## [PART III -- SECTION J]{.underline}

## [ATTACHMENT J.1]{.underline}

## 

## 

## DIRECT CURRENT BACK-UP SYSTEM Specification (DC BUS SPEC)

**Performance Goals**

**and**

**Operating Characteristics**

**Version 6**

**7/19/07**

**Part 1 General**

**1.0 DC BUS Definition:**

The system shall continuously supply regulated Direct Current (DC) power
to loads and shall be capable of providing power during loss or
interruption of input Alternating Current (AC) by using energy stored in
a battery bank. The DC Back-Up System (DC BUS) shall be capable of
suppressing transient voltage conditions. Input power will be AC, single
phase 240 volt and 208 volt, supplied by the electric utility. The DC
BUS system shall consist of redundant rectifier modules, 24 volt DC, 100
amp output resulting in a 24V, 200 Amp system. The DC BUS shall include:
rectifier with internal automatic transfer capability; control
circuitry; 1000 VA, 120 volt AC inverter, with bypass; and optional DC
converter(s).

**1.1 Major Component List:**

The DC BUS System provided under this contract shall consist of
Commercial-off-the-Shelf/Non-Developmental Item (COTS/NDI) equipment and
must contain the following features.

a.  Rectifiers, 2 ea., each powered from separate AC circuits

b.  Distribution Cabinet

c.  Distribution Panel(s)

d.  Inverter, 2ea.

e.  Remote monitoring capability

f.  Control panel

g.  AC wireway

h.  DC wireway

i.  Battery shunt

j.  Main system bus

k.  Battery disconnect panel

l.  Low Voltage Disconnect Contactor

m.  Battery. Valve Regulated Lead Acid (VRLA) battery, capacity 530 --
    2100 Amp hours.

1.2 Optional Lowest Replaceable Unit (LRU) Component List

a.  Rectifier

b.  Inverter

c.  Converters

d.  Distribution panel.

**1.3 Environmental requirements:**

1.3.1 Storage ambient temperature: -20°C (-4°F) to 70°C (158°F)

1.3.2 Operating ambient temperature DC BUS unit: 0°C (32°F) to 40°C
(104°F)

1.3.3 Operating ambient temperature batteries: 15°C (59°F) to 27°C
(80°F)

1.3.4 Relative humidity: 5 to 95%, non-condensing.

1.3.5 Altitude: The DC BUS shall operate at all altitudes between 0 and
3,300 feet without de-rating performance. The contractor shall provide
de-rating data for operation between 3,300 and 10,000 feet in 1000-foot
increments.

**1.4 Maintenance and Safety Procedures:**

1.4.1 The vendor shall identify and recommend system maintenance
procedures.

1.4.2 The vendor shall identify and recommend effective protection from
thermal, chemical, biological, toxicological, radiological, mechanical,
electrical, electromagnetic, pyrotechnic, optical, and other hazards.

1.4.3 The vendor shall recommend personnel protective equipment where
potential hazards to life or health necessitate protection.

**Part 2 Equipment Characteristics and Performance**

2.0 General: DC BUS, a 24 volt DC system, shall have dual redundant
rectifier modules of on-line technology that meets the stated
performance requirements. The DC BUS system control shall provide
synchronization control circuits, connection control circuits,
disconnection control circuits, system instrumentation, system status
indicators, system alarms and system diagnostic for Remote Maintenance
Monitoring and battery monitoring.

2.1 DC BUS System Performance Ratings: The DC BUS shall supply fully
conditioned and continuous power during normal operations. The DC BUS
shall also be capable of providing continuous rated power during loss or
interruption of input AC power by using DC power stored in the battery
bank. And, automatically transfer back to utility power when the AC
source is within the system's rating or limits. Under specified
conditions, external or internal failures and normal switching, the DC
BUS shall: automatically, within 8 ms or less, transfer the load from
one rectified module to the other; and, automatic bypass from DC BUS
input distribution cabinet to inverter output, that switches AC load
within 8 ms.

