Paul Gregory Cardinal
Engineers at Holly Riv, Houston, TX
License number
Colorado 38672
Issued Date
Sep 24, 2004
Renew Date
Nov 1, 2015
Expiration Date
Oct 31, 2017
Type
Professional Engineer
Address
Address
1523 Holly River Dr, Houston, TX 77077
Professional information
Variable Voltage Load Tap Changing Transformer
US Patent:
2009020, Aug 13, 2009
Filed:
Oct 13, 2008
Appl. No.:
12/250386
Inventors:
Paul Gregory Cardinal - Houston TX, US
David Burns - Houston TX, US
David Burns - Houston TX, US
International Classification:
H05B 3/02
US Classification:
219488
Abstract:
Power supply systems for subsurface heaters are described herein. The power supply system includes a variable voltage, load tap changing transformer. Systems and methods for supplying electrical power to subsurface heaters using the variable voltage transformers are also described herein.