GB/T 14808-2001 in English

本标准适用于额定电压3.6kV及以上但不超过12kV，频率50Hz及以下电力系统使用的户内安装的交流接触器和/或基于接触器的电动机起动器。本标准仅适用于三相系统中的三极接触器和起动器，以及用于单相系统中的单极接触器和起动器。用于单相系统中的两极接触器和起动器应由制造厂和用户协商。本标准涉及的接触器和/或起动器一般不用于开断短路电流，因此，适当的短路保护（见3.4.110.12和下面的注2）可以是装置的一部分，但未必成为接触器或发动器的一部分。本标准对下列装置提出要求：——与过载和/或短路保护装置（SCPD）有关的接触器；——与单独的短路保护装置和/或单独的短路以及与其成为一体的过载保护装置有关的起动器；——根据规定的条件，与本身的短路保护装置组合在一起的接触器或起动器。这些组合电器，例如综合起动器（见3.4.110.9），被看作是一个整体。本标准涉及到用于合、分电路的接触器，以及，如果与合适的继电器（见3.6.108）组合，保护线路可能出现的过负载的接触器。本标准也适用于接触器的操作装置及其辅助设备。本标准涉及到用来起动电动机并将其加速至正常速度、保证电动机连续运行、切断电动机电源为电动机及其连接的回路的过负载提供保护的电动机起动器。电动机起动器的类型包括：——直接起动器——反转起动器——双向起动器——降低电压起动器——自耦减压起动器——变阻起动器——电抗起动器动作取决于符合GB/T 14598.15的用来保护电动机的热继电器，或符合GB 13232的电动机装有的热保护装置的起动器不需要满足本标准的相关要求。起动器的过载继电器，包括那些基于固态技术的过载继电器包含在本标准的范围内。本标准不适用于：——基于断路器的电动机起动器；——多极接触器或起动器的单极运行；——涉及用于在起动位置连续运行的双级自耦减压起动器；——非对称变阻转子起动器，即所有相的电阻值均不相同的起动器；——即可起动又可调整速度的设备；——液态起动器和“液态-蒸汽”起动器；——半导体接触器和在主回路中使用半导体接触器的起动器；——变阻定子起动器；——特殊用途的接触器或起动器。本标准不涉及装在接触器和基于接触器的起动器内的件，因为它们有各自的技术要求。本标准的目的是为了规定：a) 接触器、起动器和相关设备的特性；b) 接触器、起动器应遵循的有关条件；——操作和特性；——绝缘性能；——适用时，外壳的防护等级；——结构；——对于综合起动器，各件之间的相互作用，例如与SCPD的配合。C) 用于确认这些条件已经满足的试验，以及这些试验所采用的方法；d) 随机文件或制造厂的文件应表明的资料。

Scope

This standard applies to indoor-installed AC contactors and/or contactor-based motor starters used in power systems with a rated voltage of 3.6 kV and above but not exceeding 12 kV, and a frequency of 50 Hz and below. This standard applies only to three-pole contactors and starters in three-phase systems, and to single-pole contactors and starters in single-phase systems. Two-pole contactors and starters used in single-phase systems should be negotiated between the manufacturer and the user. The contactors and/or starters covered by this standard are generally not intended for breaking short-circuit currents, therefore, suitable short-circuit protection (see 3.4.110.12 and Note 2 below) may be part of the device but not necessarily a contactor or starter a part of. This standard provides requirements for the following devices: - contactors associated with overload and/or short-circuit protective devices (SCPD); - contactors associated with separate short-circuit protective devices and/or single short-circuit and overload protective devices integrated starters; - contactors or starters combined with their own short-circuit protective devices according to the specified conditions. These combination appliances, such as combined starters (see 3.4.110.9), are considered as a whole. This standard deals with contactors for closing and opening circuits and, if combined with suitable relays (see 3.6.108), contactors for protection against possible circuit overloads. This standard also applies to the operating device of the contactor and its auxiliary equipment. This standard covers motor starters used to start a motor and accelerate it to normal speed, to ensure continuous operation of the motor, to cut off the power supply to the motor, and to protect the motor and its connected circuits against overload. Types of motor starters include: - Direct starters - Reversing starters - Two-way starters - Reduced voltage starters - Auto-decompression starters - Rheostat starters - Reactance starters Action depends on Thermal relays used to protect motors in compliance with GB/T 14598.15, or starters equipped with thermal protection devices for motors in compliance with GB 13232 do not need to meet the relevant requirements of this standard.