BS EN IEC 60077-5:2019

What is BS EN IEC 60077‑5 - Railway applications about?  

BS EN IEC 60077 is a series of international standards on railway vehicles that specifies the rules for HV fuses. 

BS EN IEC 60077‑5 is the fifth part of the BS EN IEC 60077 series of documents that give additional or amended rules for high voltage (HV) fuses as a supplement to those given by IEC 60077-2. 

The high voltage fuses concerned are those connected to power and/or auxiliary circuits. 

The nominal voltage of these circuits lies between 600 V DC and 3 000 V DC, according to IEC 60850. These fuses can also be used in auxiliary AC circuits up to a nominal voltage of 1 500 V. 

BS EN IEC 60077‑5 states specifically: 

• The characteristics of the fuses 
• The service conditions with which the fuses comply with reference to operation and behaviour in normal service, operation and behaviour in case of short circuit, dielectric properties. 
• The tests intended for confirming the compliance of the fuse with the characteristics under the service conditions and the methods adopted for these tests 
• The information marked on or given with, the fuse. 

NOTE: BS EN IEC 60077‑5 does not cover parallel connection of fuses. 

Who is BS EN IEC 60077‑5 - Railway applications for? 

BS EN IEC 60077‑5 on HV fuses is useful for: 

• Power converter manufacturers 
• Manufacturers of HV fuses 
• Railway engineers 
• Electrical engineers 
• Traction propulsion equipment manufacturers 

Why should you use BS EN IEC 60077‑5 - Railway applications?  

Railway fuses for rolling stock equipment are suited to protect against short circuit and overload faults in converters, heating, air conditioning and lighting systems. 

HV fuse is a device that, by the fusing of one or more of its specifically designed and proportioned 

components, opens the circuit in which it is inserted by breaking the current when this exceeds a given value for a sufficient time. BS EN IEC 60077‑5 gives the classification of fuse-links used for the protection of semiconductor devices, motors, etc. 

Product information that includes component documentation and marking of data or identification of the fuse-links and fuse-bases is given in BS EN IEC 60077‑5. 

Constructional and performance requirements are included in BS EN IEC 60077‑5, this could help you deliver operational performance capability and verification of breaking capacity of HV fuses. 

Moreover, BS EN IEC 60077‑5 navigates you through the designing and manufacturing HV fuses for railway rolling stock to protect electric traction rolling stock equipment to ensure the electrical safety while railway installations and high voltage switchgear. In this manner, you can achieve long service records for the operation and maintenance of the electric lines. 

What’s changed since the last update?  

BS EN IEC 60077‑5:2019 supersedes BS EN 60077‑5:2003. BS EN IEC 60077‑5:2019 includes some technical changes with respect to BS EN 60077‑5:2003. These include: 

• Test method of test duty III for verification of breaking capacity is reviewed.