ATT DEFINITY Communications System Generic 3 Planning And Configuration Instructions Manual

							aaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaPOWER AND GROUNDING
Figure 16 shows a typical power and grounding layout for a remotely located EPN cabinet.  A
ground wire must be connected from the cabinet ground block of both the PPN and EPN cabinets
to an approved ground.  (Also see ``Grounding, later in this section).
OR EQUIVALENT UNIT
REAR
. ..
DISTRIBUTION
RECEPTACLE,
60-HZ 50-AMP 115-VOLT
60-HZ 30-AMP
NEMA 5-50
PROVIDED
POWER
PANEL CUSTOMERPOWER. ..
CORD
10 FEET6 AWG
60-HZ 50-AMP
SERVICECONDUCTOR
10 AWGTO
APPROVED
GROUND
(SEE NOTE)
115-VOLT
60-HZ 30-AMP
TELEPHONE COMPANY OWNED PROTECTOR GROUND BLOCK 
AT THE BUILDING ENTRANCE FACILITY
UNIT
REAR DISTRIBUTIONGROUND BLOCK
COUPLED
BONDING 6 AWG
SINGLE-POINT
POWER
TO APPROVED FRONT
POWERFRONT
NOTE:GROUND BLOCK
NETWORK CABINETPROCESSOR PORT
NETWORK CABINETEXPANSION PORT
TO AUXILIARY
CABINET
COUPLED
BONDING
CONDUCTOR10 AWG
GROUND
(SEE NOTE)
6 AWG
USE APPROVED GROUND LOCATED NEAREST THE REMOTELY
LOCATED
POWER PANEL
SINGLE-
POINT
GROUND
BLOCK
CUSTOMER
PROVIDED SERVICE
OR L6-30R
OR 208-VOLT OR 208-VOLT
POWER
CORD
10 FEET
FIGURE 16.  Typical Multi-Carrier AC Power and Grounding (Remote EPN)
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							POWER AND GROUNDINGaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaa
Single-Carrier Cabinet System
Each cabinet requires a separate power outlet, as shown in Figures 17 and 18.  These outlets
must not be shared with other equipment, must not be under switch control, and should be
located outside the cross-connect field area, if possible.  Any available power source can be used
as long as the phase or leg provides 120-volt AC at the required drain.
The Manager I terminal or G3r-MT should be connected to the ``Administration Terminal power
outlet, as shown in Figures 17 and 18.
A system cabinet is UL-listed at 10 amperes, 120 volts, or 1200 watts per cabinet.  Therefore, the
power required for a two-cabinet system is 2400 watts, the power required for a three-cabinet
system is 3600 watts, and the power required for a four-cabinet system is 4800 watts.
20-AMP
CABINET A
OR
CABINET A
15-AMPCABINET B 2 CABINET SYSTEM
TERMINAL
15-AMPCABINET B
20-AMP
CABINET A
15-AMP3 CABINET SYSTEM
CABINET B
CABINET C
OR
CABINET A
15-AMP
15-AMPCABINET B
15-AMPCABINET C
20-AMP
CABINET B
4 CABINET SYSTEM
CABINET A
20-AMP
CABINET C
CABINET D
20-AMP
CABINET A
15-AMP
15-AMPCABINET B
OR
CABINET C
CABINET D
TERMINALTERMINAL
TERMINALTERMINAL
TERMINAL ADMINISTRATION ADMINISTRATIONADMINISTRATION
ADMINISTRATIONADMINISTRATION
ADMINISTRATION
FIGURE 17.  AC Power Requirements for a Single-Carrier Cabinet System
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							aaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaPOWER AND GROUNDING
20-AMP
CABINET B
CABINET A
CABINET C
CABINET D
CABINET A OR
MANAGER I
TERMINAL
MANAGER I 20-AMP20-AMPCABINET A
OR
CABINET A
15-AMPCABINET B 2 CABINET SYSTEM
15-AMPCABINET B
4 CABINET SYSTEM
20-AMP
15-AMP
15-AMPCABINET BCABINET C
CABINET D
TERMINAL EXPANSION PORT
NETWORK (EPN)PROCESSOR PORT
NETWORK (PPN)
FIGURE 18.  AC Power Requirements for a Single-Carrier System (Remotely Located EPN)
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							POWER AND GROUNDINGaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaa
Figure 19 depicts a typical power and grounding layout for a single-carrier system with the PPN
and EPN cabinets colocated.  A ground wire from the ground block on the bottom cabinet of the
EPN connects to the single-point ground block on the bottom cabinet of the PPN.  A 6-AWG
ground wire connects the single-point ground block to an approved ground.  (Also see ``Ground-
ing, later in this section).
