58
Instruction Booklet
IB 33-790-1J
Effective November 2010
Instructions for Low Voltage Power
Circuit Breakers Types DS and DSL
EaToN CorPoraTIoN www.eaton.com
Figure 63 is the Amptector trip unit with front cover
removed, showing all of the calibration marks on the dials
and trip indicators. The ranges of current settings in mul-
tiples of sensor rating and time delay are as follow.
1. Long-delay pick-up
.5 to 1.25 X sensor rating.
2. Long-delay
4 to 36 seconds, at 6 X
sensor rating.
Over these ranges tripping will always occur within the
time band shown on Curve No. 2, page 60. The bottom of
the band is called the resettable delay. If the overload
subsides in less than the resettable delay time, resetting
of the Amptector trip unit will occur within a few cycles
after the load drops to less than 90% of the pick-up set-
ting.
3. Short-delay pick-up
4 to 10 X sensor rating.
4. Short delay
.18 seconds to .50 seconds
or 11 to 30 cycles at 60 Hz,
at 2.5 X pick-up setting.
Over these ranges tripping will always occur within the
time band shown on Curve No. 2, page 60. Although the
time adjustment is continuous, three time bands are cali-
brated as shown on the curve.
5. Instantaneous pick-up 4 to 12 X sensor rating .
6. Ground current pick-up See table on top of trip unit
or on Curve No. 2.
7. Ground delay time
.22 to .50 seconds
13 to 30 cycles at 60 Hz
Six different combinations of the above trip elements are
provided. These combinations with the corresponding
Amptector l-A model designations are as follow.
1. Long Delay
Instantaneous
LI
2. Long Delay
Instantaneous
Ground
LIG
3. Long Delay
Short Delay
LS
4. Long Delay
Short Delay
Ground
LSG
5. Long Delay
Short Delay
Instantaneous
Ground
LSIG
6. Long Delay
Short Delay
Instantaneous
LSI
*See Section 8.4 of Text for Explanation
Fig. 63 Amptector I-A Trip Unit with Front Cover Removed.
