Best Unity/I UT340 User manual

U N I T Y / I™
Three-Phase Uninterruptible Power Systems
UT340, UT360, UT380, UT3100
60 Hz
Plannin
g
and
Installation Manual
LTM-0357A
Copyright 1995, Best Power Technology, Inc.

UT340, UT360, UT380, and UT3100
Planning and Installation Manual
IMPORTANT SAFETY INSTRUCTIONS
SAVE THESE INSTRUCTIONS
This manual contains important instructions for your UNITY/I™UPS.
The installation and use of this product must comply with all national, federal, state, municipal,
or local codes that apply. If you need help, please call BEST’s Technical Support Center at
1-800-356-5737 (U.S.A. or Canada; elsewhere, call your local BEST office).
WARNING!
UPS units contain hazardous AC and DC voltages. A qualified electrician must install the
UPS, AC line service, and external batteries according to local and national codes and must
be familiar with batteries and battery installation.
Before installing, maintaining, or servicing the UPS, shut off the UPS and disconnect all
sources of AC and DC power.
Whenever AC and/or DC voltage is applied, there may be AC voltage at the UPS output;
this is true because the UPS can supply output power from mains or from its batteries. To
avoid equipment damage or personal injury, always assume that there may be voltage at the
UPS output.
TEST BEFORE TOUCHING!
To reduce the risk of fire or electric shock, install the UPS and external batteries in a
temperature and humidity controlled indoor area, free of conductive contaminants.
UPS batteries are high current sources. Shorting battery terminals or DC terminal strips can
cause severe arcing, equipment damage and injury. A short circuit can cause a battery to
explode. Always wear protective clothing and eye protection and use insulated tools when
working near batteries.
This unit contains components that are sensitive to electrostatic discharge (ESD).
If you do not follow proper ESD procedures, you may cause severe damage to
electronic components.

UT340, UT360, UT380, and UT3100
Planning and Installation Manual
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Table of Contents
ListofTablesand Figures...............................................ii
100: Introduction...........................................................1
101: UPS Footprint.....................................................2
102: Specifications for the UT340 and UT360................................3
103: Specifications for the UT380 and UT3100...............................5
104: Receiving and Moving the UPS.......................................7
105: Storing the UPS and Batteries........................................8
106: Finding a Location for the UPS.......................................8
107: Technical Support..................................................9
200: Installation............................................................9
201: Installing the Maintenance Bypass Cabinet (MBC) and UPS...............10
202: Installing the External Batteries and DC Disconnect (DCD)................18
300: Initial Startup and Phase Check..........................................22
301: Initial Startup and Phase Check
forUnitswithaBEST-SuppliedRotarySwitchMBC.....................23
302: Initial Startup and Phase Check
forUnitswithaBEST-SuppliedThree-BreakerMBC.....................26
400: Clearing the Events Log................................................29
500: Shutdown Procedures..................................................29
501: Shutdown Procedure for Units with a BEST-Supplied RotarySwitch MBC....30
502: Shutdown Procedure for Units with a BEST-Supplied Three-Breaker MBC...30
600: Startup from Maintenance Bypass........................................31
601: Startup from Maintenance Bypass with a BEST-Supplied RotarySwitch MBC.31
602: Startup from Maintenance Bypass with a BEST-Supplied Three-Breaker MBC.32
700: Glossaryof Terms and Abbreviations......................................33
701: Glossaryof Terms.................................................33
702: Abbreviations....................................................34

UT340, UT360, UT380, and UT3100
Planning and Installation Manual
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List of Tables and Figures
Tables
1AC Input Specifications, UT340 and UT360.....................................3
2AC Output Specifications, UT340 and UT360...................................3
3DC Input/BatterySpecifications, UT340 and UT360..............................4
4General Specifications, UT340 and UT360......................................4
5AC Input Specifications, UT380 and UT3100....................................5
6AC Output Specifications, UT380 and UT3100..................................5
7DC Input/BatterySpecifications, UT380 and UT3100.............................6
8General Specifications, UT380 and UT3100.....................................6
Figures
1Footprint of the UT340, UT360, UT380, UT3100
with Conduit Connection Kit (Top View)...................................2
2FrontView(CoversRemoved)..............................................11
3UT340 - UT3100 Installation Wiring Diagram,
TypicalInstallation WithNoMaintenance Bypass Cabinet.....................12
4UT340 and UT360 Installation Wiring Diagram, Typical Installation................13
5UT380 and UT3100 Installation Wiring Diagram, Typical Installation...............14
6ExternalConnection Board.................................................15
7Communication Interface Board (Option)......................................16
8RelayBoard(Option)......................................................17

