GE EPM 5200, EPM 5350 EPM 5300 Series Meters AC Power Measurement, Single Phase System

GE Consumer & Industrial

Multilin

EPM 5300 Series Meters

Chapter 1: AC Power

Measurement

The economics of electric power distribution networking dictate several configurations of AC power transmission. The number of phases and voltage levels characterize these configurations.

1.1Single Phase System

A single phase system is a basic two-wire system used in low power distribution applications, such as residential communities or offices. Typically, the voltage is 120V AC. For higher power requirements, such as small commercial facilities, the typical power configuration is two lines of 120V AC opposite in phase (see Figure 1.1 B, below).

This system produces 120 volts from line to neutral for lighting and small appliance use. The line-to-line voltage is 240V AC, used for higher loads such as water heaters, electric dryers, ranges and machinery.

A )

S in g le P h a s e 2 W ir e s

B )

S in g le P h a s e 3 W ir e s

L i n e

N e u t r a l L in e 1

N e u t r a l

L in e 2

FIGURE 1–1: Single Phase System: (A) Two-Wire, (B) Three-Wire

EPM 5300 SERIES ADVANCED POWER METERS – INSTRUCTION MANUAL 1–1