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7/29/2019 Line Reactors
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Line Reactors 1MTE CORPORATION
Line Reac t ors
4 Purpose
4 Harm onics Reduct ion4 Rat ings Considerat ions
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Line Reactors 2MTE CORPORATION
Line Reac t ors Inc rease Dr ive
Rel iab i l i tyl Minimize cat ast rophic dr ive fa i lu res
due t o t rans ient over-vo l t ages
l Minimize nu isanc e over-vo l t age t r ipsdue to l ine t ransient s :
U t i l it y p ow e r f ac t o r c or re c t i on
Sw i t c h ing l ar ge AC mo t o r loads
Sw i t c h ing la rge t r ans fo rme r s
H igh AC l ine c ondi t i ons
7/29/2019 Line Reactors
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Line Reactors 3MTE CORPORATION
Line Reac t ors Inc rease Dr ive
Rel iab i l i t y (c ont )l Minim ize l ine-s ide fuse oper at ion
dur ing unsym m et r ica l vo l tage sags:
U t i l i t y sys tem l ine -t o -g round fau lt s
U nbalanc ed phase c u rr en t s
l Reduc e harm onic s
l
Improve e f fec t i ve pow er fac t o r
7/29/2019 Line Reactors
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Line Reactors 4MTE CORPORATION
Drive/L ine Reac t or Ec onom ic s
(480 VAC User Pr ic es)10 HP AC Inver t er $ 1838
10 HP Mot or $ 552
Circ ui t Break er $ 362Safet y Sw i t c h $ 105
Operat or Cont ro l St at ion $ 307
Input Reac t orNEMA I $ 218
Inst a l la t ion $ 1500
Tot al $ 4882
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Line Reactors 5MTE CORPORATION
Cost o f Cat ast roph ic
Fai lure
10 HP Inver t er $ 1838Labor $ 200
Tot al $ 2038
+Down Time
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Line Reactors 6MTE CORPORATION
Cost o f Nu isanc e Tr ips
Labor $ 50
+
Dow n T ime
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Line Reactors 7MTE CORPORATION
How Muc h Reac t or Do I
Need?
3% reac t o r el im ina tes 95%
of nuisance t r ips
5% reac t o r el im ina tes 99+%
of nuisance t r ips
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Line Reactors 8MTE CORPORATION
Reac t ors Reduc e
Harm onic Dis t or t ion
0.50% 1% 1.5% 2% 2.5% 3% 5%
5th 0.8 0.6 0.5 0.46 0.42 0.4 0.32
7th 0.6 0.37 0.3 0.22 0.2 0.16 0.1211th 0.18 0.12 0.1 0.09 0.08 0.073 0.058
13th 0.1 0.075 0.06 0.058 0.05 0.049 0.039
17th 0.073 0.052 0.04 0.036 0.032 0.03 0.022
19th 0.06 0.042 0.03 0.028 0.025 0.022 0.008
% THD - I 102.5 72.2 59.6 52.3 47.6 44.13 34.96
Amps
Increase43% 23% 17% 13% 11% 9% 6%
INPUT IMPEDANCEHarmonicNumber
Input harmonic current distortion depends on total input
line impedance. (Data is for 6-pulse diode bridge).
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Line Reactors 9MTE CORPORATION
Line Reac t or Rat ings
l Max imum vo lt age ra t ing
l Therm al c ur rent ra t ing IRMS
Must be > VFD Input Current Rat ingl Fundam ent a l c ur rent ra t ing IFUNDl Percent im pedanc e =
7/29/2019 Line Reactors
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Line Reactors 10MTE CORPORATION
Line Reac t or Rat ings
l Max imum am bient t emperat u re
l Max imum a l t i tude w i thou t dera t ingl Tempera ture r i se
l Max imum sw i tc h ing f requency
l dv/dt rat ing
l Die lec t r i c s t rength
l Agenc y approvals
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Line Reactors 11MTE CORPORATION
MTE Line Reac t ors
l Harm onic Com pensated
l
Im pedance based on Fundament a lamps
l TRMS Am p rat ing suf f ic ient for VFDinput c ur ren t
l >16,000 vol t /usec dv/dt rat ingl CE, UL, cUL, CSA (1-1200 am ps)
7/29/2019 Line Reactors
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Line Reactors 12MTE CORPORATION
MTE Gives You...
The low est c ost
The low es t ins ta l led c os tThe ful l m easure o f impedance
The most durab le produc t
Del ivery f rom s t oc kA g lobal de l ivery syst em
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Line Reactors 13MTE CORPORATION
Input Reac t or Spec
Each variable frequency drive must be equipped with an input reactor offering noless than 4.5% effective impedance at rated motor amps (the fundamental
current). 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. 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 all
reactors rated from 2 amps thru 400 amps.Higher current reactors may besupplied with copper tab type terminals. Reactor must be MTE Corporation typeRL series.
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Line Reactors 14MTE CORPORATION
Pow er Fac t or Cor rec t ion Capac i t o r De-Tuning Reac t or Spec i f ic at ion
Each Power Factor Correction Capacitor Bank must be equipped with a seriesconnected de-tuning reactor to prevent importation of harmonics. They must be
UL-506 and UL-508 approved. Nema 1 enclosed units must be UL Listed. 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 an
ambient temperature of 40 C and a have a maximum temperature rise of 100C.When applied in an ambient of 25C their temperature rise must be only 80C.Their watts loss must be less than 1% of the capacitor KVAR rating. 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 Cor oration t e RL series.
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Line Reactors 15MTE CORPORATION