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<br />CoalMineElectricalExamInteractiveResource/.DS_Store <br />CoalMineElectricalExamInteractiveResource/AUTORUN.INF[autorun] <br />open = Task.exe <br /> <br /> <br />CoalMineElectricalExamInteractiveResource/Calculator/.DS_Store <br />CoalMineElectricalExamInteractiveResource/Calculator/Calculator.fla <br />CoalMineElectricalExamInteractiveResource/Calculator/Calculator.swf <br />CoalMineElectricalExamInteractiveResource/Desktop DB <br />CoalMineElectricalExamInteractiveResource/Desktop DF <br />CoalMineElectricalExamInteractiveResource/MAC_PLAY <br />CoalMineElectricalExamInteractiveResource/Media/.DS_Store <br />CoalMineElectricalExamInteractiveResource/Media/75_901(b).pdfDocument4 <br /> <br />30 CFR § 75.901 Protection of low-and medium-voltage threephase circuits used underground. (b) Diesel-powered electrical generators used as an alternative to power centers for the purpose <br /> of moving equipment in, out, and around the mine, and to perform work in areas where permissible equipment is not required, must comply with the following: (1) The diesel engine powering <br /> the electrical generator must be approved under 30 CFR part 7, subpart E. (2) A grounding resistor rated for the phase-to-phase voltage of the system must be provided to limit the ground-fault <br /> current to not more than 0.5 amperes. The grounding resistor(s) must be located: (i) Between the wyeconnected generator neutral and the generator frame; (see Figure I in Appendix A <br /> to subpart J of this part) or (ii) Between the wye-connected generator neutral and the generator frame and between the wye-connected transformer secondary and the transformer frame <br /> when an isolation transformer(s) is used and the generator is supplying power to the other equipment; (see Figure II in Appendix A to subpart J of this part) or (iii) Between the wye-connected <br /> generator neutral and the generator frame when an auto-transformer is used. (see Figure III in Appendix A to subpart J of this part) (3) Each threephase output circuit of the generator <br /> must be equipped with a sensitive ground fault relay. The protective relay must be set to cause the circuit interrupting device that supplies power to the primary windings of each transformer <br /> to trip and shut down the diesel engine when a phase-to-frame fault of not more than 90 milliamperes occurs. (4) Each three-phase output circuit that supplies power to equipment must <br /> be equipped with an instantaneous sensitive ground-fault relay that will <br />cause its respective circuit interrupting device(s) to trip and cause shutdown of the diesel engine when a phaseto-frame fault occurs. The grounded-phase protection must be set at not <br /> more than 90 milliamps. Current transformers used for the ground-fault protection must be single window-type and must be installed to encircle all three phase conductors. Equipment <br /> safety grounding conductors must not pass through or be connected in series with ground-fault current transformers. (5) Each three-phase circuit interrupting device must be provided <br /> with a means to provide short-circuit, overcurrent, grounded-phase, undervoltage, and ground wire monitoring protection. The instantaneous only trip unit for the circuit interrupting <br /> device(s) in use must be adjusted to trip at not more than 75 percent of the minimum available short circuit current at the point where the portable cable enters the equipment or the <br /> maximum allowable instantaneous settings specified in § 75.601-1, whichever is less. (6) The equipment portable cable length(s) must not exceed the length(s) specified in 30 CFR part <br /> 18, appendix I, table 9, Specifications for Cables Longer than 