IEEE device numbers and functions for switchgear apparatus
开关装置的IEEE元件代码及功能
(Relay symbols and device numbers; selection from IEC 617-,IEEE C37.2-1991 and IEEE C37.2-1979)
The devices in switching equipments are referred to by numbers, with appropriate suffix letters when necessary, according to the functions they perform. 开关装置中的这些元件以代码及根据完成的功能所需的合适下标字母予以分类。These numbers are based on a system adopted as standard for automatic switchgear by IEEE, and incorporated in American Standard C37.2-1979. This system is used in connection diagrams, in instruction books, and in specifications.
这些代码以服务于自动开关装置的系统为标准，该系统被IEEE，包括美国标准C37.2-1979认证。这些系统在联系图，指令书籍和说明书中使用。
Device number 元件代码Definition and function
定义和功能
Note
备注
1 Master element is the initiating device, such as a control switch, voltage relay, float switch etc., that serves
either directly, or through such permissive devices as protective and time-delay relays, to place equipment
in or out of operation.
主要元件，是指控制开关、电压继电器、浮动开关等起动元件。它用于直接地通过保护继电器、延
时继电器等中间元件，使设备投入或撤出运行。
注：本编号通常用于手动操作的
元件，若某一电气或机务元件无
其它功能编号可表示则也可使用
本编号。
2 Time-delay starting or closing relay is a device that functions to give a desired amount of time delay before or after any point of operation in a switching sequence or protective relay system, except as specifically provided by device functions 48, 62 and 79 described later.
延时起动或闭合继电器，其功能是在开关顺序或保护装置系统任意操作点前后给予设定时间的延迟，不包括类似于提供特别功能后面描述的48,62和79元件。
3 Checking or interlocking relay is a device that operates in response to the position of a number of other devices, (or to a number of predetermined conditions), in an equipment to allow an operating sequence to proceed, to stop, or to provide a check of the position of these devices or of these conditions for any purpose.
校验或联锁继电器，在装置中，反映其它元件的工作位置(或一些预定条件的元件)，可用来确定一个工作程序是否继续进行，或停止或对一些元件的工作位置和一些预定条件进行校验。
4 Master contactor is a device, generally controlled by device No. 1 or equivalent, and the required permissive and protective devices, that serve to make and break the necessary control circuits to place equipment into operation under the desired conditions and to take it out of operation under other or abnormal conditions.
主接触器是一种由元件1及其相当的元件、中间继电器、保护元件等控制的元件。其工作是接通或断开必要的控制回路，以便在规定条件下使设备投入运行，或在其它条件和异常条件下，使之退出运行。
5 Stopping device is a control device used primarily to shut down an equipment and hold it out of operation.
[This device may be manually or electrically actuated, but excludes the function of electrical lockout (see device function 86) on abnormal conditions.]
停机元件是一种控制元件，主要用来使一台设备停止运转和退出运行。这一元件可手动或自动操作，但在发生异常情况时，它能闭锁电气功能(见元件86功能)
6 Starting circuit breaker is a device whose principal function is to connect a machine to its source of starting voltage. 启动断路器，其主要功能是在启动电压下将一台机器接入电源。
7 Rate-of-rise relay is a relay that functions on an excessive rate of rise of current.
阳极断路器是一种用于电力整流器阳极回路的断路器，其用途是当整流器出现逆弧时，遮断整流回路。
8 Control power disconnecting device is a disconnecting device,such as a knife switch, circuit breaker, or pull-out fuse block, used for the purpose of respectively connecting and disconnecting the source of control power to and from the control bus or equipment.
操作电源切断元件是一种隔离元件，如刀开关、断路器、或插入式熔丝等。用于将控制母线或设备与操作电源接通或断开。(操作电源中包括供给小型电机、加热器等设备的辅助电源。)
9 Reversing device is used for the purpose of reversing a machine field or for performing any other reversing functions.
反向元件用于实现电机磁场的反向或完成其它任何反向功能。
10 Unit sequence switch is used to change the sequence in which units may be placed in and out of service in multiple-unit equipment. 单元顺序开关用于变换顺序，使各个单元从多元设备中投入或撤出工作。
11 Multifunction device is a device that performs three or more comparatively important functions that could
only be designated by combining several of these device function numbers. All of the functions performed
by device 11 shall be defined in the drawing legend or device function list.
多功能元件。可完成3 个或以上比较重要的功能，而这些功能只能由多个功能元件组合完成。该元
件所有能完成的功能应在图纸、元件功能定义清单或继电器整定单中说明。
注：如果元件仅具有2 个功能，
则以这两个功能的编号表示
12 Over-speed device is usually a direct connected speed switch that functions on machine over-speed. 超速元件通常是直接连接的速度开关，当电机超速时动作。
