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Introduces the 111-300 series enclosure and its 111L/111W monitor units.
Step-by-step instructions for mounting, powering, and wiring the monitor.
Describes transformer operation and performing system tests.
Provides a detailed functional specification of the unit.
Guides through configuring the Temperature Monitor for specific needs.
Step-by-step instructions for manual setpoint adjustment.
Covers special requirements for using the monitor in Europe.
Guides through setting up Modbus communications.
Details how to mount the 111-300 on a flat surface using four fasteners.
Explains primary power connection and protection requirements for the unit.
Describes the use of 100 ohm Platinum RTD sensors for temperature monitoring.
Details SPDT contacts for Fan, Alarm, and Trip relays, plus mA output.
Explains the RS-232 data link for setup and parameter configuration.
Describes the optional RS-485 data link for Modbus RTU protocol communication.
Details the optional enclosure heater kit and its installation and wiring.
Explains the LCD display, icons, and their meanings.
Details the function of the MAN/FAN and TEST buttons for operation.
Explains the Fan Exerciser function to turn fans on at set intervals.
Describes how Fan Bank Switching evens wear by swapping setpoints.
Lists input power, measurement range, display resolution, accuracy, and memory retention.
Details operating/storage temps, humidity, hi-pot, vibration, and shock ratings.
Specifies box dimensions, weight, and mounting pattern for the unit.
Lists CE marking and compliance with EN standards for emissions, immunity, and safety.
Guides on installing the ETM Configuration software from the CD.
Explains selecting or creating configuration files for the ETM.
Covers viewing, changing, downloading, and uploading configuration data.
Details how the 111W stores winding rise tables for temperature calculation.
Describes printing the configuration and winding rise screens.
Explains how the 111W models send continuous data and display values.
Guides through checking and changing the calibration of the CT input.
Details the procedure for changing setpoints using front panel buttons.
Covers installation category and disconnection device requirements per EN 61010-1.
States that there are no fuses in the 111L/111W ETM.
Explains communication with a ModBus master station using the RS-485 port.
Details setting baud rate, parity, stop bits, and protocol via front panel.
Lists Modbus registers and the data returned when addressed for 111L and 111W.
Explains the meaning of individual bits in the ETM STATUS register.
Details bits for channel status, bank switching, and fan exerciser.
Lists Modbus registers for setpoints, switching differentials, and intervals.
Describes registers for controlling fan function and resetting stored data.
Introduces the 111-300 series enclosure and its 111L/111W monitor units.
Step-by-step instructions for mounting, powering, and wiring the monitor.
Describes transformer operation and performing system tests.
Provides a detailed functional specification of the unit.
Guides through configuring the Temperature Monitor for specific needs.
Step-by-step instructions for manual setpoint adjustment.
Covers special requirements for using the monitor in Europe.
Guides through setting up Modbus communications.
Details how to mount the 111-300 on a flat surface using four fasteners.
Explains primary power connection and protection requirements for the unit.
Describes the use of 100 ohm Platinum RTD sensors for temperature monitoring.
Details SPDT contacts for Fan, Alarm, and Trip relays, plus mA output.
Explains the RS-232 data link for setup and parameter configuration.
Describes the optional RS-485 data link for Modbus RTU protocol communication.
Details the optional enclosure heater kit and its installation and wiring.
Explains the LCD display, icons, and their meanings.
Details the function of the MAN/FAN and TEST buttons for operation.
Explains the Fan Exerciser function to turn fans on at set intervals.
Describes how Fan Bank Switching evens wear by swapping setpoints.
Lists input power, measurement range, display resolution, accuracy, and memory retention.
Details operating/storage temps, humidity, hi-pot, vibration, and shock ratings.
Specifies box dimensions, weight, and mounting pattern for the unit.
Lists CE marking and compliance with EN standards for emissions, immunity, and safety.
Guides on installing the ETM Configuration software from the CD.
Explains selecting or creating configuration files for the ETM.
Covers viewing, changing, downloading, and uploading configuration data.
Details how the 111W stores winding rise tables for temperature calculation.
Describes printing the configuration and winding rise screens.
Explains how the 111W models send continuous data and display values.
Guides through checking and changing the calibration of the CT input.
Details the procedure for changing setpoints using front panel buttons.
Covers installation category and disconnection device requirements per EN 61010-1.
States that there are no fuses in the 111L/111W ETM.
Explains communication with a ModBus master station using the RS-485 port.
Details setting baud rate, parity, stop bits, and protocol via front panel.
Lists Modbus registers and the data returned when addressed for 111L and 111W.
Explains the meaning of individual bits in the ETM STATUS register.
Details bits for channel status, bank switching, and fan exerciser.
Lists Modbus registers for setpoints, switching differentials, and intervals.
Describes registers for controlling fan function and resetting stored data.
The QualiTROL 111-300 Series is an Electronic Temperature Monitor designed for liquid-cooled transformers. It is housed in a weatherproof enclosure and can contain either one or two Model 111L/111W Electronic Temperature Monitor (ETM) units.
The basic unit, Model 111W, monitors winding current to calculate winding temperature and provides four setpoint contacts that operate based on this temperature. An optional Model 111L can be included to independently monitor oil temperature, offering an additional four setpoint contacts. These ETMs use RTD (Pt100) temperature sensors in a thermal well to monitor oil temperature, and a clip-on CT to measure winding current without breaking existing CT wires.
Both 111L and 111W units offer several standard features:
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