ISO 20958:2013 PDF

Name: ISO 20958:2013 — Condition monitoring and diagnostics of machine systems — Electrical signature analysis of three-phase induction motors
SKU: ISO 20958:2013
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Condition monitoring and diagnostics of machine systems — Electrical signature analysis of three-phase induction motors

Название (английский):

ISO 20958:2013

Condition monitoring and diagnostics of machine systems — Electrical signature analysis of three-phase induction motors

Статус документа:: Действующий
Формат:: Электронный (PDF)
Количество страниц:: 24
Дата публикации:: 12 августа 2013 г.
Издание:: ISO IS 20958 edition 1 version 1
ICS:: 17.160

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Описание (английский):

ISO 20958:2013 sets out guidelines for the online techniques recommended for the purposes of condition monitoring and diagnostics of machines, based on electrical signature analysis. ISO 20958:2013 is applicable to three-phase induction motors.

Abstract

Похожие стандарты

Упомянутые в описании и другие стандарты ISO

Overview

ISO 20958:2013 - Condition monitoring and diagnostics of machine systems - provides authoritative guidance for online electrical signature analysis (ESA) of three‑phase induction motors. Published by ISO, the standard describes accepted techniques for extracting diagnostic information from electrical measurements at motor terminals or via fitted transducers. It is applicable to both squirrel‑cage and wound‑rotor induction motors and is intended to provide early warning of motor or driven‑equipment faults.

Key topics

Stator current analysis (Current Signature Analysis, CSA)

Measurement and spectral analysis of supply currents to detect rotor cage defects (broken bars, cracked end rings), eccentricity, bearing defects, misalignment, and stator winding problems.
Sideband components appear close to the mains frequency and can be 0.3–3 Hz away and typically 100–1 000 times smaller than the fundamental - requiring high dynamic range and frequency resolution.
Guidance on interpreting results and differentiating motor faults from driven‑equipment effects (e.g., gearbox sidebands) and on testing at different loads.

Voltage, power and multi‑phase analysis

Techniques that analyse all three phases and the relation between current and voltage for enhanced diagnostics.

Magnetic flux and rotor current analysis

Use of flux and rotor‑side information to complement stator current analysis.

Partial discharge (PD) analysis

Online PD detection methods for stator insulation assessment; recommendations include locking converter frequency/voltage when testing inverter‑fed motors.

Electromagnetic interference (EMI) testing and shaft voltage analysis

Methods to detect EMI issues and shaft voltage conditions that can lead to bearing damage.

Analytical approaches

Mention of Park’s vector approach (informative annex) and spectral/processing considerations for robust fault detection.

Practical applications

Online condition monitoring programs for industrial plants (pulp & paper, mining, petrochemical, manufacturing).

Predictive maintenance and asset management to reduce unplanned downtime and extend motor life.

Root‑cause analysis when vibration or mechanical diagnostics indicate anomalies - CSA can confirm rotor, winding, or drive‑train issues.

Commissioning and acceptance testing of motors and motor drives, especially when assessing insulation health or converter‑related spectral components.

Related standards

ISO 13372 - Condition monitoring and diagnostics of machines: vocabulary (normative reference cited by ISO 20958:2013).

Keywords: ISO 20958:2013, electrical signature analysis, condition monitoring, three‑phase induction motors, current signature analysis, rotor bar detection, partial discharge, Park’s vector.

ISO 20958:2013 PDF

Abstract

Похожие стандарты

Overview

Key topics

Practical applications

Who should use this standard

Related standards

Технические детали

ISO 13372:2004

Condition monitoring and diagnostics of machines — Vocabulary

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