ISO 20816-5-2018 PDF

Full title and description

ISO 20816-5:2018 — Mechanical vibration — Measurement and evaluation of machine vibration — Part 5: Machine sets in hydraulic power generating and pump‑storage plants. This part of ISO 20816 gives practical guidelines for measuring and evaluating vibration of bearing housings/ bearing pedestals and relative (radial) shaft vibration for machine sets in hydraulic power and pump‑storage plants, and defines evaluation criteria and limit values for typical turbine and pump‑turbine configurations when operating within their normal operating range.

Abstract

Provides measurement locations, permitted instrumentation and data processing recommendations, plus statistically derived evaluation limits and trend‑analysis guidance for machine sets with oil‑lubricated shell or pad-type bearings (typical speeds ~60–1 000 r/min; database mainly 60–750 r/min). It also lists configurations covered (generators driven by hydraulic turbines, motor‑generators with pump‑turbines, pumps driven by motors, etc.) and expressly excludes certain bearings, operating conditions and vibration types.

General information

• Status: Published / Confirmed (current international standard).
• Publication date: 20 July 2018.
• Publisher: International Organization for Standardization (ISO).
• ICS / categories: 29.160.40 (Generating sets); 17.160 (Vibrations, shock and vibration measurements).
• Edition / version: Edition 1.0 (2018).
• Number of pages: 53 pages.

Scope

Applicable to in‑situ vibration measurement and evaluation of machine sets in hydraulic power generating and pump‑storage plants fitted with oil‑lubricated shell or pad (shoe) bearings, for normal operating ranges defined in Annex A. Defines different limit values depending on turbine type, shaft orientation and bearing location. Not applicable to water‑lubricated bearings, machines with rolling‑element bearings, pumps in thermal/industrial plants, axial vibration assessment, transient/non‑synchronous conditions or stator core/frame vibration assessment; such cases require other standards or special investigation.

Key topics and requirements

• Measurement locations and directions: specified bearing housing and shaft radial measurement points and recommended measurement practices.
• Evaluation criteria: numerical limit values for bearing housing and shaft vibration by turbine type and bearing location, intended as guideline/action levels.
• Two complementary purposes: (A) prevent damage from excessive vibration magnitudes and (B) monitor changes in vibration for diagnosis/prognosis (trend analysis).
• Data processing and instrumentation: recommended signal processing, filtering and instrumentation considerations for reliable comparisons with limits.
• Exclusions and special cases: lists operating conditions and machine configurations outside the standard’s applicability that require alternative methods or standards.

Typical use and users

Used by condition‑monitoring and vibration engineers, hydropower plant operators and maintenance teams, OEMs of turbines and hydro generators, reliability engineers and asset managers for acceptance testing, routine condition monitoring, fault diagnosis and maintenance planning in hydro and pump‑storage installations.

Related standards

Part of the broader ISO 20816 series (general vibration evaluation guidance). Other related/relevant documents include ISO 20816‑1 (general requirements), ISO 10816 family and IEC 62006 for machines with rolling‑element bearings, and ISO 10816‑7 for pumps in thermal/industrial plants — consult the specific parts when the machine type or bearing/operating conditions fall outside ISO 20816‑5’s scope.

Keywords

mechanical vibration, vibration measurement, vibration evaluation, bearing housing vibration, shaft vibration, hydropower, pump‑storage, turbine vibration, condition monitoring, vibration limits

FAQ

Q: What is this standard?

A: ISO 20816‑5:2018 is the ISO standard providing measurement and evaluation guidelines for vibration of machine sets in hydraulic power generating and pump‑storage plants (bearing housing and relative shaft vibration).

Q: What does it cover?

A: It covers in‑situ vibration measurements at bearings/ bearing housings and relative radial shaft vibration for typical hydro machine sets with oil‑lubricated shell or pad bearings, including recommended measurement practice, data processing and statistically based evaluation limits for normal operating ranges. It excludes water‑lubricated bearings, rolling‑element bearing machines, axial vibration assessment, transients and other special cases.

Q: Who typically uses it?

A: Vibration/condition monitoring engineers, hydropower plant operators, maintenance and reliability teams, OEMs, consultants and asset managers involved with turbines, pump‑turbines, hydro generators and pumps in pump‑storage plants.

Q: Is it current or superseded?

A: ISO 20816‑5:2018 is a current published international standard (first edition 2018). Check with your national standards body or ISO for any amendments or revisions after 2018 before use in contract or regulatory situations.

Q: Is it part of a series?

A: Yes — it is one part of the ISO 20816 series on measurement and evaluation of machine vibration; users should refer to ISO 20816‑1 for general principles and to other parts or related standards where the machine type or bearing/operating condition falls outside this part’s scope.

Q: What are the key keywords?

A: Mechanical vibration, bearing housing vibration, shaft vibration, hydropower, pump‑storage plants, condition monitoring, vibration limits.