CHAPTER 1: INTRODUCTION CAUTIONS AND WARNINGS889 GENERATOR PROTECTION SYSTEM – INSTRUCTION MANUAL 1–35Ensure that all ground paths are un-compromised for safety purposes during deviceoperation and service.All recommended equipment that should be grounded and must have a reliable andun-compromised grounding path for safety purposes, protection againstelectromagnetic interference and proper device operation.Equipment grounds should be bonded together and connected to the facility’s mainground system for primary power.Keep all ground leads as short as possible.In addition to the safety precautions mentioned all electrical connections made mustrespect the applicable local jurisdiction electrical code.It is recommended that a field external switch, circuit breaker be connected near theequipment as a means of power disconnect. The external switch or circuit breaker isselected in accordance with the power rating.This product itself is not Personal Protective Equipment (PPE). However, it can be usedin the computation of site specific Arc Flash analysis when the arc flash option isordered. If a new appropriate Hazard Reduction Category code for the installation isdetermined, user should follow the cautions mentioned in the arc flash installationsection.follow the cautions mentioned in the arc flash installation section.If a new appropriate HarThe critical fail relay must be connected to annunciate the status of the device whenthe Arc Flash option is ordered.Ensure that the control power applied to the device, the AC current, and voltage inputmatch the ratings specified on the relay nameplate. Do not apply current or voltage inexcess of the specified limits.Only qualified personnel are to operate the device. Such personnel must be thoroughlyfamiliar with all safety cautions and warnings in this manual and with applicablecountry, regional, utility, and plant safety regulations.Hazardous voltages can exist in the power supply and at the device connection tocurrent transformers, voltage transformers, control, and test circuit terminals. Makesure all sources of such voltages are isolated prior to attempting work on the device.Hazardous voltages can exist when opening the secondary circuits of live currenttransformers. Make sure that current transformer secondary circuits are shorted outbefore making or removing any connection to the current transformer (CT) inputterminals of the device.For tests with secondary test equipment, ensure that no other sources of voltages orcurrents are connected to such equipment and that trip and close commands to thecircuit breakers or other switching apparatus are isolated, unless this is required bythe 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 switching apparatus, all control circuits from the device to theprimary equipment must be isolated while personnel are working on or around thisprimary equipment to prevent any inadvertent command from this device.Use an external disconnect to isolate the mains voltage supply.
