Medium Voltage Current Limiting Reactor
Advanced Current Limiting Reactors for Enhanced Grid Reliability
AI and digitalization are driving unprecedented electricity demand. However, the existing rated capacity switching equipment can no longer handle the dramatic increase, which puts your grid at risk of dangerous fault currents. LTECPower’s medium voltage current limiting reactor offers you a smarter alternative. With a cost-effective, high-linearity, dry-type air-core design, our current limiting reactor never saturates during faults.
By connecting precisely calculated inductive reactance in series, our current-limiting reactors effectively limit short-circuit currents, protecting your transformers and circuit breakers from mechanical stress and thermal effects. While maintaining excellent power quality, our reactors are ideal for bus connections, feeder circuits, and generator outlets, minimizing your system losses and seamlessly integrating into your existing retrofit projects.
Technical Specifications & Standard Parameters
| Parameter | Specification (Standard Range) | Reference Standard |
|---|---|---|
| Rated System Voltage | 1kV to 33kV (Up to 15.75kV for ED3PH) | IEC 60076-6 / IS-5553 |
| Rated Current | 5A to 2000A | |
| Reactance Voltage Drop | 2% – 8% (Typical) | |
| Rated Frequency | 50 Hz / 60 Hz | |
| Insulation Class | Class B, F (155°C), or H (180°C) | |
| Cooling Method | Air Natural (AN) | |
| Short-Circuit Duration | 1.0 Sec / 3.0 Sec |
High-Reliability Medium Voltage Current Limiting Reactors
Expanding your power grid may put pressure on parallel transformers, pushing fault currents beyond what your switchgear can handle. However, replacing all circuit breakers in the system would significantly increase your grid cost and complexity.
LTECPower’s medium voltage current limiting reactors inject precisely calculated inductive reactance into your system, effectively limiting the rate of current rise (di/dt) within the first cycle.
Unlike iron-core reactors, our reactors never saturate, even at currents up to 30x rated, reducing fault currents to levels your existing circuit breakers can handle, with consistent protection, reliable performance, and no costly replacements.
A severe short circuit may trip your breakers and create explosive thrust inside the coil. If left unchecked, the force would lead to winding deformation and insulation breakage, triggering a devastating secondary short circuit.
Built to stop that cascade, LTECPower’s current limiting reactors are encapsulated in a rigid glass-fiber and epoxy resin unit. Combined with advanced winding and transposition technology, the reactor ensures you have extremely uniform current distribution without dead zones and localized overheating.
With exceptional mechanical stability, the current limiting reactors can maintain stable operation with zero displacement for 1.0 to 3.0 seconds after a short circuit impact, making them ideal for the toughest environments — heavy industry, mining, and beyond.
Reactors generate heat during long-term operation, and it is unavoidable. The continuous heat drives up your electricity bills and accelerates insulation aging. Over 20 years, that hidden energy loss results in high operational costs.
LTECPower’s MV current limiting reactors are engineered differently. Harnessing the “chimney effect” for natural-air cooling, coupled with optimized conductor cross-sections, our reactors keep the temperature rise strictly within Class H (180°C) limits.
With a high efficiency over 99.5%, the current limiting reactors deliver you exceptional stability and reliability, less energy loss, lower electricity bills, long-term savings, and are built for the long run.
Technical Performance and Operational Value
| Parameter | CLR Standard Detail | What It Means for You |
|---|---|---|
| Impedance Linearity | Constant (Air-Core) | Reliable protection even during 27kA+ peak faults. |
| Losses / Efficiency | Up to 99.8% Efficiency | Minimal impact on operational costs and heat dissipation. |
| Maintenance | Virtually Zero (Dry-type) | No oil leaks or complex monitoring; reduced downtime. |
| Voltage Drop | Negligible at Normal PF | Maintains power quality without affecting voltage regulation. |
Typical Applications of MV Current Limiting Reactors
Whether you want to expand power grids to critical bus-tie couplings and downstream distribution lines, LTECPower’s current limiting reactors deliver you precise impedance wherever fault isolation and switchgear protection
Power Plant Expansions
If you are expanding your power plant, then our current limiting reactors can limit the fault current, so you can expand without replacing your switchgear.
Bus-Tie Interconnections
Installed between bus sections, our current limiting reactors allow power interchange while restricting fault disturbances within the faulty section.
Feeder and Line Protection
Connected in series with the distribution feeder, our limiting reactors reduce fault levels on individual circuits and downstream cables, protecting your equipment.
Providing perfect linearity, low maintenance, and environmental friendliness, our MV current limiting reactors never saturate even during high-current faults.
Under normal power factor, our current limiting reactors’ voltage drop is typically around 1%. If your system experiences excessive drop, you can add parallel capacitors to compensate for it.
Yes. With UV-resistant coatings and specially designed insulators, our MV current limiting reactors are built to perform reliably in any outdoor condition with reliable and stable operation.
You can connect multiple power sources to the grid without interrupting the power supply, and without upgrading your switchgear.
Yes. Our MV current limiting reactors are designed and tested strictly to IEC 60076-6, IEEE C57.16, and other relevant global standards.
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