{"id":253036,"date":"2024-10-19T16:42:45","date_gmt":"2024-10-19T16:42:45","guid":{"rendered":"https:\/\/pdfstandards.shop\/product\/uncategorized\/bs-en-60076-32013a12018\/"},"modified":"2024-10-25T12:03:15","modified_gmt":"2024-10-25T12:03:15","slug":"bs-en-60076-32013a12018","status":"publish","type":"product","link":"https:\/\/pdfstandards.shop\/product\/publishers\/bsi\/bs-en-60076-32013a12018\/","title":{"rendered":"BS EN 60076-3:2013+A1:2018"},"content":{"rendered":"

This International Standard applies to power transformers as defined by and in the scope of IEC 60076\u20111<\/span> <\/span>. It gives details of the applicable dielectric tests and minimum dielectric test levels. Recommended minimum external clearances in air between live parts and between live parts and earth are given for use when these clearances are not specified by the purchaser.<\/p>\n

For categories of power transformers and reactors which have their own IEC standards, this standard is applicable only to the extent in which it is specifically called up by cross reference in the other standards.<\/p>\n

PDF Catalog<\/h4>\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n
PDF Pages<\/th>\nPDF Title<\/th>\n<\/tr>\n
2<\/td>\nundefined <\/td>\n<\/tr>\n
7<\/td>\nCONTENTS <\/td>\n<\/tr>\n
9<\/td>\nFOREWORD <\/td>\n<\/tr>\n
11<\/td>\nINTRODUCTION <\/td>\n<\/tr>\n
12<\/td>\n1 Scope
2 Normative references
3 Terms and definitions <\/td>\n<\/tr>\n
13<\/td>\n4 General <\/td>\n<\/tr>\n
15<\/td>\n5 Highest voltage for equipment and rated insulation level <\/td>\n<\/tr>\n
16<\/td>\n6 Transformers with re-connectable windings <\/td>\n<\/tr>\n
17<\/td>\n7 Dielectric tests
7.1 Overview <\/td>\n<\/tr>\n
18<\/td>\n7.2 Test requirements
7.2.1 General <\/td>\n<\/tr>\n
19<\/td>\n7.2.2 Test voltage levels
Tables
Table 1 \u2013 Requirements and tests for different categories of transformers based on the Um of the highest voltage windings <\/td>\n<\/tr>\n
20<\/td>\nTable 2 \u2013 Test voltage levels (1 of 2) <\/td>\n<\/tr>\n
21<\/td>\nTable 3 \u2013 Test voltage levels used in special cases <\/td>\n<\/tr>\n
22<\/td>\n7.2.3 Test sequence
7.3 Test requirements for specific transformers
7.3.1 Tests for transformers with Um \u2264 72,5 kV <\/td>\n<\/tr>\n
23<\/td>\n7.3.2 Tests on transformers with 72,5 kV < Um \u2264 170 kV <\/td>\n<\/tr>\n
24<\/td>\n7.3.3 Tests on Transformers with Um > 170 kV <\/td>\n<\/tr>\n
25<\/td>\n7.4 Assigning Um and test voltages to the neutral terminal of a winding
7.4.1 Transformers with Um \u2264 72,5 kV
7.4.2 Transformers with Um > 72,5 kV
8 Dielectric tests on transformers that have been in service <\/td>\n<\/tr>\n
26<\/td>\n9 Insulation of auxiliary wiring (AuxW)
10 Applied voltage test (AV) <\/td>\n<\/tr>\n
27<\/td>\n11 Induced voltage tests (IVW and IVPD)
11.1 General
11.2 Induced voltage withstand test (IVW) <\/td>\n<\/tr>\n
28<\/td>\n11.3 Induced voltage test with partial discharge measurement (IVPD)
11.3.1 General
11.3.2 Test duration and frequency
11.3.3 Test sequence <\/td>\n<\/tr>\n
29<\/td>\n11.3.4 Partial discharge (PD) measurement
Figures
Figure 1 \u2013 Time sequence for the application of test voltage for induced voltage test with partial discharge measurement (IVPD) <\/td>\n<\/tr>\n
30<\/td>\n11.3.5 Test acceptance criteria
12 Line terminal AC withstand test (LTAC) <\/td>\n<\/tr>\n
31<\/td>\n13 Lightning impulse tests (LI, LIC, LIN, LIMT)
13.1 Requirements for all lightning impulse tests
13.1.1 General
13.1.2 Tap positions
13.1.3 Records of tests <\/td>\n<\/tr>\n
32<\/td>\n13.1.4 Test connections <\/td>\n<\/tr>\n
33<\/td>\n13.2 Full wave lightning impulse test (LI)
13.2.1 Wave shape, determination of test voltage value and tolerances <\/td>\n<\/tr>\n
34<\/td>\n13.2.2 Tests on transformers without non-linear elements <\/td>\n<\/tr>\n
35<\/td>\n13.2.3 Tests on transformers with non-linear elements <\/td>\n<\/tr>\n
36<\/td>\n13.3 Chopped wave lightning impulse test (LIC)
13.3.1 Wave shape
13.3.2 Tests on transformers without non-linear elements <\/td>\n<\/tr>\n
37<\/td>\n13.3.3 Tests on transformers with non-linear elements <\/td>\n<\/tr>\n
38<\/td>\n13.4 Lightning impulse test on a neutral terminal (LIN)
13.4.1 General
13.4.2 Waveshape <\/td>\n<\/tr>\n
39<\/td>\n13.4.3 Test sequence
13.4.4 Test criteria
14 Switching impulse test (SI)
14.1 General
14.2 Test connections <\/td>\n<\/tr>\n
40<\/td>\n14.3 Waveshape
14.4 Test sequence
14.5 Test criteria <\/td>\n<\/tr>\n
41<\/td>\n15 Action following test failure
16 External clearances in air
16.1 General <\/td>\n<\/tr>\n
42<\/td>\n16.2 Clearance requirements <\/td>\n<\/tr>\n
43<\/td>\nTable 4 \u2013 Minimum clearances in air (1 of 2) <\/td>\n<\/tr>\n
45<\/td>\nAnnexes
Annex A (informative) Application guide for partial discharge measurements on transformers <\/td>\n<\/tr>\n
46<\/td>\nFigure A.1 \u2013 Calibration circuit for partial discharge measurement using the test tap of condenser type bushing <\/td>\n<\/tr>\n
47<\/td>\nFigure A.2 \u2013 Circuit for partial discharge measurement using a high-voltage coupling capacitor <\/td>\n<\/tr>\n
50<\/td>\nAnnex B (informative) Overvoltage transferred from the high-voltage winding to a low-voltage winding <\/td>\n<\/tr>\n
51<\/td>\nFigure B.1 \u2013 Equivalent circuit for capacitive transfer of overvoltage <\/td>\n<\/tr>\n
52<\/td>\nAnnex C (informative) Information on transformer insulation and dielectric tests to be supplied with an enquiry and with an order <\/td>\n<\/tr>\n
55<\/td>\nAnnex D (informative) Neutral insulation voltage level calculation <\/td>\n<\/tr>\n
58<\/td>\nAnnex E (informative) Basis for dielectric tests, insulation levels and clearances <\/td>\n<\/tr>\n
61<\/td>\nBibliography <\/td>\n<\/tr>\n<\/table>\n","protected":false},"excerpt":{"rendered":"

