The warning icon indicates the presence of a hazard which could result inpersonal injury.The caution icon indicates important information or warning related to theconcept discussed in the text. It might indicate the presence of a hazard whichcould result in corruption of software or damage to equipment or property.The information icon alerts the reader of important facts and conditions.The tip icon indicates advice on, for example, how to design your project orhow to use a certain function.Although warning hazards are related to personal injury, it is necessary to understand thatunder certain operational conditions, operation of damaged equipment may result indegraded process performance leading to personal injury or death. Therefore, comply fullywith all warning and caution notices.1.4.2 Document conventions GUID-37C3ACF4-BD79-43C6-B37E-24B38EE69301 v2A particular convention may not be used in this manual.• Abbreviations and acronyms in this manual are spelled out in the glossary. The glossaryalso contains definitions of important terms.• Push button navigation in the LHMI menu structure is presented by using the push buttonicons.For example, to navigate the options, use and .• HMI menu paths are presented in bold.For example, select Main menu/Settings.• Signal names are presented in bold.The signal 21120_EXT_TEST_TRIP can be set and reset via the LHMI Test Trip menu.• Parameter names and parameter values are presented in italics.For example, the default value of theOperation setting isNot inverted.• Section references are presented with the respective section numbers.For example, see Section 1.4.2 for more details about document conventions.Section 1 1MRK 505 399-UEN BIntroduction8 Distributed busbar protection REB500Application manual© Copyright 2019 ABB. All rights reserved
