Lucent Technologies Lineage 2000 User manual

Product Manual
KS-23832
161-200-101
Comcode 106842479
Issue 3
September 1996
Lucent Technologies
LINEAGE®2000 DC-DC Converter
and Converter Shelf Assembly
+24V @ 25A to -48V @ 10A
Notice:
Every effort was made to ensure that the information in this
document was complete and accurate at the time of printing.
However, information is subject to change.
©1996 Lucent Technologies
All Rights Reserved
Printed in U.S.A.

Lucent Technologies DC-DC Converter and Shelf Assembly
Issue 3 September 1996 Table of Contents - 1
Table of Contents
Introduction
General 1-1
Technology Highlights 1-2
Technical Support 1-3
USA, Canada, Puerto Rico, and the US Virgin Islands 1-3
Central and South America 1-3
Europe, Middle East, and Africa 1-4
Asia Pacific Region 1-4
Product Repair and Return 1-4
USA, Canada, Puerto Rico, and the US Virgin Islands 1-4
Central and South America 1-4
Europe, Middle East, and Africa 1-4
Asia Pacific Region 1-4
Customer Service 1-4
Product Description
General 2-1
Mechanical and Electrical Specifications 2-1
Alarms 2-4
Additional Features 2-4
Environmental Specifications 2-4
Installation
Introduction 3-1
Input Connections 3-1
Output Connections 3-1
Alarm Connections 3-2
Installation Checks 3-2
Interconnection 3-2
Installing Converter in Shelf 3-3
Operational Checks 3-3
Load Sharing 3-3
Turn On 3-3
Factory Settings 3-3

Lucent Technologies DC-DC Converter and Shelf Assembly
Table of Contents - 2 Issue 3 September 1996
Maintenance and Troubleshooting
Adjustments 4-1
Troubleshooting 4-1
References
6 Product Warranty

Lucent Technologies DC-DC Converter and Shelf Assembly
Issue 3 September 1996 List of Figures - 1
List of Figures
Figure 1-1: DC-DC Converter Shelf Assembly
KS-23832 List 7 1-2
Figure 4-1: Front View, DC-DC Converter KS-23832 List 1A
4-2
Figure 4-2: Extended Cable Assembly KS-23832 List 5 4-3
Figure 4-3: Front View (Top) and Rear View (Cover Removed),
DC-DC Converter Shelf Assembly KS-23832 List 7 4-3

Lucent Technologies DC-DC Converter and Shelf Assembly
List of Figures - 2 Issue 3 September 1996

Lucent Technologies DC-DC Converter and Shelf Assembly
Issue 3 September 1996 List of Tables - 1
List of Tables
Table 2-A: Specific Characteristics and Ratings,
Lists 1A - 9 2-2
Table 2-3: Electrical Specifications 2-3
Table 5-A: Drawing References 5-1

Lucent Technologies DC-DC Converter and Shelf Assembly
List of Tables - 2 Issue 3 September 1996

Lucent Technologies DC-DC Converter and Shelf Assembly
Issue 3 September 1996 Introduction 1 - 1
1 Introduction
General Thank you for making the Right Choice, a Lucent Technologies
LINEAGE®2000 Energy Systems product.The LINEAGE®
2000 family name of premier energy system products is globally
recognized as the right choice for the ultimate in systems
performance and reliability. Selecting this product brings the
Lucent Technologies commitment to product and service
excellence to your own telecommunication system. This long-
standing Lucent Technologies commitment has been gained
from over 80 years of worldwide telecommunication experience
inthedevelopment,manufacturing,engineering,installationand
service of leading edge energy systems, products and services.
Lucent Technologies Energy Systems power plant capacity is
designed formodular growth by addinga connectorized rectifier
shelf assembly. This allows growth and maintenance without
interrupting power to the using systems.
The KS-23832 List 1A DC-DC Converter and its connectorized
shelf assembly (KS-23832 List 2) complement these features.
The LINEAGE®2000 KS-23832 +24 volt to -48 volt DC-DC
converter system utilizes50kHz technology toprovide a reliable
and economical means to obtain closely regulated and filtered
-48 volt DC power when only one primary source of +24 volt
DC power is available. The converter shelf assembly (CSA)
incorporates two 10-ampere 24-volt to -48 volt converters and
the hardware to mount them. (See Figure 1-1.)

