Utilities change service pole top transformers for various reasons.
1. The transformer is overloaded and a higher capacity VA transformer is needed.
2. The old transformer contained fluids that are no longer allowed in the utility industry and had to be replaced by a new transformer that in addition to having better internal oils, it has better specifications.
3. The line loading off that transformer was sagging and a new/better transformer is needed.
4. The voltage on the distribution line and loading may have exceeded the original ratings and required upgrades to the circuit.
Either way, a new transformer with higher (always better than the old transformer) VA rating will be much less noisy and perform better and also help prevent voltage/current sagging with higher loads.
Also, being one of the first homes off of a distribution pole top transformer is always a good thing. Being the last on the last isn't very good.
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1. The transformer is overloaded and a higher capacity VA transformer is needed.
2. The old transformer contained fluids that are no longer allowed in the utility industry and had to be replaced by a new transformer that in addition to having better internal oils, it has better specifications.
3. The line loading off that transformer was sagging and a new/better transformer is needed.
4. The voltage on the distribution line and loading may have exceeded the original ratings and required upgrades to the circuit.
Either way, a new transformer with higher (always better than the old transformer) VA rating will be much less noisy and perform better and also help prevent voltage/current sagging with higher loads.
Also, being one of the first homes off of a distribution pole top transformer is always a good thing. Being the last on the last isn't very good.
enjoy