6 AWG
GROUND
APPROVED POWER
CORD
10 FEETREAR
6 AWG
115-VOLT
60-HZ
TERMINAL
NOTE:
POWER
CORD
10 FEET
115-VOLT
60-HZCOUPLED
BONDING
CONDUCTOR 10 AWG
WIRE TO
COUPLED
BONDING
CONDUCTOR 10 AWG
20 AMP
SERVICE 15 OR
20 AMP
SERVICE 15 OR
MANAGER
I
(SEE NOTE)(SEE NOTE)
GROUND
(SEE NOTE) OFF
ON
OFF
ONSINGLE-POINT
GROUND BLOCKCIRCUIT
BREAKER
CIRCUIT
BREAKERPOWER
SUPPLY15-AMP
PLUG
OFF
ONOFF
ONPOWER
SUPPLY PROCESSOR PORT NETWORK
CONTROL CABINET A
15-AMP
PLUG
REAR
CONTROL CABINET A EXPANSION PORT NETWORK
TO APPROVED GROUND LOCATED NEAREST THE TELEPHONE COMPANY OWNED
PROTECTOR GROUND BLOCK AT THE BUILDING ENTRANCE FACILITYNEMA 5-15 OR
NEMA 5-20
RECEPTACLE,
OR EQUIVALENT
FIGURE 19.  Typical Single-Carrier Power and Grounding Layout (EPN Colocated)
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							aaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaPOWER AND GROUNDING
Figure 20 shows a typical power and grounding arrangement for a system  with the EPN remotely
located.  A ground wire must be connected from the cabinet ground block of both the PPN and
EPN to an approved ground.  (Also see ``Grounding, later in this section).
6 AWG
GROUND
APPROVED POWER
CORD
10 FEETREAR
115-VOLT
60-HZ
TERMINAL
NOTE:
TO APPROVED GROUND LOCATED
NEAREST THE TELEPHONE COMPANY
OWNED PROTECTOR GROUND BLOCK
AT THE BUILDING ENTRANCE FACILITY
POWER
CORD
10 FEET
115-VOLT
60-HZ
COUPLED
BONDING
CONDUCTOR 10 AWGWIRE TOCOUPLED
BONDING
CONDUCTOR 10 AWG
20 AMP
SERVICE 15 OR
20 AMP
SERVICE 15 OR
MANAGER
I NEMA 5-15 OR NEMA 5-20
(SEE NOTE)(SEE NOTE) GROUND
(SEE NOTE) OFF
ON
OFF
ONSINGLE-POINT
GROUND BLOCKCIRCUIT
BREAKER
CIRCUIT
BREAKERPOWER
SUPPLY15-AMP
PLUG
OFF
ONOFF
ONPOWER
SUPPLY PROCESSOR PORT NETWORK
CONTROL CABINET A
15-AMP
PLUG
REAR
CONTROL CABINET A EXPANSION PORT NETWORK
RECEPTACLE, OR EQUIVALENT
6 AWG
GROUND
APPROVED WIRE TO
GROUND
(SEE NOTE)
FIGURE 20.  Typical Single-Carrier AC Power and Grounding Layout (Remotely Located EPN)
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							POWER AND GROUNDINGaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaa
DC Power Requirements
Multi-Carrier Cabinet System
A DC power plant may be used to power the multi-carrier system  cabinets. Figure 21 shows a
typical power and grounding layout for a DC-powered multi-carrier cabinet.