UT340, UT360, UT380, and UT3100
Planning and Installation Manual
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Section 100: Introduction
An uninterruptible power system (UPS) protects sensitive equipment against unacceptable
disturbances from the mains (AC line) supply. The UNITY/I™three-phase UPS has the capacity
to serve a wide variety of electrical equipment— from mainframe computers to enterprise-wide
EDP installations to production lines. The UNITY/I three-phase UPS provides true on-line,
single-conversion technology and harmonics isolation.
Only a qualified electrician should install this unit. The planning and installation manual gives
the electrician guidelines for:
installation wiring.
external battery installation.
UPS startup procedures.
phase check for the maintenance bypass cabinet (MBC).
UPS shutdown procedures.
If you need assistance, please have the UPS model number and serial number available and call
BEST’s Technical Support Center at 1-800-356-5737 (U.S.A. or Canada) or call your local
BEST office.

UT340, UT360, UT380, and UT3100
Planning and Installation Manual
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CABLE ENTRY
CONDUIT
CONNECTION
BOX
101 UPS Footprint
Figure 1: Footprint of the UT340, UT360, UT380, UT3100
with Conduit Connection Kit (Top View)
Inches Millimeters Allow a minimum of 3 feet (914 mm) at the front of the
unit, 3 feet (914 mm) at the top of the unit, and 6 inches
(152 mm) at the back of the unit for service clearance
and for air flow.
Cable entry from bottom only.
The conduit connection kit includes a conduit connection
box and three pedestals, shipped separately. See
installation instructions shipped with kit.
A39.4 1000
B17.9 455
C19.8 504
D27.9 708
E31.7 804
F2.4 60

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Planning and Installation Manual
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102 Specifications for the UT340 and UT360
Tables 1 - 4 contain specifications for UPS models UT340 and UT360.
Table 1: AC Input Specifications, UT340 and UT360
UT340 UT360
Voltage3 x 208Y/120 3 x 480Y/277 3 x 208Y/120 3 x 480Y/277
Rated input current -Amps 146 63 219 95
Mains tolerance % (programmable) +10, -15 +10, -15 +10, -15 +10, -15
Bypass tolerance % (programmable) ±10 ±10 ±10 ±10
Frequency-Hz 60 ±6% 60 ±6% 60 ±6% 60 ±6%
Current distortion % -THD 0 -5 0 -5 0 -5 0 -5
Acceptable cable size range -AWG 1, 2, 3 3/0 -250 kcmil 4 -2 300 -500 kcmil 1 -2/0
Recommended overcurrent protection -
Amps 3, 4 200 80 300 125
Table 2: AC Output Specifications, UT340 and UT360
UT340 UT360
Voltage208Y/120 480Y/277 208Y/120 480Y/277
Rated output current -Amps 111 48 167 72
Tolerance % -symmetrical load
-asymmetrical load 5
-load step 0-100%
±1
±3
±5
±1
±3
±5
±1
±3
±5
±1
±3
±5
Distortion % -linear load 0 -3 0 -3 0 -3 0 -3
Frequency-Hz-mains synchronized
-free running% 60 ±6% ±0.1 60 ±6% ±0.1 60 ±6% ±0.1 60 ±6% ±0.1
Overload capacity%, mains operation
-1 minute
-10 minutes 250 150 250 150 250 150 250 150
Overload capacity%, batteryoperation
-1 minute
-10 minutes 150 125 150 125 150 125 150 125
Acceptable cable size range -AWG 1, 2, 3 1/0 -3/0 6 -3 4/0 -300 kcmil 3 -1
Recommended overcurrent protection -
Amps 3, 4 150 60 225 90
Notes for Tables 1 and 2:
1 Based upon ULratingoftermination connector and upon 75oC copper conductors at 30oC ambient fromNEC Table 310-16.
Conductor size mayvarybased on installation requirements.
2 For a 100%switch mode load, it is recommended that you size the neutral conductor for 1.732 times the phase current.
3 For units with external bypass, see Figures 4 and 5.
4 For UPS module only(UPS input breaker).
5 100%imbalance, provided output current ratingis not exceeded.

