Browse Prior Art Database

MEDIUM VOLTAGE TRANSFORMER PAIR

IP.com Disclosure Number: IPCOM000245322D
Publication Date: 2016-Feb-29
Document File: 8 page(s) / 231K

Publishing Venue

The IP.com Prior Art Database

Abstract

Various systems that are power sensitive may require multiple power sources. Multiple power sources may be primary and secondary power grid connections, generators, battery backup systems and/or auxiliary power units. Common power sensitive systems include information technology, computer systems, server systems, medical devices and hospital systems. This multiple source transfer system does not provide a dedicated preferred source and allows for maintenance while keeping a primary load connected. The multiple source transfer system may be a Medium Voltage Transfer Pair for selection between two sources automatically by use of a programmable logic controller (PLC). A load break junction assembly is included to allow for disconnection of incoming sources during maintenance and physically isolating the control cabinet or switching system.

This text was extracted from a Microsoft Word document.
At least one non-text object (such as an image or picture) has been suppressed.
This is the abbreviated version, containing approximately 27% of the total text.

MEDIUM VOLTAGE TRANSFORMER PAIR

ABSTRACT

            Various systems that are power sensitive may require multiple power sources.  Multiple power sources may be primary and secondary power grid connections, generators, battery backup systems and/or auxiliary power units.  Common power sensitive systems include information technology, computer systems, server systems, medical devices and hospital systems.  This multiple source transfer system does not provide a dedicated preferred source and allows for maintenance while keeping a primary load connected.  The multiple source transfer system may be a Medium Voltage Transfer Pair for selection between two sources automatically by use of a programmable logic controller (PLC).  A load break junction assembly is included to allow for disconnection of incoming sources during maintenance and physically isolating the control cabinet or switching system.

BACKGROUND

Multiple Source transfer or MVTP (Medium Voltage Transfer Pair) equipment is commonly used for emergency power systems, Life Safety Systems, legally required standby systems, and/or power outage sensitive equipment to allow the operational equipment to be operated from more than one power source in event of a failure of power sources.  Maintaining Multiple Source transfer equipment generally requires cleaning, calibration, testing, repair, troubleshooting, re-torquing of cable/wiring terminations, component replacement, testing and lubrication of component's moving parts.  Current multiple source transfer equipment is designed without a selectable preferred source, which requires shutdown of the multiple source transfer equipment in order to perform maintenance and repair interrupting power to loads being served.  Existing equipment is compliant to UL1008A and UL347.

INTRODUCTION

This MVTP system will allow the equipment to be maintained and serviced without power interruption to loads being served by the MVTP and allows for various configurations by a configurable preferred source.  Maintenance includes repair, calibration, cleaning, component replacement, testing and component lubrication.  The MVTP allows isolation of individual power sections from power sources and control power without load shutdown.  Control systems can also be maintained by following described procedures during a partial shutdown for maintenance.  Total Isolation of Power to a single power section is achieved via a Loadbreak Junction Assembly and a procedure to switch the preferred source.  

DESCRIPTION

The MVTP includes three sections: a Control Cabinet; a Power Section 1 and Power Section 2; and a Loadbreak Junction Assembly, as shown in FIG. 1.  Each section can be isolated for maintenance requiring cleaning, calibration, testing, repair, troubleshooting, re-torquing of cable/wiring terminations, component replacement, testing and lubrication of component's moving parts.  Power to the section being maintained is isolated via the Loadbreak J...