# Is it possible to connect two different transformers in parallel

**URL:** <https://forumautomation.com/t/is-it-possible-to-connect-two-different-transformers-in-parallel/9805>\
**Category:** Electrical\
**Tags:** transformer\
**Created:** [August 31, 2021, 5:05am UTC](https://forumautomation.com/t/is-it-possible-to-connect-two-different-transformers-in-parallel/9805 "2021-08-31T05:05:09Z")\
**Posts on this page:** 3\
**Page:** 1

<div class="post-metadata">

**Author:** ![instrumentationtechi](https://forumautomation.com/letter_avatar_proxy/v4/letter/i/50afbb/32.png) [@instrumentationtechi](https://forumautomation.com/u/instrumentationtechi)\
**Post date:** [August 31, 2021, 5:05am UTC](https://forumautomation.com/t/is-it-possible-to-connect-two-different-transformers-in-parallel/9805/1 "2021-08-31T05:05:09Z")

</div>

Can we connect two different transformers in parallel with the same voltage at their load and secondary side

---

<div class="post-metadata">

**Author:** ![ashlin](https://forumautomation.com/user_avatar/forumautomation.com/ashlin/32/3775_2.png) [@ashlin](https://forumautomation.com/u/ashlin)\
**Post date:** [August 31, 2021, 5:11am UTC](https://forumautomation.com/t/is-it-possible-to-connect-two-different-transformers-in-parallel/9805/2 "2021-08-31T05:11:24Z")

</div>

You can only connect transformers in parallel with the

Same voltage rating

Same current ratings

Same frequency

Same Polarity

same coefficient.

Same impedance

Same vector group

---

<div class="post-metadata">

**Author:** ![Rabert](https://forumautomation.com/user_avatar/forumautomation.com/rabert/32/6784_2.png) [@Rabert](https://forumautomation.com/u/Rabert)\
**Post date:** [September 28, 2026, 7:47am UTC](https://forumautomation.com/t/is-it-possible-to-connect-two-different-transformers-in-parallel/9805/3 "2026-09-28T07:47:55Z")

</div>

> [@instrumentationtechi](#):
>
> Can we connect two different transformers in parallel with the same voltage at their load and secondary side

Yes, **two different transformers can be connected in parallel** , but matching the secondary voltage alone is **not sufficient**.

They should have compatible:

- Same voltage ratio and polarity
- Same phase sequence and vector group
- Similar percentage impedance and X/R ratio
- Same frequency
- Compatible kVA ratings

Otherwise, **circulating currents, unequal load sharing or transformer damage** can occur.