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Light Concepts and Design
Power Systems and Dimming - Terminology
17
Engineering
Undergraduate 4
11/18/2012

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Cards

Term
Break In/Out
Definition
Adapters used to distribute the circuits in a Socapex cable to individual fixtures or dimmers.
Term
Dimmer Curve
Definition
The relationship between the console fader level and the dimmer voltage output to the fixture.
Term
Dimmers
Definition
A device used to vary the voltage to an incandescent lamp thus varying the intensity.
Term
Disconnect
Definition
A fuse box with rocker switches to connect the supply side of the electrical service to the load side.
Term
Fan In/Out
Definition
See Break In/Out
Term
Feeder Cable
Definition
A conductor which carries a large block of power from the service equipment to a power distribution panel where the block power is broken down into smaller circuits.
Term
Forward Phase Control
Definition
An SCR dimmer that turns on during the cycle of the AC sine wave and off as the voltage crosses zero.
Term
Gating
Definition
The process of turning a thyristor on by applying a positive potential voltage at the gate terminal.
Term
Leg
Definition
Refers to any one of the hot conductors in an electrical system.
Term
Patching
Definition
Assigning a fixture to a console channel by either plugging a circuit into a dimmer or using console software to assign a dimmer to a channel.
Term
Phase
Definition
The time relationship between different current carrying legs in reference to the origin. See also Single Phase and Three Phase.
Term
Pig Tails
Definition
Cables with bare wire at one end and connectors on the other that attach to the load side lug nuts in a disconnect box.
Term
Reverse Phase Control
Definition
An SCR dimmer that turns on at the zero point and off during the AC sine wave.
Term
SCR
Definition
Silicon Controlled Rectifier; a solid state unidirectional thyristor used in modern dimming systems.
Term
Socapex
Definition
A brand of multi-core cable, usually housing 6 separate circuits.
Term
Single Phase
Definition
Electrical service with two energized wires offset by 180°
Term
Three Phase
Definition
Electrical service with three energized wires offset by 120°
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