57
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 61 is the Amptector II-A trip unit with front cover
removed, showing all of the calibration marks on the
dials. The ranges of current settings in multiples of sen-
sor rating and time delay are as follows.
1. Long-delay pick-up .5 to 1.25 X sensor rating.
2. Long-delay 8 to 36 seconds, at 6 X
sensor rating.
Over these ranges tripping will always occur within the
time band shown on Curve No. 1, page 59. The bottom of
the band is called the resettable delay.
If the overload
subsides in less than the resettable delay time, resetting
of the trip unit will occur within a few cycles after the load
drops to less than 90% of the pick-up setting.
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. 1, page 59. Although the
time adjustment i
s continuous, three time bands are cali-
brated as shown on the curve.
5. Instantaneous Pick-up 4 to 12 X sensor rating.
Three different combinations of trip elements are pro-
vided. Those combinations with the corresponding Amp-
tector II-A model designations as follows:
1. Long Delay
Instantaneous DU (DUAL)
2. Long Delay
Short Delay SE (SELECTIVE)
3. Long Delay
Short Delay
Instantaneous TR (TRIPLE)
Each Amptector II-A trip unit has a terminal block acces-
sible on t
he front of the circuit breaker front panel.
Figure 59 shows a typical standard wiring diagram, which
includes the Amptector II-A trip unit terminal block. The
following table explains the markings of the terminals.
A Sensor phase A ON Output negative*
B Sensor phase B DN Test point (internal neutral)**
C Sensor phase C DS Test point**
N Sensor neutral TP Test point**
OP Output positive* DI Test point**
*To Actuator Coil. THIS COIL HAS A POLARITY MARK-
ING
ON THE POSITIVE LEAD WHICH MUST BE
OBSERVED. OTHERWISE THE BREAKER WILL NOT
HAVE OVERLOAD OR FAULT PROTECTION WHICH
COULD RESULT IN BODILY INJURY AND/OR SERI-
OUS EQUIPMENT DAMAGE.
**Terminals marked “test point” are intended to provide
connections for operation of the optional test kit.
8.2 THE AMPTECTOR I-A TRIP UNIT
Amptector l-A trip units perform all of the functions
described above for Amptector II-A trip units and in addi-
tion provide the following.
1. Optional adjustable gr
ound fault protection with
resettable operation indicator.
2. All Amptectors l-A have a trip indicator that will indi-
cate on overload tripping and another that indicates
on short circuit tripping. (All indicators are reset man-
ually.)
Figure 62 shows the front of the Amptector l-A trip unit. A
maximum of seven adjustable controls with screwdriver
adjustments may be provided for setting the following
characteristics:
1. Long-delay current pick-up;
2. Long
-delay time;
3. Short-delay current pick-up;
4. Short-delay time;
5. Instantaneous current pick-up;
6. Ground current pick-up; and
7. Ground delay time.
Fig. 62 Optional Amptector I-A Solid-State Trip Unit.
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