Energy conserving transformer power supply system

Patent · Tue Jul 10 04:00:00 EDT 1979

OSTI ID:5473826

Wald, H

An energy conserving transformer power supply system is presented that is comprised of one main transformer of large capacity to carry the maximum load under normal occupancy hours and one auxiliary transformer of relatively very small capacity to carry the utmost minimum load under non-occupancy hours (nights and week-ends) being supplied from the same load distribution center. A transfer switching means is provided to alternately transfer the power supply from main to auxiliary transformer or vice-versa in response to the control action of a program timer switching means in accordance with the timing schedule of the occupancy and non-occupancy hours. Additional current sensing means is provided to override the program timer switching action should the demand load exceed a predetermined low level and to restore the main control action on the program timer after cessation of such temporary condition. An alternate simplified arrangement provides a steady energization of the auxiliary transformer, while the de-energization of the main transformer is controlled by a program timer in combination with various control means.. For a plurality of transformer units installed on various floors of tenant spaces in office buildings, a master program timer control means is provided in a central location to maintain the building control over the time-scheduled operation of the transfer switching means and temporary overriding is selectively provided. By the controlled de-energization methods provided in this invention, a substantial reduction of the no-load losses of the main transformer is accomplished.

• Assignee: TIC; EDB-80-049701
• Patent Number(s): US 4160917
• OSTI ID: 5473826
• Country of Publication: United States
• Language: English

Related Subjects

32 ENERGY CONSERVATION, CONSUMPTION, AND UTILIZATION
320102* -- Energy Conservation
Consumption
& Utilization-- Office Buildings-- (-1987)
BUILDINGS
DESIGN
ELECTRICAL EQUIPMENT
ELECTRONIC CIRCUITS
ENERGY CONSERVATION
EQUIPMENT
LOAD MANAGEMENT
MANAGEMENT
OFFICE BUILDINGS
POWER SYSTEMS
SWITCHING CIRCUITS
TRANSFORMERS