2.2 DC BUS continuous output capacity rating: The vendor shall offer a
DC BUS system capable of 24 volt DC 200 amp output.

2.3 DC BUS Battery Capacity: The vendor shall offer 24 volt battery
options from 500 to 2100 amp hour rating.

**2.4 Electrical Input Requirements.**

2.4.1 Rectifier/Charger. Redundant units, minimum two per DC BUS, with
automatic switching of load from one rectifier to the other rectifier,
within 10 ms, in event of rectifier failure. Rectifiers may
automatically share the load during normal operation. The DC BUS shall
have separate AC power input feeds for each rectifier/charger.

2.4.2 Rectifier/Charger electrical input requirements input voltage:
Single-phase: 208 volt, line-to-line, and 240 volt Line-to-Line, without
adjustments.

2.4.2.1 Input voltage range: +10%, -15% steady state.

2.4.2.2 Input frequency: 60 hz +/-5%.

2.4.2.3 Input Power Factor (PF): (ratio of kW to kVA) Power Factor
values, between 30% load and 80% load, shall remain between 0.90 lagging
and unity. Load is full rated capacity of the DC BUS.

2.4.2.4 Input Total Harmonic Distortion (THD), Current: THD values
between 30% and 80% load shall not exceed 10%. Load is full rated
capacity of the DC BUS.

2.4.2.5 Inrush current: Inrush current values shall not exceed these
values at these specific times:

a.  At 0.01 second, 8-times the steady state rating of the unit. Peak
    current measurement.

b.  At 0.1 second, 3-times the steady state rating of the unit. RMS
    current measurement

c.  And at 1 second, steady state. RMS current measurement.

Vender shall provide actual inrush current values of DC BUS units
proposed under this contract.

**2.5 Electrical Output Requirements.**

**2.5.1 Rectifier/Charger Output Requirements.**

2.5.1.1 Output voltage: 24 volts DC. Adjustable output voltage between
23 and 28 volts DC, 0.1V increments. Steady state output voltage limits
±0.5%

2.5.1.2 Output Current: 100 amp .

2.5.1.3 Output Voltage Transient Recovery: Maximum Voltage Transient
shall not exceed

a\. +/- 3% nominal voltage for a 50% load step.

b\. +/- 5% nominal voltage for a 100% load step.

Output voltage shall fully recover to nominal voltage limits within 16.7
milliseconds or less.

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2.5.1.4 Output Overload Current at Full Output Voltage Capability:

a\. 125% for 10 minutes in normal operation, +/- 7% of set voltage.

b\. 150% for 60 seconds in normal operation, +/- 10% of set voltage.

c\. 167% of full load current for 3-seconds, +/- 10% of set voltage.

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2.5.1.5 Current Limit: 105% full load current if bypass is not
available.

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2.5.1.6 Fault Clearing of at least 300% but not more than 500% of normal
full load current.

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2.5.1.7 AC to DC Efficiency: The minimum DC BUS AC to DC rectification
efficiency at rated input and output voltage is 88%, at 100% linear
load, nominal input voltage, with batteries fully charged.

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2.5.1.9 DC ripple voltage (AC ripple riding on DC output). System noise
is limited to requirements listed in paragraph 2.7.3.2.4 of this
specification. This DC ripple is measured with batteries connected.

2.5.1.10 Battery Charging

2.5.1.10.1 Temperature compensated battery charging.

2..5.1.10.2 Nominal Float voltage and Equalized voltage adjustable
within rectifier limits.

**2.5.2 Inverter (24 volts DC to 120 volts AC) Output Requirements.**

2.5.2.1 Output voltage: Single-phase - 120 volt two wire plus equipment
ground.

2.5.2.2 Output Power -- 1000VA.

2.5.2.3 Output voltage regulation Steady State: 5%.

2.5.2.4 Output Frequency:

a.  Frequency 60 Hz +/- .1 Hz

2.5.2.5 Output Voltage Waveshape: Quasi-sine wave or Stepped
approximation to sine wave, Crest Factor between 1.35 and 1.45.

