Rex Power Magnetics

Transformers

We currently stock NEMA 1, dry type products with ratings for: 600/(208/120), 480/(208/120), 240/(208/120), 230/(208/120), 480/240, 480/208, 600/240, 600/208, 240/208, and 230/208.

All Rex electric power transformers can generally be shipped from either our Western Canadian (Edmonton, Alberta, Canada) warehouse or from our Eastern Canadian (Ontario) affiliate.

We probably have a transformer in stock that will suite your needs. We carry single and 3-phase transformers in stock that range from 120 volts to 600 volts.

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600 / (208/120v)

Distribution (Three-Phase)

Model KVA Voltage Phase
BA15JM/Z 15 600/(208/120) 3
BA30JM/Z 30 600/(208/120) 3
BA45JM/Z 45 600/(208/120) 3
BA75JM/Z 75 600/(208/120) 3
BA112JM/Z 112.5 600/(208/120) 3
BA150JM/Z 150 600/(208/120) 3
BA225JM/Z 225 600/(208/120) 3
BA300JM/Z 300 600/(208/120) 3

480 / (208/120v)

Distribution (Three-Phase)

Model KVA Voltage Phase
BA15HM/Z 15 480/(208/120) 3
BA30HM/Z 30 480/(208/120) 3
BA45HM/Z 45 480/(208/120) 3
BA75HM/Z 75 480/(208/120) 3
BA112HM/Z 112.5 480/(208/120) 3
BA150HM/Z 150 480/(208/120) 3
BA225HM/Z 225 480/(208/120) 3
BA300HM/Z 300 480/(208/120) 3

480 / 240v

Auto (Single-Phase)

Model KVA Voltage Phase
MC3HC 3 480/240 1
MC5HC 5 480/240 1
MC7HC 7.5 480/240 1
MC10HC 10 480/240 1
MC15HC 15 480/240 1
MC25HC 25 480/240 1
MC37HC 37.5 480/240 1
MC50HC 50 480/240 1
MC75HC 75 480/240 1
MC100HC 100 480/240 1
MC150HC 150 480/240 1

240 / 208v

Auto (Single-Phase)

Model KVA Voltage Phase
MC3CB 3 240/208 1
MC5CB 5 240/208 1
MC7CB 7.5 240/208 1
MC10CB 10 240/208 1
MC15CB 15 240/208 1
MC25CB 25 240/208 1
MC37CB 37.5 240/208 1
MC50CB 50 240/208 1
MC75CB 75 240/208 1
MC100CB 100 240/208 1
MC150CB 150 240/208 1

600 / 240v

Auto (Three-Phase)

Model KVA Voltage Phase
RC3JC 3 600/240 3
RC6JC 6 600/240 3
RC9JC 9 600/240 3
RC15JC 15 600/240 3
RC30JC 30 600/240 3
RC45JC 45 600/240 3
RC75JC 75 600/240 3
RC112JC 112.5 600/240 3

480 / 240v

Auto (Three-Phase)

Model KVA Voltage Phase
RC3HC 3 480/240 3
RC6HC 6 480/240 3
RC9HC 9 480/240 3
RC15HC 15 480/240 3
RC30HC 30 480/240 3
RC45HC 45 480/240 3
RC75HC 75 480/240 3
RC112HC 112.5 480/240 3

480 / 208v

Auto (Three-Phase)

Model KVA Voltage Phase
RC3HB 3 480/208 3
RC6HB 6 480/208 3
RC9HB 9 480/208 3
RC15HB 15 480/208 3
RC30HB 30 480/208 3
RC45HB 45 480/208 3
RC75HB 75 480/208 3
RC112HB 112.5 480/208 3

240 / 208v

Auto (Three-Phase)

Model KVA Voltage Phase
RC3CB 3 240/208 3
RC6CB 6 240/208 3
RC9CB 9 240/208 3
RC15CB 15 240/208 3
RC30CB 30 240/208 3
RC45CB 45 240/208 3
RC75CB 75 240/208 3
RC112CB 112.5 240/208 3

Reactors

Rex Manufacturing Line and Load Reactors are Today's Solution to SCR Drive - Inverter Application 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 frequency drive (speed controllers) or other voltage sensitive equipment


Features Benefits
  • Easy to install
  • Smaller and less expensive than isolation transformers
  • Reduce harmful surge currents
  • Available in open or NEMA 1 enclosed construction
  • Conforms to CSA, UL and IEC standards
  • Built to ISO9001 quality levels
  • Available in a wide range of standard ratings
  • Reduce electrical line noise
  • Extend the life and protect SCR'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)

The Problem

The steep voltage wave fronts of the Pulse Width Modulated (PWM) output of the Adjustable Frequency Drives (AFD) produce high frequency effects which may damage the insulation of motors operated by the equipment. The problems result from two distinct effects.

The high frequencies present in the output of PWM wave forms cause reflections in long conductors connecting the motors to the drives (see image below). Harmful effects with conductors as short as 10 meters have been observed. However, the effects are most severe with cables of lengths greater than 50 meters leading to the doubling of the applied voltage. This translates to voltage peaks approaching 1600 volts in 575 volt systems.

Cable Input & Output Voltage

On the output of PWM inverters the voltage peak due to reflections in long cable lines can be 200% (as shown in the image above).

The combination of these two effects stresses the winding insulation considerably beyond design limits and has been known to shorten the insulation life and in some instances leads to early catastrophic failure of motors.

The Solution

It has been demonstrated that these transient effects can be reduced by using filters placed at the AFD's thereby allowing safe operation of the motors and an expectation of full insulation life (see figure below). After years of experience and research, Rex Manufacturing has developed a comprehensive line of state of the art output filters suitable for a wide range of prospective applications. The filters are constructed using optimized combinations of inductors, capacitors and resistors.


Cable Input & Output Voltage - Using Rex Filter

By adding a Rex motor guarding filter to the output of PWM inverters the voltage peak is reduced to less than 125% appearing at the motor as shown above.

Features of Rex AFD Output Filters: