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Energy Efficiency Regulations
Technical Requirements for Transformers Manufactured Before January 1, 2010
|(Minimum Efficiency Values) High-voltage Winding|
|1.2 kV Class
at 0.35 per Unit Nameplate Load
|BIL 20-150 kV
at 0.50 per Unit Nameplate Load
|Three-Phase (January 1, 2005)|
- Minimum values of low-voltage windings for both single-phase and three-phase transformers are intended to limit the current.
- Low-voltage winding shall not have a BIL rating greater than 30 kVA.
- Efficiency values shall apply for the fundamental 60 Hz frequency only
- Reference winding temperature 75oC.
Requirements for the Energy Efficiency Report, as Listed in Schedule IV of the Regulations
- type of product (dry-type transformer);
- brand name;
- model number;
- name of the organization or province that carried out the transformer verification and authorized the verification mark that will be affixed to the transformer;
- kVA rating;
- single- or three-phase;
- low-voltage winding in volts;
- high-voltage winding rating of
(i) 1.2kV Class, or
(ii) BIL 20-150 kV;
- whether it is a three-phase with high-voltage windings and a voltage ratio that, between the highest and lowest of their rated voltages, is other than 2:1;
- tested efficiency in percent;
- the loss, in watts, when under load (load loss);
- the loss, in watts, when not under load (no-load loss).
A transformer, including a transformer that is incorporated into any other product, in which the core and windings are in a gaseous or dry compound insulating medium and that
(a) is either single-phase with nominal power from 15 to 833 kVA or three-phase with a nominal power from 15 to 7500 kVA,
(b) has a nominal frequency of 60 Hz, and
(c) has a primary voltage of 35 kV or less
but does not include,
- an autotransformer,
- a drive (isolation) transformer, with two or more output windings or a nominal low-voltage line current greater than 1,500 A,
- an instrument transformer,
- a rectifier transformer,
- a sealed transformer,
- a non-ventilated transformer,
- a testing transformer,
- a furnace transformer,
- a welding transformer,
- an encapsulated transformer, or
- a transformer with a nominal low-voltage line current of 4,000 A or more.
January 1, 2005 to December 31, 2009
list of models was available
- Date Modified: