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BS EN IEC 60475:2022 – TC 2023

$217.84

Tracked Changes. Method of sampling insulating liquids

Published By Publication Date Number of Pages
BSI 2023 82
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This document is applicable to the sampling procedure used for insulating liquids in delivery containers and in electrical equipment such as power and instrument transformers, reactors, bushings, oil-filled cables, oil-filled tank-type capacitors, switchgear and load tap changers (LTCs). This document applies to liquids the viscosity of which at the sampling temperature is less than 1 500 mm2/s (or cSt). It applies to mineral oils and non-mineral oils (such as synthetic esters, natural esters, vegetable oils or silicones).

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48 undefined
51 Annex ZA (normative)Normative references to international publicationswith their corresponding European publications
53 English
CONTENTS
54 FOREWORD
56 INTRODUCTION
57 1 Scope
2 Normative references
3 Terms and definitions
58 4 General principles for the sampling of insulating liquids
4.1 New insulating liquids in delivery containers
4.1.1 Place of sampling
4.1.2 Quantity of sample to be taken
4.1.3 Sampling equipment
59 Figure 1 – Thief dipper
60 Figure 2 – Cream dipper
61 Figure 3 – Pipette
Figure 4 – Siphon
62 4.1.4 Sampling procedure
Table 1 – Types of samples of new insulating liquids
64 4.2 Sampling of oil from oil-filled equipment
4.2.1 General remarks
66 Figure 5 – Sampling of oil by syringe
67 Figure 6 – Sampling of oil by ampoule
68 Figure 7 – Sampling of oil by bottle
69 Table 2 – Sample containers for oil tests
70 4.2.2 Sampling of oil by syringe
71 4.2.3 Sampling of oil by ampoule
72 4.2.4 Sampling of oil by flexible metal bottles
73 4.2.5 Sampling of oil by glass and rigid metal bottles
74 4.2.6 Sampling of oil by plastic bottles
4.3 Storage and transportation of samples
4.4 Labelling of samples
75 Table 3 – Information required on oil sample labels
76 Annex A (informative) Procedure for sampling at intermediate levels (making up of the average sample)
A.1 Use of the thief dipper
A.2 Use of the pipette
A.3 Use of the siphon
A.4 General remark
77 Annex B (informative) Procedure for testing the integrity of the syringes
78 Annex C (informative) Procedure for sampling oil from bushings
80 Bibliography
BS EN IEC 60475:2022 - TC 2023
$217.84