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Planning and Installation Manual
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Table 3: DC Input/Battery Specifications, UT340 and UT360
UT340 UT360
Acceptable external battery cable size range -
AWG 1250 kcmil or 2 x 1/0 500 kcmil or 2 x 3/0
Nominal DC current - Amps 200 300
Nominal DC voltage 216 216
Nominal number of cells 108 108
Factory-set float charge voltage2 246 246
Charger current limit - Amps 320 30
Inverter % efficiency - 100% load
- 75% load
- 50% load
- 25% load
91
91
89
86
92
92
90
87
Notes for Table 3:
1 Based on 75oC copper conductors at 30oC ambient, intermittent duty, from NEC Table 310-16. Conductor size may vary
based on installation requirements.
2 Adjust the float charge voltage setting per the battery manufacturer’s recommendations.
3 Programmable to lower level.
Table 4: General Specifications, UT340 and UT360
UT340 UT360
Noise attenuation - dB - differential mode
- common mode 160
120 60 120
Typical heat dissipation - kW (BTU)
- At full rated load, normal operation
- At full rated load, economy mode
- At 0.8 PF load, normal operation
- At 0.8 PF load, economy mode
2.11 (7185)
1.67 (5688)
1.68 (5748)
1.33 (4551)
3.16 (10,778)
1.86 (6333)
2.53 (8622)
1.48 (5067)
Efficiency %, AC to AC - normal operation
- economy mode 95 96 95 97
Humidity %, non-condensing maximum 95 95
Ambient UPS and battery temperature - oF (oC) 32 - 104 (0 - 40) 32 - 104 (0 - 40)
Ideal UPS and battery temperature - oF (oC) 77 (25) 77 (25)
Air flow - CFM (m3/hour) 706.8 (1200) 706.8 (1200)
Audible noise, typical - dBa 55 55
UPS dimensions, with conduit connection kit
H x W x D - inches (mm) 59.1 x 39.4 x 31.5 (1500 x 1000 x 800) 59.1 x 39.4 x 31.5 (1500 x 1000 x 800)
UPS total weight - lbs (kg) 1741 (790) 2160 (980)
Conduit connection kit weight - lbs (kg) 54 (24.49) 54 (24.49)
Floor loading, UPS with conduit connection kit -
pounds per square inch (kPa) 14.93 (102.94)18.42 (127)
Note for Table 4:
1 With isolation transformer and the UPS wired as a separately derived system.

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Planning and Installation Manual
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103 Specifications for the UT380 and UT3100
Tables 5 - 8 contain specifications for UPS models UT380 and UT3100.
Table 5: AC Input Specifications, UT380 and UT3100 UT380 UT3100
Voltage3 x 480Y/277 3 x 480Y/277
Rated input current -Amps 127 159
Mains tolerance % (programmable) +10, -15 +10, -15
Bypass tolerance % (programmable) ±10 ±10
Frequency-Hz 60 ±6% 60 ±6%
Current distortion % -THD 0 -5 0 -5
Acceptable cable size range -AWG 1, 2, 3, 4, 5 2/0 -4/0 3/0 -250 kcmil
Recommended overcurrent protection -Amps 4, 5 175 200
Table 6: AC Output Specifications, UT380 and UT3100 UT380 UT3100
Voltage480Y/277 480Y/277
Rated output current -Amps 96 120
Tolerance % -symmetrical load
-asymmetrical load 6
-load step 0-100%
±1
±3
±5
±1
±3
±5
Distortion %, linear load 0 -3 0 -3
Frequency-Hz -mains synchronized
-free running% 60 ±6% ±0.1 60 ±6% ±0.1
Overload capacity% mains operation -1 minute
-10 minutes 250 150 250 150
Overload capacity% batteryoperation-1 minute
-10 minutes 150 125 150 125
Acceptable cable size range -AWG 1, 2, 3, 4, 5 1 -2/0 1/0 -3/0
Recommended overcurrent protection -Amps 4, 5 125 150
Notes for Tables 5 and 6:
1 Bus bar can accept up to 2 cables per terminal.
2 Based upon ULratingoftermination connector and upon 75oC copper conductors at 30oC ambient fromNEC Table 310-16.
Conductor size mayvarybased on installation requirements.
3 For a 100%switch mode load, it is recommended that you size the neutral cable for 1.732 times the phase current.
4 For units with external bypass, see Figures 4and 5.
5 For UPS module only(UPS input breaker).
6 100%imbalance, provided output current ratingis not exceeded.

