Lucent Technologies Lineage
®
2000 50A Ferroresonant Rectifier J85502B-1
5 - 4 Installation
Issue 6 May 1999
Table 5-A shows the recommended customer-supplied fuse size
and type for the branch circuit protection in the ac service panel
supplying input to the rectifier. The types shown are Bussmann
(a trademark of the Bussmann Company) fuses. Equivalent UL
listed fuses or circuit breakers can be used in lieu of those shown.
If circuit breakers are used, they should have trip elements of an
equivalent rating to the recommended fuse. To avoid nuisance
tripping at rectifier turn on, the breaker instantaneous trip rating
should be at least 1000 amperes. The instantaneous trip rating
can be obtained upon request from the breaker manufacturer.
The AC EG or frame ground is normally connected using the
mechanical connection that is provided. Discard this connection
if you prefer the T&B (a trademark of the Thomas & Betts
Company) crimp connection, which is also provided. Use T&B
crimp tool WT1300 on the crimp connection. See note 57 on
J85502B-1 drawing.
DC Output Power
The majority of dc power plants for telecommunication
applications are designed to use single conductor cables (in
parallel for current capacity or to limit voltage drop) supported
on ladder racks. Experience has shown that the use of flexible
cables (welding type cables) makes installation of this type
wiring much simpler. The terminals are sized to fit KS24194 L2
wire, which is very flexible.
Figure 5-1 shows the dc output conduit hole. Figure 5-2 shows
the dc output wire termination points for both negative and
Table 5-A: AC Input Requirements
List
Volts
Amps
Line
Fuse
Type,
Rating
Input
Circuit
Breaker
Size
(amps)
Number
Of
Input
Wires,
Gauge*
Armored
Cable
Trade
Size
(inches)
for Wire
Size
Shown
Max
Input
Wire
Gauge
Conduit
Knockout
and
Conduit
Trade
Size**
(inches)
Terminal
Supplied
on
Rectifier
L1
208 or
240
8.0 or
7.0
FN, 15
15
3, #14
AWG
1/2
12
AWG
7/8,
1/2
Screw
type
L2
208 or
240
15.0 or
13.0
FN, 20
20
3, #12
AWG
*Input wire includes “green wire” ground. Use KS24194 L3 or 90°C commercial wire.
**Where the trade size of the conduit used is smaller than the trade size for which the conduit knockout was
sized, use appropriate knockout reducing washers.
