Medium Voltage

Multi-Step Capacitor Banks

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Specifications

Best For: Industrial plants with shifting loads and utilities requiring precise VAR control.
Function: Automatically senses load changes and switches capacitor steps via vacuum contactors to maintain high efficiency.
Key Specs: 2.4kV–38kV; Microprocessor-based VAR controllers; Vacuum switching technology.
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For systems with varying loads, these units utilize multi-step switching to maintain a target power factor without causing over-voltage conditions during light loads.

Medium Voltage

Fixed Capacitor Banks

Specifications

Best For: Individual large motor compensation and constant-load transformers.
Function: Provides a continuous source of kVAR at the load to reduce utility demand charges and system heat losses.
Key Specs: NEMA 3R enclosure; internal/external fusing options; low-loss film/foil design.
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The most cost-effective solution for constant reactive power compensation at the medium voltage level.

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Medium Voltage

Harmonic Filter Banks

Specifications

Best For: Mining, pulp/paper mills, and sites requiring IEEE 519 harmonic compliance.
Function: Combines capacitors with iron-core or air-core reactors to “trap” harmonic currents and prevent system resonance.
Key Specs: Custom-tuned (e.g., 4.2nd or 4.7th harmonic); High-Q factor reactors.
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Designed to protect equipment from the damaging effects of non-linear loads like VFDs and large rectifiers.

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Medium Voltage Pad Mounted

Capacitor Equipment

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Specifications

Best For: Hospitals, university campuses, and commercial underground networks.
Function: Provides localized power factor correction in a tamper-resistant, aesthetically discrete cabinet.
Key Specs: 5kV–35kV; Tamper-proof NEMA 3R; Dead-front safety configuration.
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A low-profile, “dead-front” design optimized for underground distribution and public-access areas.

Medium Voltage Pole Mounted

Capacitor Equipment

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Specifications

Best For: Utility distribution feeders and rural cooperatives.
Function: Boosts voltage at the end of long feeders and increases the current-carrying capacity of overhead lines.
Key Specs: Stainless steel or aluminum frames; bird and animal guards included.
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Engineered for overhead distribution lines to improve voltage profiles and reduce line losses.

Medium Voltage

Surge Protection Equipment

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Specifications

Best For: Protecting high-value assets like transformers, motors, and switchgear.
Function: Diverts high-voltage surges safely to ground, preventing insulation breakdown and equipment failure.
Key Specs: Station-class or intermediate-class arresters; customizable surge capacitor integration.
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Controllix SurgePack helps protect motors, rotating machines, and transformers from damaging overvoltages caused by transients, faults, power surges, and lightning strikes.

Combining station-class metal oxide surge arresters with specially designed surge capacitors, SurgePack limits peak voltage and controls its rate of rise to reduce stress on winding insulation and support reliable operation.

Medium Voltage Rack-Mounted

Capacitor Equipment

Specifications

Best For: Utility-scale substations and indoor industrial electrical rooms with restricted access.
Function: High-density reactive power compensation where external metal-enclosure safety is not required.
Key Specs: Modular rack design; galvanized steel or aluminum construction; easy fuse access.

Open-frame configurations designed for installation within existing fenced substations or indoor vaults.

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Medium Voltage

Mobile Capacitor Equipment

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Specifications

Best For: Temporary substation bypass, seasonal load peaks, and emergency grid support.
Function: Provides rapid-deployment power factor correction for utility maintenance or temporary industrial setups.
Key Specs: DOT-compliant trailers; integrated vacuum breakers; rapid-connect bushings.
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A trailer-mounted or skid-mounted solution for temporary power quality needs or emergency restoration.

Medium Voltage Power Quality & Substation Solutions

Controllix Medium Voltage (MV) solutions range from 2.4kV to 38kV and are engineered to optimize power factor, stabilize voltage, and mitigate harmonics in heavy industrial and utility environments. Our metal-enclosed and pad-mounted designs provide superior safety and environmental protection compared to open-rack systems. By integrating advanced vacuum switching and microprocessor-based protection, Controllix MV equipment ensures IEEE 519 compliance and protects high-value upstream infrastructure like power transformers and switchgear.

The Advantage of Metal-Enclosed MV Systems

Unlike traditional open-rack installations, Controllix specializes in Metal-Enclosed Medium Voltage equipment. This design offers several critical advantages:

  1. Enhanced Safety: Eliminates exposure to energized components, reducing the risk of accidental contact and arc-flash incidents.
  2. Environmental Durability: NEMA 3R or custom enclosures protect capacitors and controls from wildlife, salt spray, and extreme weather.
  3. Compact Footprint: Engineered for space-constrained substations or industrial sites.
  4. Factory Assembled & Tested: Reduces on-site commissioning time and ensures all components are tuned as a single system.

Case Studies

Frequently Asked Questions

Secure Your Infrastructure

Ready to eliminate reactive power penalties? Contact our engineering team for a custom Medium Voltage quote or a comprehensive Power System Analysis.

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