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实用新型
CN201774231U 适用于客运专线的电气化铁道主变后备保护装置 失效 - 权利终止

适用于客运专线的电气化铁道主变后备保护装置
摘要：
本实用新型提供了适用于客运专线的电气化铁道主变后备保护装置，主要由包括有高压侧三相过电流模块、低压侧α相过电流模块、低压侧β相过电流模块、零序过电流模块、零序过电压模块、反时限过负荷模块、低压侧过电压模块、27.5kV侧PT断线检测模块的保护插件，以及分别与保护插件相连的交流插件、信号插件、出口插件及电源插件组成。本实用新型将非电量保护纳入后备保护装置，保证主变压气内部故障时有独立的双重保护。
摘要（英）：

The utility model provides a main transformer backup protection device for electric railway of passenger dedicated line, mainly comprising a three-phase over-current module of high voltage side, an alpha-phase over-current module of low voltage side, a beta-phase over-current module of low voltage side, a zero sequence over-current module, a zero sequence over-voltage module, an inverse time-lag overload module, an over-voltage module of low voltage side, a protection insert for PT disconnection detection module of 27.5 kV side, and an alternating insert, a signal insert, an outlet insert and a power insert which are respectively connected to the protection insert. The main transformer backup protection device for electric railway of passenger dedicated line provided by the utility model has the advantages that the non-electric quantity protection is brought into the backup protection device and the independent dual protection when the interior of main transformer is faulted is ensured.

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