Tree Tech Model TM1 The Temperature Monitor, TM1 is the latest generation of the widely applied temperature monitor MT1. Updated with all the experience acquired by Tree Tech over the last 6 years and 2000 plus monitor installations, the TM1 is on technologies cutting edge. The TM1 replaces the mechanical winding and oil thermometers used in oil-filled transformers and reactors with all the advantages of micro-controller technology. The TM1 has great user flexibility. Each module can be parameterized to the specification of individual users. The system is modular, enabling the expansion of the number of measured winding by cooperation with a Tree Tech Model TM2 Temperature Monitor. The TM1 and TM2 are linked via RS-485 serial communications ports.

View TM1 Datasheet

Key Features

• Input for PT100W at 0 ºC sensors with self-calibration, accuracy of 0.2% of scale and high stability in wide temperature ranges. Accommodation for a 3-wire Pt100W sensor, a 4-wire Pt100W or two 3-wire Pt100W sensors. (Redundant temperature measuring and measuring validation)

• One true RMS universal AC input from 0-10A, accuracy of 0.5% of scale, used to measure the load and calculate the winding temperature through the thermal imaging process.

• Two high-bright LED displays to facilitate the visualization of oil and winding temperatures in all lighting conditions.

• Calculation of the final gradient forecast for oil-winding temperature at the current load.

• Two current outputs for remote indication of temperatures with an output band selection of (0-1mA,0-5mA, 0-10mA, 0-20mA and 4-20mA)

• Two N.O. contacts (N.C. or combinations under request) for temperature alarms

• Two N.O. contacts (N.C. or combinations under request) for oil and winding temperature trips, with double security provision (simultaneous sequence of 2 micro-controllers for operation). Adjustable temperature setting from 0-20 minutes with countdown display.

• Two N.C. contacts for the startup of forced cooling groups. Time Delay between the startup of each group (even with power outage of TM-1) and forced operation through the self-diagnostic routines in case of module failure or voltage outage.

• Cooling operation is selectable on the front panel between Automatic and Manual. Automatic rotation of the operation of the two forced cooling groups for uniform fan usage.

• One N.C. contact for power outage or internal failure detected during the self-diagnostics.

• Self-Diagnostic: 2 micro-controllers (reciprocal supervision), detection of temperature and current measuring failure, relay activation
  etc…

• Two RS-485 serial ports, one for connection with TM-2 if applicable and another to be used by the user for connection with Modbus® RTU protocol to acquire online data, remote control and parameterization.

• One RS-232 serial port to acquire online data and for parameterization through an application software provided free of charge.

• Total absence of mechanical parts and self-calibration through the TM1 firmware.