IEEE DRAFT C62.48 : D10 2003

Introduction
Contents
1 Overview
  1.1 Scope
  1.2 Purpose
2 References
3 Definitions
4 Power system disturbances
  4.1 Surges
  4.2 Swells
  4.3 Temporary overvoltages (TOVs)
  4.4 Notches
  4.5 Sags
  4.6 Temporary undervoltages
  4.7 Harmonics
  4.8 Noise
  4.9 Voltage Magnification
5 Interactions of power system disturbances on SPDs
  5.1 Response to voltage surges
  5.2 Response to swells
  5.3 Response to TOVs
  5.4 Response to notches
  5.5 Response to sags
  5.6 Response to temporary undervoltages
  5.7 Response to harmonics
  5.8 Response to noise
  5.9 Response to Voltage Magnification
6 Interactions of SPDs on Power System Disturbances
  6.1 Benefits for downstream and upstream loads
  6.2 Partial loss of power with voltage-switching devices
  6.3 Surge current introduction into a facility
  6.4 Voltage oscillations caused by SPDs
  6.5 Effects of inductance between SPDs
  6.6 SPD failure-mode effects on power systems
  6.7 Effects of SPD peripheral components on power systems
  6.8 Effect of added filter on neutral-ground voltage
Annex A Description of Environment (Informative)
      A.1 The steady-state environment
      A.2 Sources of power system disturbances
Annex B Bibliography (Informative)
Annex C Glossary (Informative)
      C.1 Definitions of terms used in this document

Specifies the effects on SPDs of power system disturbances occurring in these low-voltage ac power circuits. The disturbances are not limited to surges. The effects of the presence and operation of SPDs on the quality of power available to the connected loads are described. The interaction among multiple SPDs on the same circuit is also described.