FOREWORD This amendment has been prepared by IEC technical committee 72: Automatic controls for household use. AVANT-PROPOS Le présent amendement a ete etabli par le comite d.etudes 72 de la CEI: Commandes automatiques pour appareils domestiques.

定价： 410元 / 折扣价： 349 元

FOREWORD This amendment has been prepared by IEC technical committee 72: Automatic controls for household use. AVANT-PROPOS Le présent amendement a été établi par le comité d'études 72 de la CEI: Commandes automatiques pour appareils domestiques.

定价： 182元 / 折扣价： 155 元

定价： 819元 / 折扣价： 697 元

1. Scope This clause of Part 1 is replaced as follows: 1.1 In general, this standard applies to timers and time switches for household and similar use that may use electricity, gas, oil, solid fuel, solar thermal energy, etc. or a combination there

定价： 1001元 / 折扣价： 851 元

No Scope Available

定价： 273元 / 折扣价： 233 元

1. Scope and Object 1.1 Scope This standard is applicable to stationary or portable, single- phase or polyphase, air-cooled isolating and safety isolating transformers, associated or otherwise, having a rated supply voltage not exceeding 1000 V alt

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1. Scope 1.1 This Standard outlines the requirements for seismic instrumentation systems for nuclear power plants where site- specific seismic responses are required to be determined and recorded.

定价： 819元 / 折扣价： 697 元

1. Scope This standard covers ballasts, excluding resistance types, for use on a.c. supplies up to 1 000 V at 50 Hz or 60 Hz, associated with tubular fluorescent lamps with or without pre-heated cathodes operated with or without a starter or starting d

定价： 1456元 / 折扣价： 1238 元

1. Scope 1.1 This Standard covers the design, fabrication, qualification, installation, and inspection of CANDU nuclear power plant electrical and instrument air support power systems. These support power systems are part of the category of systems ca

定价： 910元 / 折扣价： 774 元

1. Scope This standard specifies safety requirements for ballasts for discharge lamps such as high-pressure mercury vapour, low- pressure sodium vapour, high-pressure sodium vapour and metal halide lamps. Section One specifies general requirements and

定价： 910元 / 折扣价： 774 元

1. Scope This standard specifies general and safety requirements for starting devices (starters and ignitors) for tubular fluorescent and other discharge lamps for use on a.c. supplies up to 1 000 V at 50 Hz or 60 Hz which produce starting pulses not g

定价： 910元 / 折扣价： 774 元

1. Scope This standard specifies general and safety requirements for electronic ballasts for use on a.c. supplies up to 1000 V at 50 Hz or 60 Hz with operating frequencies deviating from the supply frequency, associated with tubular fluorescent lamps a

定价： 1047元 / 折扣价： 890 元

1. Scope This standard specifies the safety and interchangeability requirements, together with the test methods and conditions, required to show compliance of tubular fluorescent and other gas-discharge lamps with integrated means for controlling start

定价： 1047元 / 折扣价： 890 元

定价： 1638元 / 折扣价： 1393 元

1 Scope and object This part of IEC 60871 is applicable to both capacitor units and capacitor banks intended to be used, particularly, for power-factor correction of a.c. power systems having a rated voltage above 1 000 V and frequencies of 15 Hz to 60

定价： 1274元 / 折扣价： 1083 元