UT340, UT360, UT380, and UT3100
Planning and Installation Manual
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Table 7: DC Input/Battery Specifications, UT380 and UT3100
UT380 UT3100
Acceptable external battery cable size range - AWG 1250 kcmil or 2 x 1/0 500 kcmil or 2 x 3/0
Nominal DC current - Amps 245 310
Nominal DC voltage 360 360
Nominal number of cells 180 180
Factory-set float charge voltage 2410 410
Charger current limit - Amps 325 30
Inverter % efficiency - 100% load
- 75% load
- 50% load
- 25% load
92
92
90
87
93
93
91
88
Notes for Table 7:
1 Based on 75oC copper conductors at 30oC ambient, intermittent duty, from NEC Table 310-16. Conductor size may vary
based on installation requirements.
2 Adjust the float charge voltage setting per the battery manufacturer’s recommendations.
3 Programmable to lower level.
Table 8: General Specifications, UT380 and UT3100 UT380 UT3100
Noise attenuation - dB - differential mode
- common mode 160
120 60 120
Typical heat dissipation - kW (BTU)
- At full rated kW load, normal operation
- At full rated kW load, economy mode
- At 0.8 PF load, normal operation
- At 0.8 PF load, economy mode
3.33 (11,377)
2.47 (8445)
2.67 (9101)
1.98 (6756)
4.17 (14,221)
3.09 (10,556)
3.33 (11,377)
2.47 (8445)
Efficiency %, AC to AC - normal operation
- economy mode 96 97 96 97
Humidity %, non-condensing maximum 95 95
Ambient UPS and battery temperature - oF (oC) 32 - 104 (0 - 40) 32 - 104 (0 - 40)
Ideal UPS and battery temperature - oF (oC) 77 (25) 77 (25)
Air flow - CFM (m3/hour) 706.8 (1200) 706.8 (1200)
Audible noise, typical - dBa 55 55
UPS dimensions, with conduit connection kit
H x W x D - inches (mm) 59.1 x 39.4 x 31.5 (1500 x 1000 x 800) 59.1 x 39.4 x 31.5 (1500 x 1000 x 800)
UPS total weight - lbs (kg) 2425 (1100) 2634 (1195)
Conduit connection kit weight - lbs (kg) 54 (24.49) 54 (24.49)
UPS weight with conduit connection kit -
pounds per square inch (kPa) 20.62 (142.17) 22.36 (154.17)
1 With isolation transformer and the UPS wired as a separately derived system.

UT340, UT360, UT380, and UT3100
Planning and Installation Manual
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104 Receiving and Moving the UPS
WARNING!
The UPS and related equipment are very heavy. To prevent personal injury or equipment
damage, use extreme care when handling and transporting the UPS cabinet and related
equipment.
1. While the UPS system is still on the truck, inspect the equipment and shipping container(s)
for any signs of damage. Do not install the system if damage is apparent. If damage has
occurred, notify BEST as soon as possible.
2. Compare the shipment with the bill of lading. Report any missing items to the carrier and to
BEST immediately.
3. Remove the screws on the bottom part of the packaging side plates.
4. Lift the main package up and off the unit and remove the packing materials from the unit.
5. Check that the label inside the UPS front door corresponds to the system ordered, especially
the input/output voltages.
6. Unbolt the unit from the pallet.
7. Remove the unit from the pallet with a fork lift.
8. Use a fork lift or hand truck to transport the unit to the installation site or storage site. Study
the footprint to decide how you will move the UPS through doorways and into position.
9. Install the separately shipped conduit connection kit. See the conduit connection kit for
installation instructions.

