Tripp Lite S3MT Series User manual
1
Owner’s Manual
1111 W. 35th Street, Chicago, IL 60609 USA • tripplite.com/support
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S3MT-Series 3-Phase
Input Transformers:
480V-208V
Models: S3MT-20K480V, S3MT-30K480V
2
1. Introduction ................................................................................. 3
2. Important Safety Warnings.......................................................... 5
3. Installation .................................................................................. 6
3.1 Mechanical Data ...................................................................................6
3.2 Package Inspection ..............................................................................7
3.3 Unpacking the UPS ...............................................................................7
3.4 Package Contents.................................................................................9
3.5 Cabinet Overview ..................................................................................9
3.6 Power Cables ......................................................................................10
3.7 Transformer-to-UPS Connection Line Diagram ...................................11
3.8 Transformer-to-UPS Connections........................................................12
3.8.1 Connection for S3MT-20K480V to S3M20K3B UPS ...................................... 12
3.8.2 Connection for S3MT-30K480V to S3M25K or S3M30K UPS........................ 12
4. Operations................................................................................. 13
4.1 Over-Temperature Protection..............................................................13
4.1.1 Over-Temperature Red Warning LED Light ................................................... 13
4.1.2 Over-Temperature Protection Relay and Thermal Switch............................. 13
5. Specifications............................................................................ 14
6. Storage...................................................................................... 15
7. Warranty and Regulatory Compliance........................................ 16
Table of Contents
3
1. Introduction
Tripp Lite’s S3MT-20K480V and S3MT-30K480V Input isolation transformers provide 480V (Delta) to 208V (Wye) step-down
and isolation protection to the connected UPS and its load.
The transformer has input isolation to mitigate utility line surges and spikes, while protecting the UPS. The transformer includes
a built in breaker at the transformer output side for protection. Two ball-bearing fans maintain quiet operation. An overheat-
sensing relay and switch combine with a warning light to provide over-temperature warning and overheating protection.
The UPS system’s small footprint and quiet acoustic profile enable installations with minimal space and noise impact. All
transformer models feature rugged stainless steel housings with front panels similar to the S3M-Series 208V 3-Phase UPS line.
UPS Model Series Number Capacity Description
S3MT-20K480V AG-050B 20kW 480V to 208V Input Isolation Transformer
S3MT-30K480V AG-050C 30kW 480V to 208V Input Isolation Transformer
Typical applications
4-Wire (3Ph+N+PE) IT equipment loads in government, manufacturing, hospitals, industrial settings and corporate settings
that have a 480V electrical feed and 208V/120V IT Loads.
Key Features
• Isolation protection to the UPS input, with stepped-down input from 480V (Delta) to 208V/120V (Wye)
• Circuit breaker and overheating protection
• 95% to 97.5% efficiency
• Wide input voltage and frequency operating range
Voltage: -20% to +25% @ 100% load and 40-70 Hz
• Insulation class: 180°C material
• Reliability-tested according to ISTA-3B for vibration, shock, drop (tip test)
• UL and CSA TUV certifications
• Rugged stainless steel housing shipped ready for installation
• 2-year warranty
4
1. Introduction
Typical Configuration
These 480V Input Transformers may be purchased separately or as part of kit model with a Tripp Lite S3M Series 3-Phase
UPS:
Input
Transformer Models
Maximum
Constant Load
Compatible with
208V 3Ph UPS
Kit Models: UPS + Transformer
Kit Models Kit Models Include
480V
S3MT-20K480V 20kW 10-20kW UPS S3M20K-20K4T S3MT-20K480V +
S3M20K3B UPS
S3MT-30K480V 30kW 20-30kW UPS
S3M25K-30K4T S3MT-30K480V +
S3M25K UPS
S3M30K-30K4T S3MT-30K480V +
S3M30K UPS
480V, 208V/120V,
(Wye)
UPS
WYE-
Load
208/120V
220/127V
5
2. Important Safety Warnings
SAVE THESE INSTRUCTIONS
This manual contains important instructions for models S3MT-20K480V and S3MT-30K480V that should be followed during
installation and maintenance of the transformer and UPS.
CAUTION! Risk of electrical shock! Hazardous live parts inside this unit are energized from the transformer even when
the breaker is turned off.
WARNING! The unit intended for installation in a controlled environment.
CAUTION! A transformer can present a risk of electric shock and high short circuit current. The following precaution should
be observed when working on the transformer:
• Remove watches, rings or other metal objects.
• Use tools with insulated handles.
