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            Urecon | Celebrating 40 Years | 1969-2009

            Three-Phase Contactor Thermostat

            Three-Phase Contactor Thermostat

            This state-of-the-art three-phase electronic thermostat is designed to control heating loads up to 600 Vac having a total current draw not exceeding 60 A. It can be fitted with up to three temperature sensors as required by the application. Because separate temperature sensors are used, they may be installed on the pipe during the initial installation phase while the controller itself may only be installed at a later date.

            Features include:

            • 208, 480 or 600 Vac operation as specified for the use.
            • Choice of 3 pole circuit breaker sized for the application (15 to 60 A).
            • Internal ground fault detection circuitry eliminating the need for an external ground fault device. "Alarm only" or "alarm and trip" is activated when ground fault condition is present.
            • Three temperature sensor inputs: TS1 for pipe temperature control, TS2 (when enabled) for pipe temperature control at second location on the piping system and TS3 (when enabled) to serve as a high temperature limit for plastic piping protection. An alarm is activated when an enabled "open" or "shorted" sensor is detected.
            • Low temperature alarm on both controlling sensors TS1 and TS2. Alarm level is factory set at dedicated level for each sensor. Feature is enabled at customer request.
            • On-off control with a 1°C (1.8°F) temperature deadband for accurate control of piping systems. This close tolerance control can save thousands of kilowatt-hours of power consumption and is ideal to control electric tracing systems in locations where power is costly.
            • Override input (factory programmable): timed between 1-48 hours or non-timed. This feature forces "on" or "off" the output to suit the application, it can be used to force "off" the heating system during normal recirculation of the piping network.
            • Auto-cycle function (when enabled) momentarily turns on heating cable at 24 hours interval to monitor ground fault condition of the load.
            • One three-color LED indicator lamp mounted on the door of the controller operates as follows:
              • Green: When illuminated, the power supply to the controller is "on" and the pipe temperature at the sensor is above the setpoint. When extinguished, the power supply is "off ".
              • Amber: When illuminated, the temperature controller is calling for heat.
              • Red: When illuminated, this indicates that one of the alarms has been triggered. Controller is not calling for heat.
              • Amber and Red (alternating): This indicates that one of the alarms has been triggered. Controller is calling for heat.
            • Non-volatile memory retains all programmed parameters in the event of a power outage.

            Sensor type:

            This temperature controller can be factory programmed to operate with one of two different types of temperature sensor. By default the controller is programmed for 100 ohms platinum RTD sensor(s). It can also be programmed for 2 252 ohms thermistor(s) on special request . The last two digits of the controller's catalog number indicate the programming code. Control program codes from 01 to 49 are for use with RTDs and codes from 51 to 99 are for thermistors. Ensure that the proper type of temperature sensor is used with the controller . Program codes are listed in tables 5 and 6 (program codes are listed here).

            Numbering sequence : UTC-V3AA-xx

            • ‘V’ in the catalog number denotes the operating voltage, i.e. : 2 for 208, 4 for 480 or
            • 6 for 600. It also indicates the control transformer's voltage i.e. : 208/120, 480 /120 or 600/120.
            • ‘3’ in the catalog number denotes the number of poles on the circuit breaker.
            • ‘AA’ in the catalog number denotes the amperage of the circuit breaker, i.e. : 15, 20, 25, 30, 35, 40, 45, 50 or 60.
            • ‘xx’ in the catalog number denotes the control program code as listed in tables 5 and 6 (program codes are listed here).

            For example;

            • model number UTC-6320-01 would depict a 600 volts controller with a 3-pole, 20 A circuit breaker and programmed for control on plastic piping using one controlling sensor and one high limit sensor.
            • model number UTC-6345-31 would depict a 600 volts controller with a 3-pole, 45 A circuit breaker and programmed for control on metal piping using two controlling sensors.

            Possible combinations :

            Volts 15 amp 20 amp 25 amp 30 amp 35 amp 40 amp 45 amp 50 amp 60 amp
            208 V 2315 2320 2325 2330 2335 2340 2345 2350 2360
            480 V 4315 4320 4325 4330 4335 4340 4345 4350 4360
            600 V 6315 6320 6325 6330 6335 6340 6345 6350 6360