[RE-wrenches] Trace T220

[Allan Sindelar]

Ron,
Shooting from memory here... the T220 was rated at 2800 watts max, as 
compared to the later T240, which is rated at 3900 watts continuous. At 
240 VAC 2800W is just a bit over 10A. Given that use as a balancing 
autotransformer for a generator is continuous duty, this capacity rating 
is most likely due to how much heat it can tolerate. Given this the 15A 
fusing seems quite appropriate and I wouldn't change it.
Allan

*Allan Sindelar*
allan at sindelarsolar.com <mailto:allan at sindelarsolar.com>
NABCEP Certified PV Installation Professional
NABCEP Certified Technical Sales Professional
New Mexico EE98J Journeyman Electrician
Founder (Retired), Positive Energy, Inc.
*505 780-2738 cell*

**

On 10/25/2016 5:53 PM, RM You wrote:
> Hi Wrenches, looking for help from someone who remembers the old T220 Autotransformer from Trace. I have a used one and it came with built in 15a fuses which seem small. I’m wondering if the size of the transformer actually changed with the T240 subsequent version or if the 25a breakers in the T240 were just considered a more acceptable design component for the time. Bottom line is would it be advisable to change out the built in 15a for a higher rating to use this as a balancing transformer on 240v output from a generator.
>
> Ron
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