GROUND
DISCHARGE
BARAPPROVED
GROUND
(SEE NOTE)
NOTE:
10 AWG
COUPLED
BONDING
CONDUCTOR
(CBC)
REAR
-48 V
BATTERY PLANT
REAR
CABINET
GROUND
BLOCK
SYSTEM
SINGLE
POINT
GROUND
UNIT DISTRIBUTIONFRONT EXPANSION PORT
-48 V-48 V RTN
UNIT DISTRIBUTIONFRONT
-48 V-48 V RTN
NETWORK (EPN) CABINETPROCESSOR PORT
NETWORK (PPN) CABINET
1 GAUGE UP
TO 50 FEET
OR ENGINEERED
THAN 1%
VOLTAGE DROP FOR LESS DC POWERDC POWER
USE APPROVED GROUND LOCATED NEAREST THE TELEPHONE
COMPANY OWNED PROTECTOR GROUND BLOCK AT THE
BUILDING ENTRANCE FACILITY(75A(75A
CABINET
GROUND
BLOCK
FIGURE 21.  Typical Multi-Carrier Cabinet System DC Power and Grounding Layout
(EPN Colocated)
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							aaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaPOWER AND GROUNDING
Table Q provides the requirements for input DC power.
TABLE Q.  -48 Volt DC Input Power Requirements
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Parameter Requirements
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Static Voltage -48 V DC nominal, -42.5 V DC minimum, -52.5 V DC maximum
(measured at input to system cabinet)
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Dynamic Voltage Transient change in voltage (+/- 5% of steady state voltage)
Allowed transient duration (up to 200 milliseconds)
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AC Ripple Voltage Maximum wideband AC ripple (450 mvpp in the 3 kHZ-to-20 MHZ
band)
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Low Voltage Disconnect Automatic disconnect occurs when input voltage becomes less than
-42.5 V DC (control provided with battery plant).
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Overvoltage Protection Input voltage shall not exceed -52.5 V DC.
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Voltage Drop Maximum drop must not exceed 0.5 V DC one-way on feeder cable
between the power board and the system cabinet.
Feeders must be UL approved and CSA certified.
Feeder gauge must be no smaller than 6 AWG and no larger than
1/0 gauge.
Recommended -48 V DC feeder cableÐ
Royal Electric #4905 or
equivalent
1-AWG is required for distances up to 50 feet.
Cable resistance must be equal to or less than 0.1290 ohms per
1000 feet.
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Current Draw The battery plant rectifiers must be capable of providing current for
the system, including current required for system holdover and for
charging the batteries. In addition, this may include DC current
required for an inverter that provides AC power to peripheral equip-
ment, if it is installed, and for future growth.
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Circuit Breaker A UL-listed and CSA-certified circuit breaker must be provided at the
battery plant power board for each system cabinet feeder.
The recommended circuit breakers are 
75 ampere Airpax UPLI-1-
REC2-52-753 or Heinemann AM1-B2-A-75-2
.
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							POWER AND GROUNDINGaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaa
TABLE Q (continued).
-48 Volt DC Input Power Requirements
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Parameter Requirements
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Redundancy Redundancy of the battery chargers/rectifiers should be considered.
This would also provide the additional current necessary to recharge
the batteries after being fully discharged.
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Electrical Noise Voice band noise from the battery plant to the system must be less
than 32dBmC.
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Grounding A single point ground must be maintained.
A ground conductor must be installed from the isolated Ground
Discharge Bar* to the closest Approved Ground via the shortest
route as required by the NEC/REC.  The gauge must be no smaller
than the largest conductor in the system and larger than 6 AWG.
The Ground Discharge Bar shall not be connected electrically to the
chassis of the battery plant chargers, power board, or inverter(s).
All output power shall be isolated from the input power.
bbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbb
Lightning Protection There must be adequate lightning protection in the battery plant to
ensure that the system will not be damaged.
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As shown in Figure 21, the size of the wire required for the -48 V DC and -48 V return must be
engineered so that 
the -48 V DC supplied by the battery plant to the G1 cabinets will be
maintained between -42.5 and -52.5 V DC at all times 
to ensure proper operation and to
prevent hardware damage.
aaaaaaaaaaaaaaaaaaa
* Refer to 
DEFINITYÒCommunications System  Generic 1 and Generic 3ÐInstallation and Test, 555-230-104, for parts
and location information.
