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Transformer Advantage 3 CT/LTC


Oil, Winding & LTC Temperature Monitor for Oil-Filled Transformers
Three RTD inputs and 1 or 3 winding current inputs..

The Transformer Advantage 3 is a precision temperature monitor for liquid immersed power and distribution transformers. It is rugged, fully electronic and field configurable. With Transformer Advantage, users can extend transformer life, utilize maximum capacity and reduce maintenance costs.

Five models in the Advantage line offer a range of functions and configurations. All use an accurate and stable platinum temperature sensor (RTD) to precisely measure critical liquid temperatures. Probe options fit most popular thermowells, or magnetically mount on units without wells.  Setpoint relays can activate alarms or multiple stages of cooling at different temperatures. A sequencing function equalizes run time between cooling stages. The fan timer can exercise fans at a preset time each day.

Advantage 3 CT/LTC
This top end model in the Advantage line combines transformer and LTC monitoring in one unit. For a Load Tap Changer with a thermowell, the main tank (top oil) probe is used as a reference for both calculated winding temperature and Load Tap Changer temperature differential. The third temperature input is available to monitor ambient or bottom oil. For an LTC without a thermowell, this input is used with an additional magnetic probe on the main tank as an LTC reference.

  • Three  RTD inputs.
  • One to three winding current inputs.
  • Winding temperature calculated per IEEE guide.
  • Up to 12 relay outputs for cooling and alarms.
  • Analog retransmits.
  • Cooling fan readback.
  • Auxiliary inputs.
  • Loss of life (insulation aging).
  • DNP3 & Modbus protocols.

Advantage 3 CT/LTC part numbers begin with G8N or G8P; older models with G8E, G8L or G8R.

Transformer-Advantage-3-Datasheet         Advantage-3 Simplified Selector

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Setpoint Relays
All units have one additional sensor fail relay.
First RTD Probe
Order up to 3 probes in the two probe fields.
Second RTD Probe
CT Input

Enter 2 digit code for full scale % of 10 amps.
Example 50=5 amps, 10=1 amp.
Enter 00 for 10 amps.
Enter SA for >10 amps (specify value on order).
Enter SP for <1 amp or special (specify on order).

Note: Letter codes U & T are not available with Ethernet or Fiber communications
SCADA Outputs
Walk-up USB port & DNP3/Modbus protocols included on all models
Thermowell Probe Adapters
Threaded adapter & tip sleeve for each thermowell probe ordered.
Input Options
Miscellaneous Options

3 digits required in part number. If no options needed, select both X & XX.
If more than 3 needed, select SXX and list on order.
Note: Ethernet or Fiber communications are not available for Power codes U & T. When Miscellaneous Option T, E or G is installed, active port for remote communication is selected during setup. Local USB port is always active.

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