To reduce the risk of electric shock, disconnect the transformer and UPS from the mains supply before performing
maintenance or service.
Servicing of the 3-phase transformer and UPS should be performed by Tripp Lite certified personnel with knowledge of the
3-phase transformer and UPS and all required precautions.
The transformer is extremely heavy. Caution should be taken in moving and positioning equipment. The instructions contained
within this manual are important and should be closely followed at all times during installation and follow-up maintenance of
the 3-phase transformer and UPS.
CAUTION!
The transformer has a dangerous level of heat. If the transformer’s front-panel red LED indicator is on, the unit’s
outlets may have a dangerous level of heat.
All servicing on this equipment must be carried out by Tripp Lite-certified service personnel.
Before conducting any maintenance, repair or shipment, first ensure everything is turned off completely and
disconnected.
Special Symbols – The following symbols are used on the transformer to warn you of precautions:
RISK OF ELECTRIC SHOCK - Observe the warning that a risk of electric shock is present.
CAUTION - REFER TO THE OWNER’S MANUAL for information regarding important operating and
maintenance instructions.
SAFE GROUNDING TERMINAL - Indicates THE primary safe ground.
6
3. Installation
3.1 Mechanical Data
Physical Requirements
Leave space around the cabinet for operation and ventilation (Figure 3-1):
1. Leave at least 20 in. (500 mm) space in the front for ventilation
2. Leave at least 20 in. (500 mm) space at the right and left for operation
3. Leave at least 20 in. (500 mm) space at the back for ventilation
Figure 3-1
17.4”
(442 mm)
47.2”
(1200 mm)
33.5”
(850 mm)
≥20”
(500 mm)
≥20”
(500 mm)
≥20”
(500 mm)
≥20”
(500 mm)
≥20”
(500 mm)
7
3. Installation
3.2 Package Inspection
1. Don’t lean the transformer cabinet when removing it from the packaging.
2. Check the appearance to see if the transformer cabinet was damaged during transport. Do not power on the transformer
cabinet if any damage is found. Contact the dealer immediately.
3. Check the accessories against the packing list and contact the dealer in case of missing parts.
3.3 Unpacking the UPS
1. Hold the sliding plate steady. Cut and remove the binding
straps (Figure 3-2).
Figure 3-2
2. Remove the plastic bag and the outer carton (Figure 3-3).
Figure 3-3
8
3. Installation
3. Remove the foam packing material and the beveled pallet
(Figure 3-4).
Figure 3-4
4. Unfasten the screws and remove the sheet metal affixed
to the cabinet (Figure 3-5).
5. Slowly slide the unit from the pallet (Figures 3-6A and 3-6B).
Figure 3-5
Figure 3-4
Figure 3-6A Figure 3-6B
9
3. Installation
3.4 Package Contents
Contents TL P/N S3MT-20K480V S3MT-30K480V
Input Transformer 1 1
Owners Manual 933D03 1 1
3.5 Cabinet Overview
1Over-Temperature Alarm LED
2Cooling Fans
3Breaker with Trip
4Cabling Terminals
5Bottom Entry Knockouts
(for Power Cable Entry and Exit)
2
4
1
3
5
Front View Rear View (terminal block without cover)
10
3. Installation
3.6 Power Cables
The cable design shall comply with the voltages and currents provided in this section, and in accordance with local electrical
codes.
WARNING!
UPON STARTUP, ENSURE YOU ARE AWARE OF THE LOCATION AND OPERATION OF THE EXTERNAL
ISOLATORS CONNECTED TO THE UPS INPUT/BYPASS SUPPLY OF THE UTILITY DISTRIBUTION PANEL.
ENSURE THESE SUPPLIES ARE ELECTRICALLY ISOLATED AND POST ANY NECESSARY WARNING SIGNS TO
PREVENT INADVERTENT OPERATION.
Cable Sizes
UPS Model
Cable Sizes (THHW wiring at 75°C)
AC Input AC Output Neutral Grounding
Gauge Torque Gauge Torque Gauge Torque Gauge Torque
S3MT-20K480V
10 AWG
Max.
4 AWG
6.5 N•m
4 AWG
Max.
4 AWG
6.5 N•m
4 AWG
Max.
4 AWG
6.5 N•m
4 AWG
Max.
4 AWG
6.5 N•m
S3MT-30K480V
6 AWG
Max.
3 AWG
6.5 N•m
3 AWG
Max.
3 AWG
6.5 N•m
3 AWG
Max.
3 AWG
6.5 N•m
3 AWG
Max.
3 AWG
6.5 N•m
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