High-voltage disconnectors produced by the «SVEL» Group are designed for reliable transmission of nominal current and for performing operations of connecting and disconnecting de-energized sections of an electrical circuit that are under voltage. They also provide grounding of disconnected sections using grounding knives and are capable of disconnecting no-load currents of transformers, as well as charging currents of overhead and cable lines.

Main technical characteristics:

• Nominal voltage: 35 kV and 110 kV.
• Nominal current: from 630 A to 2500 A depending on the model.
• Thermal withstand current: from 25 kA to 40 kA.
• Mechanical endurance: at least 10,000 "on-off" cycles.
• Service life: at least 30 years.

Advantages of «SVEL» disconnectors:

• Compliance with Russian and international standards.
• Universal design allowing the installation of the grounding knife on either side, eliminating design errors and reducing the volume of spare parts.
• Silver-plated main contacts and nickel-plated grounding contacts ensure stable electrical contact.
• Suitable for use in digital substations due to the monitoring and control system installed according to IEC 61850 standard.
• Ease of installation and minimal assembly time on site due to a high degree of factory assembly and equipment setup.

Operating conditions:

Disconnectors and drives are manufactured in UHL climatic version, placement category 1 according to GOST 15150, and are intended for outdoor installation at altitudes up to 1000 m above sea level in areas with moderate and cold climates. They are designed to operate in ambient temperatures from -60 °C to +40 °C and are resistant to icing and wind exposure.

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