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on a table top. The handle should move to mid-trip position. Plug
breaker into DST and verify alarm contact closure on rear of panel
connector.
VII) INSTALLATION OPTION - Single 900 Amp Bus
(For model DST-20A only)
If the installation requires, the 450 amp A and B input buses may
be paralleled to constitute a single 900 amp bus. This may be
accomplished by:
Running separate 450 amp cables to each of the buses from a
single power source or power source tie point, or
Running a single 900 amp cable to the A bus and a second 450
amp cable from the A bus to the B bus (or vice versa).
Refer to the Typical Wiring Diagrams on page 9. See Single Bus
Installation.
Note:
The maximum total breaker current rating for positions 1-10
(BUS A) and positions 11-20 (BUS B) remains at 450 amps each, even
when the two buses are wired in parallel.
VIII) SPECIFICATIONS
Electrical:
Nominal Input/Output:
48, 24 or 12 VDC; positive or negative ground
Total Circuit Capacity:
DST-20A: 20 breakers
DST-10: 10 breakers
Total Current Capacity:
DST-20A: 900 amps (dual 450 amp buses)
DST-10: 450 amps (one 450 amp bus)
Maximum Circuits per Bus:
10
Environmental:
Temperature Rating:
Up to 50° C ambient
Alarm/Indicator:
Tripped Breaker Contacts via
Rear Panel Connector
; Normally
Open (N.O.) configuration.
Note:
Separate contacts are provided for each bus on model DST-20A. A
and B status contact wiring cannot be paralleled in applications where
the buses are at different voltages or ground reference.
Maximum power through the alarm contacts:
1 amp @ 125 VAC
5 amps @ 30 VDC
Mechanical:
Bus Bars:
Nickel-plated copper; accept single or double hole lugs
Front Panel:
Anodized aluminum
Cover and Rear Panel:
Vinyl-laminated aluminum
Dimensions:
3.5" H x 17" W* x 11.75" D; Occupies 2 RU
*19" and 23" rack mounting brackets provided
Weight (without breakers):
DST-20A: 12 lbs. DST-10: 9 lbs.
Compliances
UL Listed:
Listing # 31ZT
UL 1801 First Edition:
Subject Standard for Power Distribution Center
for Telecommunications Equipment
C22.2 No. 225-M90:
Canadian Standards for Telecommunication
Equipment Carries the CE Mark
Warranty:
Two Years
IX) CIRCUIT BREAKER SPECIFICATIONS AND ORDERING GUIDE
Current Ratings: See list below (breaker value stamped beside
toggle)
Voltage Rating:
80 VDC max.
Type:
Magnetic-Hydraulic Plug-in with Auxiliary Contacts
(Normally Open) and Mid-Trip Function
UL Listed Telecom Breaker
CSA Certified
10,000 Amp Interrupt Capacity
To order additional or replacement breakers for the DST refer to the
following NEWMAR model or Carlingswitch part numbers:
Rating
NEWMAR Model
5 amp
PBA-5
6 amp
PBA-6
10 amp
PBA-10
15 amp
PBA-15
20 amp
PBA-20
25 amp
PBA-25
30 amp
PBA-30
40 amp
PBA-40
50 amp
PBA-50
63 amp
PBA-63
75 amp
PBA-75
100 amp
PBA-100
Note:
Other circuit breaker values are available on a special order
basis. Typical lead time is 10 weeks.
X) DST ACCESSORIES
Ground Bus Bar Assembly
* 800 amps: Model BBA-800
Rear Terminal Cover Assembly
* Specify Model RC-DST