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1、专业外语南京工程学院电力系 蒋志平2006年2月英译中英译中中译英中译英词汇词汇Application Breaker pole position discordance can occur on the operation of a breaker with independent operating gears for the three poles. The reason may be an interruption in the closing or trip coil circuit, or a mechanical failure resulting in a stuck (卡住的
2、，不能动 的) breaker pole. A pole discordance can be tolerated for a limited time, for instance during a single-phase trip -reclose cycle. The pole discordance function detects a breaker pole discordancy not generated by auto- reclose cycle and issues a trip signal for the circuit breaker. 1. Pole discor
3、dance protection (PD)三相不一致保护（PD） 应用在操作有三相独立操作机构的断路器时， 可能会发生断路器位置不一致的情况，可 能是由于跳闸线圈回路断线，或是由于机 械原因使断路器某一极被卡住。三相不一 致可以容许在有限的时间内，例如在单相 跳合闸周期内。三相不一致功能检测自动 重合闸周期之外产生的断路器三相不一致 ，并向断路器发出跳闸信号。Functionality The operation of the pole discordance logic, PD, it based on checking the position of the breaker auxilia
4、ry contacts. Three parallel normally open contacts in series with three normally closed contacts in parallel of the respective breaker poles form a condition of pole discordance, connected to a binary dedicated for the purpose. In addition, there is an automatic detection criterion based on comparis
5、on of currents in the breaker poles. This function is enabled for just a few seconds after close or trip commands to the breaker in order to avoid unwanted operation in unsymmetrical load conditions. 1. Pole discordance protection (PD)三相不一致保护（PD）功能特性三相不一致逻辑PD动作基于检查断路器的 辅接点位置，由断路器每相的三个常开并 辅接点与三个常闭并辅接
6、点串联构成三相 不一致检查条件，然后与专用的开关量输 入回路相连。另外，有一个自动检测断路器电流的电路 ，该功能在合闸或跳闸几秒钟后投入，以 避免不对称负荷时造成非预期的操作。2. Breaker failure protectionApplicationIn many protection applications local redundancy (冗 余) is used. One part of the fault clearance system is however never duplicated, namely the circuit breaker. Therefore a
7、breaker failure protection can be used.The breaker failure protection is initiated by trip signals from different protection functions within or outside the protection terminal. When a trip signal is sent to the breaker failure protection fist, with no or a very short delay, a re-trip signal can be
8、sent to the protected breaker. If fault current is flowing through the breaker still after a setting time a back-up trip signal is sent to the adjacent breakers. This will ensure fault clearance also if the circuit breaker is out of order.断路器失灵保护（BFP） 应用在有多个保护时，采用就地冗余，但是却有一部 分故障消除系统从不双重化，即断路器，因此要 使用
9、断路器失灵保护。断路器失灵保护由保护终端内外不同保护功能的 跳闸信号起动。当跳闸信号送到断路器失灵保护 时，先不经延时或经很短的延时向保护断路器发 重跳信号。如果经一整定时间后断路器仍流过故 障电流，则向相邻的断路器发一个后备跳闸信号 ，这样即使断路器故障时也能保证清除故障。 2. Breaker failure protectionDesignThe breaker failure protection function is initiated by the trip commands from protection functions placed either inside the s
10、ame terminal or externally, by connection to appropriate binary inputs. A dedicated input is available for general starting.Three separate functional inputs are also available for single-phase starting.The operate value of the phase segregated current measuring elements is settable within a wide ran
11、ge. Three independent timers t2 are available for phase segregated breaker failure detection. 断路器失灵保护（BFP）设计断路器失灵保护功能由同一终端内的保护 装置或通过适当的开关量输入装置的外部 保护装置的跳闸命令起动。可以有三个独 立的功能输入用于单相起动，也有一个专 门的输入用于三相起动。分相电流测量元件的动作值可以在很宽的 范围内设定，对分相断路器失灵检测，可 以有三个独立的定时器t2。 2. Breaker failure protectionAn additional timer t1 f
12、or retrip command is available. Dedicated setting allows to enable or disable the retrip or to perform it by current check or not. Retrip to the faulty circuit breaker can be issued single phase or three phases.Special adaptive algorithm (ASD), together with RMS measurement, allow a fast resetting t
13、ime of the current measuring elements. The current measurement is stabilized against transients which can cause unwanted operation with saturated current transformers. 断路器失灵保护（BFP）重跳命令需要带一个附加的延时t1。有一个专用 的整定值用于开放或不开放重跳闸，或确定进行 重跳或者是否将经过电流检测。重跳故障断路器 可以发单相跳令或三相跳令。特殊的自适应算法（ASD-）同RMS有效值测量一 道使用，可快速复归电流测量元件
14、的时间，电流 测量元件可对由于电流互感器饱和可能会引起误 动作的暂态过程进行制动。 3. Distance protection (ZM) ApplicationThe ZM distance protection function provides fast and reliable protection for overhead lines and power cables in all kinds of power networks. For each independent distance protection zone, full scheme design provides co
15、ntinuous measurement of impedance separately in three independent phase-to-phase measuring loops as well as in three independent phase-to-earth measuring loops.Phase-to-phase distance protection is suitable as a basic protection function against two- and three-phases faults in all kinds of networks,
16、 regardless of the treatment of the neutral point. Independent setting of the reach in the reactive and the resistive direction for each zone separately, makes it possible to create fast and selective short circuit protection in power systems. 距离保护（ZM） ZM距离保护功能对各种电网中的架空线路及电力 电缆提供快速、可靠的保护。对每一独立的距离 段，全方案设计对三个独立的相相测量回路及3 个独立的相地测量回路分别提供连续测量。相相距离保护适于不考虑中性点处理方式的名 种电网中，作为两相故障、三相故障的基本保护 功能。对每一段分别在电抗、电阻方向上的独立 整定使其作
