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the breaker when preselected conditions of current mag-
nitude and duration are exceeded.
The continuous current rating for any frame size breaker
can be changed simply by changing the sensors. The
wide range of long-delay current pick-up available on the
Amptector trip unit makes one set of sensors suitable for
a number of current ratings. The Amptector trip unit set-
ting controls are standard, and are usable with any stan-
dard sensors. If sensors are changed because of
changing load conditions, etc., it is only necessary to
readjust the Amptector trip unit controls to the new
desired values. Available sensor ratings are listed in
Table 4.
Table 4. Frame Size and Sensor Ratings
Breaker
Frame Size
Sensor Ratings, Amperes**
Type
Amperes*
DS-206
or
800
50-1
00-150-200-300-400-
DSL-206
400-600-800
DS-206S
800
100-150-200-300-400-
600-800
DS-416,
DSL-416
1600
100-150-200-300-400-600-
or
800-1200-1600
DS-4168
DS-420 2000
100-150-200-300-400-
600-800-1200-1600-2000
DS-632 3200 2400-3200
DS-840 4000 4000
*Maximum continuous current rating for breaker.
** Amptector trip unit Long Delay Pick-up is adjustable
from 50% to 125% of the sensor rating, but should not
be set above 100% when using sensor rating equal to
frame size.
8.7 OPTIONAL ACCESSORIES
In addition to the Amptector trip unit to provide overload
protection, the following optional accessories are pro-
vided as required.
OVERCURRENT
TRIP
SWITCH
1.8.
33-790-11
Fig. 65 DS-840 Breaker with Front Panel Removed
(391076)
MAIN
DISCONNECTING
CONTACTS
Fig.
66
DS-840 Breaker Rear View Showing Sensors
(391074)
Effective
October
1998
Courtesy of NationalSwitchgear.com
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