Arc Suppression Coils and Earthing Transformers
Our company cooperates with leading European manufacturers of Arc Suppression Coils and Earthing Transformers, providing customers with reliable and proven solutions for medium- and high-voltage power networks.
We support our clients throughout the entire project lifecycle, including technical consulting, equipment selection, system configuration, and the development of engineering and technical documentation in accordance with applicable standards and project requirements. Our expertise allows us to offer optimized solutions tailored to specific network conditions, fault current characteristics, and operational needs.
In addition, we assist with factory coordination, delivery management, installation support, commissioning, and after-sales technical support, ensuring reliable operation and long-term performance of the supplied equipment.
Arc Suppression Coils
(Petersen Coils for earth fault current compensation)
Arc Suppression Coils, also known as Petersen Coils, are designed to compensate capacitive earth fault currents in electrical power networks. They are installed at neutral points of distribution and transmission systems and play a key role in limiting earth fault currents, reducing arc duration, and improving network reliability.
Our company supplies continuously adjustable arc suppression coils suitable for a wide range of applications in medium- and high-voltage networks, including:
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Network rated voltage: from 6 kV up to 110 kV
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Rated power: approximately 125 kVA up to 19,000 kVA
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Rated frequency: 50 Hz
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Operating duty:
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short-time duty
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continuous duty
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Adjustment range: typically 10–100% of rated current
The design and manufacturing of the supplied arc suppression coils comply with IEC 60076-6 and other applicable international standards. Each unit is engineered and configured to meet project-specific technical requirements and network conditions.
Combined Solutions
Our company also offers combined arc suppression coil solutions, where the active part of an earthing transformer and the arc suppression coil are integrated within a single housing. This configuration allows for optimized space utilization, simplified installation, and efficient system integration.
Accessories and Auxiliary Equipment
In addition to arc suppression coils, our company can supply and configure auxiliary devices according to customer requirements, including:
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Arc suppression coil current indicators
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Residual voltage (U₀) indicators
These accessories support safe operation, monitoring, and maintenance of the earthing system.
Earthing Transformers (ETR)
Earthing Transformers are applied in electrical power systems to provide a neutral point in networks where a natural neutral is not available. They enable effective grounding of medium-voltage distribution networks and ensure proper operation of protection and fault detection systems.
Our company supplies earthing transformers engineered for a wide range of network configurations, supporting reliable and safe grounding solutions in accordance with international standards and project requirements.
Typical Technical Characteristics
Network voltage levels: 6 kV, 10 kV, 15 kV, 20 kV, 35 kV, up to 52 kV
Rated power range: approximately 200 kVA to 8,000 kVA
Winding and connection arrangements: zig-zag (ZN), ZNyn11, and other configurations customized to specific system and customer requirements
Each earthing transformer is designed with consideration of network earthing philosophy, fault current levels,
and operational conditions, ensuring long-term reliability and compatibility with protection schemes.
Our company also provides engineering support, documentation development, and technical assistance
for integration of earthing transformers into new or existing power networks.
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