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2.5.2.6 Output Voltage Transient Recovery: Maximum Voltage Transient
shall not exceed

> a\. +/- 3% nominal voltage for a 50% load step.
>
> b\. +/- 5% nominal voltage for a 100% load step.

Output voltage shall recover to nominal voltage regulation limits within
16.7 milliseconds or less.

2.5.2.7 Output Overload Current at Full Output Voltage Capability:

> a\. 125% for 10 minutes in normal operation, +/- 7% of set voltage..
>
> b\. 150% for 60 seconds in normal operation, +/- 10% of set voltage.
>
> c\. 167% of full load current for 3-seconds, +/- 10% of set voltage.

2.5.2.7.1 Current Limit: 100% full load.

2.5.2.7.2 Fault Clearing: Sub-cycle current of at least 300% but not
more than 500% of normal full load current.

2.5.2.8 Bypass. The DC BUS shall be equipped with a bypass around the
inverter(s) and rectifier, connected to DC BUS distribution cabinet and
to the output of the inverter(s), that will automatically switch in 8 ms
or less.

2.5.2.9 AC Noise reflected by Inverter. (AC noise or ripple reflected
back on 24 volt DC bus by the inverter). System noise is limited to
requirements listed in paragraph 2.7.3.2.4 of this specification. This
DC ripple is measured with batteries connected, and two inverters in DC
BUS system.

2.5.2.10 AC Noise on inverter(s) AC output. System noise is limited to
requirements listed in

paragraph 2.7.3.2.4 of this specification.

**2.5.3 Converter output (DC to DC) Requirements.**

2.5.3.1 Input/output voltage.

> a\. +24V to --48V
>
> b\. +24V to 12V
>
> c\. +24V to --24V

2.5.3.2 Output Power -- 5 amps.

2.5.3.3 Noise reflected by converter(s). (AC noise or ripple reflected
back on 24 volt DC bus by the converter(s). System noise is limited to
requirements listed in paragraph 2.7.3.4 of this specification. This DC
ripple is measured with batteries connected and three converters: +24V
to -48V; +24 to 12V; and +24V to -24V.

2.5.3.4 Noise on inverter(s) AC output. System noise is limited to
requirements listed in

paragraph 2.7.3.4 of this specification.

**2.6 System Operation, Normal System Operation:** The battery unit
shall not be required to assume any portion of a step load in normal
operation. The DC BUS shall continue to function in the normal mode of
operation with or without a DC source.

2.6.1 Normal Mode: During normal operation the DC BUS shall be used to
provide precise regulated and transient free power to the electronic
equipment load. The primary AC source shall be used to supply power to
the rectifier charger. The rectifier charger shall provide regulated DC
power to support the load, inverter(s), converter(s) and simultaneously
maintain the battery in a fully charged condition.

2.6.2 Emergency Mode: Upon failure of the primary AC power, input power
for the load, inverter, or converter shall automatically be supplied
from the battery. When normal power is restored, input power for the
loads and for recharging the battery shall automatically be supplied
from the rectifier charger. If the input AC power does not return, the
DC BUS shall automatically shut down in an orderly manner when the
discharge limit of the battery is reached.

2.6.3 Downgrade Mode: If the battery must be taken out of service for
any reason, it shall be disconnected from the rectifier charger and
inverter by means of a circuit breaker. The DC BUS shall continue to
function and meet the performance criteria specified except for the
battery protection time specified.

**2.7 DC BUS Module Design**

2.7.1 Reliability: The documented reliability of each DC BUS, defined as
input to the rectifier and output of rectifier, shall not be less than
150,000 hours mean time between failures (MTBF). The above figure should
be substantiated by documented analysis and calculated based on MIL-STD
217 and IEEE STD 493-1990.

2.7.2 Maintainability: Modular sub-assembles: for ease of maintenance
and service, the DC BUS must have field replaceable modular
sub-assemblies serviceable from the cabinet front panel. The DC BUS
system shall not require periodic maintenance or inspections more than
four times each year. No visit for routine or periodic maintenance shall
require more than 4 staff-hours for the quarterly visit.

