Drive Input/Output Chokes and Harmonic Reactors
The widespread adoption of Variable Speed Drives (VSDs)—also known as Variable Frequency Drives (VFDs)—has revolutionized industrial automation by enabling precise motor speed control, significant energy savings, and improved process efficiency. These benefits are especially critical in applications such as pumps, fans, compressors, and conveyors, where partial-load operation is common.
VFDs and other solid-state power electronics (e.g., inverters, rectifiers, and servo drives) draw non-linear current from the AC supply.
Product Details
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Features
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Drive Chokes
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Harmonic Reactors
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Capacity Range
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3 kVA – 500 kVA (Air-Cooled)
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Input Voltage
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295V – 465V / 340V – 480V (other ranges available)
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Output Voltage
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380V / 400V / 415V ±1% (adjustable)
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Efficiency
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Up to 98% (as per IS standards)
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Connections
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3 Phase + Neutral + Ground
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Frequency
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50/60 Hz
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Correction Speed
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20V/sec – 110V/sec (as required)
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Cooling System
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Natural / Forced Air Cooled
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Duty Cycle
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Continuous, 24x7
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Waveform Distortion
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Nil
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Power Factor Effect
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Nil
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Noise Level
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< 65 dB (at 1 meter)
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Standards Compliance
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IS:9815 & ISO 9001:2015
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Key Features
- Reduce harmonic distortion (THD) on AC mains
- Protect capacitor banks from overload and failure
- Prevent harmonic amplification in PFC systems
- Stabilizer Bypass System – Built-in up to 300 kVA
- CRGO core for low core loss
- Copper or aluminum windings
Quality & Testing
- ISO 9001:2015 Certified manufacturing
- Compliance with IS:2026 and international reactor standards
- Core: CRGO, low-loss, rectangular construction
- Winding: Multiple parallel conductors to reduce skin effect
- Warranty: 1 year (air-cooled models)
- Efficiency: >98% (minimal power loss)
Applications
- Input Chokes:VFDs, servo drives, UPS systems, CNC machines, HVAC systems
- Output Chokes:Long motor cables (>50m), submersible pumps, elevators, extruders
- Harmonic Reactors:Industrial PFC panels, data centers, textile mills, welding plants, renewable energy inverters
Three Phase Air-Cooled Servo Voltage Stabilizer
Beta Power Controls in India?
17+ Years of Expertise
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ISO 9001:2015 compliant
Customization
Voltage ranges and models tailored to client needs
High Efficiency
98% energy efficiency, reduces power loss
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After-Sales Support
Installation, service, and technical assistance
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Frequently Asked Questions
Input chokes protect the drive from the grid (reduce harmonics entering the drive). Output chokes protect the motor from the drive (dampen PWM voltage spikes and dv/dt stress).
Built-in inductors help, but external AC line chokes provide superior harmonic mitigation and surge protection—especially in weak grids or multi-drive installations.
Standard capacitors can resonate with system harmonics, causing overheating or explosion. Detuned reactors shift the resonance frequency below dominant harmonics (e.g., 210 Hz for 5th harmonic), making PFC safe.
Yes—custom inductance (%, mH), current rating, voltage, IP rating, and mounting options are available per customer PO.
Absolutely—harmonic reactors are critical in solar farms to stabilize grid-tied inverters and meet IEEE 519 harmonic limits.