GE Multilin B90 Low Impedance Bus Differential System 1-11 GETTING STARTED 1.1 IMPORTANT PROCEDURES11 GETTING STARTED 1.1IMPORTANT PROCEDURESPlease read this chapter to help guide you through the initial setup of your new B90 Low Impedance Bus Differential Sys-tem.1.1.1 CAUTIONS AND WARNINGSBefore attempting to install or use the device, review all safety indicators in this document to help prevent injury, equipmentdamage, or downtime.The following safety and equipment symbols are used in this document.Indicates a hazardous situation which, if not avoided, will result in death or serious injury.Indicates a hazardous situation which, if not avoided, could result in death or serious injury.Indicates a hazardous situation which, if not avoided, could result in minor or moderateinjury.Indicates practices not related to personal injury.a) GENERAL CAUTIONS AND WARNINGSThe following general safety precautions and warnings apply.Ensure that all connections to the product are correct so as to avoid accidental risk of shockand/or fire, for example such as can arise from high voltage connected to low voltage termi-nals.Follow the requirements of this manual, including adequate wiring size and type, terminal torque settings, voltage,current magnitudes applied, and adequate isolation/clearance in external wiring from high to low voltage circuits.Use the device only for its intended purpose and application.Ensure that all ground paths are uncompromised for safety purposes during device operation and service.Ensure that the control power applied to the device, the AC current, and voltage input match the ratings specifiedon the relay nameplate. Do not apply current or voltage in excess of the specified limits.Only qualified personnel are to operate the device. Such personnel must be thoroughly familiar with all safety cau-tions and warnings in this manual and with applicable country, regional, utility, and plant safety regulations.Hazardous voltages can exist in the power supply and at the device connection to current transformers, voltagetransformers, control, and test circuit terminals. Make sure all sources of such voltages are isolated prior toattempting work on the device.Hazardous voltages can exist when opening the secondary circuits of live current transformers. Make sure thatcurrent transformer secondary circuits are shorted out before making or removing any connection to the currenttransformer (CT) input terminals of the device.For tests with secondary test equipment, ensure that no other sources of voltages or currents are connected tosuch equipment and that trip and close commands to the circuit breakers or other switching apparatus are iso-lated, unless this is required by the test procedure and is specified by appropriate utility/plant procedure.When the device is used to control primary equipment, such as circuit breakers, isolators, and other switchingapparatus, all control circuits from the device to the primary equipment must be isolated while personnel areworking on or around this primary equipment to prevent any inadvertent command from this device.Use an external disconnect to isolate the mains voltage supply.LED transmitters are classified as IEC 60825-1 Accessible Emission Limit (AEL) Class 1M.Class 1M devices are considered safe to the unaided eye. Do not view directly with opticalinstruments.This product is rated to Class A emissions levels and is to be used in Utility, Substation Industrialenvironments. Not to be used near electronic devices rated for Class B levels.DANGERWARNINGCAUTIONNOTICEDANGERCAUTION
