CAJ | 학술논문

介绍了一种低压三相电动机多功能保护装置的研制过程。重点叙述了保护装置的总体结构和工作原理，给出了电流/电压输入电路、开关量输入电路、开关量输出电路、通信接口电路的设计方案。并分析了启动超时保护、堵转保护、电流不平衡保护和过热保护的工作原理，给出了保护装置的硬件配置图和典型应用电路图。该保护装置集保护、测量、控制、通信为一体，具有功能完善、高性价比、高可靠性的特点，可以对低压三相电动机所产生的各种故障进行全面的保护，提高电动机的使用率，延长电动机的使用寿命。
개소료일충저압삼상전동궤다공능보호장치적연제과정。중점서술료보호장치적총체결구화공작원리，급출료전류/전압수입전로、개관량수입전로、개관량수출전로、통신접구전로적설계방안。병분석료계동초시보호、도전보호、전류불평형보호화과열보호적공작원리，급출료보호장치적경건배치도화전형응용전로도。해보호장치집보호、측량、공제、통신위일체，구유공능완선、고성개비、고가고성적특점，가이대저압삼상전동궤소산생적각충고장진행전면적보호，제고전동궤적사용솔，연장전동궤적사용수명。
The development of multifunctional protection device for the low-voltage three-phase motor is introduced. The overall structure and the operating principle are discussed and the schematic diagrams of current/voltage input circuit, switch signal input, switch signal output, and communication interface are given. This paper analyzes the operating principle of start-up out-time protection, locked rotor protection, unbalanced current protection and overheating protection, and also introduces the hardware configuration and the typical application circuit. The protection device combines with protection, measurement, control and communication, which has the features of perfect function, cost-effective and high reliability. It can provide full protection for the various faults of the low-voltage three-phase motor, and improve the utilization and extend the service life of the motor.