Pages Header Banner 2
Pages Header Banner 1
Pages Header Banner 3

Toll Free: 1.800.387.2840

Downloads

Automatic Under Load Voltage Regulators

Today’s solution to SCR Drive/Inverter problems

 

Inductors placed at the input and output of electrical equipment can provide protection and improve performance. Line Reactors absorb many power line disturbances which could damage or shut down your inverters, variable speed controllers, or other voltage-sensitive equipment.

 

  • Rex Line Reactor designs conform to UL, CSA, and IEC international standards.
  • Three phase AC line reactors when used as input or output filters on inverter electronic speed drive applications provide several significant benefits which are explained in this catalogue.
  • Rex Motor Guarding Transient Filters incorporate reactors and resistors. When these devices are placed on the output of adjustable frequency drives they protect the motor windings from the damaging voltage spikes associated with the fast switching effects of IGBT’s and long lines and cables. 

Features

  • Easy to install
  • High saturation levels
  • Smaller and less expensive than isolation transformers
  • Reduce harmful surge current
  • Available in open or NEMA 1 enclosed construction
  • Conforms to CSA, UL, and IEC standards
  • Available in a wide range of standard ratings
  • IS0 9001 registered quality system
  • CE marking available

Benefits

  • Reduce electrical line noise
  • Protect and extend the life of S.C.R.’s and transistors
  • Filter power line disturbances
  • Limit short circuit currents
  • Important in achieving compliance to IEEE 519
  • Reduce harmonic distortion
  • Reduce nuisance tripping
  • Reduce Telephone Influence Factor (TIF)
  • DIN rail mounting available in some ratings

Link: Applications & Benefits of Line Reactors on the Input side
Link: Applications & Benefits of Line Reactors on the Output side
Link: Guide for Reactor Selection and Dimensions
Link: Download the Complete Reactor Catalog 

Construction

General

Traditionally the construction of Line Reactors has presented a challenge for manufacturers because, by the nature of their application, reactors are regularly subjected to overload conditions and severe power disturbances.

To control their impedance, Line Reactors are manufactured with gaps in their magnetic flux path. Maintaining the mechanical integrity and the consistency of these gaps requires particular care during engineering, design, and construction.

Rex Power Magnetics through years of experience in reactor applications has developed a unique combination of design techniques, utilizing materials and assembly practices that result in a product with reduced losses and low audible sound levels, providing years of reliable service under adverse conditions.

Core

Manufactured from low loss, grain oriented silicon steel shunts, and assembled to reduce audible sound and minimize core losses.

Windings & Insulation

Class 220°C, 185°C, or 155°C insulation is utilized depending on the size. All reactors have a standard 115 °C temperature rise. The windings are of all copper construction, with terminals that are brazed or brought to terminal blocks depending on the size.

he complete unit is impregnated with high temperature polyester varnish, and baked.

Gap

The impedance of the reactor is controlled and tuned by accurately maintaining the gap in the flux path. This is achieved using high temperature withstanding NomexTM and fiberglass spacers, which are reinforced by an epoxy baked compound to reduce sound levels.

Assembly & Brackets

 

The reactor windings are secured to the core by high temperature fiberglass pultrusions. The core is framed at the top and bottom by formed steel brackets and braced by non-magnetic (stainless steel or bronze) tie bolts to minimize losses, reduce noise (hum), and provide exceptional mechanical strength.

Enclosures

 

Reactor enclosures are manufactured from 14 gage formed steel panels which are washed, rinsed, corrosion coated and painted with ASA 61 grey powder paint suitable for most industrial and commercial applications. When ordering an enclosure alone for use with an open-type (core & coil) unit, a special bracket is required for mounting. Contact our office for details.

