实验表明，该后备保护装置具有很高的可靠性和经济性。
The equipment is shown to have reliability and economical efficiency.
后备保护装置后备保护装置是在其他保护装置动作失败或发生故障时动作的保护装置。
Backup protection Backup protection consists of protective devices, which are intended to operate only after other protective devices have failed to operate or detect a fault.
对于后备保护装置防止高阻抗接地故障，将配置一只双极方向过电流继电器，同瞬时跳闸附件的时间成反比。
For backup protection against high resistive ground faults, there will be a dual polarized directional overcurrent relay, inverse time with instantaneous trip attachment.
对于后备保护装置防止高阻抗接地故障，将配置一只双极方向过电流继电器，同瞬时跳闸附件的时间成反比。
For backup protection against high resistive ground faults, there will be a dual polarized directional overcurrent relay, inverse time with instantaneous trip attachment.
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