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Installation
LTPS-UM-8007-01, Issue 1
42
November 9, 2001
SPX-CABFIN01, SPX-CABFIN04
Installing the DC Distribution Panel
The DC Distribution Panel (
) distributes the DC power used, and:
–
provides voltage and load-sensing circuitry to detect power-related problems.
–
disconnects the batteries if the battery string voltage drops below 42 Vdc, to prevent battery damage (and
reconnects at 49 Vdc).
–
provides external alarm contacts (2A max).
For DC circuit breaker and fuse assignments, and a DC power wiring diagram, refer to
and
Figure 36.
DC Distribution Panel Controls and Indicators
Removal of the Battery Disconnect Panel will not affect operation of the fuse panel.
Table 5.
DC Distribution Panel Controls and Indicators
Item
Function
CB1, CB2
(Circuit breakers: 30A max) Controls application of DC power
(rectifier or battery) to the remote digital terminal (RDT). If either
circuit breaker is set to OFF (or operated automatically), local and
remote alarms are extended.
FUSE PANEL
(Fuses: 15A max) Refer to
.
FUSE ALARM
(Red LED) Lighted when any fuse has failed, or when either circuit
breaker is set to OFF or tripped.
BATTERY DISCONNECT TEST
(Pushbutton switch) When pressed, manually tests the BATTERY
DISCONNECT ALARM circuit (without operating the low-voltage
disconnect (LVD) relay).
BATTERY DISCONNECT ALARM
(Red LED) Lighted when the low-voltage disconnect relay has
disconnected the batteries (from the load and the rectifiers.
BATTERY DISCONNECT
(Jack) When a pin (provided at right-hand side) is inserted into the
jack, manually operates the low-voltage disconnect relay, and
disconnects the batteries from the rectifiers and load.
P/N 73-16-606
1
2
-48V
-48V
-48V
RTN
RTN
-48V
MAX BREAKER 30A
RTN
-48V
RTN
-48V
RTN
-48V
-48V
RTN
RTN
-48V
BATTERY
DISCONNECT
BATTERY
DISCONNECT
BATTERY DISCONNECT
FUSE
ALARM
ALARM
TEST
RTN
3
4
5
6
1
1
5
10
MAX FUSE 15A
TOTAL AMPERAGE
OUTPUT
BREAKERS-80A MAX
GMT FUSES-50A MAX
COMBINED-80A MAX
15
20
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
NO
C
NC
NO
C
NC
FUSE ALARM
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
Fuses
Battery
disconnect panel
Circuit breakers
-48V terminal
strip