Lucent Technologies DC-DC Converter and Shelf Assembly
1 - 2 Introduction Issue 3 September 1996
Technology
Highlights The DC-DC converter system consists of a KS-23832 L-2
converter shelf assembly equipped with two KS-23832 L-1A 10
ampere +24 volt to -48 volt Converters. Distribution to the
-48 volt load is provided via an ED83120-30 G-2 fuse panel
equipped with two fuse blocks each arranged to accommodate
eight 1- to 30-ampere distribution fuses and associated alarm
fuses.
The converter shelf assembly and distribution fuse panel have
mounting brackets for standard 23-inch or 26-inch relay rack
mounting.Each converter module contains a blocking diode and
circuitry for load sharing, current limiting, high voltage
shutdown and converter automatic restart. The converter shelf
assembly is equipped with a major and minor alarm.
• Blocking Diode: the blocking diode on the converter output
isolates a failed converter module from the output bus to
protect other modules for parallel operation.
• Load Sharing: load sharing enables two or more modules to
proportionally share the load.
• Current Limiting: the current limiting circuit protects the
module from internal/external faults by limiting the output
current to 110% of the output rating.
Figure 1-1: DC-DC Converter Shelf Assembly
KS-23832 List 7
DC - DC CONVERTER
ON
OFF
+-
OUTPUT
VOLTS
ADJUST
POWER SUPPLY
LISTED 340Y
E7188836
MODEL: KS-23832 LIST 1A
INPUT: +26 VDC,25 A
OUTPUT: -48 VDC, 10 A
CONVERTER
FAIL
0 25 50 75
0 5 10 15
DC VOLTS
DC AMPERES
CONVERTER VOLTS
OUTPUT CIRCUIT
Lucent
U
L
LUCENT HELP NUMBER
1-800-225-RTAC
DC - DC CONVERTER
ON
OFF
+-
OUTPUT
VOLTS
ADJUST
POWER SUPPLY
LISTED 340Y
E7188836
MODEL: KS-23832 LIST 1A
INPUT: +26 VDC,25 A
OUTPUT: -48 VDC, 10 A
CONVERTER
FAIL
0 25 50 75
0 5 10 15
DC VOLTS
DC AMPERES
CONVERTER VOLTS
OUTPUT CIRCUIT
Lucent
U
L
LUCENT HELP NUMBER
1-800-225-RTAC
7.00
17.00
15.40

Lucent Technologies DC-DC Converter and Shelf Assembly
Issue 3 September 1996 Introduction 1 - 3
• High Voltage And Low Voltage Alarms: the high and low
voltage detection circuits monitor the output voltage and
provide an indication to the major and minor alarm circuits
when the thresholds are exceeded.
• High Voltage Shutdown: the high voltage shutdown circuit
protects the modules and the connected load from high
voltage surges by automatically shutting down the converter
when the voltage exceeds 58.0 + 0.5 volts.
• Restart Circuit: the restart circuit attempts to restart a failed
converter after a high voltage shutdown. If the high voltage
condition has ceased within the time limit (approximately
3-5 seconds), the converter will restart. If the high voltage
condition is still present, the converter will lock out.
• Major and Minor Alarm: the converter shelf assembly has
two Form “C” contacts, one for converter major and one for
converter minor. When one converter fails, the converter
minor relay will operate and when two converters fail, the
converter major relay will operate.
Technical
Support Technical support for Lucent Technologies equipment is
available to customers around the world.
USA, Canada,
Puerto Rico, and
the US Virgin
Islands
On a post-sale basis, during the Product Warranty period, our
Technical Support telephone number 1-800-CAL RTAC (1-800-
225-7822) provides coverage during normal business hours.
Product Specialists are available to answer your technical
questions and assist in troubleshooting problems. For out-of-
hours EMERGENCIES, the 800 number will put you in touch
with a Regional Technical Assistance Center Engineer via our
24 hour a day, 7 day per week Help Desk.
When Technical Support is required in the Post-Warranty
Period, the service may be billable unless you hold an extended
warranty or contractual agreement.
Central and
South America If you need product technical support, contact your local Field
Support/Regional Technical Assistance Center or contact your
sales representative who will be happy to discuss your specific
needs.

