Vziman RVR Pole Mounted Voltage Regulators Boost Russia Rural Grid Modernization

The rural distribution network modernization project in Altai Krai, Western Siberia, has reached a successful milestone. Twenty-nine units of RVR 10 kV pole-mounted on-load automatic voltage regulators from Vziman are now fully operational, upgrading 180 kilometers of distribution lines across the region.

Defying Extreme Cold at -45°C

Altai Krai’s harsh continental climate, with winters reaching -45°C, poses significant challenges for power infrastructure. Historically, the region’s radial overhead lines suffered from terminal voltage deviations as low as -17%, impacting 45,000 residents in 78 villages.

Vziman’s RVR regulators were specifically engineered for these conditions:

• Cold-Resistant Materials: Specialized seals and mechanical components prevent embrittlement in extreme sub-zero temperatures.
• Hermetic IP55 Protection: The fully sealed welded structure protects against heavy snow and ice accumulation.
• Compliance & Certification: The units are EAC certified and fully compliant with GOST and TR CU technical standards for the Eurasian Economic Union.

Precision Regulation and Enhanced Power Quality

The RVR units (300 kVA capacity) feature a 16-step automatic regulation system (1.25% per step) with a ±10% range. Post-commissioning data reveals that voltage at the furthest end of the 38 km line has stabilized at ~9.8 kV, up from 8.3 kV. This brings the voltage deviation to within -2%, exceeding the GOST 32144 requirement of ±5%.

Sustainable Maintenance and Reliability

The deployment ensures reliable power across a 95-square-kilometer area. The maintenance-free design is particularly vital for the Siberian winter, reducing the need for manual inspections in dangerous weather while safeguarding the local power supply.

Vziman continues to provide full life-cycle technical support and operational data analysis, furthering the modernization of Russia’s rural energy infrastructure.