IEC TR 60664-2-2-2002 PDF

Full title and description

St IEC TR 60664-2-2-2002 — Insulation coordination for equipment within low-voltage systems - Part 2-2: Interface considerations - Application guide. This Technical Report provides guidance on the kinds, magnitudes, durations and frequencies of surge overvoltages on low-voltage installations and equipment, interaction between power and communication systems, and practical recommendations for insulation coordination and surge protection at interfaces.

Abstract

This technical report explains interface-related considerations for insulation coordination in low-voltage equipment, focusing on surge and temporary overvoltages (including lightning-related and interaction-induced surges), principles for coordinating surge protective devices (SPDs) with equipment, and guidance on protective-control strategies and risk/availability trade-offs. It is intended as an application guide rather than a normative test standard.

General information

• Status: Published (Technical Report).
• Publication date: 22 January 2002 (IEC TR 60664-2-2:2002).
• Publisher: International Electrotechnical Commission (IEC), TC 109.
• ICS / categories: 29.080.30 (Insulation systems / Insulation coordination).
• Edition / version: Edition 1.0 (2002) — Technical Report.
• Number of pages: 12 pages.

Scope

The report addresses interface considerations relevant to insulation coordination of equipment within low-voltage systems: it surveys types of surge overvoltages (lightning, switching, interaction with communication circuits), describes their typical magnitudes, durations and occurrence rates, and gives guidance on selecting and coordinating surge protection measures and protective-control approaches to avoid permanent damage while maintaining system availability. It is an application guide intended to supplement the normative requirements in IEC 60664-1 and related parts.

Key topics and requirements

• Classification and description of surge and temporary overvoltages affecting low-voltage equipment (lightning-induced, switching, interaction with communication circuits).
• Typical magnitudes, durations and frequencies of occurrence for different surge types and implications for insulation selection.
• Guidance on interface issues where power and communication systems interact, including risks of transferred overvoltages.
• Principles for coordination of surge protective devices (SPDs) with equipment to be protected, including interaction between multiple SPDs and failure-rate considerations.
• Recommendations on applying protective-control strategies and considering availability versus risk when specifying surge protection at system and equipment levels.

Typical use and users

Used by equipment designers, product safety engineers, test and compliance personnel, manufacturers of low-voltage equipment and surge protective devices, system integrators and utilities when assessing interface surge risks and specifying appropriate insulation and surge protection measures. (Guidance-based TR intended to support implementation of the normative parts of the IEC 60664 series.)

Related standards

Closely related to IEC 60664-1 (Principles, requirements and tests) and other parts of the IEC 60664 series (for example IEC TR 60664-2-1 and IEC 60664-3 / -4), and references coordination principles with testing/installation guidance such as IEC 61312 series where SPD coordination and performance are addressed.

Keywords

Insulation coordination, low-voltage equipment, surge overvoltage, temporary overvoltage, lightning overvoltage, surge protective device, interface considerations, protective control, TC 109.

FAQ

Q: What is this standard?

A: It is IEC TR 60664-2-2:2002 — a Technical Report (application guide) titled "Insulation coordination for equipment within low-voltage systems - Part 2-2: Interface considerations" published by the IEC.

Q: What does it cover?

A: It covers interface-related surge and temporary overvoltage phenomena, typical magnitudes and occurrence characteristics, interaction between power and communication systems, and practical guidance on coordinating surge protective devices and insulation measures to reduce permanent damage and manage availability/risk.

Q: Who typically uses it?

A: Designers, test and compliance engineers, SPD manufacturers, system integrators and utilities use this TR as guidance when specifying insulation coordination and surge protection at equipment interfaces.

Q: Is it current or superseded?

A: IEC TR 60664-2-2:2002 remains the published Technical Report from 2002; it is listed in current IEC 60664 series material and included in IEC’s consolidated series offerings. Users should check the IEC catalogue for the latest status or any subsequent updates or replacement parts.

Q: Is it part of a series?

A: Yes — it is one part of the IEC 60664 series (insulation coordination for equipment within low-voltage systems) and is intended to be used together with IEC 60664-1 and other informative/normative parts.

Q: What are the key keywords?

A: Insulation coordination; surge overvoltages; SPDs; low-voltage equipment; interface considerations; lightning; temporary overvoltages; protective control.