{"id":254792,"date":"2024-10-19T16:50:17","date_gmt":"2024-10-19T16:50:17","guid":{"rendered":"https:\/\/pdfstandards.shop\/product\/uncategorized\/bs-en-60255-1272014\/"},"modified":"2024-10-25T12:16:15","modified_gmt":"2024-10-25T12:16:15","slug":"bs-en-60255-1272014","status":"publish","type":"product","link":"https:\/\/pdfstandards.shop\/product\/publishers\/bsi\/bs-en-60255-1272014\/","title":{"rendered":"BS EN 60255-127:2014"},"content":{"rendered":"

This part of IEC 60255 specifies minimum requirements for over\/under voltage relays. The standard includes specification of the protection function, measurement characteristics and time delay characteristics.<\/p>\n

This standard defines the influencing factors that affect the accuracy under steady state conditions and performance characteristics during dynamic conditions. The test methodologies for verifying performance characteristics and accuracy are also included in this standard.<\/p>\n

The over\/under voltage functions covered by this standard are as follows:<\/p>\n

The general requirements for measuring relays and protection equipment are specified in IEC 60255-1.<\/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
PDF Pages<\/th>\nPDF Title<\/th>\n<\/tr>\n
5<\/td>\nAnnex ZA (normative) Normative references to international publications with their corresponding European publications <\/td>\n<\/tr>\n
6<\/td>\nEnglish
CONTENTS <\/td>\n<\/tr>\n
8<\/td>\n1 Scope
2 Normative references
3 Terms and definitions <\/td>\n<\/tr>\n
10<\/td>\n4 Specification of the function
4.1 General
4.2 Input energising quantities\/Energising 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
Figure 2 \u2013 Overvoltage independent time characteristic <\/td>\n<\/tr>\n
12<\/td>\nFigure 3 \u2013 Undervoltage independent time characteristic <\/td>\n<\/tr>\n
13<\/td>\nFigure 4 \u2013 Dependent time characteristic for overvoltage protection <\/td>\n<\/tr>\n
14<\/td>\nFigure 5 \u2013 Dependent time characteristic for undervoltage protection <\/td>\n<\/tr>\n
16<\/td>\n4.5 Binary output signals
Figure 6 \u2013 Definite time reset characteristic
Figure 7 \u2013 Definite time reset characteristic (alternative solution with instantaneous reset after relay operation) <\/td>\n<\/tr>\n
17<\/td>\n5 Performance specification
5.1 Accuracy related to the characteristic quantity
5.2 Accuracy related to the operate time <\/td>\n<\/tr>\n
18<\/td>\n5.3 Accuracy related to the reset time
5.4 Transient performance
5.5 Voltage transformer requirements
6 Functional test methodology
6.1 General <\/td>\n<\/tr>\n
19<\/td>\n6.2 Determination of steady state errors related to the characteristic quantity <\/td>\n<\/tr>\n
20<\/td>\n6.3 Determination of steady state errors related to the start and operate time <\/td>\n<\/tr>\n
21<\/td>\n6.4 Determination of steady state errors related to the reset time
Tables
Table 1 \u2013 Test points for overvoltage elements
Table 2 \u2013 Test points for undervoltage elements <\/td>\n<\/tr>\n
22<\/td>\n6.5 Determination of transient performance
Table 3 \u2013 Test points for overvoltage elements
Table 4 \u2013 Test points for undervoltage elements <\/td>\n<\/tr>\n
23<\/td>\n7 Documentation requirements
7.1 Type test report
Figure 8 \u2013 Test waveform
Table 5 \u2013 Recommended values for the test <\/td>\n<\/tr>\n
24<\/td>\n7.2 Other user documentation <\/td>\n<\/tr>\n
25<\/td>\nAnnex A (informative) Reset time determination for relays with trip output only
Figure A.1 \u2013 Dependent reset time determination <\/td>\n<\/tr>\n
26<\/td>\nBibliography <\/td>\n<\/tr>\n<\/table>\n","protected":false},"excerpt":{"rendered":"

Measuring relays and protection equipment – Functional requirements for over\/under voltage 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>\n2014<\/td>\n28<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n","protected":false},"featured_media":254796,"template":"","meta":{"rank_math_lock_modified_date":false,"ep_exclude_from_search":false},"product_cat":[512,2641],"product_tag":[],"class_list":{"0":"post-254792","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\/254792","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\/254796"}],"wp:attachment":[{"href":"https:\/\/pdfstandards.shop\/wp-json\/wp\/v2\/media?parent=254792"}],"wp:term":[{"taxonomy":"product_cat","embeddable":true,"href":"https:\/\/pdfstandards.shop\/wp-json\/wp\/v2\/product_cat?post=254792"},{"taxonomy":"product_tag","embeddable":true,"href":"https:\/\/pdfstandards.shop\/wp-json\/wp\/v2\/product_tag?post=254792"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}