Standard Technical Specifications

  • Max ambient temperature 40°C.
  • Insulation class 155°C—Temperature rise up to 100°C.
  • Insulation class 185°C—Temperature rise up to 115°C.
  • Insulation class 220°C—150°C rise maximum.
  • CSA certified / UL listed
  • Current overload capability: 150% for 1 min.
  • Saturation rating: not less than 250% of rated current (50% rated inductance min. at 350% rated current).
Figure 1: Excellent saturation characteristics of Rex reactors

Figure 1: Excellent saturation characteristics of Rex reactors

  • Audible sound level:0—15 Amp. 60dB. Max.
    16—100 Amp. 65dB. Max.
                                        101—350 Amp. 70dB. Max.
                                        351—600 Amp. 75dB. Max.
  • Harmonic compensation: suitable for operation with non-sinusoidal load currents with up to 50% total harmonic distortion.

Test and Quality Inspection

  • Dimensions (core & coil, and enclosure)
  • Mechanical security of assembly, terminals, hardware
  • Appearance (core & coil, enclosure, paint and finishing)
  • Electrical wiring, grounding and markings
  • Impulse: 4000 V for one min. winding to winding and winding to core ground.
  • Impedance measurement and tolerances.
  • Audible sound at rated current.
  • ISO 9001 quality assurance.
Rating
HP
Voltage= 208 Volts

Voltage= 240 Volt

Maximum
Current
(Amps)
Impedance Maximum
Current
(Amps)
Impedance

3% 5% 3% 5%
1
1.5
2
4
8
8
3PR-0004C3L
3PR-0008C3L
3PR-0008C3L
3PR-0004C5L
3PR-0008C5L
3PR-0008C5L
4
8
8
3PR-0004C3L
3PR-0008C3L
3PR-0008C3L
3PR-0004C5L
3PR-0008C5L
3PR-0008C5L
3
5
7.5
11
17
27
3PR-0011C3L
3PR-0017C3L
3PR-0027C3L
3PR-0011C5L
3PR-0017C5L
3PR-0027C5L
11
17
27
3PR-0011C3L
3PR-0017C3L
3PR-0027C3L
3PR-0011C5L
3PR-0017C5L
3PR-0027C5L
10
15
20
34
45
60
3PR-0034C3L
3PR-0045C3L
3PR-0060C3L
3PR-0034C5L
3PR-0045C5L
3PR-0060C5L
27
45
60
3PR-0027C3L
3PR-0045C3L
3PR-0060C3L
3PR-0027C5L
3PR-0045C5L
3PR-0060C5L
25
30
40
80
100
130
3PR-0080C3L
3PR-0100C3L
3PR-0130C3L
3PR-0080C5L
3PR-0100C5L
3PR-0130C5L
80
80
100
3PR-0080C3L
3PR-0080C3L
3PR-0100C3L
3PR-0080C5L
3PR-0080C5L
3PR-0100C5L
50
60
75
160
160
200
3PR-0160C3L
3PR-0160C3L
3PR-0200C3L
3PR-0160C5L
3PR-0160C5L
3PR-0200C5L
130
160
200
3PR-0130C3L
3PR-0160C3L
3PR-0200C3L
3PR-0130C5L
3PR-0160C5L
3PR-0200C5L
100
125
150
255
320
410
3PR-0255C3L
3PR-0320C3L
3PR-0410C3L
3PR-0255C5L
3PR-0320C5L
3PR-0410C5L
255
320
410
3PR-0255C3L
3PR-0320C3L
3PR-0410C3L
3PR-0255C5L
3PR-0320C5L
3PR-0410C5L
200
250
300
500
600
750
3PR-0500C3L
3PR-0600C3L
3PR-0750C3
3PR-0500C5L
3PR-0600C5L
3PR-0750C5
500
600
750
3PR-0500C3L
3PR-0600C3L
3PR-0750C3
3PR-0500C5L
3PR-0600C5L
3PR-0750C5
350
400
500
1000
1000
1250
3PR-1000C3
3PR-1000C3
3PR-1250C3
3PR-1000C5
3PR-1000C5
3PR-1250C5
1000
1000
1250
3PR-1000C3
3PR-1000C3
3PR-1250C3
3PR-1000C5
3PR-1000C5
3PR-1250C5