124 
						

							aaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaPOWER AND GROUNDING
Figures 17 and 18 provide a power and grounding layout for mixed AC-/DC-powered multi-carrier
cabinet configurations.
GROUND
BARDISCHARGE
REAR
TELEPHONE COMPANY OWNED PROTECTOR GROUND BLOCK 
-48 V
BATTERY PLANT
CABINET
GROUND
BLOCK
CABINET
APPROVED
GROUND
(SEE NOTE)6 AWG
10 AWG
COUPLED
BONDING
CONDUCTOR
(CBC) GROUND
BLOCK
USE APPROVED GROUND LOCATED NEAREST THE 
-48 V-48 V RTN 
PROVIDED
POWER
PANEL OR EQUIVALENT
CUSTOMERUNIT
REAR
. ..60-HZ 50-AMP DISTRIBUTION
NOTE:
AC
POWER
CORD
10 FEET
CABINET
115-VOLT NEMA 5-50
OR
SERVICE 60-HZ 30-AMP
AT THE BUILDING ENTRANCE FACILITYFRONT
NETWORK CABINETEXPANSION PORT
FRONTPROCESSOR PORT
NETWORK (PPN) CABINET
DC POWER DISTRIBUTION UNIT
AC POWER
(75A
OR L6-30R
RECEPTACLE, 1 GAUGE UP
ENGINEERED
FOR LESS
THAN 1%
VOLTAGE DROP TO 50 FEET OR
OR 208-VOLT
TO AUXILIARY
GROUND BLOCK
FIGURE 22.  Typical Multi-Carrier Mixed AC/DC Power and Grounding Layout (EPN Colocated)
125 
						

							POWER AND GROUNDINGaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaa
USE APPROVED GROUND LOCATED NEAREST THE 
GROUND
BATTERY PLANT
APPROVED
GROUND
(SEE NOTE)
DISCHARGE
10 AWG
COUPLED
BONDING
CONDUCTOR
(CBC)CUSTOMER
. ..60-HZ 50-AMP RECEPTACLE,
AC
POWER
CORD
10 FEET
OR 
EQUIVALENT115-VOLT NEMA 5-50
L6-30R
PROVIDED
POWERCOUPLED
BONDING
6 AWGCONDUCTOR 
10 AWG
OR
208-VOLT
60-HZ 30-AMP
SERVICE REAR
CABINET
GROUND
BLOCKOR
PANEL
TELEPHONE COMPANY OWNED PROTECTOR GROUND BLOCK 
AT THE BUILDING ENTRANCE FACILITYFRONT
NOTE:EXPANSION PORT
REARFRONT
PROCESSOR PORT
NETWORK (PPN) CABINET
1 GAUGE UP
TO 50 FEET OR
-48 V-48 V RTN 
-48 VBAR
TO 
AUXILIARY
CABINET
GROUND
BLOCK DISTRIBUTION UNITDC POWER 
AC POWER
DISTRIBUTION
UNIT
SINGLE
POINT
CABINET
GROUND
6 AWG
TO
APPROVED
GROUND
(SEE NOTE) NETWORK (EPN) CABINET
(75A
ENGINEERED FOR
LESS THAN 1%
VOLTAGE DROP
FIGURE 23.  Typical Multi-Carrier Mixed AC/DC Power and Grounding Layout
(Remotely Located EPN)
For DC-powered systems,  a ground wire must be installed from the isolated Ground Discharge
Bar on the battery plant to the Approved Ground.  (See ``Grounding.)  The size of the wire must
be no smaller than the largest wire in the system and 
must be larger than 6 AWG.  The approved
ground connection must be identified with a Form 15657NR or equivalent grounding tag.  The
Ground Discharge Bar shall not be connected electrically to the chassis of the chargers, power
board, or inverters.  All output power must be isolated from the input power.
A 6-AWG ground wire must be connected to the ground block in the bottom of each cabinet
(Figure 21).  The ground wire is routed out of the cabinet and terminated on the battery plant.
126