BS EN IEC 60255-181:2019

What is BS EN IEC 60255-181‒ Requirements for frequency protection about?  

BS EN IEC 60255-181 is a part of the multi-series standard that covers measuring relays and protection equipment.  

BS EN IEC 60255-181 specifies the minimum requirements for functional and performance evaluation of frequency protection. It defines a procedure to explain the documentation and publishing of the performance test results. 

BS EN IEC 60255-181 covers the functions based on frequency measurement or rate of change of frequency measurements and frequency protection where additional blocking elements are used. 

BS EN IEC 60255-181 defines the influencing factors that affect the accuracy under steady-state conditions and performance characteristics during dynamic conditions. It includes the test methodologies for verifying performance characteristics and accuracy. 

Note 1: BS EN IEC 60255-181 does not cover synchronizing or synchronism-check functions. 

Note 2: BS EN IEC 60255-181 does not specify the functional description of additional features often associated with frequency functions such as under-voltage blocking, df/dt, or Δ f/Δ t supervision, current supervision, or power supervision (f/P function).  

Note 3: Frequency and rate of change of frequency measurement outputs provided by protection devices are not in the scope of BS EN IEC 60255-181. 

Who is BS EN IEC 60255-181‒ Requirements for frequency protection for?  

BS EN IEC 60255-181 on requirements for frequency protection is useful for: 

• Manufacturers of measuring relays 
• Manufacturers of frequency/ frequency monitoring relays 
• Suppliers, importers, and dealers of measuring relays and frequency 
• Test providers for measuring relays  

Why should you use BS EN IEC 60255-181‒ Requirements for frequency protection?  

Maintaining a consistent power system frequency is necessary as multiple frequencies cannot operate alongside each other without damaging equipment. It may have serious implications while providing electricity on a national scale.  

BS EN IEC 60255-181 specifies the minimum requirements for frequency protection of the measuring relays and guides you in using the appropriate performance specifications for meeting these minimum requirements.  

BS EN IEC 60255-181 demonstrates the procedure for documenting the minimum requirements, which is useful for the manufacturers or any user, showcasing a good idea for enhancing the class of their product.