Lucent Technologies DC-DC Converter and Shelf Assembly
1 - 4 Introduction Issue 3 September 1996
Europe, Middle
East, and Africa If you need product technical support, contact your local Field Support/Regional Technical Assistance Center or contact your
sales representative who will be happy to discuss your specific
needs
Asia Pacific
Region If you need product technical support, contact your local Field Support/Regional Technical Assistance Center or contact your
sales representative who will be happy to discuss your specific
needs.
Product Re
p
air
and Return Repair and return service for Lucent Technologies equipment is
available to customers around the world.
USA, Canada,
Puerto Rico, and
the US Virgin
Islands
For information on returning of products for repair, customers
may call 1-800-255-1402 for assistance.
Central and
South America If you need to return a product for repair, your sales representative will be happy to discuss your individual situation.
Europe, Middle
East, and Africa If you need to return a product for repair, your sales representative will be happy to discuss your individual situation.
Asia Pacific
Region If you need to return a product for repair, your sales representative will be happy to discuss your individual situation.
Customer
Service For customer service, any other product or service information,
or for additional copies of this manual or other Lucent
Technologies documents, call 1-800-THE-1PWR
(1-800-843-1797). Specify the select code number for manuals,
or drawing number for drawings. These numbers are listed in the
following reference table.
Contact your regional customer service organization or sales
representative for information regarding spare parts.

Lucent Technologies DC-DC Converter and Shelf Assembly
Issue 3 September 1996 Product Description 2 - 1
2 Product Description
General The KS-23832 Converters and Converter Shelf Assembly use a
single output designed to provide a regulated -48 volts dc rated
at 10 amperes dc full load from a +24 volts dc battery input
source.
The converter has an overvoltage detection circuit that shuts the
unit off if the output exceeds a predetermined level. It also has a
high/low detector that generates an alarm if the output is below
or above a predetermined level.
The converter assembly can hold up to two converters or 10
amperes dc redundant capacity. Input and output terminations
are provided on the back of the unit accessed via a protective
cover through knockouts on each side.
Mechanical
and Electrical
Specifications
The KS-23832 converter and shelf assembly are designed to be
used in a variety of cellular applications within a 24-volt dc
battery plant. Examples of such plants include the Lucent
Technologies LINEAGE®2000 J85500E-1 and H569-403 bays.

Lucent Technologies DC-DC Converter and Shelf Assembly
2 - 2 Product Description Issue 3 September 1996
Table 2-A: Specific Characteristics and Ratings,
Lists 1A - 9
Product Characteristics
List 1A Converter 6.9" H x 8.4" W x 10.0" D
Weight: 8 lbs
UL Listed
List 2 Converter
Shelf Assembly 7.0" H x 23" or 26" W x 16.0" D
Weight: 12 lbs
Allow at least 3.5" for air circulation above
List 2
UL Listed
List 3 Mounting
Bracket Used to mount shelf assembly in 23" or 26" frames
List 4 Blank Panel 6.88" H x 8.35" W x 9.9" D x 0.125" T
Weight: 8 oz
List 5 Cable
Extended Assembly 18" L
Weight: 8 oz
List 7 Converter
Shelf Assembly 7.0" H x 23" or 26" W x 16.0" D
Weight: 28 lbs
List 8 Sloped Heat
Deflector Baffle 4.05" H (including 0.555" mounting flange) x 14.3" D x 17.15" W
Weight: 2 lbs
Replaces top grill work of List 2 Converter
Shelf Assembly
Allow at least 3.5" for air circulation above
List 2
List 9 Converter
Shelf Assembly 7.0" H x 23" or 26" W x 16.0" D
Weight: 20 lbs

Lucent Technologies DC-DC Converter and Shelf Assembly
Issue 3 September 1996 Product Description 2 - 3
Table 2-3: Electrical Specifications
Product Characteristics
Input Voltage 20 to 28 volts dc at 25 amperes
Output Voltage -48 volts dc at 10 amperes dc, adjustable
within a range of -47 to -54 volts dc for output
currents of 0 to 10 amperes dc
Output Voltage
Regulation ±2% for any combination of line, load or temperature. At 20 volts dc input, maximum
output voltage at 10 amperes dc is 50 volts dc
Output Noise Less than 26 dBrnc; wideband noise less than
30 mv rms or less than 100 mv peak to peak
over the frequency range 10 Hz to 20 mHz
Initial Startup Converter starts approximately 4 seconds after
the input circuit is switched on
Low Input Shutdown
Voltage Activates at 19 volts dc
Restart Input
Threshold 21 volts dc nominal
High Voltage
Shutdown Detection
Threshold
58.0±0.5 volts dc. After high voltage
shutdown, converter will attempt to restart. If
high voltage condition remains after restart,
HVSD activates, causing converter to shut
down and lock out; switch the input circuit
breaker to the “Off” position. Wait
approximately 35 seconds, then switch the
circuit breaker to the “On” position
Manual Shutoff and
Restart If the converter is turned off manually for longer than 15 seconds, wait 35 seconds or
longer before restarting the converter
Efficiency 80% or greater at nominal input voltage from
50% to 100% load
Panel Meter
Accuracy ±5% of full scale. Pin jacks are provided to measure outputvoltages with greater accuracy;
external shunts may be used to measure
current with greater accuracy
EMI Requirements Complies with FCC Docket 20780, Part 15,
Subpart J, Class A
Heat Dissipation 450 BTU/hour

