"Is my UPS distribution system coordinated?"

Author

Cosse, Roy E., Jr. ; Dunn, Donald G. ; Spiewak, Robert M.

Author_Institution

Powell Electr. Mfg. Co, Houston, TX, USA

fYear

2004

fDate

13-15 Sept. 2004

Firstpage

99

Lastpage

118

Abstract

Typical petroleum and chemical industry UPS (uninterruptible power supply) distribution systems (ANSI/IEEE Std.) are reviewed for interrupting device selectivity during short-circuit conditions. When selectivity is not achieved, alternative solutions are proposed. Distribution system selectivity comparisons are performed for standard circuit breaker panelboards, fuse panelboards and custom panelboards utilizing hydraulic-magnetic circuit breakers. When remote panels are implemented, application considerations include oversizing feeder cables or using step-up/step-down transformers. To determine the "ride through" response of individual operating plant UPS loads, the voltage depression time during UPS distribution system fault clearing is compared with the load "ride through" capability. General guidelines are provided for improved UPS distribution system performance.

Keywords

chemical industry; circuit breakers; electric fuses; petroleum industry; power distribution faults; short-circuit currents; transformers; uninterruptible power supplies; UPS; chemical industry; circuit breaker panelboards; custom panelboards; distribution system; fault clearing; feeder cables; fuse panelboards; hydraulic-magnetic circuit breakers; petroleum industry; short-circuit conditions; step-down transformer; step-up transformer; uninterruptible power supply; Cables; Chemical industry; Circuit breakers; Circuit faults; Fuses; Guidelines; Petroleum; System performance; Transformers; Uninterruptible power systems;

fLanguage

English

Publisher

ieee

Conference_Titel

Petroleum and Chemical Industry Technical Conference, 2004. Fifty-First Annual Conference 2004

ISSN

0090-3507

Print_ISBN

0-7803-8698-1

Type

conf

DOI

10.1109/PCICON.2004.1352786

Filename

1352786