1. Scope 1.1 This Standard sets forth methods of electrical coordination between pipelines and alternating current (ac) supply lines having line-to-ground voltages greater than 35 kV, simultaneously or separately installed as follows: (a) a pipeline

定价： 501元 / 折扣价： 426 元

定价： 501元 / 折扣价： 426 元

This PDF includes Update No. 2 and Update No. 3 1. Scope 1.1 This Standard applies to devices that automatically reduce the initial pressure to a set lower pressure in water systems and are self-acting spring-operated devices. It applies to devices

定价： 364元 / 折扣价： 310 元

CSA Preface This is the first edition of CAN/CSA-C61000-2-12, Electromagnetic compatibility (EMC) - Part 2-12: Environment - Compatibility levels for low-frequency conducted disturbances and signalling in public medium-voltage power supply systems, whi

定价： 1001元 / 折扣价： 851 元

CSA Preface This is the second edition of CAN/CSA-C61000-2-2, Electromagnetic compatibility (EMC) - Part 2-2: Environment - Compatibility levels for low-frequency conducted disturbances and signalling in public low-voltage power supply systems, which i

定价： 1001元 / 折扣价： 851 元

1 Scope and object This part of IEC 61000 is concerned with the emission of voltage changes, voltage fluctuations and flicker produced by equipment and impressed on the public low-voltage supply system. It specifies the limits of voltage changes produc

定价： 683元 / 折扣价： 581 元

CSA Preface This is the first edition of CAN/CSA-C61000-3-3, Electromagnetic compatibility (EMC) - Part 3-3: Limits - Limitation of voltage changes, voltage fluctuations and flicker in public low-voltage supply systems, for equipment with rated current

定价： 1092元 / 折扣价： 929 元

This PDF includes GI #2. 1. Scope 1.1 This Standard applies to the following products rated at 600 V and less, and designed to be used in nonhazardous locations in accordance with the Rules of the Canadian Electrical Code, Part I: (a) cord sets and

定价： 819元 / 折扣价： 697 元

定价： 1274元 / 折扣价： 1083 元

1. Scope 1.1 This Standard outlines the principles and general practices of electrical protection applicable to overhead supply systems operating at more than 750 V but less than 50 kV phase to phase and communications systems, where the lines of th

定价： 592元 / 折扣价： 504 元

定价： 1229元 / 折扣价： 1045 元

定价： 3322元 / 折扣价： 2824 元

1.1 Scope 1.1.1 This standard applies to newly produced automatic gas shutoff valves and devices constructed entirely of new, unused parts and materials. 1.1.2 An automatic gas shutoff device shall operate when the temperature sensing element is

定价： 1183元 / 折扣价： 1006 元

Scope Details test and examination criteria for automatic gas shutoff valves and devices which operate when the temperature sensing element is at 210oF (99oC) or less

定价： 546元 / 折扣价： 465 元

Scope Datails test and examination criteria for automatic gas shutoff valves and devices which operate when the temperature sensing element is at 210oF (99oC) or less.

定价： 683元 / 折扣价： 581 元