DC Power Distribution with Circuit Breakers
DC Power Distribution models DST-10 (UL) and DST-20A (UL)
- Model DST-10 (UL), 19” Rack mount 2U DC Power Distribution Panel. A single bus bar provides a maximum rating of 450Amp and accommodates up to 10 plug-in circuit breakers
- Model DST-20A (UL), 19” Rack mount 2U DC Power Distribution Panel. Dual isolated A and B bus bars provide a maximum rating of 900Amp when paralleled or 450Amp each when used for redundant power configurations or different voltages/ground references and accommodates up to 20 plug-in circuit breakers (10 per bus bar)
- Suitable for virtually any 48V, 24V or 12V DC Power Distribution requirements
- Each panel offers front access for quick installation of plug-in circuit breakers
Plug-In Circuit Breakers:
- Model PBA Series - circuit breaker ratings used in both DC Power Distribution Panels include: 5A, 10A, 15A, 20A, 25A, 30A, 40A, 50A, 75A or 100Amp
- Model RC-DST - a rear terminal cover is provided with each panel, as standard
Optional item:
- BBA-800 Series – nickel-plated copper bus bar rated at 800Amp for use as heavy duty DC positive or negative connection point in rack installations.
Features
Model DST-10 (UL) features a single 450 amp bus, which accepts up to 10 plug-in breakers.
Model DST-20A (UL) features dual isolated 10 circuit A and B buses, each rated at 450 amps, enabling redundant power configuration or different voltages/ground references. A and B inputs can also be paralleled, creating a single 900 amp bus.
PBA Series plug-in circuit breakers insert securely into sockets recessed in the front access panel. Breaker alarm contacts allow optional remote tripped-breaker alarm/indication. The “mid-trip” function of the circuit breaker provides quick visual identification of a failed circuit and distinguishes between an over-current trip and intentional shut-off. When tripped, the toggle handle moves to a 90° position, halfway between the “on” and manual “off” position. Specify the required amperages when ordering and plug them into the panel during installation.
Input/output wiring is rear access via bus bars that accept single or double hole lugs. Input/output buses are secured to the load breaker sockets via solid nickel-plated copper bus material.
Mounting brackets are provided to adapt the panel for 19”or 23” racks. Snap-in hole plugs are provided for unoccupied breaker positions and a clear protective cover which prevents accidental shut off of the breakers and also provides for convenient placement of circuit identification labels.
Specifications
Electrical
Nominal Input/Output:
- 48VDC
- 24VDC
- 12VDC
Total Circuit Capacity:
- DST-10 (UL): 10 Breakers
- DST-20A (UL): 20 Breakers
Total Current Capacity:
- DST-10 (UL): 450 amps (single 450 amp bus)
- DST-20A (UL): 900 amps (dual isolated 450 amp A & B buses)
Maximum Circuits per Bus: 10
Compliances
UL Listed: 1801 First Edition: Subject Standard for Power Distribution Center for Telecommunications Equipment
C22.2 No. 225-M90: Canadian Standards for Telecommunication Equipment
CE Marked
Plug-In Circuit Breakers
UL Recognized
CE Marked
Current Ratings: 5, 10, 15, 20, 25, 30, 40, 50, 75 or 100 amps
Breaker rating stamped beside toggle for easy reference
Voltage Rating: 80VDC maximum
Type: Plug-in with Auxiliary Contacts
Weight: 1 Lb / 0.45kg
Operating Temperature
-40°C to + 70°C, 450 Amps @ +35°C, derate to 400 Amps @ +40°C, 320 Amps @ +50°C, 150 Amps @ +70°C
Mechanical
Bus Bars: Nickel-plated copper; accepts single or double hole lugs
Front Panel: Anodized aluminum Cover, Rear Panel: Vinyl-laminated aluminum
Dimensions: (Both models)
| Inches | Centimeters | ||||
| H | W | D | H | W | D |
| 3.5 | 19/23 | 11 | 8.9 | 48.3/58.4 | 27.9 |
Weight (no breakers installed):
- DST-10: 9 lbs / 4.09kg
- DST-20A: 12 lbs / 5.45kg
Alarm/Indicator
Tripped Breaker Contacts via Rear Panel Connector; Normally Open configuration Note: Separate contacts for each bus on model DST-20A
Rear Panel View
Rear Terminal Cover Assemblies – (supplied as standard with each Distribution Panel
Model: RC-DST, covers rear, top and sides of bus bars. (DST panel must be flush mounted to rack face for installation of cover).
Optional Items
Return Bus Bar Assembly
Model: BBA-800, 800Amp nickel-plated copper bus bar for use as heavy duty DC positive or negative connection point in rack installations. Mounts to rear of rack; adaptable to 19″ or 23″ rack widths.
Rear Rack Covers – 3 or 7 RU
Model: RRC, clear plastic panels attach to rear, top and sides of racks to protect service personnel from accidental contact with “live” terminals. Holes in rear panels allow for flow-through ventilation of fan-cooled components. Specify 19″ or 23″, 3 RU or 7 RU height when ordering. (DST Series Distribution Panels may be either centre or flush mount to use cover)
Ordering information:
- DST-10 (UL) 10 breaker with single 450Amp bus
- DST-20A (UL) 20 breaker with dual isolated A and B Buses each 450Amp
- PBA-5 5Amp Plug-in Circuit Breaker
- PBA-10 10Amp Plug-in Circuit Breaker
- PBA-15 15Amp Plug-in Circuit Breaker
- PBA-20 20Amp Plug-in Circuit Breaker
- PBA-25 25Amp Plug-in Circuit Breaker
- PBA-30 30Amp Plug-in Circuit Breaker
- PBA-40 40Amp Plug-in Circuit Breaker
- PBA-50 50Amp Plug-in Circuit Breaker
- PBA-75 75Amp Plug-in Circuit Breaker
- PBA-100 100Amp Plug-in Circuit Breaker
Optional items:
- BBA-800 800Amp Return Bus Bar Assembly
- RRC-3-19 3 RU Rear Rack Cover 19″ rack
- RRC-7-19 7 RU Rear Rack Cover 19″ rack
- RRC-3-23 3 RU Rear Rack Cover 23″ rack
- RRC-7-23 7 RU Rear Rack Cover 19″ rack
Newmar Data Sheet
