Overhead Voltage Regulator Voltage Stabilization and Compensation 6kV-33kV

Attributes Description Documentation Resource Library

Key attributes

Brand	ROCKWILL
Series	RVR
Rated Voltage	6kV-33kV
Rated Current	50-600A
Capacity	30-990kVA
Rated Frequency	50/60 Hz

Description

Single-phase overhead step voltage regulator is an oil-immersed tap-changing autotransformer fully compliant with IEC 60076-21 special standard for line voltage regulators.
It stabilizes fluctuating feeder voltage within ±10% boost & buck range via 32 independent tap steps (0.625% adjustment per step), effectively solving voltage drop caused by long-distance lines and variable loads.
Dual 50Hz / 60Hz frequency design covers global distribution grids. Three mounting options are available: pole-mounted, pad-mounted and substation base. Hermetically sealed oil tank together with motor-driven arc-suppression tap-changer ensures stable, low-maintenance outdoor operation.

Standard Construction & Accessories

Standard Equipped

Hermetically sealed anti-corrosion welded steel tank
ONAN natural circulation cooling radiators
High-creepage medium voltage insulating bushings
Digital programmable regulator controller with data logging
Tap position indicator with calibration function
Pressure relief safety device, oil drain valve, oil level gauge
Galvanized pole-mount brackets and lifting lugs

Optional Extra Parts

Ratio correction transformer for multi-system voltage matching
External lightning surge arrester
Built-in temperature monitoring module

Core Technical Features

Precise Fine Regulation：32-step continuous adjustment within ±10% full range to maintain constant output voltage.
Wide Grid Adaptability：Covers nominal system voltage from 6.35kV to 34.5kV, matched with 60~200kV BIL insulation grades.
Intelligent Digital Control：Customizable voltage threshold and multiple communication protocols for remote monitoring.
Flexible Installation Hardware：Complete mounting kits for overhead poles, ground pads and distribution substations.
Universal Tap Winding Design：Built-in multi-tap windings cooperate with optional ratio transformer to fit various regional grid standards.

Technical Specifications

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

Product Competitive Advantages

High Long-Term Reliability：Arc-free tap switching eliminates internal sparking; fully sealed tank prevents oil aging and leakage, adapting to humid, coastal and tropical outdoor environments.
Full Customization Support：Adjustable rated current, voltage ratio and control logic to satisfy customized project specifications.
Low Operation & Maintenance Cost：Automatic tap change minimizes manual inspection frequency; 20-year standard design service life.

Application Scenarios

Urban & Rural Overhead Distribution Feeders：Compensate voltage drop on long overhead lines to stabilize residential power supply.
Industrial Parks & Manufacturing Zones：Maintain stable voltage for heavy machinery and precision sensitive equipment.
Distributed New Energy Grids：Suppress voltage fluctuation from photovoltaic and wind power generation.
Outdoor Medium-Voltage Distribution Substations：Improve whole-network voltage control accuracy and power quality.

Documentation Resource Library voltage regulator

Public.

Rockwill Electric Group Profile

Brochure

English

PDF

Restricted.

6kV to 34.5kV Single Phase Automatic Voltage Regulator Brochure

Catalogue

English

Consulting

Certifications voltage regulator

Negotiable

Pricing calculator

PDF

Rockwill Electric Group Profile

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Whole-life care management services for equipment procurement, use, maintenance, and after-sales, ensuring safe operation of electrical equipment, continuous control, and worry-free electricity consumption.

The equipment supplier has passed platform qualification certification and technical evaluation, ensuring compliance, professionalism, and reliability from the source.