1.4 Document symbols and conventions1.4.1 Symbols GUID-2945B229-DAB0-4F15-8A0E-B9CF0C2C7B15 v13The electrical warning icon indicates the presence of a hazardwhich could result in electrical shock.The warning icon indicates the presence of a hazard which couldresult in personal injury.The caution hot surface icon indicates important information orwarning about the temperature of product surfaces.Class 1 Laser product. Take adequate measures to protect the eyesand do not view directly with optical instruments.The caution icon indicates important information or warning relatedto the concept discussed in the text. It might indicate the presenceof a hazard which could result in corruption of software or damageto equipment or property.The information icon alerts the reader of important facts andconditions.The tip icon indicates advice on, for example, how to design yourproject or how to use a certain function.Although warning hazards are related to personal injury, it is necessary tounderstand that under certain operational conditions, operation of damagedequipment may result in degraded process performance leading to personal injuryor death. It is important that the user fully complies with all warning andcautionary notices.1MRK 505 393-UEN B Section 1IntroductionLine differential protection RED650 2.2 IEC 21Application manual
