Reactors - MTE Corporation

1 Line Reactors1 MTE Corporation Line Reactors4 Purpose4 Harmonics Reduction4 Ratings ConsiderationsLine Reactors2 MTE CORPORATIONLine Reactors Increase DriveReliabilitylMinimize catastrophic drive failuresdue to transient over-voltageslMinimize nuisance over-voltage tripsdue to line transients: Utility power factor correction Switching large AC motor loads Switching large transformers High AC line conditionsLine Reactors3 MTE CORPORATIONLine Reactors Increase DriveReliability (cont)lMinimize line-side fuse operationduring unsymmetrical voltage sags: Utility system line-to-ground faults Unbalanced phase currentslReduce harmonicslImprove effective power factorLine Reactors4 MTE CORPORATIOND rive/Line Reactor Economics(480 VAC User Prices)10 HP AC Inverter$ 183810 HP Motor$ 552 Circuit Breaker$ 362 Safety Switch$ 105 Operator Control Station$ 307 Input Reactor NEMA I$ 218 Installation$ 1500 Total$ 4882 Line Reactors5 MTE CORPORATIONCost of CatastrophicFailure10 HP Inverter$ 1838 Labor$ 200 Total$ 2038 +Down TimeLine Reactors6 MTE CORPORATIONCost of Nuisance TripsLabor$ 50 +Down TimeLine Reactors7 MTE CORPORATIONHow Much Reactor Do INeed?

2 3% reactor eliminates 95%of nuisance trips5% reactor eliminates 99+%of nuisance tripsLine Reactors8 MTE CORPORATIONR eactors ReduceHarmonic THD - Increase43%23%17%13%11%9%6%INPUT IMPEDANCEH armonic NumberInput harmonic current distortion depends on total inputline impedance. (Data is for 6-pulse diode bridge).Line Reactors9 MTE CORPORATIONLine Reactor RatingslMaximum voltage ratinglThermal current rating IRMS Must be > VFD Input Current RatinglFundamental current rating IFUNDlPercent impedance =Line Reactors10 MTE CORPORATIONLine Reactor RatingslMaximum ambient temperaturelMaximum altitude without deratinglTemperature riselMaximum switching frequencyldv/dt ratinglDielectric strengthlAgency approvalsLine Reactors11 MTE CORPORATIONMTE Line ReactorslHarmonic CompensatedlImpedance based on FundamentalampslTRMS Amp rating sufficient for VFDinput currentl>16,000 volt/usec dv/dt ratinglCE, UL, cUL, CSA (1-1200 amps)

3 Line Reactors12 MTE CORPORATIONMTE Gives The lowest cost The lowest installed cost The full measure of impedance The most durable product Delivery from stock A global delivery systemLine Reactors13 MTE CORPORATIONI nput Reactor SpecEach variable frequency drive must be equipped with an input reactor offering noless than effective impedance at rated motor amps (the fundamentalcurrent). They must be harmonic compensated and be UL-506 and UL-508approved. Nema 1 enclosed units must be UL Listed. The continuous currentrating of the reactor must be equal to or greater than the rms input current ratingof the drive. Reactors must be copper wound with a UL class H (180 C)insulation system.

4 They must be suitable for an ambient temperature of 45 Cand a have a maximum temperature rise of 115 C. Their watts loss must be lessthan 1% of the rated load. Box lug type terminals must be provided on allreactors rated from 2 amps thru 400 amps. Higher current Reactors may besupplied with copper tab type terminals. Reactor must be MTE Corporation type RL Reactors14 MTE CORPORATIONP ower Factor Correction CapacitorDe-Tuning Reactor SpecificationEach Power Factor Correction Capacitor Bank must be equipped with a seriesconnected de-tuning reactor to prevent importation of harmonics. They must beUL-506 and UL-508 approved. Nema 1 enclosed units must be UL Listed.

5 Thereactor must be rated to handle 110% of the capacitor fundamental currentcontinuously to compensate for capacitor tolerance and aging. It must also berated to handle fifth harmonic current of a magnitude equal to 15% of thecapacitor fundamental current rating. The nameplate must indicate the ratedfundamental and harmonic currents and frequencies. Reactors must be copperwound with a UL class H (180 C) insulation system. They must be suitable for anambient temperature of 40 C and a have a maximum temperature rise of applied in an ambient of 25C their temperature rise must be only watts loss must be less than 1% of the capacitor KVAR rating.

6 Box lugtype terminals are acceptable on all Reactors rated up to 50 amps. Reactors ratedhigher than 50 Amps must be supplied with copper tab type terminals. Reactormust be MTE Corporation type RL Reactors15 MTE Corporation