The Institute for Standardization of Bosnia and Herzegovina, through its Technical Committee BAS/TC 56, Conventional and Alternative Power Sources, has adopted the second edition of BAS ISO 20816-5: 2020, Mechanical vibration - Measurement and evaluation of machine vibration - Part 5: Machine sets in hydraulic power generating and pump-storage plants.

BAS ISO 20816-5: 2020 This document provides guidelines for evaluating the vibration measurements made at the bearings, bearing pedestals or bearing housings and also for evaluating relative shaft vibration measurements made on machine sets in hydraulic power generating and pump-storage plants when the machine is operating within its normal operating range.

This document is applicable to machine sets in hydraulic power generating plants and in pump-storage plants with typical rotational speeds of 60 r/min to 1 000 r/min fitted with shell or pad (shoe) type oil-lubricated bearings.

The current database includes machine speeds ranging from 60 r/min to 750 r/min (with a very small sample of 1 000 r/min machines).

This document defines different limit values of bearing housing and shaft vibration depending on the type of turbine, the orientation of the shaft (i.e. horizontal or vertical) and for each of the bearing locations.

This document is based on statistical analysis and provides criteria for the most common types of turbines, pump-turbines and pumps. For specific information on which types of units are covered in this document, see Annex A.

Machine sets covered by this document can have the following configurations:

a) generators driven by hydraulic turbines;

b) motor-generators driven by pump-turbines;

c) motor-generators driven by hydraulic turbines and separate pumps;

d) pumps driven by electric motors.

This document is not applicable to the following unit configurations, parameters and operating conditions:

-        hydraulic machines with water-lubricated bearings;

-         hydraulic machines or machine sets having rolling element bearings (for these machines, see IEC 62006 and/or ISO 10816‑3);

-        pumps in thermal power plants or industrial installations (for these machines, see ISO 10816‑7);

-         electrical machines operating as motors except for the use of these machines in pump-storage applications;

-         hydro generators operating as synchronous condensers (with the water in the turbine depressed by compressed air);

The original texts of these European standards were prepared by the Technical Committee ISO/IEC/TC 4, Hydraulic Turbines, whose secretariat is held by the Standards Council of Canada (SCC).