2.7.2.1 Malfunction diagnosis

> a\. The DC BUS shall have self-diagnostic capabilities to determine
> malfunctions and failures to the line replaceable unit (LRU) level,
> except individual batteries.
>
> b\. Malfunctioning LRUs shall be correctly identified 90% of all
> cases.
>
> c\. The remaining 10% of malfunctioning LRUs shall be isolated to not
> more than three possible LRUs.
>
> d\. Local alarms shall be supplied to provide maintenance personnel
> with information regarding the reason for the shutdown or incipient
> failure.
>
> e\. This same information shall be capable of being transmitted to an
> interface with remote capabilities.
>
> f\. Visual and audible indicators shall annunciate the malfunction of
> a protective device or circuit.
>
> g\. The indicators and manufacturer's instruction manuals shall be
> sufficient to enable FAA personnel to verify the existence and
> location of the fault or malfunction and determine the steps necessary
> to restore the DC BUS system to service.

2.7.2.2 Mean Time to Repair (MTTR):

The DC BUS shall be configured so that system restoration, following a
failure, can be accomplished by the replacement of a LRU(s). Mean time
to repair the DC BUS by replacement of an LRU following a failure shall
not exceed 30-minutes, assuming spare components, subassemblies and
experienced technician are available on site. MTTR is the mean time to
repair all of the removable items in a system for corrective
maintenance. MTTR is defined as beginning when the trained technician
arrives at the DC BUS location. It includes the total time required to
isolate and replace the defective LRU and return the DC BUS to normal
operation.

2.7.3 Grounding, Bonding, Shielding, and Surge Protection.

2.7.3.1 Input Surge Protection: DC BUS systems shall meet IEEE 587,
(ANSI Standard C62.41), Categories A & B (6kV).

2.7.3.2 EMI Suppression: Radiated and conducted EMI shall be suppressed
to ensure that computer systems, or other similar electronic systems
shall neither adversely affect the DC BUS system nor be adversely
affected by the DC BUS system.

2.7.3.2.1 DC BUS systems shall meet FCC regulation Part 15 Subpart B,
Class B.

2.7.3.2.2 The system will not be damaged, nor operate falsely, when
operated in the vicinity of a hand held radio transceiver, 5 Watts,
50-900 MHz range transmitting within two (2) feet of the equipment with
doors open and/or closed.

2.7.3.2.3 System shall neither interfere with nor have an adverse affect
on Amplitude Modulation (AM) radio equipment operating in the following
frequency ranges: VHF, 115 to 130 MHz; and UHF, 320 to 370 MHz.

2.7.3.4 System noise, as measured on the input or output conductors,
from output of rectifier(s) two each, inverter(s) two each or
converter(s) three each; or, AC reflected from inverter(s) and
converter(s) shall not exceed the following:

> a\. Frequencies from 1-100 MHz, less than 19 mV RMS; and
>
> b\. Frequencies from 1-100 MHz, less than 200 mV peak to peak.

2.7.3.3 Electrostatic Discharge: DC BUS systems shall withstand 25 kV
electrostatic discharge without damage or disturbance to the load.

2.7.4 Low battery voltage protection: To prevent total discharge of the
battery, the DC BUS shall automatically shut-down when the battery
voltage reaches a programmable minimum voltage level. If the shut-down
was caused by loss of AC input, then when power is restored normal
system operation automatically resumes.

**2.8 Display and Controls**

2.8.1 DC BUS Control Panel: The term DC BUS control panel denotes that
portion of the DC BUS containing the display panel and control
functions. Each DC BUS Unit shall be provided with a control section to
provide complete monitoring and control through the use of menu-prompted
commands. The monitor controller shall be:

-   Windows-based software

-   Open systems interface

-   RS232 and RS 485 Local communication ports

-   Remote monitoring capability

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-   Password protection for security

2.8.2 Manual Procedures: Start-up, and shutdown procedures shall be
detailed on the display panel in text and graphic form.

