ADC PowerWorx Power Distribution Products - Manual (Page 12)

ADCP-80-545 • Issue 3 • March 2006
Page 6
© 2006, ADC Telecommunications, Inc.
The circuit breakers are of the type called “short delay.” The trip times of short delay circuit
breakers are a function of the percent of rated current, as indicated in
Table 1 . The 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 a circuit breaker, push the
switch to the on position (top pushed in).
Circuit breakers are field-replaceable. Please contact ADC Technical Support if replacement is
required (refer to
Section 7, Customer Information and Assistance, on page 28 ).
1.9 Input/Output Voltage
The Select Series circuit breaker panel accepts an input voltage of either –24 Vdc (nominal) on
both buses or –48 Vdc (nominal) on both buses. For –24 Vdc operation, the voltage can fall
within –21 to –30 Vdc. For –48 Vdc operation, the voltage can fall within a range of –42 to –56
Vdc. The output voltage is the same value as the applied input voltage.
1.10 Input Power Connections
Input power is supplied to the Select Series circuit breaker panel through the A and B input power
terminal blocks. Each input terminal block includes two pairs of studs that are used for connecting
the BATT (battery –) and RTN (return +) input power cables. Each pair of studs is mounted on
0.625 inch centers and accepts various size 2-hole compression lugs. Compression lugs for 2, 4, 6,
and 14 AWG wire are available as accessory items. Nuts with captive washers are included to
secure the compression lugs to the studs. The input terminal blocks are located on the rear side of
the panel. The minimum recommended wire size for the input power wiring is 2 AWG.
1.11 Output Power Connections
Output power is supplied to the protected equipment through the A and B output power terminal
blocks. Screw-down barrier terminal strips are used for the output power terminal blocks. Each
terminal block consists of eight pairs of screw down terminals equipped with 8-32 screws. Each
pair of terminals is used for connecting the battery (BATT) and return (RTN) output power
wiring to the protected equipment. Each terminal will accept a compression-type lug terminal
with a maximum width of 0.378 inches. Copper wire in sizes ranging from #8–16 AWG may be
used for the output power wiring. The output power terminal blocks are located on the rear side
of the panel.
Table 1. Short Delay Trip Times in Seconds
PERCENT OF RATED CURRENT
100% 135% 150% 200% 400% 600% 800% 1000% 1200%
NO
TRIP
.300-
7.00
.200-
5.00
.100-
2.00
.030-
.500
.008-
.300
.006-
.150
.005-
.100
.005-
.100