500 Feet. (7) Permanent label(s) listing the maximum circuit interrupting device setting(s) and maximum portable cable <br /> length(s) must be installed on each instantaneous trip unit or be maintained near each three-phase circuit interrupting device. The permanent label(s) must be maintained legibly. (8) <br /> The circuit interrupting device that supplies three-phase power circuit(s) to the equipment being powered must be limited to the use of only one circuit interrupting device at a time <br /> when equipment is being moved in, out, and around the mine. (9) The grounding system must include an MSHAaccepted ground wire monitor system that satisfies the requirements of § 75.902; <br /> or have a No. 1/0 or larger <br />external grounding conductor to bond and ground the frames of all equipment to the frame of the generator. (10) All trailing cables extending from the generator to equipment must comply <br /> with § 75.907. (11) A strain relief device must be provided on each end of the trailing cables that extends between the generator and the piece of equipment being powered. (12) Prior <br /> to moving each piece of equipment or performing work, a functional test of each ground fault and ground wire monitor system must be performed by a qualified electrician who meets the <br /> requirements of § 75.153. The ground-fault circuit must be tested without subjecting the circuit to an actual grounded phase condition. A record of each test must be maintained and <br /> made available to authorized representatives of the Secretary and to the miners in such mine. <br />CoalMineElectricalExamInteractiveResource/Media/AcrobatCast.cxt <br />CoalMineElectricalExamInteractiveResource/Media/AcrobatCheck.dxr <br />CoalMineElectricalExamInteractiveResource/Media/Audio/.DS_Store <br />CoalMineElectricalExamInteractiveResource/Media/Audio/Check.mov <br />CoalMineElectricalExamInteractiveResource/Media/Audio/Complete.mov <br />CoalMineElectricalExamInteractiveResource/Media/Audio/IntroAudio/.DS_Store <br />CoalMineElectricalExamInteractiveResource/Media/Audio/IntroAudio/ACStart.mov <br />CoalMineElectricalExamInteractiveResource/Media/Audio/IntroAudio/ACTeoryTest.mov <br />CoalMineElectricalExamInteractiveResource/Media/Audio/IntroAudio/DCStart.mov <br />CoalMineElectricalExamInteractiveResource/Media/Audio/IntroAudio/EquipStart.mov <br />CoalMineElectricalExamInteractiveResource/Media/Audio/IntroAudio/Final.mov <br />CoalMineElectricalExamInteractiveResource/Media/Audio/IntroAudio/Form1.mov <br />CoalMineElectricalExamInteractiveResource/Media/Audio/IntroAudio/Form2.mov <br />CoalMineElectricalExamInteractiveResource/Media/Audio/IntroAudio/Intro.mov <br />CoalMineElectricalExamInteractiveResource/Media/Audio/IntroAudio/Intro2.mov <br />CoalMineElectricalExamInteractiveResource/Media/Audio/IntroAudio/Intro3.mov <br />CoalMineElectricalExamInteractiveResource/Media/Audio/IntroAudio/Intro4.mov <br />CoalMineElectricalExamInteractiveResource/Media/Audio/IntroAudio/IntroACDC.mov <br />CoalMineElectricalExamInteractiveResource/Media/Audio/IntroAudio/IntroACDC_v2.mov <br />CoalMineElectricalExamInteractiveResource/Media/Audio/IntroAudio/IntroEquipment.mov <br />CoalMineElectricalExamInteractiveResource/Media/Audio/IntroAudio/IntroNEC.mov <br />CoalMineElectricalExamInteractiveResource/Media/Audio/IntroAudio/IntroPart18.mov <br />CoalMineElectricalExamInteractiveResource/Media/Audio/IntroAudio/IntroPart75.mov <br />CoalMineElectricalExamInteractiveResource/Media/Audio/IntroAudio/IntroPart77.mov <br />CoalMineElectricalExamInteractiveResource/Media/Audio/IntroAudio/IntrotoFormulas.mov <br />CoalMineElectricalExamInteractiveResource/Media/Audio/IntroAudio/Menubegin.mov <br />CoalMineElectricalExamInteractiveResource/Media/Audio/IntroAudio/NECStart.mov <br />CoalMineElectricalExamInteractiveResource/Media/Audio/MiscRedos_111408/.DS_Store <br />CoalMineElectricalExamInteractiveResource/Media/Audio/MiscRedos_111408/Adobe.mov <br />CoalMineElectricalExamInteractiveResource/Media/Audio/MiscRedos_111408/Fatals1.mov <br />CoalMineElectricalExamInteractiveResource/Media/Audio/MiscRedos_111408/Fatals2.mov <br />CoalMineElectricalExamInteractiveResource/Media/Audio/MiscRedos_111408/Refmats.mov <br />CoalMineElectricalExamInteractiveResource/Media/Audio/MR4.mov <br />CoalMineElectricalExamInteractiveResource/Media/Audio/NEC pt3/6_40S.mov <br />CoalMineElectricalExamInteractiveResource/Media/Audio/NEC pt3/6_41S.mov <br />CoalMineElectricalExamInteractiveResource/Media/Audio/NEC pt3/6_42bS.mov <br />CoalMineElectricalExamInteractiveResource/Media/Audio/NEC pt3/6_42cS.mov <br />CoalMineElectricalExamInteractiveResource/Media/Audio/NEC pt3/6_42S.mov <br />CoalMineElectricalExamInteractiveResource/Media/Audio/NEC pt3/6_43S.mov <br />CoalMineElectricalExamInteractiveResource/Media/Audio/NEC pt3/6_44S.mov <br />CoalMineElectricalExamInteractiveResource/Media/Audio/NEC pt3/6_45S.mov <br />CoalMineElectricalExamInteractiveResource/Media/Audio/NEC pt3/6_46S.mov <br />CoalMineElectricalExamInteractiveResource/Media/Audio/NEC pt3/6_47S.mov <br />CoalMineElectricalExamInteractiveResource/Media/Audio/NEC pt3/6_48aS.mov <br />CoalMineElectricalExamInteractiveResource/Media/Audio/NEC pt3/6_48S.mov <br />CoalMineElectricalExamInteractiveResource/Media/Audio/NEC pt3/6_49S.mov <br />CoalMineElectricalExamInteractiveResource/Media/Audio/NEC pt3/6_50S.mov <br />CoalMineElectricalExamInteractiveResource/Media/Audio/NEC pt3/6_51S.mov <br />CoalMineElectricalExamInteractiveResource/Media/Audio/NEC pt3/6_52S.mov <br />CoalMineElectricalExamInteractiveResource/Media/Audio/NEC pt3/6_53S.mov <br />CoalMineElectricalExamInteractiveResource/Media/Audio/NEC pt3/CheckAnswer.mov <br />CoalMineElectricalExamInteractiveResource/Media/Audio/NEC_pt2/6_20S.mov <br />CoalMineElectricalExamInteractiveResource/Media/Audio/NEC_pt2/6_21S.mov <br />CoalMineElectricalExamInteractiveResource/Media/Audio/NEC_pt2/6_22S.mov <br />CoalMineElectricalExamInteractiveResource/Media/Audio/NEC_pt2/6_23S.mov <br />CoalMineElectricalExamInteractiveResource/Media/Audio/NEC_pt2/6_24S.mov <br />CoalMineElectricalExamInteractiveResource/Media/Audio/NEC_pt2/6_25S.mov <br />CoalMineElectricalExamInteractiveResource/Media/Audio/NEC_pt2/6_26S.mov <br />CoalMineElectricalExamInteractiveResource/Media/Audio/NEC_pt2/6_27S.mov <br />CoalMineElectricalExamInteractiveResource/Media/Audio/NEC_pt2/6_28S.mov <br />CoalMineElectricalExamInteractiveResource/Media/Audio/NEC_pt2/6_29S.mov <br />CoalMineElectricalExamInteractiveResource/Media/Audio/NEC_pt2/6_30S.mov <br />CoalMineElectricalExamInteractiveResource/Media/Audio/NEC_pt2/6_31S.mov <br />CoalMineElectricalExamInteractiveResource/Media/Audio/NEC_pt2/6_32S.mov <br />CoalMineElectricalExamInteractiveResource/Media/Audio/NEC_pt2/6_33S.mov <br />CoalMineElectricalExamInteractiveResource/Media/Audio/NEC_pt2/6_34S.mov <br />CoalMineElectricalExamInteractiveResource/Media/Audio/NEC_pt2/6_36S.mov <br />CoalMineElectricalExamInteractiveResource/Media/Audio/NEC_pt2/6_37S.mov <br />CoalMineElectricalExamInteractiveResource/Media/Audio/NEC_pt2/6_38S.mov <br />CoalMineElectricalExamInteractiveResource/Media/Audio/NEC_pt2/6_39S.mov <br />CoalMineElectricalExamInteractiveResource/Media/Audio/NECpt1/6_10S.mov <br />CoalMineElectricalExamInteractiveResource/Media/Audio/NECpt1/6_11S.mov <br />CoalMineElectricalExamInteractiveResource/Media/Audio/NECpt1/6_12S.mov <br />CoalMineElectricalExamInteractiveResource/Media/Audio/NECpt1/6_13S.mov <br />CoalMineElectricalExamInteractiveResource/Media/Audio/NECpt1/6_14S.mov <br />CoalMineElectricalExamInteractiveResource/Media/Audio/NECpt1/6_15S.mov <br />CoalMineElectricalExamInteractiveResource/Media/Audio/NECpt1/6_16S.mov <br />CoalMineElectricalExamInteractiveResource/Media/Audio/NECpt1/6_17S.mov <br />CoalMineElectricalExamInteractiveResource/Media/Audio/NECpt1/6_18S.mov <br />CoalMineElectricalExamInteractiveResource/Media/Audio/NECpt1/6_19S.mov <br />CoalMineElectricalExamInteractiveResource/Media/Audio/NECpt1/6_1S.mov <br />CoalMineElectricalExamInteractiveResource/Media/Audio/NECpt1/6_2S.mov <br />CoalMineElectricalExamInteractiveResource/Media/Audio/NECpt1/6_3S.mov <br />CoalMineElectricalExamInteractiveResource/Media/Audio/NECpt1/6_4S.mov <br />CoalMineElectricalExamInteractiveResource/Media/Audio/NECpt1/6_5S.mov <br />CoalMineElectricalExamInteractiveResource/Media/Audio/NECpt1/6_6S.mov <br />CoalMineElectricalExamInteractiveResource/Media/Audio/NECpt1/6_7S.mov <br />CoalMineElectricalExamInteractiveResource/Media/Audio/NECpt1/6_8S.mov <br />CoalMineElectricalExamInteractiveResource/Media/Audio/NECpt1/6_9S.mov <br />CoalMineElectricalExamInteractiveResource/Media/Audio/NECpt1/Elec6_10.mov <br />CoalMineElectricalExamInteractiveResource/Media/Audio/Part_18audio_scratch/2_10S.mov <br />CoalMineElectricalExamInteractiveResource/Media/Audio/Part_18audio_scratch/2_11S.mov <br />CoalMineElectricalExamInteractiveResource/Media/Audio/Part_18audio_scratch/2_12S.mov <br />CoalMineElectricalExamInteractiveResource/Media/Audio/Part_18audio_scratch/2_13S.mov <br />CoalMineElectricalExamInteractiveResource/Media/Audio/Part_18audio_scratch/2_14bS.mov <br />CoalMineElectricalExamInteractiveResource/Media/Audio/Part_18audio_scratch/2_14S.mov <br />CoalMineElectricalExamInteractiveResource/Media/Audio/Part_18audio_scratch/2_15S.mov <br />CoalMineElectricalExamInteractiveResource/Media/Audio/Part_18audio_scratch/2_16S.mov <br />CoalMineElectricalExamInteractiveResource/Media/Audio/Part_18audio_scratch/2_17S.mov <br />CoalMineElectricalExamInteractiveResource/Media/Audio/Part_18audio_scratch/2_18bS.mov <br />CoalMineElectricalExamInteractiveResource/Media/Audio/Part_18audio_scratch/2_18S.mov <br />CoalMineElectricalExamInteractiveResource/Media/Audio/Part_18audio_scratch/2_19bS.mov <br />CoalMineElectricalExamInteractiveResource/Media/Audio/Part_18audio_scratch/2_19S.mov <br />CoalMineElectricalExamInteractiveResource/Media/Audio/Part_18audio_scratch/2_1S.mov <br />CoalMineElectricalExamInteractiveResource/Media/Audio/Part_18audio_scratch/2_20bS.mov <br />CoalMineElectricalExamInteractiveResource/Media/Audio/Part_18audio_scratch/2_20S.mov <br />CoalMineElectricalExamInteractiveResource/Media/Audio/Part_18audio_scratch/2_21bS.mov <br />CoalMineElectricalExamInteractiveResource/Media/Audio/Part_18audio_scratch/2_21S.mov <br />CoalMineElectricalExamInteractiveResource/Media/Audio/Part_18audio_scratch/2_22S.mov <br />CoalMineElectricalExamInteractiveResource/Media/Audio/Part_18audio_scratch/2_23S.mov <br />CoalMineElectricalExamInteractiveResource/Media/Audio/Part_18audio_scratch/2_24S.mov <br />CoalMineElectricalExamInteractiveResource/Media/Audio/Part_18audio_scratch/2_25S.mov <br />CoalMineElectricalExamInteractiveResource/Media/Audio/Part_18audio_scratch/2_26S.mov <br />CoalMineElectricalExamInteractiveResource/Media/Audio/Part_18audio_scratch/2_27S.mov <br />CoalMineElectricalExamInteractiveResource/Media/Audio/Part_18audio_scratch/2_28S.mov <br />CoalMineElectricalExamInteractiveResource/Media/Audio/Part_18audio_scratch/2_29S.mov <br />CoalMineElectricalExamInteractiveResource/Media/Audio/Part_18audio_scratch/2_2S.mov <br />CoalMineElectricalExamInteractiveResource/Media/Audio/Part_18audio_scratch/2_30bS.mov <br />CoalMineElectricalExamInteractiveResource/Media/Audio/Part_18audio_scratch/2_30S.mov <br />CoalMineElectricalExamInteractiveResource/Media/Audio/Part_18audio_scratch/2_31S.mov <br />CoalMineElectricalExamInteractiveResource/Media/Audio/Part_18audio_scratch/2_32S.mov <br />CoalMineElectricalExamInteractiveResource/Media/Audio/Part_18audio_scratch/2_33S.mov <br />CoalMineElectricalExamInteractiveResource/Media/Audio/Part_18audio_scratch/2_34S.mov <br />CoalMineElectricalExamInteractiveResource/Media/Audio/Part_18audio_scratch/2_35S.mov <br />CoalMineElectricalExamInteractiveResource/Media/Audio/Part_18audio_scratch/2_3S.mov <br />CoalMineElectricalExamInteractiveResource/Media/Audio/Part_18audio_scratch/2_4bS.mov <br />CoalMineElectricalExamInteractiveResource/Media/Audio/Part_18audio_scratch/2_4S copy.mov <br />CoalMineElectricalExamInteractiveResource/Media/Audio/Part_18audio_scratch/2_4S.mov <br />CoalMineElectricalExamInteractiveResource/Media/Audio/Part_18audio_scratch/2_5S.mov <br />CoalMineElectricalExamInteractiveResource/Media/Audio/Part_18audio_scratch/2_6S.mov <br />CoalMineElectricalExamInteractiveResource/Media/Audio/Part_18audio_scratch/2_7S.mov <br />CoalMineElectricalExamInteractiveResource/Media/Audio/Part_18audio_scratch/2_8S.mov <br />CoalMineElectricalExamInteractiveResource/Media/Audio/Part_18audio_scratch/2_9S.mov <br />CoalMineElectricalExamInteractiveResource/Media/Audio/Part18redos/2_17.mov <br />CoalMineElectricalExamInteractiveResource/Media/Audio/Part18redos/2_23Part18.mov <br />CoalMineElectricalExamInteractiveResource/Media/Audio/Part18redos/2_8.mov <br />CoalMineElectricalExamInteractiveResource/Media/Audio/Part18redos/2_end.mov <br />CoalMineElectricalExamInteractiveResource/Media/Audio/Part75_pt1/3_10bS.mov <br />CoalMineElectricalExamInteractiveResource/Media/Audio/Part75_pt1/3_10S.mov <br />CoalMineElectricalExamInteractiveResource/Media/Audio/Part75_pt1/3_11S.mov <br />CoalMineElectricalExamInteractiveResource/Media/Audio/Part75_pt1/3_12S.mov <br />CoalMineElectricalExamInteractiveResource/Media/Audio/Part75_pt1/3_13S.mov <br />CoalMineElectricalExamInteractiveResource/Media/Audio/Part75_pt1/3_14S.mov <br />CoalMineElectricalExamInteractiveResource/Media/Audio/Part75_pt1/3_15S.mov <br />CoalMineElectricalExamInteractiveResource/Media/Audio/Part75_pt1/3_16bS.mov <br />CoalMineElectricalExamInteractiveResource/Media/Audio/Part75_pt1/3_16S.mov <br />CoalMineElectricalExamInteractiveResource/Media/Audio/Part75_pt1/3_17S.mov <br />CoalMineElectricalExamInteractiveResource/Media/Audio/Part75_pt1/3_18S.mov <br />CoalMineElectricalExamInteractiveResource/Media/Audio/Part75_pt1/3_19.mov <br />CoalMineElectricalExamInteractiveResource/Media/Audio/Part75_pt1/3_1S.mov <br />CoalMineElectricalExamInteractiveResource/Media/Audio/Part75_pt1/3_20bS.mov <br />CoalMineElectricalExamInteractiveResource/Media/Audio/Part75_pt1/3_20S.mov <br />CoalMineElectricalExamInteractiveResource/Media/Audio/Part75_pt1/3_2S.mov <br />CoalMineElectricalExamInteractiveResource/Media/Audio/Part75_pt1/3_3S.mov <br />CoalMineElectricalExamInteractiveResource/Media/Audio/Part75_pt1/3_4b.mov <br />CoalMineElectricalExamInteractiveResource/Media/Audio/Part75_pt1/3_4S.mov <br />CoalMineElectricalExamInteractiveResource/Media/Audio/Part75_pt1/3_5S.mov <br />CoalMineElectricalExamInteractiveResource/Media/Audio/Part75_pt1/3_6S.mov <br />CoalMineElectricalExamInteractiveResource/Media/Audio/Part75_pt1/3_7bS.mov <br />CoalMineElectricalExamInteractiveResource/Media/Audio/Part75_pt1/3_7S.mov <br />CoalMineElectricalExamInteractiveResource/Media/Audio/Part75_pt1/3_8S.mov <br />CoalMineElectricalExamInteractiveResource/Media/Audio/Part75_pt1/3_9S.mov <br />CoalMineElectricalExamInteractiveResource/Media/Audio/Part75_pt1/Menu.mov <br />CoalMineElectricalExamInteractiveResource/Media/Audio/Part75_pt2/3_21S.mov <br />CoalMineElectricalExamInteractiveResource/Media/Audio/Part75_pt2/3_22S.mov <br />CoalMineElectricalExamInteractiveResource/Media/Audio/Part75_pt2/3_23bS.mov <br />CoalMineElectricalExamInteractiveResource/Media/Audio/Part75_pt2/3_23S.mov <br />CoalMineElectricalExamInteractiveResource/Media/Audio/Part75_pt2/3_24bS.mov <br />CoalMineElectricalExamInteractiveResource/Media/Audio/Part75_pt2/3_24S.mov <br />CoalMineElectricalExamInteractiveResource/Media/Audio/Part75_pt2/3_25S.mov <br />CoalMineElectricalExamInteractiveResource/Media/Audio/Part75_pt2/3_26S.mov <br />CoalMineElectricalExamInteractiveResource/Media/Audio/Part75_pt2/3_27S.mov <br />CoalMineElectricalExamInteractiveResource/Media/Audio/Part75_pt2/3_28S.mov <br />CoalMineElectricalExamInteractiveResource/Media/Audio/Part75_pt2/3_29S.mov <br />CoalMineElectricalExamInteractiveResource/Media/Audio/Part75_pt2/3_30S.mov <br />CoalMineElectricalExamInteractiveResource/Media/Audio/Part75_pt2/3_31S.mov <br />CoalMineElectricalExamInteractiveResource/Media/Audio/Part75_pt2/3_32S.mov <br />CoalMineElectricalExamInteractiveResource/Media/Audio/Part75_pt2/3_33S.mov <br />CoalMineElectricalExamInteractiveResource/Media/Audio/Part75_pt2/3_34S.mov <br />CoalMineElectricalExamInteractiveResource/Media/Audio/Part75_pt2/3_35S.mov <br />CoalMineElectricalExamInteractiveResource/Media/Audio/Part75_pt2/3_36S.mov <br />CoalMineElectricalExamInteractiveResource/Media/Audio/Part75_pt2/3_37.mov <br />CoalMineElectricalExamInteractiveResource/Media/Audio/Part75_pt2/3_37bS.mov <br />CoalMineElectricalExamInteractiveResource/Media/Audio/Part75_pt2/3_37cS.mov <br />CoalMineElectricalExamInteractiveResource/Media/Audio/Part75_pt2/3_37dS.mov <br />CoalMineElectricalExamInteractiveResource/Media/Audio/Part75_pt2/3_38.mov <br />CoalMineElectricalExamInteractiveResource/Media/Audio/Part75_pt2/3_39b.mov <br />CoalMineElectricalExamInteractiveResource/Media/Audio/Part75_pt2/3_39S.mov <br />CoalMineElectricalExamInteractiveResource/Media/Audio/Part75_pt2/3_40S.mov <br />CoalMineElectricalExamInteractiveResource/Media/Audio/Part75_pt2/3_41S.mov <br />CoalMineElectricalExamInteractiveResource/Media/Audio/Part75_pt2/3_43S.mov <br />CoalMineElectricalExamInteractiveResource/Media/Audio/Part75_pt2/3_44S.mov <br />CoalMineElectricalExamInteractiveResource/Media/Audio/Part77audioV2/4_1.mov <br />CoalMineElectricalExamInteractiveResource/Media/Audio/Part77audioV2/4_10.mov <br />CoalMineElectricalExamInteractiveResource/Media/Audio/Part77audioV2/4_11.mov <br />CoalMineElectricalExamInteractiveResource/Media/Audio/Part77audioV2/4_12.mov <br />CoalMineElectricalExamInteractiveResource/Media/Audio/Part77audioV2/4_13.mov <br />CoalMineElectricalExamInteractiveResource/Media/Audio/Part77audioV2/4_14.mov <br />CoalMineElectricalExamInteractiveResource/Media/Audio/Part77audioV2/4_15.mov <br />CoalMineElectricalExamInteractiveResource/Media/Audio/Part77audioV2/4_16.mov <br />CoalMineElectricalExamInteractiveResource/Media/Audio/Part77audioV2/4_16b.mov <br />CoalMineElectricalExamInteractiveResource/Media/Audio/Part77audioV2/4_17.mov <br />CoalMineElectricalExamInteractiveResource/Media/Audio/Part77audioV2/4_18.mov <br />CoalMineElectricalExamInteractiveResource/Media/Audio/Part77audioV2/4_19.mov <br />CoalMineElectricalExamInteractiveResource/Media/Audio/Part77audioV2/4_19b.mov <br />CoalMineElectricalExamInteractiveResource/Media/Audio/Part77audioV2/4_19c.mov <br />CoalMineElectricalExamInteractiveResource/Media/Audio/Part77audioV2/4_2.mov <br />CoalMineElectricalExamInteractiveResource/Media/Audio/Part77audioV2/4_20.mov <br />CoalMineElectricalExamInteractiveResource/Media/Audio/Part77audioV2/4_21.mov <br />CoalMineElectricalExamInteractiveResource/Media/Audio/Part77audioV2/4_22.mov <br />CoalMineElectricalExamInteractiveResource/Media/Audio/Part77audioV2/4_23.mov <br />CoalMineElectricalExamInteractiveResource/Media/Audio/Part77audioV2/4_24.mov <br />CoalMineElectricalExamInteractiveResource/Media/Audio/Part77audioV2/4_25.mov <br />CoalMineElectricalExamInteractiveResource/Media/Audio/Part77audioV2/4_26.mov <br />CoalMineElectricalExamInteractiveResource/Media/Audio/Part77audioV2/4_27.mov <br />CoalMineElectricalExamInteractiveResource/Media/Audio/Part77audioV2/4_28.mov <br />CoalMineElectricalExamInteractiveResource/Media/Audio/Part77audioV2/4_28b.mov <br />CoalMineElectricalExamInteractiveResource/Media/Audio/Part77audioV2/4_29.mov <br />CoalMineElectricalExamInteractiveResource/Media/Audio/Part77audioV2/4_3.mov <br />CoalMineElectricalExamInteractiveResource/Media/Audio/Part77audioV2/4_30.mov <br />CoalMineElectricalExamInteractiveResource/Media/Audio/Part77audioV2/4_31.mov <br />CoalMineElectricalExamInteractiveResource/Media/Audio/Part77audioV2/4_32.mov <br />CoalMineElectricalExamInteractiveResource/Media/Audio/Part77audioV2/4_33.mov <br />CoalMineElectricalExamInteractiveResource/Media/Audio/Part77audioV2/4_34.mov <br />CoalMineElectricalExamInteractiveResource/Media/Audio/Part77audioV2/4_35.mov <br />CoalMineElectricalExamInteractiveResource/Media/Audio/Part77audioV2/4_36.mov <br />CoalMineElectricalExamInteractiveResource/Media/Audio/Part77audioV2/4_37v2.mov <br />CoalMineElectricalExamInteractiveResource/Media/Audio/Part77audioV2/4_3b.mov <br />CoalMineElectricalExamInteractiveResource/Media/Audio/Part77audioV2/4_4.mov <br />CoalMineElectricalExamInteractiveResource/Media/Audio/Part77audioV2/4_5.mov <br />CoalMineElectricalExamInteractiveResource/Media/Audio/Part77audioV2/4_5b.mov <br />CoalMineElectricalExamInteractiveResource/Media/Audio/Part77audioV2/4_6.mov <br />CoalMineElectricalExamInteractiveResource/Media/Audio/Part77audioV2/4_7.mov <br />CoalMineElectricalExamInteractiveResource/Media/Audio/Part77audioV2/4_8.mov <br />CoalMineElectricalExamInteractiveResource/Media/Audio/Part77audioV2/4_9.mov <br />CoalMineElectricalExamInteractiveResource/Media/Audio/Part77audioV2/IntroPart77v2.mov <br />CoalMineElectricalExamInteractiveResource/Media/CheckBox.cxt <br />CoalMineElectricalExamInteractiveResource/Media/ElectricalFormulas.pdfElectrical Exam Additional Formulas11-3-08 <br /> <br />Electrical Exam Formulas E = I Z VA = KVA (1000) Ns Np = Es Ep = Is Ip Turns, Voltage, Current, Ratios KVA = 1000FL E I !"! Single Phase Transformer KVA = 1000 !"! I E FL Three Phase <br /> Transformer IFL = 3 (1000) !"! E KVA Three Phase Transformer Full Load Current I = !"! E KVA(1000) Single Phase Transformer Full Load Current 3 = 1.73 Square Root of 3 E !"! = E !-N <br /> 3 Three Phase Wye Connected Transformer E ! -N = 3!"! E Three Phase Wye Connected Transformer Ip = IL Single and Three Phase Wye Connected Transformer Ip = 3L I Three Phase Delta Connected <br /> Transformer R = I -N ! E Resistance of Grounding Resistor Wye Connected Transformer <br />IFL = 3x E x % Eff. x P.F. 746 ! -! HP x IFL = x % Eff. x P.F. E HP x 746 ! -! TRANSFORMERS Wye I Line = I Phase E Line = E Phase x 1.73 E Phase = E Line/1.73 Delta E Line = E Phase <br /> I Line = I Phase x 1.73 I Phase = I Line/1.73 Series Circuits ET = E1 + E2 + E3 etc. IT = I1 = I2 = I3 etc. RT = R1 + R2 + R3 etc. CT = _______1_______ 1/C1 + 1/C2 + 1/C3 etc. Parallel <br /> Circuits ET = E1 = E2 = E3 etc. IT = I1 + I2 + I3 etc. RT = ______1_________ 1/R1 + 1/R2 + 1/R3 etc. CT = C1 + C2 + C3 etc. Ohm’s Law Full Load Current of Three Phase Motor Full Load <br /> Current of Single Phase Motor <br />CoalMineElectricalExamInteractiveResource/Media/FG1.pdfMine Safety and Health Administration (MSHA) - Fatal Alert Bulletin for Coal Mine Accident on March 