MTE: 3-Phase Reactors: Line/Load Reactors

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Benefits of Using Line/Load Reactors

Guard-AC line/load reactors help keep your equipment running longer by absorbing many of the power line disturbances which otherwise damage or shut down your inverters, variable speed controllers, or other sensitive equipment. They are the modern technology solution to inverter and drive application problems. Guard-AC reactors are harmonic compensated and IGBT protected to assure optimum performance in the presence of harmonics. They are very effective at reducing harmonics produced by inverters and drives, and in most cases will help you to meet IEEE 519. Use our harmonic compensated reactors on either the input or output of an adjustable speed drive/inverter. There is no need to de-rate our "harmonic compensated" reactors for harmonics.

Guard-AC reactors are manufactured to the exacting standards of MIL-1-45208, VDE-0550, are UL recognized and CSA certified. All UL approvals are for USA and Canada.

UL-506 File #E53094 (lamp through 1200 amps)
CSA File #LR29753-13 (1200 amps or less) 9
UL-508 File #El80243 (1 amp through 1200 amps)

All higher current reactors offer UL recognized insulation systems and construction.

Impedance Rating
3% impedance reactors are typically sufficient to absorb power line spikes and motor current surges. They will prevent nuisance tripping of drives or circuit breakers in most applications.

3-Phase Reactors
Line/Load Reactors

Protect Motors from Long Lead Effects
Reduce Output Voltage dv/dt
Virtually Eliminate Nuisance Tripping
Extend Semiconductor Life
Reduce Harmonic Distortion
Reduce Surge Currents
Reduce Motor Temperature
Reduce Motor Audible Noise
Improve True Power Factor
Helps Meet IEEE 519 or IEC 1000-3-4

5% impedance reactors are best for reducing harmonic currents and frequencies. Use them when you must comply with IEEE 519, to reduce motor operating temperature, or to reduce motor noise.

Harmonic Reduction
Because all standard Guard-AC reactors are compensated for harmonics (current and frequency), they are extremely effective at reducing the amount of harmonics which are produced by a drive/inverter. Use 5% impedance, harmonic compensated reactors for best reduction of harmonic distortion.

Percent Harmonics vs Total Line Impedance Total Input Impedance
Harmonic	3%	4%	5%	6%	7%	8%	9%	10%
5th	40	34	32	30	28	26	24	23
7th	16	13	12	11	10	9	8.3	7.5
11th	7.3	6.3	5.8	5.2	5	4.3	4.2	4
13th	4.9	4.2	3.9	3.6	3.3	3.15	3	2.8
17th	3	2.4	2.2	2.1	0.9	0.7	0.5	0.4
19th	2.2	2	0.8	0.7	0.4	0.3	0.25	0.2
%THID	44.13	37.31	34.96	32.65	30.35	28.04	25.92	24.68
TRMS	1.09	1.07	1.06	1.05	1.05	1.04	1.03	1.03

Reactor Linearity

This curve illustrates the linearity of Guard-AC reactors. Even at 150 percent of their current rating, these reactors still have 100% of their nominal inductance. This assures maximum filtering of distortion even in the presence of severe harmonics and best absorption of surges. The typical tolerance on rated inductance is plus-or-minus 5 percent.

You Benefit From These Unique Features

HARMONIC COMPENSATION makes Guard-AC reactors suitable for use on either the drive input or drive output. They are designed to carry full rated fundamental current plus handle current and frequencies associated with harmonics-up to 50 percent more.

TERMINALS are provided as standard to save installation cost and minimize panel space. Finger proof (IP20) terminals are provided through 80 amps, solid copper box lugs above that to 400 amps.

IGBT PROTECTION allows all MTE standard reactors to be used on the output of variable frequency drives including IGBT types with switching frequencies up to 20 KHZ. A premium dielectric system is utilized to protect the first, last and end turns from the potentially high circuit peak voltages and fast dv/dt which are experienced in applications with long leads between the inverter and motor. Additionally, the general dielectric system of each reactor is UL approved (UL-506) for 4000 volts rms.

EPOXY IMPREGNATION minimizes audible noise in the reactor and enhances structural integrity.

HIGH SATURATION CURRENT RATING of Guard-AC reactors maximizes their surge current protection capability. Guard-AC reactors absorb many of the power line disturbances which cause nuisance trips on voltage source inverters.

Motor Protection Reactors help to protect motors from the high peak voltages and fast rise times (dv/dt) which can be experienced in IGBT inverter applications when the distance between the inverter and motor is long.

Outline Dimensions

All Guard-AC reactors are supplied with field wiring terminals, as illustrated. Units rated 80 amperes or below are supplied with the international terminal block as shown. Reactors rated above 80 amperes thru 400 amperes are supplied with solid copper box lugs. Larger reactors are supplied with copper tab type terminals. Refer to these outline drawings and the table refer to the specifications document for reactor dimensions.

Motor Protection
Reactors help to protect motors from the high peak voltages and fast rise times (dv/dt) which can be experienced in IGBT inverter applications when the distance between the inverter and motor is long.

LC Type (dv/dt) Long Lead Filters
These filters are available to improve the inverter output wave form from a PWM type to a nearly sinusoidal waveform. Capacitor modules are also available for addition in the field when you already have our 5% impedance reactor installed. Ask for our IGBT Long Lead Filter brochure for more details.

Voltage Spike Protection

A 3% impedance reactor is very effective at protecting against damage to or nuisance tripping of AC voltage source inverters, due to voltage spikes.

Voltage spikes on the AC power lines cause elevation of the DC Bus voltage which may cause the inverter to "trip-off" and indicate an over-voltage protection condition. Use reactors to absorb these line spikes and offer protection to the rectifiers and DC Bus capacitors while minimizing nuisance tripping of the inverter.

NEMA 1 Cabinets

All Guard-AC reactors are available as either open type or in a NEMA Type 1 general purpose enclosure. To order a reactor mounted in a cabinet, simply change the second last digit of the part number from "0" to "1". Example RL-00802 becomes RL-00812.

Reactor Part Number	Type	W	H	D	WGT. (LBS)	Cabinet
RL-002XX, RL-004XX, RL-008XX, RL-012XX, RL-01801, RL-01802	Wall Mount	8	8	6	7	CAB-8
RL-01803, RL-025XX, RL-035XX RL-045XX, RL-055XX, RL-080XX, RL-100XX, RL-130XX, RL-160XX, RL-200XX, RL-25001	Floor	13	13	13	31	CAB-13
RL-25002, RL-25003, RL-320XX, RL-400XX, RL-500XX, RL-600XX	Floor	17	24	17	45	CAB-17
RL-750XX	Floor	24	30	24	83	CAB-24

lineinfo (orig.-8/1/02)