieved, e.g. electrical delay, magnetic delay, mechanical delay, or pneumatic delay.4 CharacteristicsThe normal use of a control switch is to close, maintain and open circuits in accordance with the utilization category shown in Table 1.Also refer to Table 4. Pilot switches having two or more contact elements which are not individually adjustable may have different operating and return values for each contact element.5 Product informationActuators may be identified by symbols in the form of engravings. If a stop- button carries any symbol engraved or marked on the actuator, then this symbol shall be a circle or an oval (signifying the value zero). The symbols circle or oval shall be used for stop-buttons only.6 Normal service, mounting and transport conditionsClause 6 of IEC 60947-1.2007+A1.2010+A2.2014 applies with the following additions. The device, with or without the sealing gasket indicated by the manufacturer, shall be capable of being mounted on any thickness of panel between 1 mm and 6 mm, if necessary by the use of packing piece(s) supplied for the purpose.7 Constructional and performance requirementsThe actuator shall preferably latch in the actuated position with the control contact open. This latching shall be released by a separate action, e.g. by pulling, rotation, or by means of a key.8 TestsRoutine tests are the responsibility of the manufacturer and are usually limited to a mechanical inspection and a verification of the mechanical operation. In certain cases, specified in Annex F, the inspection is supplemented by a dielectric test. ......Source: Above contents are excerpted from the full-copy PDF -- translated/reviewed by: www.ChineseStandard.net / Wayne Zheng et al. Tips & Frequently Asked Questions:Question 1: How long will the true-PDF of English version of GB/T 14048.5-2017 be delivered?Answer: The full copy PDF of English version of GB/T 14048.5-2017 can be downloaded in 9 seconds, and it will also be emailed to you in 9 seconds (double mechanisms to ensure the delivery reliably), with PDF-invoice.Question 2: Can I share the purchased PDF of GB/T 14048.5-2017_English with my colleagues?Answer: Yes. 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