2.8.3 Metered Values: A microprocessor shall control the display and
memory functions of the monitoring system. All voltage and current
parameters shall be monitored using true RMS measurements for accurate
(+/- 1%) representation of non-sinusoidal wave forms typical of
computers and other sensitive loads. The following parameters shall be
monitored and displayed:

> 1\. DC BUS Rectifier:
>
> a\. Input voltage.
>
> b\. Input current.
>
> c\. Output voltage.
>
> d\. Output current.
>
> 2\. Battery
>
> a\. Battery voltage.
>
> b\. Battery charging/discharging current.
>
> c\. Time remaining on battery and battery time available
>
> 2.8.4 Alarms: Alarm conditions shall be reported at the DC BUS Module.
> The control panel shall report the alarms listed below. Each alarm
> shall be visually displayed in text form and an audible alarm will
> sound for each alarm. 1. DC BUS System Voltage
>
> 2\. DC BUS System Current
>
> 3\. AC Fail
>
> 4\. High Voltage
>
> 5\. Low Voltage.
>
> 6\. Extra Low Voltage
>
> 7\. Current limit
>
> 8\. Rectifier fail
>
> 9\. Inverter fail
>
> 10\. Converter fail
>
> 11\. Breaker fail
>
> 12\. Fuse fail
>
> 13\. Low Voltage Disconnect status
>
> 14\. Battery Discharge Time
>
> 15\. Battery Charge Current. Open/battery disconnected
>
> 16\. Circuit breakers throughout the DC BUS System shall be monitored.

2.8.5 Controls: Control functions shall be:

> 1\. Rectifier DC output voltage, adjust.
>
> 2\. Battery circuit breaker trip, push-button.
>
> 3\. Emergency shut down, push-button with protective cover.
>
> 4\. Audible alarm Off, push-button.
>
> 5\. Control Enable, push-button.
>
> 6\. Display control, push-button: Up, Down, Select.
>
> 7\. Alarm Reset, push-button.
>
> 8\. Output Trip, push-button.
>
> 9\. Reset system rectifiers.
>
> 10\. Volt ADJ.
>
> 11\. Alarm Thresholds.
>
> 12\. Rectifier on/off

2.8.6 Self-Diagnostics:

> 1\. History Status File: A history status file shall contain all of
> the information in the present status screens. The control system
> shall maintain this information in discreet 4 millisecond frames
> updating memory on a First-In/First-Out basis. This shall provide
> status recall of a period of at least 252 milliseconds (63 frames);
> 156 milliseconds before the malfunction fault (30 frames), the fault
> frame, and 92 milliseconds after the malfunction (23 frames). Each
> frame shall display four 1 millisecond time period slices with 1
> millisecond resolution for output voltage and current.
>
> 2\. Event History File: The control system shall maintain an event
> history of the alarm conditions that have occurred during system
> operation. System memory shall be capable of storing at least 128
> events for recall.

2.8.7 Monitoring Capability: DC BUS control circuits shall be capable of
interfacing with third party monitoring software, FAA's Environmental
Remote Monitoring (ERMS) via the RS232 or RS485 port in an open protocol
environment. Interface via communication ports shall be built into the
DC BUS or included with the DC BUS unit. Ethernet monitoring and direct
connect laptop/PC monitoring may use different communications ports,
therefore the DC BUS unit shall have both communication ports. The
site-monitoring signal processing module shall be built into the system
logic. The following shall be available for external monitoring:

> 1\. Metered Values, in paragraph 2.8.4, above.
>
> 2\. Alarms, in paragraph 2.8.5, above.