UT340, UT360, UT380, and UT3100
Planning and Installation Manual
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105 Storing the UPS and Batteries
You can store the UNITY/IUPS between -4oand 104oF (-20oand 40oC). However, BEST
recommends that the unit and batteries be stored between 59oand 77oF (15oand 25oC). This
temperature range or cooler allows batteries to have a longer shelf life. Recharge stored batteries
every90 to 120 days.
106 Finding a Location for the UPS
Keep these guidelines in mind when you choose the location for the UPS system and the
batteries.
Place the UPS in a clean, dust-free environment, free of contaminants. The air must be free
to circulate around the UPS cabinet and anybatterycabinets or racks.
Avoid placing the unit in direct sunlight or near other heat sources.
Make sure that the ambient temperature is 32oto 104oF (0oto 40oC).
Ideal temperature is 77oF (25oC).
NOTE:At 95oF (35oC), batterylife will be about one-half of what it would be at a normal
temperature of 77oF (25oC). At 113oF (45oC), batterylife will be about one-
fourth of normal.
Make sure that the floor can support the weight of the UPS, external batteries, and anyother
necessaryequipment. See Table 4 in Section 102 or Table 8 in Section 103 for weights and
floor loading specifications.
The unit can be placed close to walls as long as there is enough clearance for the front doors
to open. Required service clearance is 3 feet (914 mm) at the front and 3 feet (914 mm) at
the top of the unit. If possible, allow a minimum of 3 feet (914 mm) of clearance around the
entire unit for easier servicing.
All service access is from the front and top of the unit. Cable entryis from the bottom of the
unit.
Do not operate the UPS or batteries in a sealed room or container.

UT340, UT360, UT380, and UT3100
Planning and Installation Manual
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107 Technical Support
Best Power Technology, Incorporated is committed to outstanding customer service. Our
Technical Support Center is happy to help you with any problems or answer any questions you
may have. A service technician is available 24 hours a day, 365 days a year.
Please have the UPS model number and serial number available when you call. See the ID
label located inside the front door of the UPS.
Technical Support: 1-800-356-5737 (U.S.A. and Canada) or 1-608-565-2100
Technical Support Fax: [phone] or 1-608-565-2509
Bulletin Board Service: 1-608-565-7424
CompuServ: Type “Go BEST” at any ! prompt
Section 200: Installation
WARNING!
Before continuing, read the warnings on the inside front cover of this manual.
Insulated Tools and Other Equipment Needed:
Torque wrench in inch-pounds or
newton-meters
Standard U.S. and metric wrenches
Petroleum jelly or conductive grease
Mallet
Volt-Ohm meter (True RMS - Digital)
Pliers
Ratchet and sockets
Electrical tape
Standard and Phillips screwdrivers
Torx head screwdriver set
Brush (for applying petroleum jelly or
conductive grease to battery terminals)

UNITY /I User Manual
Phase rotation meter
The customer must provide all cabling and interconnection hardware.

UT340, UT360, UT380, and UT3100
Planning and Installation Manual
10
201 Installing the Maintenance Bypass Cabinet (MBC) and UPS
IMPORTANT!
If you do not have a BEST maintenance bypass cabinet (MBC), you must provide
overcurrent protection and a UPS input AC disconnect means.
BEST strongly recommends that a means of bypassing the UPS from the critical load be
provided for maintenance.
Follow these guidelines when installingthe MBC and UPS:
Use the information in Section 106 to find an appropriate location for the UPS. Install the
conduit connection kit per the instructions provided with the conduit connection kit.
Install the MBC within sight of the UPS. When installingthe MBC, see Figure 4or 5 and
anyinstructions provided with the MBC.
Install the AC input and UPS output in separate conduits. UPS output cabling shall be
installed in dedicated conduit systemsand not shared with other electrical circuits.
Control wiring must be installed in separate conduit.
Good ground connections are necessaryto reduce electrical noise and make the operation of
the UPS and the loads safe. Follow the grounding guidelines in the installation wiring
diagram. Refer to the National Electrical Code (NEC), appropriate IEEE documents, and all
applicable codes.
When installing the AC wiring, refer to Figure 3, 4, or 5and to anyadditional diagrams
provided with the UPS.
Figures 3, 4, and 5show typical installations. Your installation maydiffer.
•If you are installingthe UPS with no maintenance bypass cabinet, see Figure 3.
•If you have a UT340 or UT360 with a BEST-supplied rotaryswitch MBC, see Figure 4.
•If you have a UT380 or UT3100 with a BEST-supplied three-breaker MBC, see Figure 5.
See Figure 2 for a front view of the UPS with the covers removed. See Figure 6 for
information on the external connection board. See Figure 7 for information on the optional
communication interface board. See Figure 8 for information on the optional relayboard.
If you have anyquestions, contact BEST’s Technical Support Center for assistance (see
Section 107).

