{"id":252711,"date":"2024-10-19T16:41:13","date_gmt":"2024-10-19T16:41:13","guid":{"rendered":"https:\/\/pdfstandards.shop\/product\/uncategorized\/bsi-15-30320260-dc\/"},"modified":"2024-10-25T12:01:13","modified_gmt":"2024-10-25T12:01:13","slug":"bsi-15-30320260-dc","status":"publish","type":"product","link":"https:\/\/pdfstandards.shop\/product\/publishers\/bsi\/bsi-15-30320260-dc\/","title":{"rendered":"BSI 15\/30320260 DC"},"content":{"rendered":"

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
PDF Pages<\/th>\nPDF Title<\/th>\n<\/tr>\n
1<\/td>\n30320260 <\/td>\n<\/tr>\n
10<\/td>\n14_807e_CD
1 Scope
2 Normative references
3 Terms and definitions <\/td>\n<\/tr>\n
12<\/td>\n4 Symbols and abbreviations <\/td>\n<\/tr>\n
14<\/td>\n5 Effect of loading beyond nameplate rating
5.1 Introduction <\/td>\n<\/tr>\n
15<\/td>\n5.2 General consequences
5.3 Effects and hazards of short-time emergency loading <\/td>\n<\/tr>\n
16<\/td>\n5.4 Effects of long-time emergency loading <\/td>\n<\/tr>\n
17<\/td>\n5.5 Transformer size <\/td>\n<\/tr>\n
18<\/td>\n6 Relative ageing rate and transformer insulation life
6.1 General
6.2 Insulation life <\/td>\n<\/tr>\n
23<\/td>\n6.3 Relative ageing rate <\/td>\n<\/tr>\n
24<\/td>\n6.4 Loss-of-life calculation <\/td>\n<\/tr>\n
25<\/td>\n7 Limitations
7.1 Temperature limitations <\/td>\n<\/tr>\n
26<\/td>\n7.2 Current limitations
7.3 Specific limitations for distribution transformers
7.3.1 Current and temperature limitations
7.3.2 Accessory and other considerations
7.3.3 Indoor transformers
7.3.4 Outdoor ambient conditions <\/td>\n<\/tr>\n
27<\/td>\n7.4 Specific limitations for medium-power transformers
7.4.1 Current and temperature limitations
7.4.2 Accessory, associated equipment and other considerations
7.4.3 Short-circuit withstand requirements
7.4.4 Voltage limitations
7.5 Specific limitations for large power transformers
7.5.1 General <\/td>\n<\/tr>\n
28<\/td>\n7.5.2 Current and temperature limitations
7.5.3 Accessory, equipment and other considerations
7.5.4 Short-circuit withstand requirements
7.5.5 Voltage limitations <\/td>\n<\/tr>\n
29<\/td>\n8 Determination of temperatures
8.1 Hot-spot temperature rise in steady state
8.1.1 General
8.1.2 Calculation of hot-spot temperature rise from normal heat-run test data <\/td>\n<\/tr>\n
31<\/td>\n8.1.3 Direct measurement of hot-spot temperature rise <\/td>\n<\/tr>\n
34<\/td>\n8.1.4 Hot-spot factor <\/td>\n<\/tr>\n
36<\/td>\n8.2 Top-oil and hot-spot temperatures at varying ambient temperature and load conditions
8.2.1 General <\/td>\n<\/tr>\n
37<\/td>\n8.2.2 Exponential equations solution <\/td>\n<\/tr>\n
42<\/td>\n8.2.3 Difference equations solution <\/td>\n<\/tr>\n
44<\/td>\n8.3 Ambient temperature
8.3.1 Outdoor air-cooled transformers
8.3.2 Correction of ambient temperature for transformer enclosure <\/td>\n<\/tr>\n
45<\/td>\n8.3.3 Water-cooled transformers
9 Influence of tap changers
9.1 General <\/td>\n<\/tr>\n
46<\/td>\n9.2 Short-circuit losses
9.3 Ratio of losses
9.4 Load factor <\/td>\n<\/tr>\n
47<\/td>\nAnnex A (informative) Ageing Relative ageing rate considering oxygen and water effect
A.1 Insulation life expectancy <\/td>\n<\/tr>\n
49<\/td>\nA.2 Relative ageing rate considering oxygen and water effect <\/td>\n<\/tr>\n
51<\/td>\nAnnex B (informative) Core temperature
B.1 Introduction
B.2 Core hot-spot locations <\/td>\n<\/tr>\n
52<\/td>\nAnnex C (informative) Specification of loading beyond rated power <\/td>\n<\/tr>\n
54<\/td>\nAnnex D (informative) Description of Q, S and H factors <\/td>\n<\/tr>\n
57<\/td>\nAnnex E (informative) Calculation of winding and oil time constant <\/td>\n<\/tr>\n
59<\/td>\nAnnex F (informative) Thermal model parameters
F.1 Introduction
F.2 Thermal constant estimation: experimental approach <\/td>\n<\/tr>\n
62<\/td>\nF.3 Dynamic thermal modelling: further development <\/td>\n<\/tr>\n
63<\/td>\nAnnex G (informative) Practical example of the exponential equations method
G.1 Introduction <\/td>\n<\/tr>\n
64<\/td>\nG.2 Time period 0 min to 190 min
G.3 Time period 190 min to 365 min <\/td>\n<\/tr>\n
65<\/td>\nG.4 Time period 365 min to 500 min
G.5 Time period 500 min to 705 min <\/td>\n<\/tr>\n
66<\/td>\nG.6 Time period 705 min to 730 min
G.7 Time period 730 min to 745 min
G.8 Comparison with measured values <\/td>\n<\/tr>\n
69<\/td>\nAnnex H (informative) Application of the difference equation solution method
H.1 Introduction
H.2 Example <\/td>\n<\/tr>\n
74<\/td>\nH.6 Use of measured top-oil temperature <\/td>\n<\/tr>\n
75<\/td>\nAnnex I (informative) Flowchart, based on the example in Annex G <\/td>\n<\/tr>\n
77<\/td>\nAnnex J (informative) Example of calculating and presenting overload data <\/td>\n<\/tr>\n
81<\/td>\nAnnex K (informative) Geomagnetic induced currents <\/td>\n<\/tr>\n
82<\/td>\nBibliography <\/td>\n<\/tr>\n<\/table>\n","protected":false},"excerpt":{"rendered":"

BS EN 60076-7. Power transformers. Part 7. Loading guide for liquid-immersed power transformers<\/b><\/p>\n\n\n\n\n
Published By<\/td>\nPublication Date<\/td>\nNumber of Pages<\/td>\n<\/tr>\n
BSI<\/b><\/a><\/td>\n2015<\/td>\n85<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n","protected":false},"featured_media":252715,"template":"","meta":{"rank_math_lock_modified_date":false,"ep_exclude_from_search":false},"product_cat":[2641],"product_tag":[],"class_list":{"0":"post-252711","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\/252711","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\/252715"}],"wp:attachment":[{"href":"https:\/\/pdfstandards.shop\/wp-json\/wp\/v2\/media?parent=252711"}],"wp:term":[{"taxonomy":"product_cat","embeddable":true,"href":"https:\/\/pdfstandards.shop\/wp-json\/wp\/v2\/product_cat?post=252711"},{"taxonomy":"product_tag","embeddable":true,"href":"https:\/\/pdfstandards.shop\/wp-json\/wp\/v2\/product_tag?post=252711"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}