Qualitrol Co. - Qualitrol 118 ETM Dry Type Transformer Monitor

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	Qualitrol 118 ETM Dry Type Transformer Monitor The Model 118 Series Electronic Temperature Monitor (ETM) monitors up to three (3) ventilated Dry-Type transformer windings. The ETM operates relays by comparing the highest winding temperature to stored set point temperatures and displays three (3) thermocouple inputs as well as the stored maximum temperature and its associated winding. The unit provides Fan, Alarm, and Trip circuitry. A fuse protected high contact rating SPST contact is provided for fan control. A yellow LED indicates that fans are on. A fan exerciser circuit turns the fans on automatically at periodic intervals to prevent fan motor seizing (on-time and interval is programmable). As an option, a second set of SPST contacts with separate fusing can be specified. SPDT contacts are provided for notification of alarm conditions. A red LED illuminates to indicate that the alarm is actuated. An internal audible buzzer also sounds when the unit goes into alarm condition. This audible buzzer can be silenced without canceling the alarm. The alarm relay is fail-safe (normally energized when the unit is powered up). If supply power to the ETM is interrupted, the alarm circuit changes state for notification of this condition. The alarm circuit is also used for notification of an open or missing thermocouple. If a thermocouple were to open, the alarm relay operates and the corresponding channel will read "-" on the LED display. It is important to note that a failed thermocouple will not cause the device to trip the transformer off-line. One (1) set of SPDT contacts are provided to trip the transformer off-line if any of the winding temperatures exceed the trip setting. A red LED indicates that the trip relay has actuated. A test function is provided to: test the digital display and all of the LEDs; display the stored set points; check the internal temperature of the monitor. A 0-1 mA (std.) or 4-20 mA (optional) signal is provided for remote indication or for use with SCADA systems.
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Item	118L 118L Series Digital Temperature Monitor	118 Model 118 Series Electronic Temperature Monitor for Dry-Type Transformers

Power Supply	Universal 20 to 280 VDC Universal 85 to 265 VAC	N/A

Input Supply Power	N/A	120/240 VAC ±15%, 50/60 Hz. (std) 277 VAC +8%, -15%, 50/60 Hz. (optional) Universal 80-265 VAC/20-280 VDC (optional)

Input Thermocouple	N/A	Three (3) Type "K"

Measurement Range	0 to 200 ºC	N/A

Accuracy	±1% at ambient temperatures of 0 to 60º C ±1.5% at ambient temperatures of -30 to 0º C and +60 to 70º C	±0.08% ± one count under normal conditions ±2% ± one count under extreme conditions Extreme conditions arcs: Ambient temperature colder than -10ºC Winding to unit temperature greater than 210ºC

Display	3-digit LCD	N/A

Memory Retention	10 years (with power off )	N/A

Switch Ratings	0.2A @ 300 VDC resistive load 5A @ 250 VAC or 30 VDC resistive load	N/A

Remote Output Current Loop	0 to 1 mA 4 to 20 mA 10000 ohms 500 ohms	N/A

Operating Temperature	-30 to +70 ºC	-30 to +72 ºC

Storage Temperature	-50 to +85 ºC	-50 to +72 ºC

Relative Humidity	90% (non-condensing)

Hi-Pot	2300 VAC for 1 minute power or relay contact to ground, or from power input to electronic ground (power supply secondary)	1500 VAC 50/60 Hz for one minute to ground

Vibration	50 to 180 Hz. @ 0.004 displacement	60 to 120 Hz. @ 0.004" displacement

Shock	10 g in 3 orthogonal planes

Size	3.78" x 3.78" (96 x 96 mm), 3.94" 100 ohm deep DIN 1/4 cut out 3.62" x 3.62" (92 x 92 mm)	N/A

Weight	0.97 lbs 440 g	N/A

Front Membrane Panel	Graphic overlay UV stabilized Polyester	N/A

Mounting	1/4 DIN square cutout 3.62" x 3.62" (92 mm x 92 mm)	N/A

Electrical Screw Terminals	Screw terminal; maximum 12 gage wire	N/A

Declaration of Conformance CE	EN50081-1 (emissions) EN61000-6-2 (immunity) EN61010-1 (safety)	N/A

Range	N/A	0 to 250 ºC

Output Fans	N/A	One or two SPST contacts Rated 30 Amps @ 120/240 VAC 1 HP @ 120 VAC, 2 HP @ 240 VAC for each contact

Output Alarm	N/A	One SPDT contact Rated 10 Amps @ 120 VAC or 8 Amps @ 240 VAC (resistive)

Output Trip	N/A	One (1) SPDT contact Rated 10 Amps @ 120 VAC or 8 Amps @ 240 VAC (resistive)

Remote Output	N/A	0-1 mA into a load of up to 10,000 ohms max. 4-20 mA into a load of up to 500 ohms max. ±2% of hottest displayed temperature

Electrical Noise Immunity Per	N/A	SWC transient suppression per ANSI 37.90a - 1989 IEC EN50082-2

List Price	QUOTE