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BS EN IEC 60076-22-5:2021

BS EN IEC 60076-22-5:2021

$142.49

Power transformers – Power transformer and reactor fittings. Electric pumps for transformers

Published By Publication Date Number of Pages
BSI 2021 30
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This part of IEC 60076 covers electric pumps used in the cooling circuits of power transformers and reactors. It applies to electric pumps mounted on liquid immersed power transformers according to IEC 60076-1 and reactors according to IEC 60076-6 with and without conservator for indoor or outdoor installation.

It outlines the operation requirements for the electrical and hydraulic performance, mechanical design, routine testing and type testing. Additionally, performance and dimensions of preferred sizes of pump sets are specified in informative annexes.

The pumps covered in this document are rotodynamic pumps driven by a squirrel cage induction motor that is immersed in the insulating liquid.

Pump sets conforming to this document can be of in-line or end suction design.

PDF Catalog

PDF Pages PDF Title
2 undefined
5 Annex ZA(normative)Normative references to international publicationswith their corresponding European publications
7 English
CONTENTS
9 FOREWORD
11 1 Scope
2 Normative references
12 3 Terms and definitions
4 Service conditions
4.1 General
13 4.2 Degree of protection of electrical components (IP)
4.3 External corrosion protection
4.4 Internal corrosion protection
4.5 Insulating liquid characteristics
5 General characteristics and requirements
5.1 Rating plate information
14 5.2 Direction of liquid flow and rotation
5.3 General mechanical requirements
5.4 Casing or enclosure
15 5.5 Terminal box
5.6 Materials
5.7 Preferred sizes
5.8 Performance requirements
5.8.1 General
16 5.8.2 Hydraulic performance
5.8.3 Hydraulic interchangeability
Figures
Figure 1 – Hydraulic interchangeability across the allowable operating range
17 5.8.4 Electrical performance
Figure 2 – Hydraulic interchangeability across an actual flow range
18 5.8.5 Noise
5.9 Tests
5.9.1 General
5.9.2 List of tests
5.9.3 Routine tests
19 5.9.4 Type tests
20 5.9.5 Special tests
21 Annex A (informative)Preferred sizes of end suction pumps
Figure A.1 – Dimensions of end suction pumps
22 Table A.1 – Dimensions of preferred sizes of end suction pumps (mm)
23 Annex B (informative)Preferred sizes of in-line pumps
Figure B.1 – Dimensions of in-line pumps
Table B.1 – Dimensions of preferred sizes of in-line pumps (mm)
24 Annex C (informative)Information required with enquiry, proposal and purchase order
25 Annex D (informative)Example of use of hydraulic interchangeability tolerances
Figure D.1 – Pressure-flow characteristics
26 Figure D.2 – Tolerances as given in 5.8.3 applied to pump A
27 Figure D.3 – Pressure-flow characteristic of pump B superimposed on the characteristic of pump A
Figure D.4 – Pressure-flow characteristic of pumps C and D superimposed on the characteristic of pump A
28 Figure D.5 – Flow ranges
29 Bibliography

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BS EN IEC 60076-22-5:2021
$142.49