Lucent Technologies DC-DC Converter and Shelf Assembly
2 - 4 Product Description Issue 3 September 1996
Alarms The Converter Shelf Assembly alarms are arranged so that an
isolated contact closure or minor alarm occurs between two
terminals when one converter fails. A second isolated contact
closure or major alarm occurs when both converters fail. The
CSA has two Form “C” contacts, one for converter major and
one for converter minor alarms.
The Converter Fail Alarm (CFA) will be issued for any or all of
the following conditions:
1. A high voltage shutdown.
2. Operation of an internal fuse and/or overcurrent operation
of the input circuit breaker if provided (Fuse Alarm).
3. A high voltage alarm activates at -56 ± 0.5 volts dc.
4. A low voltage alarm activates at -43 ± 0.5 volts dc. CFA
results in an illuminated red front panel LED labeled CFA
and causes operation of the CFA alarm relay.
Additional
Features Natural convection cooling is provided. The converter MTBF
(mean time between failures), calculated in accordance with
Bellcore TR-TSY-000332,is in excess of 67,000 hours at 40° C,
sea level, nominal input line and full load. The converter has a
calculated life of 10 years when operated at 40° C, sea level and
full load.
Environmental
Specifications These units are capable of operating in air temperatures within a
range of 0° C to 50° C for altitudes within the range of -200 to
5000 feet. Between 5000 and 13,000 feet, derate the ambient
temperature by 2° C per 1000 feet as the altitude increases.
These units are capable of operating in a relative humidity
between 10% and 95% (noncondensing). The List 1A is capable
of being stored at any temperature between -40° C and 85° C
without being damaged.
These units remain operational when mounted in a frame and
subjected to earthquake zone 4 conditions.

Lucent Technologies DC-DC Converter and Shelf Assembly
Issue 3 September 1996 Installation 3 - 1
3 Installation
Introduction This section covers the input, output and alarm connections
needed to install the KS-23832 converter and shelf assembly,
and discusses installation checks, operational checks, load
sharing, factory settings and initial turn-on of the unit.
Lucent Technologies recommends that only persons trained and
experienced in the installation of telecommunications power
equipment install the converter and its associated shelf
assembly.
Input
Connections Typicallythe input connections are madeat the terminalblock at
the rear of the converter shelf assembly through knockouts
provided on the side of the units. Bushings are provided to
prevent chafing the 8 AWG stranded wire with the appropriate
terminals attached. Cable assemblies color coded red and black
are provided for the J85500E-1 and H569-403 Bays. These are
usually included in the kits for the appropriate List numbers for
each bay along with the 45-ampere circuit breakers to mount on
the 24-volt bus at the upper part of these bays.
Output
Connections Typically the output connections are run at the same time
(through bushings placedin the knockout holes onthe side of the
converter shelf assembly) as the input connections using cable
assemblies for connections to output distribution within the bays
in question. If distribution or converter shelf assemblies are
mountedin supplemental bays, then thevoltage drop calculation
shown on the engineering drawing for the bay in question should
used to determine the wire size for the length of run in question.
Gutter tapping may be required if the wire size and/or terminal
selected is larger than the converter can accommodate.

