60Hz Silicon Carbide Line/Load Reactors- RSL Series

Superior Cooling Technology. Highest Power Density. High Performance Solution.

Product Overview

RSL Liquid Cooled Reactors are high performance filtering solutions designed for the next generation of drives. Whether it be a drive with silicon carbide components or a typical application with high switching frequencies and/or high THD-i, these high performance reactors will stand up in some of the most demanding applications. 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.

Liquid Cooled Advantages

  • Highest power density
  • Lowest audible noise
  • Sealed design for harsh conditions
  • Thermally isolated from ambient

Reactor Applications

  • Specially Developed for SiC Switching Frequencies
  • Perfect for High Frequency, High THD Applications
  • Incredible Inductance Stability Up to 500% Rated Current
Impedance Levels

3% and 5% (at 480 V)

Typical Applications

Line Reactors (bridge rectifiers) Line Reactors (active front ends) Load Reactors SiC Switching Frequencies

Voltage Range

Up to 690 V

Fundamental Frequency

Up to 200 Hz (in most applications)

Maximum Altitude

No Limit

Maximum Switching Frequency

Up to 50 kHz

Current Range

130 - 1,440 A

Overload Capability

200% rated current for 1 minute

Maximum Coolant Temperature

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

Inductance Curve

93% at 150% load 86% at 200% load 57% at 500% load

Approved Coolants

Drinking water Water-glycol mixture For R134A, contact CTM

Plumbing Material Options

Aluminum (standard) Copper

Heat Removal

97% to Liquid Coolant 3% to Ambient Air

Maximum Ambient Temperature

70 °C (158 °F)

Agency Recognitions

cЯUus 1446

Product Highlights

  • High Performance Solution: Our RSL Reactors are high performance, next-generation, liquid cooled reactors designed specifically for applications with high switching frequencies and high THD-i. Extremely low core losses enable these reactors to excel where other reactors fail.
  • Silicon Carbide Capable: This product line is designed specifically with SiC applications in mind. SiC switching devices are quickly being adopted in industry due to their fast switching speeds and low losses. While other reactors cannot handle the speed, RSL reactors are built for switching speeds up to 50 kHz.
  • Inductance Stability: RSL reactors maintain their inductance over a wide frequency range. Inductance remains stable (<110% rated inductance) at low current levels, and drops off slowly at high current levels. At 200% rated current, 86% of the rated inductance is still available. At 500% reactors maintain and incredible 57% of their rated inductance.
  • Noisy Signals (high THD-i): These reactors are the ideal for signals with very high current harmonics. With superior performance, these harmonics lead to minimal additional heat.

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.

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 Silicon Carbide Line/Load Reactors- RSL Series