UT340, UT360, UT380, and UT3100
Planning and Installation Manual
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Figure 2: Front View (Covers Removed)

UT340, UT360, UT380, and UT3100
Planning and Installation Manual
12
Figure 3: UT340 - UT3100 Installation Wiring Diagram, Typical Installation,
No External Maintenance Bypass Cabinet
NOTE 1:(a) For a UT340 or UT360, see Table 1 in
Section 102 for recommended input overcurrent
protection. (b) For a UT380 or UT3100, see Table 5 in
Section 103 for recommended input overcurrent
protection.
NOTE 2:(a) For a UT340 or UT360, see Table 2 in
Section 102 for recommended output overcurrent
protection. (b) For a UT380 or UT3100, see Table 6 in
Section 103 for recommended output overcurrent
protection.
NOTE 3:You must provide overcurrent protection and
UPS input AC disconnect means.
NOTE 4:(a) Refer to anyinstructions provided with the
DC disconnect (DCD) and pre-charge/discharge switch.
(b) The pre-charge/discharge boxmust be located less
than 10 feet (3 m) from the DC disconnect.
ADDITIONAL NOTES:

A qualified electrician must install the UPS according
to all applicable codes.

All power and control wires must be in separate
conduits.

The grounding electrode conductor (protective
earth—PE) must be the same size (ampacity) as the
UPS input conductors. Conduit is not an acceptable
grounding electrode conductor—see National Electrical
Code Section 250-91(a).

A UT340 or UT360 unit is wired from the factoryas a
separatelyderived system. Output neutral is bonded to
equipment ground through main bonding jumper inside
the UPS. See National Electrical Code Article 250-5(d)
and 250-26 for proper installation grounding.

UT340, UT360, UT380, and UT3100
Planning and Installation Manual
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Figure 4: UT340 and UT360 Installation Wiring Diagram, Typical Installation
NOTE 1: Size the mains input overcurrent protection
device per applicable codes. See the table below for
mains input volta
g
e and current ratin
g
s.
Mains Input
UPS Model VAC Maximum Amps
UT340 208 200
UT340 480 86
UT360 208 301
UT360 480 130
NOTE 2: (a) Refer to an
y
instructions provided with the
DC disconnect (DCD) and pre-char
g
e/dischar
g
e box.
(b) The pre-char
g
e/dischar
g
e box must be located less
than 10 feet (3 meters) from the DC disconnect.
ADDITIONAL NOTES:

A qualified electrician must install the UPS accordin
g
to all applicable codes.

All power and control wires must be in separate
conduits.

The
g
roundin
g
electrode conductor (protective
earth—PE) must be the same size (ampacit
y
) as the
UPS input circuit conductors. Conduit is not an
acceptable
g
roundin
g
electrode conductor—see
National Electrical Code Section 250-91(a).

A UT340 or UT360 unit is wired from the factor
y
as a
separatel
y
derived s
y
stem. Output neutral is bonded to
equipment
g
round throu
g
h main bondin
g
j
umper inside
the UPS. See National Electrical Code Article 250-5(d)
and 250-26 for proper installation
g
roundin
g
.

If
y
ou do not have a BEST-supplied maintenance
b
y
pass cabinet (MBC),
y
ou must provide overcurrent
protection and UPS input AC disconnect means.

