60Hz Line Input Reactors Liquid Cooled-RLL Series

Superior Cooling Technology. Highest Power Density. Lowest Cost Solution.

Product Overview

In 2006, CTM Magnetics produced the world’s first liquid cooled inductor. Since then, we have continued to improve upon this technology, redefining the limits of heat transfer in power electronics. Our RLL Reactors represent a culmination of nearly a decade of research and development in liquid cooled technology. Recent advancements have allowed for huge cost-optimization opportunities. With our RLL Liquid Cooled Line Reactors, for the first time, liquid cooled reactors are cheaper than their air cooled counterparts. RLL Liquid Cooled Line Reactors are a cost-optimized, high power density solution for preventing nuisance tripping and absorbing power grid disturbances that can damage variable frequency drives (VFDs) and other sensitive equipment. RLL Reactors provide an economical means to reduce downtime caused by unnecessary trips; protect equipment by absorbing voltage spikes and other transients; and reduce harmonic distortion. By leveraging superior heat removal technology, CTM was able to engineer an extremely economical, yet highly reliable product line.

Line Reactor Applications

  • Prevent Nuisance Tripping and eliminate expensive downtime
  • Protect Drive Electronics by absorbing voltage spikes
  • Reduce Harmonic Distortion and protect sensitive electronics

Liquid Cooled Advantages

  • Highest Power Density
  • Lowest Audible Noise with magnetostriction-free design and epoxy enclosed magnetics
  • Thermal Isolation from nearby electronics
Impedance Levels

3% and 5% (at 480 V)

Voltage Range

Up to 690 V

Fundamental Frequency

50/60 Hz

Current Range

3% Z: 360 - 1,440 A 5% Z: 240 - 1,440 A

Agency Recognitions

cЯUus 1446

Overload Capability

150% rated current for 1 minute

Maximum Coolant Temperature

50 °C (122 °F) (higher with de-rating)

Approved Coolants

Drinking Water Water-Glycol mixture For R134A, contact CTM

Cooling System Materials

Aluminum (standard) Copper

Heat Removal

97% to Liquid Coolant 3% to Ambient Air

Maximum Ambient Temperature

70 °C (158 °F)

Maximum Altitude

No Limit

Inductance Curve

81% at 150% load 68% at 200% load 53% at 300% load

Line Reactor Applications

  • Drive Protection: CTM line reactors absorb voltage spikes, voltage transients, and other power line disturbances, extending the life of motor drive electronics, bridge capacitors, and semiconductors.
  • Minimize Nuisance Tripping: AC voltage spikes lead to rapid rises in the DC Bus voltage, causing the inverter to shut-off due to over-voltage. Line reactors absorb voltage spikes, significantly reducing nuisance tripping.
  • Reduce Harmonic Distortion: 6-pulse rectifiers are nonlinear loads that create significant harmonics; line reactors provide impedance to reduce harmonics, helping applications meet IEEE 519.
  • Protect Sensitive Equipment: Line reactors also provide protection for nearby equipment sensitive to harmonics distortion created by nonlinear loads.
  • Cost-Optimized Solution: CTM has leveraged its liquid cooled technology to provide you with reliable and economical reactors for your line filtering needs.

Liquid Cooled Advantages

  • Highest Power Density: Superior heat removal technology enables smaller magnetics, yielding the highest power density reactors available. Low surface temperatures eliminate clearance requirements, further increasing “effective” power density.
  • Thermal Isolation: With up to 97% of heat removed through the coolant, liquid cooled reactors have negligible effects on cabinet air temperature. No climate control required.
  • Sealed Design for Harsh Environments: RPL Reactors are environmentally sealed, creating an extremely rugged and reliable design ideal for use in the harsh environments.
  • Extremely Low Audible Noise: Due to superior materials and geometric shapes, magnetostriction-induced noise is significantly lower in CTM Reactors. When combined with a sealed package, the result is a nearly silent solution.

CTM Line Reactors are the ideal filtering solution for practically any 6-pulse rectifier or inverter. Install 3% impedance reactors for absorption of AC power line voltage spikes and to reduce 90% of nuisance tripping. Use a 5% impedance reactor to protect against 99% of grid voltage spikes, and to protect the grid from drive induced harmonics and help you meet IEEE 519. The largest companies in the world rely on CTM technology, with more than 200,000 installed units in some of the harshest environments on the planet.

Thermal Isolation

CTM liquid cooled reactors will have negligible temperature effects when installed in an existing cabinet. Liquid cooled inductors are thermally isolated from their enclosures, meaning a majority (97%) of the heat is removed directly through the liquid coolant.

In this example, both an air cooled and a liquid cooled reactor are sized for a 600 HP motor application; both reactors are identically 99.5% efficient (0.5% power loss). The air cooled reactor rejects 3,000 watts to the cabinet air, while the equivalent liquid cooled reactor only rejects 90 watts to the air. The remaining 2,910 watts are removed directly by the liquid coolant.

As can be seen in the graph, in a typical NEMA 3R cabinet, installation of an air cooled reactor will increase cabinet air temperature by 20.9°C . The equivalent liquid cooled reactor raises cabinet air temperature by only 1.4°C. The low temperature rise provided by liquid cooled reactors yields increased reliability for all electronics within the cabinet. Low surface temperatures also allow the liquid cooled reactor to smaller clearances, increasing effective power density further.

60Hz Line Input Reactors Liquid Cooled-RLL Series