30, 1995 <br /> <br />U.S. Department of Labor Mine Safety and Health Administration Protecting Miners' Safety and Health Since 1978 www.msha.gov [skip navigational links] Search MSHA Advanced Options | A <br /> to Z | Help Find It! in DOL | Compliance Assistance | En Español COAL MINE FATALITY -On Thursday, March 30, 1995, a miner was electrocuted while loading coal into the main slope car, <br /> utilizing the loading conveyor extending from the No. 1 Breast. Other miners, working in the No. 1 Breast, went to the loading area when they heard the victim shout. One of these miners <br /> also received an electrical shock when he entered the loading area. Investigators determined that two different phase conductors of the mine's Delta power system became grounded at <br /> separate locations. One of the locations was on a water pump motor where the victim was standing. This is the eighth coal mine fatality in 1995. As of March 30 last year, there had <br /> been 11 fatalities. This death is the first classified as ELECTRICAL in 1995. One-line diagram of the electrical system For more information: <br />MSHA's Fatal Accident Investigation Report [FTL95C08] Back to Top www.msha.gov www.dol.gov Frequently Asked Questions | Freedom of Information Act | Customer Survey Accessibility | Privacy <br /> & Security Statement | Disclaimers Mine Safety and Health Administration (MSHA) 1100 Wilson Boulevard, 21st Floor Arlington, VA 22209-3939 Phone: (202) 693-9400 Fax-on-demand: (202) <br /> 693-9401 Technical (web) questions: Webmaster On-line Filing Help: MSHAhelpdesk@dol.gov or call (877) 778-6055 Contact Us <br />CoalMineElectricalExamInteractiveResource/Media/FG10.pdfFatalgram for Coal Mine Accident on July 23, 1998 <br /> <br />U.S. Department of Labor Mine Safety and Health Administration Protecting Miners' Safety and Health Since 1978 www.msha.gov [skip navigational links] Search MSHA Advanced Options | A <br /> to Z | Help Find It! in DOL | Compliance Assistance | En Español COAL MINE FATALITY -On Thursday, July 23, 1998, a small crew was working underground dismantling the collector belt <br /> that conveys coal from the surge bin to the slope conveyor belt. The emergency pull cord circuit for the collector belt was energized from the surface and contained a ground fault which <br /> energized the tailpiece of the collector belt unit. While disassembling the structure of the collector belt, the workers would occasionally receive an electrical shock from the metal <br /> structure. The maintenance foreman, on his way to the mine phone to call and have all power circuits to the area deenergized, traveled alongside the energized structure. Along the way, <br /> he contacted the metal frame and was electrocuted. BEST PRACTICES All electric power circuits must be deenergized prior to performing maintenance or repair work on any equipment. The <br /> frames of electrical equipment, including switches, shall be properly grounded. All electric circuits, including control circuits, shall include overcurrent and overload protection. <br /> This is the 17th fatality reported in calendar year 1998 in the coal mining industry. As of this date in 1997, there were 19 fatalities. This is the first fatality classified as ELECTRICAL <br /> in 1998. For more information: MSHA's Fatal Accident Investigation Report [FTL98C17] Back to Top www.msha.gov www.dol.gov <br />Frequently Asked Questions | Freedom of Information Act | Customer Survey Accessibility | Privacy & Security Statement | Disclaimers Mine Safety and Health Administration (MSHA) 1100 <br /> Wilson Boulevard, 21st Floor Arlington, VA 22209-3939 Phone: (202) 693-9400 Fax-on-demand: (202) 693-9401 Technical (web) questions: Webmaster On-line Filing Help: MSHAhelpdesk@dol.gov <br />