RDT series0 pages
_Model: RDT
KOHLER. Power Systems Au,oma,io 1SS3K>5SE:
O9001
V/J KOHLER
— POWER SYSTEMS
NATIONALLY REGISTERED
MPAC™ 500 Controller Features
• User-friendly interface with easy-to-read international
symbols
• Source available and contactor position indicators
• LED indication of system faults
o Failure to acquire standby source
o Failure to transfer
o Auxiliary switch fault
• Common fault contact: latches closed on system faults
shown above
• Engine start contact: provides contact closure to start the
generator set
• Load control contact: allows 5-minute delay in startup of
selected loads
• Test button (with or without load)
• Exercise set button
o Weekly 20-minute generator set exercise
o With or without load
• Single-phase voltage sensing on both sources, ±5%
• Line-to-line frequency sensing, ±2%
• Fixed time delays
Standard Features
• UL listed
o Models with load centers, UL 67 listed, file #E251086
o Models without load centers, UL 1008 listed, file #E58962
• CSA certification available, file #LR58301 (not applicable to
service entrance or load center models)
• 220/240 VAC, 50/60 Hz (selectable)
• 100, 200, and 400 amp models available
• Two-pole, single-phase open-transition transfer switch
• Contactor electrically and mechanically interlocked
• Double throw inherently interlocked design
• Solid neutral
• Contactor manually operable for maintenance purposes
• Silver alloy main contacts
• All models are 100% equipment rated and can be applied at
the rated current without derating
• 100 and 200 amp models available with or without prewired
Square D type QO load center
o 100 amp load center models use up to 16 circuit breakers
(up to 8 tandem breakers can be used for a maximum of
24 circuits)
o 200 amp load center models use up to 24 circuit breakers
o 200 amp service entrance model with 42-circuit breaker
load center is available
• Two enclosures available
o NEMA Type 1 steel ANSI 49 gray enclosure for indoor
installation. 100 amp and 200 amp models without load
centers can be recess-mounted between wall studs
(not service entrance model)
o NEMA Type 3R corrosion-resistant aluminum ANSI 49
gray padlockable enclosure. Approved for indoor or
outdoor installation
• Five-year limited warranty
• See page 5 for available accessories
Service Entrance Model Features
• 200 and 400 amp service entrance rated automatic transfer
switches available
• Service disconnect circuit breaker on the normal (utility)
source (80% rated)
• NEMA 3R aluminum ANSI 49 gray enclosure
• Circuit breaker for generator set battery charger
• See page 5 for available SE model accessories
G11-98 (Model RDT Automatic Transfer Switch) 6/13m Page 1
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