{"id":254730,"date":"2024-10-19T16:50:00","date_gmt":"2024-10-19T16:50:00","guid":{"rendered":"https:\/\/pdfstandards.shop\/product\/uncategorized\/bs-en-60255-1512009\/"},"modified":"2024-10-25T12:15:52","modified_gmt":"2024-10-25T12:15:52","slug":"bs-en-60255-1512009","status":"publish","type":"product","link":"https:\/\/pdfstandards.shop\/product\/publishers\/bsi\/bs-en-60255-1512009\/","title":{"rendered":"BS EN 60255-151:2009"},"content":{"rendered":"

IEC 60255-151:2009 specifies minimum requirements for over\/under current relays. It includes a specification of the protection function, measurement characteristics and time delay characteristics. Defines the influencing factors that affect the accuracy under steady state conditions and performance characteristics during dynamic conditions.<\/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
PDF Pages<\/th>\nPDF Title<\/th>\n<\/tr>\n
6<\/td>\nEnglish
CONTENTS <\/td>\n<\/tr>\n
8<\/td>\n1 Scope and object
2 Normative references
3 Terms and definitions <\/td>\n<\/tr>\n
10<\/td>\n4 Specification of the function
4.1 General
4.2 Input Energizing quantities \/ energizing quantities
Figures
Figure 1 \u2013 Simplified protection function block diagram <\/td>\n<\/tr>\n
11<\/td>\n4.3 Binary input signals
4.4 Functional logic <\/td>\n<\/tr>\n
12<\/td>\nFigure 2 \u2013 Overcurrent independent time characteristic
Figure 3 \u2013 Undercurrent independent time characteristic <\/td>\n<\/tr>\n
13<\/td>\nFigure 4 \u2013 Dependent time characteristic <\/td>\n<\/tr>\n
15<\/td>\nFigure 5 \u2013 Definite time reset characteristic <\/td>\n<\/tr>\n
16<\/td>\nFigure 6 \u2013 Definite time reset characteristic (alternative solution with instantaneous reset after relay operation) <\/td>\n<\/tr>\n
17<\/td>\nFigure 7 \u2013 Dependent time reset characteristic <\/td>\n<\/tr>\n
18<\/td>\n4.5 Binary output signals
4.6 Additional influencing functions\/conditions
4.7 Specific characteristics
Figure 8 \u2013 Dependent time reset characteristic (alternative solution with instantaneous reset after relay operation) <\/td>\n<\/tr>\n
19<\/td>\n5 Performance specification
5.1 Accuracy related to the characteristic quantity
Figure 9 \u2013 Voltage restrained characteristics
Figure 10 \u2013 Voltage controlled characteristics <\/td>\n<\/tr>\n
20<\/td>\n5.2 Accuracy related to the operate time
5.3 Accuracy related to the reset time
Tables
Table 1 \u2013 Multiplier factor on operated time assigned error <\/td>\n<\/tr>\n
21<\/td>\n5.4 Transient performance
5.5 Current transformer requirements
Table 2 \u2013 Multiplier factor on reset time assigned error <\/td>\n<\/tr>\n
22<\/td>\n6 Functional test methodology
6.1 General
6.2 Determination of steady state errors related to the characteristic quantity <\/td>\n<\/tr>\n
25<\/td>\n6.3 Determination of steady state errors related to the start and operate time
6.4 Determination of steady state errors related to the reset time
Table 3 \u2013 Test points for overcurrent elements
Table 4 \u2013 Test points for undercurrent elements <\/td>\n<\/tr>\n
26<\/td>\n6.5 Determination of transient performance
Table 5 \u2013 Test points for overcurrent elements
Table 6 \u2013 Test points for undercurrent elements <\/td>\n<\/tr>\n
27<\/td>\nFigure 11 \u2013 Typical test waveform for transient overreach <\/td>\n<\/tr>\n
28<\/td>\nFigure 12 \u2013 Test waveform
Table 7 \u2013 Recommended values for the test <\/td>\n<\/tr>\n
29<\/td>\n7 Documentation requirements
7.1 Type test report
7.2 Other user documentation <\/td>\n<\/tr>\n
31<\/td>\nAnnex A (normative) Constants for dependent time operating and reset characteristics
Table A.1 \u2013 Constants for dependent time operating and reset characteristics <\/td>\n<\/tr>\n
32<\/td>\nAnnex B (informative) Reset time determination for relays with trip output only
Figure B.1 \u2013 Dependent reset time determination <\/td>\n<\/tr>\n
33<\/td>\nBibliography <\/td>\n<\/tr>\n<\/table>\n","protected":false},"excerpt":{"rendered":"

Measuring relays and protection equipment – Functional requirements for over\/under current protection<\/b><\/p>\n\n\n\n\n
Published By<\/td>\nPublication Date<\/td>\nNumber of Pages<\/td>\n<\/tr>\n
BSI<\/b><\/a><\/td>\n2010<\/td>\n36<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n","protected":false},"featured_media":254734,"template":"","meta":{"rank_math_lock_modified_date":false,"ep_exclude_from_search":false},"product_cat":[512,2641],"product_tag":[],"class_list":{"0":"post-254730","1":"product","2":"type-product","3":"status-publish","4":"has-post-thumbnail","6":"product_cat-29-120-70","7":"product_cat-bsi","9":"first","10":"instock","11":"sold-individually","12":"shipping-taxable","13":"purchasable","14":"product-type-simple"},"_links":{"self":[{"href":"https:\/\/pdfstandards.shop\/wp-json\/wp\/v2\/product\/254730","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\/254734"}],"wp:attachment":[{"href":"https:\/\/pdfstandards.shop\/wp-json\/wp\/v2\/media?parent=254730"}],"wp:term":[{"taxonomy":"product_cat","embeddable":true,"href":"https:\/\/pdfstandards.shop\/wp-json\/wp\/v2\/product_cat?post=254730"},{"taxonomy":"product_tag","embeddable":true,"href":"https:\/\/pdfstandards.shop\/wp-json\/wp\/v2\/product_tag?post=254730"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}