**2.9 DC BUS Rack/Cabinet, enclosure.**

2.9.1 Physical Characteristics

1.  Height - 7ft (84 inches)

2.  Width

    a.  Inside diameter -- 23 inches -- mounting hole centerline to
        centerline

    b.  Outside diameter 2 ft.sq. footprint

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3.  Material - Steel

4.  Rack Type - Channel rack

5.  Designed for Seismic Zone 4

6.  All equipment listed in paragraphs 2.9.2 through 2.9.7.4 must fit in
    one 23 inch rack.

7.  Underwriters Laboratory (UL) listed.

8.  Adequate workspace clearances, headroom, and illumination in
    accordance with OSHA 29 CFR 1910.303 and the NEC, and

9.  Design features to ensure efficiency, safety, and economy of
    maintenance in normal, and emergency environments.

2.9.2 Distribution Cabinet. Input to DC BUS

1.  Rack mounted.

2.  All breakers

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a.  Single pole (except main system breaker)

b.  DC rated

c.  No instantaneous trip

d.  Hydraulic-Magnetic

e.  Altitude (10,000 feet max) compensated

f.  Temperature compensated

g.  Alarming capability

> 3\. 400 A positive bus
>
> 4\. System shunt

a.  400 Amp

b.  50mV

2.9.3 AC Wireway

1.  Lugless wiring terminal strip.

2.  Terminal strip must accommodate #12 wires.

3.  All interconnect wiring between AC wireway and system components
    shall be performed by manufacturer.

4.  Pre-wire for 4 rectifiers and 2 inverters.

5.  All interconnecting system wiring must be properly sized IAW NEC
    standards.

2.9.4 DC Wire way

1.  Must meet same specifications as AC wireway.

2.  Must have an isolated ground return bus to accommodate all DC
    returns.

3.  Pre-wire according to \# of breakers on distribution panel(s).

4.  All interconnecting wiring must be stranded.

5.  Must have a ground bus, not a ground stud, to accommodate all
    returns.

2.9.5 Main System Bus

1.  Isolated 400A rated positive bus

2.  Isolated 400A rated negative bus

2.9.6 Distribution Panel(s). Output of rectifier to radios and other DC
loads.

1.  Rack mounted.

2.  Minimum 60 circuit breakers.

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a.  Fourty (40) 10 amp single pole circuit breakers.

b.  Two (2) 70 amp circuit breaker(s) for the inverter(s).

c.  Eighteen (18) additional 10 amp circuit breaker spaces.

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3.  All breakers

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a.  Single pole, DC-rated for radios.

b.  No instantaneous trip

c.  Hydraulic-Magnetic

d.  Altitude compensated

e.  Temperature compensated

f.  Alarming capability

> 4\. Interrupting rating:

a.  65V

b.  5000A

2.9.7 Low Voltage Disconnect (LVD)

1\. User settable voltage range between 18-24VDC, in 0.1V increments

2\. Monitor controlled

2.9.8 DC BUS Rectifiers, Inverters, Converters, and Monitoring/Control
panel.

2.9.8.1 Rectifier. Rack mounted. Input AC 240 or 208 volt, line-to-line,
single phase.

2.9.8.2 Inverter. Rack mounted 1000VA. Input 24 volts DC, output 120
volts AC.

2.9.8.3 Converters. Rack mounted, output 5 amps.

a.  +24V to --48V

b.  +24V to 12V

c.  +24V to --24V

2.9.8.4 Monitoring and Control panel. Rack mounted.

**2.10 Battery String.**

2.10.1 Battery Type. Valve Regulated Lead Acid (VRLA) with capacity
range from 500 to 2100 Amp-Hours, 24 volt, Zone 4 mounting design, with
20-year design life, front access terminal design; from one of the
following battery manufacturers.

1.  Exide/GNB, ABSOLYTE IIP;

2.  Deka, Unigy II;

3.  C&D Technologies, msEndur;

4.  Power Battery, CV Series

5.  Enersys, Powersafe OPzV

6.  SBS, VRZ Series

2.10.2 Physical Dimensions, maximum.

> a\. Depth 32-inches.
>
> b\. Length or Width 42-inches.
>
> c\. Height 60-inches.

2.10.3. VRLA batteries shall conform to the following criteria:

1.  Battery Runtime - 24 hrs, 36 hrs, and 72 hrs. Provide a table
    indicating cabinet/rack model number and runtime in hours for each
    DC BUS unit at 100% load.