Lucent Technologies DC-DC Converter and Shelf Assembly
3 - 2 Installation Issue 3 September 1996
Alarm
Connections The alarm connections are made on the rear terminal, usually at
the sametime asinput and outputconnections, through bushings
placed in the knockout holes. It may be feasible to use current
limiting resistors (1K ohms, 2 watt) along with small gauge (20
AWG) wire to terminate the alarm connections (major and
minor to the ECS or a similar controller if available in the same
bay). Otherwise alarm connections will be made directly to the
alarm office termination points.
Installation
Checks The mounting shelf is equipped with reversible brackets for
flush fit mounting in 23-inch or 26-inch frames. For ease of
mounting, the one or two List 1A modules should be removed
from the mounting shelf. This is accomplished by loosening the
two lock screws, grasping the front handle, and pulling the
module out of the rack.
Interconnection The input, output and alarm connections are made to the 14-
point barrier terminal block on the rear panel beneath the cover
and through the bushings inserted when the knockouts are
removed. The details of these connections are shown on the
appropriate T or SD drawing for the J85500E-1 or H569-403
bay. Theoutput maybe connected directly in parallel, since each
converter module contains an output isolating diode.
Note
The List 2, List 7, or List 9 converter shelf assembly shouldbe
mounted away from heat sensitive equipment. The ventilation
louvers in the top and bottom of the shelf assembly must not
be obstructed.
Warning
The input to each List 1A converter module should be
supplied from an individually protected circuit. Otherwise, a
fault in one module may cause the entire converter system to
fail.

Lucent Technologies DC-DC Converter and Shelf Assembly
Issue 3 September 1996 Installation 3 - 3
Installing
Converter in
Shelf
To install the KS-23832 converter in the List 2 mounting shelf,
turn off the circuit breaker, insert the List 1A converter in the
guides, slide in the module to engage the connector and secure
the two lock screws.
Operational
Checks Verify that the converter system is properly installed and interconnected. Turn on the circuit breaker of each module one
at a time and verify that the front panel dc voltmeter measures
the output. If a load bank is available, the individual List 1A
converters should be checked to verify that each one provides
the rated output current.
Load Sharing The converters are connected for load sharing. If the load
currents are not balanced, adjust the output voltage of either
List 1A converter until the load currents are equal.
Turn On Connect the load and turn on the KS-23832 List 1A converter's
circuit breaker. If the load requires more current than one
module can deliver, the first module energized will
automatically reduce its output voltage to keep the current
within its capacity. When enough converters to supply the load
current have been turned on, the first module's load voltage will
rise to the correct regulated value.
Factor
y
Settin
g
s• The default set point for the output voltage is -52 volts dc at
5 amperes dc with 26 volts dc input.
• The low input voltage shutdown set point is 19 volts dc
nominal. There is a 2 volts dc hysteresis such that the
converter will restart at a nominal 21 volts dc.
• The low output voltage alarm is factory set to -43 ± 0.5 volts
dc.
• The high voltage alarm is factory set at -56 ± 0.5 volts dc.
• The high voltage shutdown is factory set to -58 ± 0.5 volts
dc.
Warning
The circuit breaker must be in the off position before
installing the KS-23832 converter into the converter shelf
assembly. If not, the current inrush to the converter may cause
the connector to weld.

Lucent Technologies DC-DC Converter and Shelf Assembly
Issue 3 September 1996 Maintenance and Troubleshooting 4 - 1
4 Maintenance and
Troubleshooting
Adjustments The KS-23832 converters do not require routine maintenance.
The outputvoltage ofthe converter maybe adjusted by means of
the R5 potentiometer located on the front panel (see Figure 4-1).
To adjust the output voltage, either disconnect the output from
the common output bus or de-energize all other paralleled
converters. Connect a precision voltmeter to the test jacks on the
front panel and adjust the R5 potentiometer to obtain the desired
output voltage. All other adjustments are internal and set at the
factory. Readjustment ofthese internal set points is normally not
required in the field and should not be tampered with unless a
trained technician familiar with the converter's operation has the
correct equipment and procedure to make the required
adjustments. Internal adjustments typically require the use of a
special cable extended assembly (KS-23832 L5,
CC#406475426, see Figure 4-2) to permit operation of the
converter external to the KS-23832 L2 shelf assembly (see
Figure 4-3). Failure to follow the correct procedures or an
incorrectsettingmay create orintroduce operationalproblems in
the KS-23832 converter systems.
Troubleshoot-
ing Servicing this equipment requires specialized equipment and is
not recommended. If you require assistance, please contact your
regional technical assistance center on our toll free number:
1(800)-225-RTAC.
Notice
If it can be determined that the converter's internal settings
were inadvertently misadjusted and caused some sort of
failure, the warranty on the unit may be void.