METER-MOUNTED EXTENDER

1 . A meter-mounted extender, comprising:

(a) a transformer with primary windings and secondary windings;

(b) a load connectable to said transformer secondary windings;

where the I 2 R losses of said transformer secondary windings are substantially equal to the I 2 R losses of said transformer primary windings for said load when connected to said transformer secondary windings.

2 . The extender of claim 1 , further comprising a temperature sensor associated with said transformer secondary winding.

3 . The extender of claim 2 , further comprising a fan and vent for moving air in and out of said extender.

4 . The extender of claim 3 , wherein said vent is located in a substantially inaccessible location.

5 . The extender of claim 3 , further comprising a vent hood to protect said hood against undesired access.

6 . The extender of claim 6 , wherein said with vent hood is fan shaped to minimize the pressure drop of air therethrough.

7 . The extender of claim 3 , further comprising control circuit to turn on and off said fan in response to said transformer secondary winding temperature sensor.

8 . A method of detecting the temperature proximate the primary windings in a transformer having primary windings, secondary windings, and core, comprising the steps of:

(a) associating a thermistor to secondary windings;

(b) equalizing the I 2 R losses of the primary and secondary windings.

9 . A method of designing a transformer having primary windings, secondary windings, and core, comprising the steps of;

(a) connecting a load to the secondary windings;

(b) saturating the core;

(c) reducing the loss of the largest loss source among core, primary and secondary windings, by changing the number of turns and cross-section of the windings, thereby rendering the transformer to be a more uniform heat loss radiator.