Thursday, November 10, 2016

Are there any transformers exempt from DOE2016 legislation?

As defined by DOE 10 CFR 431.192 a Distribution transformer means a transformer that

Has an input voltage of 34.5 kV or less;

Has an output voltage of 600 V or less;

Is rated for operation at a frequency of 60 Hz; and

Has a capacity of 10 kVA to 2500 kVA for liquid-immersed units and 15 kVA to 2500 kVA for dry-type units.

These are the transformers subjected to the DOE 2016 requirements.

Exceptions are defined by the same DOE 10 CFR 431.192.(5):

The term “distribution transformer” does not include a transformer that is an:

(i) Autotransformer;

(ii) Drive (isolation) transformer;

(iii) Grounding transformer;

(iv) Machine-tool (control) transformer;

(v) Non-ventilated transformer;

(vi) Rectifier transformer;

(vii) Regulating transformer:

(viii) Sealed transformer;

(ix) Special-impedance transformer;

(x) Testing transformer;

(xi) Transformer with tap range of 20 percent or more;

(xii) Uninterruptible power supply transformer, or

(xiii) Welding transformer.

Drive (isolation) transformer means a transformer that:

(1) Isolates an electric motor from the line;

(2) Accommodates the added loads of drive-created harmonics; and

3) Is designed to withstand the additional mechanical stresses resulting from an alternating current adjustable frequency motor drive or a direct current motor drive.

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