2.  Current Discharge Ratings -- Each battery model shall have a chart
    indicating Amps to 1.75 Final Volts per cell @ 77°F for 24, 36 and
    72 hours.

3.  Warranty: 1-year and 5-year warranty including, parts, labor, and
    shipping.

4.  Case and Cover: Standard.

5.  Operating Temperature: Between 66^0^ F and 77^0^ F (19^0^ C and
    25^0^ C).

6.  Following shall be furnished with the VRLA battery string:

    a.  Batteries.

    b.  Battery rack/cabinet.

    c.  Inter-battery cables/connectors.

    d.  Tier-to-tier battery cables/connectors.

    e.  Battery to disconnect breaker cables/connectors.

    f.  Battery numbering.

    g.  DC Disconnect breaker.

    h.  Steel case construction.

    i.  Transparent shield, easily removed, covering battery terminals.

**2.11 Ancillary Equipment.**

2.11.1 Test and Maintenance Equipment

1.  Alber Cell Corder (CRT-400).

2.  Cannon 350A Amp Load Bank (L-24-350), with a battery quick
    disconnect comprised of one male and one female connector
    appropriately sized for the battery cable. Use Anderson Power
    Products SB350 Series connectors, or equivalent.

3.  Fluke 189 Digital Volt-Ohm Meter.

4.  Fluke 66 Infrared Thermometer, w/NIST/DKD

2.11.2 Tool Kit. DC BUS and Battery Maintenance tool kit. Insulated tool
kit recommended by the vendor for maintenance of the DC BUS and DC BUS
batteries. An example of the type tool kit needed is the Cementex,
TCK-101 M/S, with metric sockets. The tool kit should contain tools of
the non-sparking type equipped with handles listed as insulated for the
maximum working voltage; battery venting tool; and non-metallic
flashlight for use in explosive gas environments.

2.11.4 Battery Maintenance Lift. Foot operated hydraulic pump platform
lift. Steel construction, two lift capacities.

1.  Light-Duty Lift. Two wheeled lift with: minimum lift height of
    54-inches; platform dimensions approximately 20-inches by 22-inches;
    400 pound lift capacity; unit weight approximately 69 pounds. WESCO
    model number MPL-54-2022 or equivalent.

2.  Medium-Duty Lift. Four wheeled lift with: minimum lift height of
    54-inches; platform dimensions approximately 22-inches by 22-inches;
    750 pound lift capacity; unit weight approximately 162 pounds. WESCO
    model number DPL-54-2222 or equivalent

**Part 3 Equipment Start-up and Testing**

**3.1 DC BUS Start-Up Service.** The DC BUS vendor provides start-up
service. The installation contractor is responsible for providing all
labor and material to commission the DC BUS system. The start-up
service, at a minimum, shall do the following tasks.

1.  Record DC BUS unit make/model and serial number for factory warranty
    documentation.

2.  Validate the installation integrity of the DC BUS unit and battery
    electrical connections.

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a.  Check facility panel DC BUS circuit breakers;

b.  Check Distribution panel main breaker;

c.  Check Load bank connections; and

d.  Check DC BUS input and output power connections.

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3.  Perform a full mechanical inspection of the unit.

4.  Start DC BUS unit.

5.  Configure DC BUS unit's programmable settings.

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a.  Reset or verify correct factory programmed settings;

b.  Set proper battery charge and float voltages; and

c.  Record all DC BUS parameter settings and give this document to FAA.

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6.  Verify that all operating and monitoring parameters are functioning.

7.  Perform a 6-hr load (capacity) test on the batteries and record the
    data per the attached "Battery Load Test and Data Sheet for DC Bus
    Start-Up Services" file.

8.  Provide at least two (2) hours of operator training.

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a.  Instruct on use of DC BUS control panel and laptop/PC connection and
    screen menu;

b.  Remove DC BUS from critical load for a minimum of 30 minutes without
    power interruption, using the manual maintenance bypass cabinet.