Breaking News
Home » Questions/Answers (Electrical) » What is the normal or average life expectancy of a Transformer ?

What is the normal or average life expectancy of a Transformer ?

When a Transformer is operated under ANSI / IEEE basic loading conditions (ANSI C57.96), its normal life
expectancy is about 20 years. The ANSI / IEEE basic loading conditions for Transformer are:

i. The Transformer is continuously loaded at rated kVA (kilo Volt Ampere) and rated Voltages (Transformer must be operated at the rated Voltage and kVA)

ii. The average temperature of the ambient air during any 24-hour period is equal to 30°C (86 °F) and at no time exceeds 40°C (104 °F).

iii. The height where the transformer is installed,
does not above 3300 feet  or 1000 meters.

From Schematic Drawing to PCB Production, Just Need One Tool
Cheap PCB Prototype: 10 pcs 2 layers only $10, quick delivery, 100% E-test.

About Electrical Technology

All about Electrical & Electronics Engineering & Technology. Follow , Facebook , Twitter , Instagram , Pinterest & Linkedin to get the latest updates or subscribe Here to get latest Engineering Articles in your mailbox. Also, Follow

Check Also

What is Industrial Automation

What is Industrial Automation | Types of Industrial Automation

What is Industrial Automation, Their Types and Hierarchy of an Industrial Automation System Today’s highly …


  1. is only these three is everthing given in ansi c56.96?

  2. Dear Sir,

    I am working as a electrical engineer at Qatar.I would like to know about the 11 KV/2500 KVA transformer life expectancy calculation formula.

    Waiting for your favorable reply

    Thanks & Regards,
    Xavier A

  3. Tor-ue Buadum

    I am Engineer Tor-ue, working in Nigeria. pls i need the formular for the calculation of life expectant of a transformer

  4. Tor-ue Buadum

    i need the formula for calculating transformer life expectancy ratio.

Leave a Reply

Your email address will not be published. Required fields are marked *