MTE RL-04502 Load Reactor

MTE RL-04502 Overview

The MTE RL-04502 is a 3-phase line/load reactor from MTE Corporation's renowned RL Series. It is a passive inductive component used to mitigate power quality issues, primarily by absorbing line-side disturbances and reducing harmonic distortion generated by variable frequency drives (VFDs) and other non-linear loads. It can be used on both the input (line) side and output (load) side of a drive.

Product Detailed Description

• Function:

• Reduces Harmonics: Significantly reduces harmonic distortion generated by VFDs back onto the power line (typically to 30-35% THID). This helps meet power quality standards like IEEE-519.

• Absorbs Line Disturbances: Attenuates voltage spikes, transients, and surges on the incoming power line, protecting sensitive equipment like VFDs from damage.

• Minimizes Nuisance Tripping: By improving power quality and reducing voltage spikes, it helps prevent VFDs and circuit breakers from tripping unnecessarily.

• Extends Motor Life: Reduces the dv/dt (rate of change of voltage) and peak terminal voltage at the motor, which can be damaging to motor insulation, especially with long motor lead lengths. This extends the lifespan of the motor.

• Reduces Motor Noise and Operating Temperature: Improves waveform integrity, leading to smoother motor operation, less audible noise, and reduced operating temperature.

• Line/Load Interchangeability: Designed to function effectively on both the line side (input to VFD) and the load side (output from VFD to motor) without derating.

• Features:

• Best-in-class power quality units: Known for proven performance and durability.

• Rugged and Robust: Built to withstand harsh industrial environments.

• High Continuous Service Factor: Designed for continuous operation.

• Low Watts Loss: Efficient operation, minimizing energy waste.

• Open Enclosure Type: Typically provided as an open chassis unit (IP00).

• Harmonic Compensated: Assures optimum performance in the presence of harmonics.

• 150% Continuous Overload: Capable of handling overloads for extended periods.

• Multiple Impedance Options: While this specific model is 0.7mH, RL series offers 1.5%, 3%, and 5% impedance levels (note that effective impedance can change with current).

Product Parameters

• Manufacturer: MTE Corporation

• Model: RL-04502

• Type: Line/Load Reactor

• Amperage Rating: 45 A

• Inductance: 0.7 mH

• Input Voltage Range: 208-690 V AC

• Frequency: 50-60 Hz

• Phase: 3-Phase

• Horsepower Rating (typical):

• 13 HP @ 208 V

• 14 HP @ 240 V

• 29 HP @ 480 V

• 36 HP @ 600 V

• Also listed as 25-60 hp for 400 VAC/60 hp 3-ph, and 15 hp at 480 VAC 1-ph (note specific HP varies with voltage and application)

• Impedance: Typically 3% (some sources mention 3% and 5% options for the series)

• Enclosure Type: Open (IP00)

• Heat Loss: 62 W

• Ambient Temperature: -40°C to 50°C

• Overload Rating: 200% of rated for 30 minutes, 300% of rated for 1 minute

• Temperature Rise: 135°C (average)

• Maximum Switching Frequency: 20 KHz

• Altitude Maximum (without derating): 1,000 meters

• Dimensions (approx.): 7.2 in H x 8.9 in W x 4.6 in D

• Weight: Approx. 28 lbs (12.7 kg)

• Certifications: UL-508, CSA C22.2, CE (for the series)

• Impregnation: High Bond Strength “Solvent less” Epoxy, 200°C

• dv/dt Protection: Meets NEMA MG-1, part 31 (same as inverter duty motors)

Product Advantages

• Superior Power Quality: Effectively mitigates harmonics and absorbs line disturbances, leading to a cleaner power supply for your equipment.

• Enhanced Equipment Protection: Shields VFDs and motors from damaging voltage spikes and current surges, significantly extending their lifespan.

• Reduced Downtime: Minimizes nuisance tripping, ensuring higher system uptime and productivity.

• Improved Motor Performance: Leads to cooler, quieter, and more efficient motor operation.

• Versatility: Can be used on both the line and load side, offering a flexible solution.

• Robust Construction: Built for demanding industrial environments with high durability.

• Energy Efficiency: Low watts loss contributes to overall energy savings.

• Compliance: Helps meet power quality standards like IEEE-519.

Precautions

• Correct Sizing: It is crucial to select the correct reactor size (amperage, inductance, and horsepower rating) to match your specific VFD and motor combination. Consult MTE's sizing guides or application notes.

• Installation: Install in a well-ventilated area to ensure proper heat dissipation. Adhere to MTE's installation manual, especially regarding wiring and clearances.

• Enclosure: As an "Open" type, it requires installation within an appropriate enclosure (e.g., control cabinet) to protect it from environmental factors (dust, moisture) and for safety reasons (exposed energized parts).

• Heat Dissipation: Ensure adequate airflow around the reactor to prevent overheating, especially in enclosed spaces.

• Wiring: Use appropriate wire gauges for the rated current. Ensure proper grounding.

• Harmonic Impact: While it significantly reduces harmonics, for very stringent harmonic mitigation requirements (e.g., very low THID), more advanced solutions like harmonic filters might be necessary.

• Long Lead Effects: While it helps mitigate long lead effects, for extremely long motor lead lengths, other solutions like motor termination filters might also be considered.

Product Applications

MTE RL-04502 line/load reactors are widely used in applications involving variable frequency drives (VFDs) and other sensitive electronic equipment to improve power quality and protect machinery. Common applications include:

• Motor Control Systems: Used with VFDs for pumps, fans, conveyors, compressors, mixers, extruders, etc., to protect the drive and motor.

• HVAC Systems: Improves power quality and efficiency in systems with VFD-driven fans and pumps.

• Industrial Automation: Used across various industrial processes where VFDs control motors.

• Power Quality Improvement: Installed to meet specific power quality requirements and reduce harmonic distortion on the electrical grid.

• Long Motor Lead Applications: Mitigates issues like reflected waves and excessive peak voltages that can damage motors with long cable runs from the VFD.

• Sensitive Electronic Equipment: Protection of any equipment sensitive to line disturbances and harmonics.

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