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ADCP-80-531 • Issue 4 • July 2004
1.7
Circuit Breakers
The circuit breakers are magnetic actuation, manual reset, single pole, replaceable, 60 Vdc rated
circuit breakers, with finger guard and ampere markings. Circuit breaker values of 1, 3, 5, 10,
15, and 20 Amperes capacity are available. Each circuit breaker can be field-replaced by another
breaker with a different current rating or time delay. A breaker with a higher current rating may
be installed as a replacement as long as the total current draw of the affected bus does not
exceed 100 Amps.
The circuit breaker panel will accommodate from one to eight circuit breakers for each bus (up
to eight circuit breakers installed on each side of the panel). Each circuit breaker position that
does not have a circuit breaker installed will be filled with a black-colored blank plastic plate.
Any circuit breaker mounting positions that are left blank when the panel is ordered cannot be
fitted with field-installed circuit breakers.
Two types of circuit breakers are available. One type trips instantly and one type trips after a
short delay. The trip times as a function of the percent of rated current are shown in
circuit breaker will trip (open) and the switch will move to the "OFF" position (bottom pushed
in) when the circuit current exceeds the capacity of the circuit breaker. To reset the circuit
breaker, push the switch to the "ON" position (top pushed in).
TRIP TIME
in
seconds
1.8
Power-On Indicator
A green LED power-on indicator for each power bus is mounted on the front panel of the circuit
breaker panel. If the LED indicator is on, power is applied to the bus input connectors. If the
green LED indicator is off, power is not applied to the bus input connectors. The Power-On
LED is field-replaceable (see
Page 10
© 2006, ADC Telecommunications, Inc.
Table 1. Circuit Breaker Trip Times
PERCENT OF RATED CURRENT
DELAY
100%
135%
Instant
NO
MAY
TRIP
TRIP
Short
NO
.300-
TRIP
7.00
Subsection 7.4, Power-On LED
150%
200%
400%
.100
.100
.100
MAX
MAX
MAX
.200-
.100-
.030-
5.00
2.00
.500
Replacement).
Table
600%
800%
1000%
.100
.100
.100
MAX
MAX
MAX
.008-
.006-
.005-
.300
.150
.100
1. The
1200%
.100
MAX
.005-
.100
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