2
Instruction Leaflet
IL 29C703D
Effective April 2011
Installation Instructions for Eaton Series C 600 Amp HLD-DC
Circuit Breakers, Circuit Breaker Frame and Molded Case Switch
EATON CORPORATION www.eaton.com
D
D
WARNING
CONTACTDWITHDENERGIZEDDEQUIPMENTDCANDRESULTDINDDEATH,DSEVERED
PERSONALDINJURY,DORDSUBSTANTIALDPROPERTYDDAMAGE.DDODNOTD
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WHILEDITDISDENERGIZED.DALWAYSDVERIFYDTHATDNODVOLTAGEDISDPRESENTD
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ACCEPTEDDSAFETYDPROCEDURES.D
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The user is cautioned to observe all recommendations, warnings and
cautions relating to the safety of personal and equipment, as well as
all general and local health and safety laws, codes and procedures .
Figure 1. Type HLD-DC Series C DC Circuit Breaker Frame with
L T Trip Unit Installed.
The recommendations and information contained herein are based
on Eaton experience and judgment, but should not be considered to
be all-inclusive or covering every application or circumstance which
may arise . Contact Eaton for further information or instructions .
1. Introduction and General Information
The L-frame Series C DC circuit breaker (
Figure 1
) is rated 600 Vdc
maximum with interchangeable thermal-magnetic trip units rated
600A maximum continuous current . Refer to
Table 1
for all available
trip unit ratings . Model HLD-DC circuit breakers are listed in accor-
dance with Underwriters Laboratories, Inc . Standard UL 489 .
Table 1. Available Trip Unit Ratings.
CircuitDBreakerDTypes
TripDUnitDTypes
Thermal-MagneticDAmperesDI
nD
FixedDThermal
AdjustableDMagneticD
(Instantaneous)DofDI
nD
HLD-DC
300
5 to 10
350
400
500
600
HLD-DC is rated 600 Vdc maximum with interchangeable thermal-
magnetic trip units rated 600 A maximum continuous current .
These Circuit Breakers are suitable for use in grounded and
ungrounded applications only where multiple poles are connected in
series (
Figure 2
through
Figure 5
) .
Figure 2. Load Connected to Power Source, Grounded or
Ungrounded Systems.
Power
Load
Power
Load
Breaker
Breaker
3 Pole
3 Pole
Load Connected to Power Source.
Grounded or Ungrounded Systems.
Fig. 5-1
