定价： 664元

定价： 216元

定价： 612元

定价： 149元 / 折扣价： 127 元

This standard covers means of improved safeguarding of personnel while operating or maintaining equipment located in electrolytic cell line working zones. Included are related requirements for equipment and electrical conductor installations. The general types of electrolytic cells covered include, but are not limited to, the direct current (dc) cells used in the production of aluminum, cadmium, sodium chlorate, chlorine, copper, fluorine, hydrogen peroxide, magnesium, sodium, and zinc. This standard does not cover the following: -Any electrical equipment that is neither part of the electrolytic process equipment nor installed or used in the cell line working zone -Electroplating and anodizing facilities -AC cells or furnaces -Electrothermal process furnaces -Arc furnaces -Melting or heat treating facilities -Cells for hydrogen production -Cells used as a source of electric energy

定价： 58元 / 折扣价： 50 元

This standard establishes criteria for design analysis for qualification, quality, and reliability of rechargeable battery systems for multi-cell mobile computing devices. It also provides methods for quantifying the operational performance of these batteries and their associated management and control systems including considerations for end-user notification. This standard covers rechargeable battery systems for mobile computing. The battery technologies covered are limited to Li-ion and Li-… read more ion polymer, but future versions of this standard may include technologies that are not in general use at present. Also included are: battery pack electrical and mechanical construction; system, pack, and cell level charge and discharge controls; and battery status communications. The following are addressed: qualification process; manufacturing process control; energy capacity and demand management; levels of management and control in the battery systems; current and planned lithium-based battery chemistries, packaging technologies, and considerations for end-user notification. read less

定价： 153元 / 折扣价： 131 元

Th s standard covers means of safeguarding personnel while operating equipment located in electrolytic cell line working zones. Included are related requirements for equipment and electrical conductor installations. The general types of dc electrolytic cells covered include, but are not limited to, the cells used in the production of aluminum, cadmium, chlorate, chlorine, copper, fluorine, hydrogen peroxide, magnesium, sodium, and zinc. This standard does not cover: (1) Electroplating and… read more anodizing facilities (2) AC cells or furnaces (3) Electrotherremal process furnaces (4) Arc furnaces (5) Melting or heat treating facilities (6) A n y electrical equipment that is neither part of the electrolytic process equipment nor installed or used in the cell line working zone Items referred to in (6) are not covered by this standard and shall be installed in accordance with NFPA 70-1975, National Electrical Code ( ANSI Cl-1975), or the latest revision thereof read less

定价： 56元 / 折扣价： 48 元