DPB2U-AB Series

KEY FEATURES

• Two Rack Units High (3.50")
• Field Changeable Breakers
• Field Replaceable Alarm Board
• 19- or 23-Inch Rack Mounting
• Magnetic Circuit Breakers
• Dual, Independent A/B Buses
• Optional A/B Return Bus Bars
• Fully Independent A/B Alarms
• 1 to 9 Breakers per Bus
• 1 to 100A per Breaker
• 300A per Bus, 600A Total
• Voltage: 12, 24, or 48 VDC
• Positive or Negative Ground
• LED and Form C Relay Alarm Option
• -20°C to +70°C Operating Temperature

DESCRIPTION

Unipower Telecom's DPB2U-AB Series of circuit breaker panels provide distribution and overload protection for up to 18 DC circuits. The panels are two rack units (3.50 inches) high. They distribute up to 300 amperes of load current for each A or B bus, with each bus having up to 9 circuit breakers. Each bus can be independently configured. The buses can be configured for 12, 24, or 48 volts, positive or negative grounds.

Magnetic circuit breaker capacities are from 1 to 100 amperes. The breakers can be removed and replaced from the front of the unit by disconnecting on the back and removing the front panel cover. Optional breaker alarms have dual-color LEDs (green/red) and Form C relay contacts.

The input bus terminations are to copper bus bars. The standard model does not have return bus bars, but Option R does.

The panels can be ordered for mounting in either a 19- or 23-inch relay rack. They are flush mounted to the rack.

INPUT / OUTPUT

• Panel Capacity: 300A Per Bus, 600A Total
• Configuration¹: Dual A/B Bus, 1 to 9 Breakers Each
• Breaker Capacity²: 1A to 100A
• Voltage³
  • 48V Version: 42-60 VDC
  • 24V Version : 21-30 VDC
  • 12V Version: 10.5-15 VDC
• Polarity³: Positive or Negative Ground

ALARMS

• LED Alarm Indicators: Dual-Color LEDs
• LED Status Indication
  • Green = Normal
  • Red = Alarm
  • Off = No Power
• Alarm Connections: A/B Form C Relay Contacts

SAFETY STANDARDS: UL60950, CSA22.2 #60950, EN60950

ENVIRONMENTAL

• Operating Temp. Range: -20°C to +70°C
• Storage Temp. Range: -40°C to +85°C
• Humidity: 0% to 95%, Non-Condensing

PHYSICAL

• Case Material: Steel
• Dimensions
  • DBP2U-AB-19: 3.50"H x 19.00"W x 10.19"D (88.9mm x 483mm x 259mm)
  • DBP2U-AB-23: 3.50"H x 23.00"W x 10.19"D (88.9mm x 584mm x 256mm)
• Weight: 9.55 lbs (4.33 kg)
• Rack Mounting Width: 19 or 23 inches

CONNECTIONS

• Input Connections: Bus Bars with Holes for 3/8" Bolts
• Output Connections: 1/4-20 Studs on Circuit Breakers
• Fail Alarm Connections: Screw Terminals

NOTES:

1. Circuit breakers are installed in positions 1 to 9 in descending order of current capacity. Unused positions have a blank panel installed. Breakers above 50A will have blank panel space between them.
2. See table for breaker capacities.
3. See Ordering Guide to specify voltage and polarity.