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Electronic Theatre Controls Inc

Sensor Dimmer Module BTU Dissipation

Originally from Engineering Notes 050 -- January 27, 1994

Sensor Dimmer Module BTU Dissipation

Sensor dimmer efficiency evaluation
The following table provides information on the thermal efficiency of ETC Sensor dimmer racks. All dimmer efficiencies are measured at maximum current (full load). Note that the watt and some BTU figures shown below apply to single dimmers, not dimmer modules and a module often contains more than one dimmer.

Module Type

per Dimmer
Full Load in Watts

per Dimmer
Watts Dissipated

per Dimmer
BTUs Dissipated

Dimmer Efficiency

per Module
BTUs Dissipated

D15

1,800

56

191.072

96.9%

382.144

D15AF, D15E

1,800

70

238.84

96.1%

477.68

D20

2,400

77

262.724

96.8%

525.448

D20AF, D20E

2,400

119

406.028

95.1%

812.056

D20HR

2,400

259

883.708

89.2%

883.708

D50AF

6,000

237

808.644

96.1%

808.644

D50HR

6,000

543

1,852.716

90.9%

1,852.716

D100AF

12,000

446

1,521.752

96.3%

1,521.752

R20AF 2,400 <2 <5 ~99.9% <10
ELV10 / ELV10-S 1,200 42 143.4 96.5 286.8

Although Sensor dimmers are designed to operate safely in environments with ambient temperatures of up to 104°F (40°C), as with all electronic equipment, keeping the operating environment at cooler temperatures will help improve the service life of the equipment. In order to maximize the efficiency of your dimming system, dimmer room air conditioning should maintain an ambient dimmer room temperature of 68°F (20°C) or less.

IMPORTANT NOTE: When calculating air conditioning requirements, keep in mind that the BTU outputs cited in the table above are maximums. The heat actually dissipated may be less. Factors that influence actual heat dissipation include service ampacity, as well as how the dimmers are used and typical loads.