Tripp Lite
1111 W. 35th Street
Chicago, IL 60609
+1 (773) 869-1776
+1 (773) 869-1329

SmartOnline S3MT-Series 3-Phase 100kVA Input Isolation Transformer, 600V Delta to 208V Wye

100kVA/kW transformer provides 600V (Delta) to 208V (Wye) step-down and isolation protection to a 3-phase UPS and its load.

  • Recommended for government, manufacturing, healthcare and corporate settings
  • Up to 97.7% efficiency with a quiet acoustic profile less than 65 dBA
  • Resettable protection relay/switch and red LED indicator warn against overheating
  • Rugged stainless steel housing with compact footprint comes ready for installation
  • Compatible with 80–100kVA/kW Tripp Lite S3M-Series 208V 3-phase UPS systems
  • 2-year limited warranty

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Tripp Lite Part Number

S3MT-100K600V New

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Get Complete Step-Down/Step-Up and Isolation Protection
Tripp Lite’s S3MT-100K600V 100kVA/kW transformer offers line isolation and protection to the connected 3-phase UPS system and its load. It isolates the UPS and connected components from line surges and spikes caused by utility power disruptions that can damage equipment or corrupt data. The step-down input isolation transformer is ideal for 4-wire (3Ph+N+PE) IT loads in government, manufacturing, healthcare and corporate settings with a 600V electrical feed and 208/120V equipment.

Performs with High Efficiency up to 97.7%
Not only is the S3MT-100K600V very efficient, with up to 97.7 percent efficiency, but it is also very quiet with a noise profile less than 65 dBA. A built-in circuit breaker on the output side helps prevent dangerous power overloads. Three ball-bearing cooling fans help prevent overheating. An overheat-sensing relay and switch combine with a red LED indicator to provide over-temperature warning and overheating protection.

Small Footprint for Quick Installation in a Compact Space
The compact footprint enables installation of the S3MT-100K600V with minimal space. The rugged stainless steel housing ships ready for immediate tower installation with a compatible 80–100kVA/kW Tripp Lite S3M-Series 208V 3-phase UPS system.

Typical Applications

Protect healthcare, manufacturing, corporate and other IT equipment where the upstream power source is 600V and the load requires a 208V 3-phase UPS

Package Includes

  • S3MT-100K600V 3-Phase 100kVA Input Isolation Transformer
  • (4) Bottom skirts
  • (24) Screws
  • Owner’s manual

System Requirements

80–100kVA/kW Tripp Lite S3M-Series 208V 3-phase UPS system

TAA compliant RoHS compliant


UPC Code037332253170
Efficiency96.7% @ full load
Nominal Voltage / Frequency600V 3-PH / 60Hz
VA / Watt Capacity100000
Transformer TypeDry type, Input step-down isolation transformer
Nominal Input Voltage(s) Supported600V 3-PH Delta
UPS Input Connection TypeHardwire
Input Phase3-Phase
Output Volt Amp Capacity (VA)100000
Output Capacity (kVA)100
Output ReceptaclesHardwire
Primary Form FactorTower
Cooling Method3 x BALL BEARING, 172x152mm (723 TOTAL CFM)
Form Factors SupportedTower
Shipping Dimensions (hwd / in.)55.10 x 27.60 x 37.80
Unit Dimensions (hwd / in.)47.2 x 23.6 x 33.5
Unit Weight (lbs.)1049
Heat Dissipation (BTU/Hr) @ Full Load  11263
Input Voltage600V
Input Voltage Range(-45%, +25%) for 40% load (-20%, +25%) for 100% load
Input Amp(s)134 A
AC Input ConfigurationDelta
AC Input Frequency50/60
Frequency Range40/70Hz
Voltage SelectionNONE
Input Inrush Current1160 A
VA Rating100K
Input Number of Phases3PH
AC Output Voltage (V)600 V
AC Output Amps374 A
Output Number of Phases3PH + N
AC Output ConfigurationWYE
Output IsolationYes
Output Breaker Rating400 A
Connection TypeCOPPER BAR
LED Warning Light FunctionsThe over-temperature warning LED light will turn ON when the output/secondary of the Input transformer reaches 160°C ±5°C and will turn OFF wthen the corresponding transfomer cools down to 125°C ±5°C
Over Temperature ResetIf the secondary side of the input transformer reaches temperatures of or higher than 160°C ± 5°C, i.e. a range of 155°C to 165°C (311°F to 329°F), an over-temperature protection relay and thermal switch will activate and will open the breaker on secondary side of the transformer. Once the transformer temperature has cooled down to 125°C ± 5°C, i.e. a range of 120°C to 130°C ( 248°F to 266°F) the warning LED light will turn OFF, and you may manually re-activate (close) the output breaker on the transformer to restart normal operation.
Efficiency @ Half Load


Efficiency @ Full Load


Heat Dissipation (BTU/Hr) @ Full Load11263
Audible Noise (dBA @ 1m)65dB max
Product Warranty Period (U.S. & Canada)2-year limited warranty

Questions & Answers

More Q&As may be available on the S3MT100K600V model support page.




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+1 (773) 869-1776

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+1 (773) 869-1234

Tripp Lite
1111 West 35th Street
Chicago, Illinois 60609
United States

+1 (773) 869-1111 Main
1 773.869.1329 Fax

Business Hours
8 AM - 5:30 PM CST

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We're always available to help with questions, including product selection, sizing, installation and product customization. Call us at +1 (773) 869-1776 or email