定价：

定价：

定价： 无文本

定价： 无文本

定价：

定价： 无文本

定价： 无文本

定价： 无文本

定价：

定价：

定价：

This standard specifies a communication layer, Flexible Optical Service Unit (OSUFlex), to provide small service channels in optical transport networks. The main features of the OSUFlex communication layer are providing massive OSUflex connections to directly carry power services (e.g., E1 or IEEE Std C37.94) into the optical transport network, enabling the flexible bandwidth (e.g., n ×2 Mbit/s) and hitless bandwidth adjustment for each OSUflex connection, directly mapping of service into… read more OSUflex with the capabilities of high bandwidth efficiency, low latency, low latency jitter, and high-precision clock synchronization for power system applications. read less

定价： 84元 / 折扣价： 72 元

This guide provides recommendations for the in-service visual inspection, application, care, maintenance, and electrical and mechanical testing of insulating flexible slings, including core, insulating sheath, and attachments for use during live line work on voltages up to 1000 kV alternating current (AC) and ±800 kV direct current (DC). Testing pertains only to electrical and mechanical tests that may be performed periodically to check if there is any reduction in the electrical performance,… read more mechanical performance, and both (combined) electrical and mechanical performance of the insulating flexible sling. read less

定价： 56元 / 折扣价： 48 元

定价： 无文本

定价： 无文本