Three-Phase and Single-Phase Power
Overview
Global electrical distribution systems generally use one of these three schemes:
- Three-phase distrubution
- Three hot legs and one neutral leg, also called "4-wire" (plus ground)
- US: 120/208V or 277/480V
- Europe: usually 230/400V
- Three hot legs and one neutral leg, also called "4-wire" (plus ground)
- Split-phase or biphase distribution (referred to by ETC as "single-phase")
- Two hot legs and one neutral leg, also called "3-wire" (plus ground)
- US: 120/240V
- Japan: 100/200V
- Uncommon in Europe
- Two hot legs and one neutral leg, also called "3-wire" (plus ground)
- True single-phase distribution
- One hot leg and one neutral leg, also called "2-wire" (plus ground)
- Europe: usually 230V
- Uncommon in the US
- One hot leg and one neutral leg, also called "2-wire" (plus ground)
Most ETC power control racks and packs are intended for use with a three-phase supply. Some of these products also have special-order variants intended for use with a split-phase supply (these variants are referred to as the "single-phase" version).
Power control products by phasing
| Three-phase | Split-phase | |
| Sensor installation racks (120V) | Standard | |
| Sensor touring racks (120V) | Standard | |
| Sensor portable packs (120V) | Field configurable | |
| DRd racks (120V) | Field configurable | |
| DRd racks (277V) | Standard | |
| DR racks | ||
| L86 racks | Standard | |
| SmartBar | ||
| Echo Relay Panel | ||
| SensorIQ | Standard | Special order |
SmartBar and SmartModule
ETC dimming products which control only a single circuit, such as ES750, Foundry UFD, and LMI SD series dimmers, are an exception. These are only designed to take a true single-phase supply.
Sensor
DRd
DR
L86
SmartBar and SmartModule
SmartPack
ES750, Foundry UFD, and LMI SD series
True
- SmartBar
- SmartModule
- ES750
- Foundry dimmers
- LMI SD series
Rack Conversions
Field conversions
Factory conversions
Updating configurations