Power Buses - ADC PowerWorx Circuit Breaker Panel With Reset Switch User Manual

ADCP-80-570 • Issue 2 • March 2006
• Rear protective input terminal covers (2) and output/alarm terminal cover (1)—Used to
prevent accidental contact with the alarm and power terminals.
• #6-32 Screws (4)—Used to fasten output/alarm terminal cover to rear of panel chassis.
• Designation card and card holder (1)—Used to record information about the protected
equipment. Cards and clear cover insert into the card holder.
• Voltage label (1)—Used to indicate whether the input voltage is –48 or –24 Vdc.
1.4

Power Buses

Each circuit breaker panel has two isolated power buses. Each bus distributes the input power to
the output power circuits. In each bus circuit, current flows from the input power bus, through
the circuit breaker, to the output power circuit. The current capacity of each bus is 45 Amps
maximum.
–24V/–48V
BATTERY A
RETURN A
–24V/–48V
BATTERY B
RETURN B
Page 4
© 2006, ADC Telecommunications, Inc.
Figure 3 is a block diagram of the power buses.
BATTERY RETURN
1
2
3
4
5
6
7
BUS A
FA
RETURN A
BUS B
FB
RETURN B
BATTERY RETURN
1
2
3
4
5
6
7
Figure 3. Circuit Breaker Panel Block Diagram
POWER A LED
BREAKER
ALARM A LED
POWER B LED
BREAKER ALARM B LED
ALARM RESET PUSHBUTTON
20691-A
C
NO
NC
SYSTEM ALARM
CONNECTIONS
C
NO
NC