BS EN IEC 60709:2019

What is BS EN IEC 60709- Nuclear power plants about?

BS EN IEC 60709 is applicable to nuclear power plant instrumentation and control (I&C) and electrical systems and equipment, whose functions are required to be independent due to their contribution to:

• A redundant or diverse safety group
• Different defence in depth levels
• Different safety classes and also with non-classified (NC) systems

BS EN IEC 60709 is also applicable to temporary installations which are part of those I&C and electrical systems important to safety. Clause 7 is intended particularly for electrical isolation; Clause 8 is intended particularly for the cabling and the arrangement of equipment of I&C and electrical systems important to safety.

Who is BS EN IEC 60709 - Nuclear power plants for?

BS EN IEC 60709 on nuclear power plants is applicable to:

• Nuclear power plants
• Atomic research organizations
• Nuclear power plants electrical systems and equipment manufacturers
• Nuclear power safety regulatory authorities

Why should you use BS EN IEC 60709- Nuclear power plants?

Instrumentation and control (I&C) and electrical systems in nuclear power plants are important to safety in nuclear power plants and need to tolerate the effects of plant / equipment faults as well as internal and external hazards.

By following the guidelines in BS EN IEC 60709 for instrumentation and control (I&C) and electrical systems and equipment will help you in modernization existing nuclear power plants. Be assured of safety in nuclear power plants by applying the BS EN IEC 60709 guidelines on separation design basis, including inputs, and identifying a certain number of possible causes of internal and external hazards.

BS EN IEC 60709 provides you with the electrical isolation measures for I&C and electrical systems important to safety and also requirements referring isolation devices.

BS EN IEC 60709 aids in requirements to be fulfilled for cabling and component separation within an I&C and electrical system important to safety.

What’s changed since the last update?

BS EN IEC 60709:2019 supersedes BS EN 60974‑3:2014, which is withdrawn.

BS EN IEC 60709:2019 includes some technical changes with respect to BS EN 60974‑3:2014. These include:

• Changes induced by the publication of IEC 60974-1:2017
• Reference to IEC 60974-1:2017/AMD1:2019 in Clause 2
• Figure 2 is updated where a subtraction of the proportion of the no-load voltage is shown
• Requirement for the safe operation of the arc striking and stabilizing devices in the event of failure, in 11.5
• Requirements for the rating plate as in IEC 60974-1:2017, Clause 15