英语翻译

题目

英语翻译
V.SOLID STATE BREAKER HARDWARE
An example of a solid state circuit breaker for a DC application is shown in Figures 13 and 14.This device is rated for 2000Vdc and 800Amps,and was designed to protect
a propulsion drive inverter connected to a DC supply.Many of these breakers and inverter loads were connected to a common DC feed bus.
The primary series switches Q1 and Q2 are based on two parallel pairs of 900A,4500V IGBT modules,one in each DC bus line.If a short circuit occurs the current will rise rapidly through these switches and when it reaches a predetermined trip level,both devices turn off simultaneously.The IGBT pairs and protection devices are selected such that either pair alone can interrupt the current safely.The input bus is clamped with overvoltage protection circuitry based on an RCD snubber (R1-R3,D1,D2 and C1) and MOV protection devices RV1and RV2.
Additional auxiliary function also provided include switches S1,S2 and resistors R5,R6 used for a

答案

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五 固态断路器 五金器具
固态断路器应用于直流的实例见图13和14.该设备的额定电流为2000Vdc和800Amps,其目的是为了保护逆变器的推进器连接到直流电源.这些断路器和逆变器负荷连接到一个共用的直流供给总线.
主要系列交换机Q1和Q2基于两块平行电子偶900A,4500V IGBT模块,各位于各条直流供给总线中.如果出现短路,电流将通过这些开关迅速上升.当它到达预定的访问级别,这两种设备同时关闭.IGBT电子偶与保护设备的选择依据各电子偶安全性地单独干扰电流.输入总线电压同基于RCD缓冲器（R1-R3,D1,D2与C1）与MOV保护设备RV1与RV2的超压保护电路固定.
额外辅助功能同时提供了包括开关S1,S2和用于预先充电的输出负载电阻R5、R6,用于输入隔离的可选二极管D3、D4,动态制动开关S3、S4,用于外部数据库电阻器的二极管D5,D6.控制感应电路提供电压和电流测量,控制信号,软件和硬件过压/过流保护功能和孤立通信接口.看似抽屉的单位进行水冷,尺寸为42 × 16.5 x7.5英寸,重量为二五零磅.
由于负载的低电感（某逆变器）和电路的延误,所有断路器需要30H电感来限制故障电流的di/dt,使得IGBT电流和电压的峰值内在SOA设备范围内.增加电感导致需求两阶段输入固定 - 一个用于初步峰值电压限制的RCD和一个散装固定的MOV.IGBT关闭时间也减少到约2秒,以限制电压过冲.