The maintenance b
y
pass switch must be a 4-pole
device which switches all three phases and neutral. If
y
ou are usin
g
a 3-pole device, contact BEST’s
Technical Support Center for instructions to convert the
unit to a not-separatel
y
derived s
y
stem.

UT340, UT360, UT380, and UT3100
Planning and Installation Manual
14
Figure 5: UT380 and UT3100 Installation Wiring Diagram, Typical Installation
NOTE 1: Size the mains input overcurrent protection
device per applicable codes. See the table below for
mains input volta
g
e and current ratin
g
s.
Mains Input
UPS Model VAC Maximum Amps
UT380 480 173
UT3100 480 216
NOTE 2: (a) Refer to an
y
instructions provided with the
DC disconnect (DCD) and pre-char
g
e/dischar
g
e box.
(b) The pre-char
g
e/dischar
g
e box must be located less
than 10 feet (3 meters) from the DC disconnect.
ADDITIONAL NOTES:

A qualified electrician must install the UPS accordin
g
to all applicable codes.

All power and control wires must be in separate
conduits.

If
y
ou do not have a BEST-supplied maintenance
b
y
pass cabinet (MBC),
y
ou must provide overcurrent
protection and UPS input AC disconnect means.

UT340, UT360, UT380, and UT3100
Planning and Installation Manual
15
NOT USED
X007-X011 ARE CHANGE OVER RELAY CONTACTS (NOT TO EXCEED NEC ART. 725 C CLASS 2 LIMITS)
NOT USED
SUMMARY ALARM IF 1-3 CONNECTED
BATTERY OPERATION (30 SECS. DELAY)
BATTERY OPERATION IF 1-3 ARE CONNECTED
THEN 1-3 ARE CONECTED
MBC INHIBIT; IF SYSTEM OUTPUT IS OUTSIDE LIMITS
NOT USED
EMERGENCY SHUT DOWN IF DISCONNECTED (12V CIRCUIT)
EMERGENCY SHUT DOWN IF 12VDC (10mA) EXTERNAL SUPPLY
IS REMOVED FROM TERMINALS. TO USE THIS FUNCTION
REMOTE START/STOP
13 COMMON, 11 "ON", 12 "OFF" (CLOSING CONTACTS)
NOT USED
BATTERY TEMPERATURE COMPENSATION PROBE
POSITION INDICATOR OF DCD IN OPTIONAL BATT. CABINET
SW01
X012
X010
X009
X008
X007
X011
X006
X005
2
9
8
7
6
5
4
3
14
13
12
11
10
15
17
16
111
1
BLUE
BROWN
110
2
3
1
1
3
3
1
2
3
1
2
3
1
2
3
1
2
3
1
X001
X002
X004
X003
NOT USED
NOT USED
TO CONTROLLER
BOARD
POSITION INDICATOR OF EXTERNAL UPS BYPASS SWITCH
REMOVE JUMPER SWO1
A JUMPER MUST BE USED IF THE UNIT HAS INTERNAL BATTERIES
NOT USED NOT USED
NOT USED
EXTERNAL BYPASS CONTACT
1-3 CONNECTED IF SYSTEM IS
IN STATIC BYPASS OPERATION
Figure 6: External Connection Board
Use Class 1 wiring methods.

UT340, UT360, UT380, and UT3100
Planning and Installation Manual
16
X005 X004 X003
COM-PORT
X001
To Controller
Not Used
COMMUNICATION
INTERFACE BOARD
X002
X003 25 PIN SUB D MALE
X004 25 PIN SUB D MALE
X005 25 PIN SUB D FEMALE
Serial Port
0 - 20 mA current loop
Serial Port
RS232
RELAY CONTACTS: 30 VAC, 60 VDC
Maximum 0.5 A, Minimum 0.05 mA
14
15 “UPS on” (shown with UPS off)
2
16
17 “Static bypass operation” (shown with static bypass operation off)
4
18
19 “Battery operation” (shown with battery operation off)
6
20
21 “Battery low warning” (shown with “battery low” warning off)
8
13 + Remote UPS shut down input (3.5 - 25 VDC pulse for 1 second minimum)
25 –
Figure 7: Communication Interface Board (Option)
Use Class 1 wiring methods.