| Brand | ROCKWILL |
| Series | RVR |
| Rated Voltage | 6kV-33kV |
| Rated Current | 50-600A |
| Capacity | 30-990kVA |
| Rated Frequency | 50Hz |
The Rockwill RVR-1 is a fully automated, maintenance-free single-phase step voltage regulator designed for reliable voltage regulation in 11 kV to 33 kV distribution networks. Built as an oil-immersed autotransformer with an integrated on-load tap changer (OLTC), it delivers ±10% regulation across 32 steps (approximately 0.625% per step) to maintain stable output voltage under varying load and source conditions.
A microprocessor-based controller continuously monitors load-side voltage and current through internal potential and current transformers, automatically adjusting tap positions to keep line voltage within the programmed target range. This closed-loop control compensates for voltage drops on long feeders, load fluctuations, and source-side instability common in weak or extended distribution systems.
The regulator features an IP-rated hermetically sealed tank that eliminates moisture ingress and oil oxidation, supporting long-term maintenance-free operation in outdoor environments. The sealed design withstands severe weather, corrosion, and temperature extremes without requiring periodic inspection or oil replacement.
Available in multiple voltage ratings between 11 kV and 33 kV, the RVR-1 supports pole-mounted, pad-mounted, or substation installation, making it adaptable to diverse distribution network architectures.
Fully automated operation：Microprocessor-based controller provides real-time tap adjustment without manual intervention, maintaining stable output voltage across all load conditions
Maintenance-free sealed design：IP-rated hermetically sealed tank prevents moisture ingress and oil oxidation, eliminating periodic maintenance and reducing lifecycle cost
Precision step regulation：Fine-resolution tap changer delivers tight voltage correction for sensitive loads and long distribution feeders
On-load tap changing：Motor-driven OLTC enables tap transitions under load without service interruption
Oil-immersed construction：Proven insulation and thermal performance for reliable outdoor, all-weather operation
Flexible deployment：Pole, pad, or substation mounting with standard brackets or base plates
Digital connectivity：Programmable controller with remote communication capability for SCADA integration
Standardized compliance ：Designed to IEC 60076-21 and IEEE C57.15 for international market acceptance
50Hz
| Voltage (kV) | Current (A) | Capacity (kVA) | BIL (kV) | Power Frequency Withstand Voltage (kV) | Insulation Class |
|---|---|---|---|---|---|
| 6 / 6.35 | 50 | 30/32 | 75/95 | 28 | A |
| 100 | 60/64 | ||||
| 150 | 90/95 | ||||
| 200 | 120/127 | ||||
| 300 | 180/191 | ||||
| 400 | 240/254 | ||||
| 500 | 300/318 | ||||
| 600 | 360/381 | ||||
| 11 | 50 | 55 | |||
| 100 | 110 | ||||
| 150 | 165 | ||||
| 200 | 220 | ||||
| 300 | 330 | ||||
| 400 | 440 | ||||
| 500 | 550 | ||||
| 600 | 660 | ||||
| 15 | 50 | 75 | 125/150 | 50 | |
| 100 | 150 | ||||
| 150 | 225 | ||||
| 200 | 300 | ||||
| 300 | 450 | ||||
| 400 | 600 | ||||
| 500 | 750 | ||||
| 22 | 50 | 110 | |||
| 100 | 220 | ||||
| 150 | 330 | ||||
| 200 | 440 | ||||
| 300 | 660 | ||||
| 33 | 50 | 165 | 170/200 | 70 | |
| 100 | 330 | ||||
| 150 | 495 | ||||
| 200 | 660 | ||||
| 250 | 825 | ||||
| 300 | 990 |
The RVR-1 single-phase oil-immersed automatic voltage regulator offers four basic wiring configurations for applying single-phase regulators in single-phase and three-phase systems. Voltage regulation is realized by the single-phase regulators.
Three single-phase regulators connected in star a triphasic line with grounded neutral providing the system with 10% of the regulation range
Three single regulators connected in star a triphasic line with grounded neutral providing the system with 10% of the regulation range. 
Urban and rural distribution lines：The step voltage regulator stabilizes voltage and solves low voltage and drift issues in long-distance power supply.
New energy grid connection：The voltage regulator balances voltage fluctuations for photovoltaic and wind power stations.
Industrial & mining power supply：The step voltage regulator guarantees stable power for heavy-load equipment against voltage surges and drops.
Rural grid renovation：The voltage regulator adapts to decentralized loads and improves overall power supply quality.
Substation supporting：The step voltage regulator optimizes system voltage as terminal regulation equipment.
Remote mountainous & island power supply：The voltage regulator suits harsh environments for unattended steady voltage regulation.
Built as an autotransformer, the 32-step Voltage Regulator delivers a ±10% total regulation range across 32 steps (approximately 0.625% per step) for smooth, high-precision line voltage correction.
Yes, this Voltage Regulator incorporates an advanced motor-driven on-load tap changer (OLTC) that seamlessly transitions tap positions under load without any service interruption to consumers.
The Voltage Regulator supports flexible pole-mounted, pad-mounted, or substation mounting, and provides digital programmable communication ports for real-time SCADA integration.
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