Emerson ASCO 336 Series Paralleling System User Manual

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Operator’s Manual ASCO 336 / 337
381333-427 A ASCO Power Technologies Page 1
DANGER is used in this manual to warn of a
hazard situation which, if not avoided, will result in
death or serious injury.
WARNING is used in this manual to warn of a
hazardous situation which, if not avoided, could
result death or serious injury.
CAUTION is used in this manual to warn of a
hazardous situation which, if not avoided, could
result in minor or moderate injury.
Rating Label
Each 336/337 PCS contains a rating label to define the loads
and fault circuit withstand/closing ratings. Refer to the label
on the transfer switch for specific values.
In a non-redundant system, that is, the load current is more
than one generator’s full lo ad current and the generators are
being paralleled to provide more power to the load, the CTTS
current rating must be equal to or greater than the sum of the
two generator’s full load amps.
If the application is a redundant system, that is, the load
current is equal to or less than the full load amps of one
generator and the generators are being paralleled for
redundancy, the 336 or 337 rating must be equal to or greater
than the full load current of the biggest generator. In addition,
the output of the CTTS unit must be protected by an over
current device, like a circuit breaker, equal to or less than the
CTTS rating label.
Do not exceed the values on the rating label.
Exceeding the rating can cause personal injury or
serious equipment damage.
381333-427 A
DANGER
!
WARNING
!
CAUTION
!
300 Series Power Control System
336 /337 Generator Paralleling System
Operator’s Manual
INSTALLATION ............................................... 3
FUNCTIONAL TEST .................................... 5-8
OPERATIONAL TESTING ........................ 9-10
FEATURES & OPTIONS ......................... 11-13
PROTECTIVE RELAY FUNCTIONS ............. 14
TESTING & SERVICE ................................... 15
INDEX ............................................................ 16
Table of Contents
page
WARNING
!
Refer to the outline and wiring drawings provided
with the 336 / 337 for all installation and connection
details and accessories.
Refer to the Controller User’s Guide for status
display messages, time delays, pickup and dropout
settin
g
s, and ad
j
ustments.