定价：

This guide provides recommendations for the in-service visual inspection, application, care, maintenance, and electrical and mechanical testing of insulating flexible sling, including core, attachments, insulating sheath, 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 preventive electrical and mechanical tests that may be performed periodically to check if there is any reduction in the electrical… read more performance, mechanical performance, and both electrical and mechanical performance of the insulating flexible sling. read less

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 C37.94) into an optical transport network, enabling the flexible bandwidth (e.g. n × 2 Mb/s) and hitless bandwidth adjustment for each OSUflex connection, direct mapping of services into OSUflex with… read more the capabilities of high-bandwidth efficiency, low latency, low latency jitter and high-precision clock synchronization for power system applications. read less

定价： 78元 / 折扣价： 67 元

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定价：