This standard specifies the general basic requirements for low-voltage electromechanical contactors and motor starters, including characteristics, working status, performance, and tests and test methods to verify that the electrical appliances meet these requirements. It also specifies the parameters that should be marked on the electrical appliances or the manufacturer should. data provided, as well as packaging, shipping and storage requirements. This standard is applicable to contactors and starters with main contact rated voltage AC 50Hz, 1140V (1200V) and below, DC 1500V (1650V) and below specified in Article 1.1. Mainly include: AC and DC contactors AC and DC contactors are used to make and break circuits, and combined with appropriate thermal overload relays to protect circuits that may be overloaded during operation (running). This standard also applies to special contacts for contactor coil circuits.
GB 14048.4-1993 history
2020GB/T 14048.4-2020 Low-voltage switchgear and controlgear—Part 4-1: Contactors and motor-starters—Electromechanical contactors and motor-starters (Including motor protector)
2010GB 14048.4-2010 Low-voltage switchgear and controlgear.Part 4-1:Contactors and motor-starters.Electromechanical contactors and motor-starters (Including motor protector)
2003GB 14048.4-2003 Low-voltage switchgear and controlgear-Electromechanical contactors and motor-starters
1993GB 14048.4-1993 Low-voltage switchgear and controlgear. Low-voltage electromechanical contactors and motor starters