Power transformers – Insulation levels, dielectric tests and external clearances in air<\/b><\/p>\n\n\n\n\n
Published By<\/td>\nPublication Date<\/td>\nNumber of Pages<\/td>\n<\/tr>\n
BSI<\/b><\/a><\/td>\n2018<\/td>\n64<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n","protected":false},"featured_media":253041,"template":"","meta":{"rank_math_lock_modified_date":false,"ep_exclude_from_search":false},"product_cat":[2641],"product_tag":[],"class_list":{"0":"post-253036","1":"product","2":"type-product","3":"status-publish","4":"has-post-thumbnail","6":"product_cat-bsi","8":"first","9":"instock","10":"sold-individually","11":"shipping-taxable","12":"purchasable","13":"product-type-simple"},"_links":{"self":[{"href":"https:\/\/pdfstandards.shop\/wp-json\/wp\/v2\/product\/253036","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/pdfstandards.shop\/wp-json\/wp\/v2\/product"}],"about":[{"href":"https:\/\/pdfstandards.shop\/wp-json\/wp\/v2\/types\/product"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/pdfstandards.shop\/wp-json\/wp\/v2\/media\/253041"}],"wp:attachment":[{"href":"https:\/\/pdfstandards.shop\/wp-json\/wp\/v2\/media?parent=253036"}],"wp:term":[{"taxonomy":"product_cat","embeddable":true,"href":"https:\/\/pdfstandards.shop\/wp-json\/wp\/v2\/product_cat?post=253036"},{"taxonomy":"product_tag","embeddable":true,"href":"https:\/\/pdfstandards.shop\/wp-json\/wp\/v2\/product_tag?post=253036"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}