Rack protection monitor

Patent · 01 January 2000

OSTI ID:873146

Orr, Stanley G ^[1]

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1. Wheaton, IL

A hardwired, fail-safe rack protection monitor utilizes electromechanical relays to respond to the detection by condition sensors of abnormal or alarm conditions (such as smoke, temperature, wind or water) that might adversely affect or damage equipment being protected. When the monitor is reset, the monitor is in a detection mode with first and second alarm relay coils energized. If one of the condition sensors detects an abnormal condition, the first alarm relay coil will be de-energized, but the second alarm relay coil will remain energized. This results in both a visual and an audible alarm being activated. If a second alarm condition is detected by another one of the condition sensors while the first condition sensor is still detecting the first alarm condition, both the first alarm relay coil and the second alarm relay coil will be de-energized. With both the first and second alarm relay coils de-energized, both a visual and an audible alarm will be activated. In addition, power to the protected equipment will be terminated and an alarm signal will be transmitted to an alarm central control. The monitor can be housed in a separate enclosure so as to provide an interface between a power supply for the protected equipment and the protected equipment.

• Research Organization: Fermi National Accelerator Laboratory (FNAL), Batavia, IL (United States)
• DOE Contract Number: AC02-76CH03000
• Assignee: United States of America as represented by United States (Washington, DC)
• Patent Number(s): US 6100807
• OSTI ID: 873146
• Country of Publication: United States
• Language: English

Related Subjects

/340/335/
abnormal
abnormal condition
activated
addition
adversely
adversely affect
affect
alarm
alarm condition
alarm conditions
alarm relay
alarm signal
audible
central
coil
coils
condition
conditions
control
damage
de-energized
detected
detecting
detection
detection mode
detects
electromechanical
enclosure
energized
equipment
fail-safe
hardwired
housed
interface
mode
monitor
monitor utilizes
normal condition
power
power supply
protected
protection
protection monitor
provide
rack
rack protection
relay
relays
remain
reset
respond
results
sensor
sensors
separate
signal
smoke
supply
temperature
terminated
transmitted
utilizes
visual
water
wind