WARNING
TYPE DSII AND DSLII BREAKERS ARE PROTECTIVE DEVICES. AS
SUCH, THEY ARE MAXIMUM CURRENT RATED DEVICES. THEREFORE,
THEY SHOULD NOT UNDER ANY CIRCUMSTANCES BE APPLIED OUT-
SIDE THEIR NAMEPLATE RATINGS. OPERATION OUTSIDE OF THESE
RATINGS COULD RESULT IN DEATH, BODILY INJURY OR PROPERTY
DAMAGE.
1-2 SAFETY FEATURES
Types DSII and DSLII Circuit Breakers and associated drawout
equipment are manufactured with built-in interlocks and safety
related features. They are provided to reduce hazards to operat-
ing personnel and provide proper operating sequences.
WARNING
TYPES DSII AND DSLII CIRCUIT BREAKERS ARE STRONGLY BUILT AND
PROVIDED WITH SAFETY FEATURES. NEVERTHELESS, THE VOLTAGES,
CURRENTS AND POWER LEVELS AVAILABLE IN AND AROUND THIS
EQUIPMENT WHEN IT IS IN OPERATION ARE EXTREMELY DANGER-
OUS AND COULD BE FATAL UNDER NO CIRCUMSTANCES SHOULD
INTERLOCKS AND OTHER SAFETY FEATURES BE MADE INOPERATIVE,
AS THIS MAY RESULT IN DEATH, BODILY INJURY OR PROPERTY DAM-
AGE.
1-3 SAFETY PRACTICES
To protect personnel associated with the installation, operation
and maintenance of this equipment, the following practices
must be followed:
1. Only qualified electrical personnel familiar with the equip-
ment, its operation and the associated hazards should be
permitted to work on the equipment. Additionally, only quali-
fied personnel should be permitted to install or operate the
equipment.
2. Always be certain that the primary and secondary circuits are
de-energized or the circuit breaker is removed to a safe work
location before attempting any maintenance.
3. For maximum safety, only insert a completely assembled
breaker into an energized cell.
Table 1.1 Type DSII Breaker Ratings
Interruption Ratings, RMS Symmetrical Amperesj
Breaker Frame With Instantaneous Trip With Short Delay Tripkl
Type Size, Amp. 208-240 V 480 V 600 V 208-240 V 480 V 600 V
DSII-308 800 42,000 30,000 30,000 30,000 30,000 30,000
DSII-508 800 65,000 50,000 42,000 50,000 50,000 42,000
DSII-608 800 65,000 65,000 50,000 65,000 65,000 50,000
DSII-516 1600 65,000 50,000 42,000 50,000 50,000 42,000
DSII-616 1600 65,000 65,000 50,000 65,000 65,000 50,000
DSII-620 2000 65,000 65,000 50,000 65,000 65,000 50,000
DSII-632 3200 85,000 65,000 65,000 65,000 65,000 65,000
DSII-840 4000 130,000 85,000 85,000 85,000 85,000 85,000
j Maximum voltages at which the interrupting ratings apply are:
System Voltage Maximum Voltage
208 or 240 254
480 508
600 635
k Also short-time ratings.
l Short circuit ratings of non-automatic breakers except the DSII-840/850 which is 65,000.
Effective July 2010
Instructional Book IB694C694-03
8
EATON CORPORATION www.eaton.com
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