Single Phase Step Voltage Regulator for Substation
The Single Phase Step Voltage Regulator for Substation is a precision-engineered, automatic on-load tap-changing device designed to deliver stable voltage output in medium-voltage substation environments. Built with high-quality copper windings, premium grain-oriented silicon steel core, and a reliable motorized on-load tap changer, it provides fast and accurate voltage correction with minimal waveform distortion. The advanced digital AVR controller offers real-time monitoring, programmable settings, and multiple communication protocols for seamless SCADA integration. This regulator features robust protection systems against over-voltage, under-voltage, overload, short-circuit, and lightning surges. Its compact substation-optimized design, excellent overload capacity, and long-term reliability make it the ideal solution for maintaining consistent voltage levels despite load variations or grid fluctuations. Fully compliant with IEC 60076-21 and ANSI C57.15 standards, it ensures high efficiency, low losses, and trouble-free operation in demanding substation conditions.
- Primary Voltage Ratings 6 kV / 10 kV / 11 kV / 13.8 kV / 22 kV
- Secondary Voltage Ratings --
- H.V. Tap Range --
- Type Voltage Regulator
- BIL 11kV - 200kV
- Standards IEC 60076, IEC 60137, ASTM D202
- Application residential, commercial, industrial voltage stabilization
- Power Rating --
- Certificate UL, CESI, IEEE
- Cooling Method ONAN
- Opeartion --
Technical Specifications
Customization Optional
Packing and Shipping
Manufacturer Test
Routine Testing
Application
Technical Specifications
Single Phase Step Voltage Regulator for Substation
Single Phase Step Voltage Regulator for Substation Parameter
| Parameter | Specification |
| Rated Capacity | 50 kVA – 500 kVA |
| Primary Voltage | 6 kV / 10 kV / 11 kV / 13.8 kV / 22 kV |
| Regulation Range | ±10% to ±25% (customizable) |
| Number of Steps | 9 ~ 32 steps |
| Step Voltage | 0.625% ~ 1.5% per step |
| Cooling Method | ONAN |
| Controller | Microprocessor with RS485 / 4G / IEC61850 |
| Ambient Temperature | -40°C to +55°C |
Customization Optional
Single Phase Step Voltage Regulator for Substation
Our Single Phase Step Voltage Regulator for Substation offers wide-ranging customization to meet specific substation requirements and grid conditions. Clients can choose rated capacities from 50kVA to 500kVA, primary voltages from 6kV to 36kV, and regulation ranges up to ±30%. The number of tap steps, step size, and regulation speed can be tailored for fast or gradual correction depending on network sensitivity. Advanced control features include support for multiple protocols (IEC 61850, DNP3, Modbus), remote monitoring via 4G/Wi-Fi, event logging, and programmable time delays. Enclosure options include indoor IP20, outdoor IP54 weatherproof, or compact designs optimized for tight substation spaces with enhanced seismic resistance.
For special applications, we provide ultra-wide input range models for unstable grids, high-overload variants capable of 200% loading for extended periods, harmonic suppression filters, surge arrester integration, and automatic bypass switches for maintenance without interruption. Additional customizations include low-noise designs for urban substations, extreme temperature insulation systems, stainless steel tanks for coastal environments, and integration with existing SCADA or smart grid platforms. These flexible options allow utilities and engineers to obtain a perfectly matched single-phase step voltage regulator that maximizes power quality and system stability.
Packing and Shipping
Single Phase Step Voltage Regulator for Substation
The Single Phase Step Voltage Regulator for Substation is packaged with extreme care to protect its precision components during long-distance transportation. The regulator is firmly mounted on a heavy-duty reinforced wooden pallet with anti-vibration rubber mounts and multiple steel strapping bands. All high-voltage bushings, control cabinet, and radiators are individually protected with custom foam inserts and wooden bracing. The entire unit is wrapped in multi-layer waterproof and anti-static film with sufficient desiccant to control internal humidity. A robust, ISPM 15 fumigated wooden crate or steel frame enclosure provides full protection, with shock and tilt indicators attached for complete transit monitoring.
We offer flexible and secure shipping solutions tailored to customer project timelines. Sea freight using 20ft or 40ft containers with professional lashing and blocking ensures safe and cost-effective international delivery, usually taking 25–50 days. For urgent requirements, air freight services are available with delivery in 5–12 days. Domestic and regional shipments are handled by specialized heavy transport vehicles equipped with hydraulic cranes and GPS tracking.
Comprehensive export documentation is prepared in advance, including commercial invoices, detailed packing lists, certificates of origin, factory test reports, and installation guidelines to ensure smooth customs clearance. We follow environmentally responsible practices by using recyclable materials and optimizing load configurations to reduce carbon emissions. Customers receive a dedicated tracking portal with real-time updates and proactive communication from our logistics team.
Upon arrival, we provide optional professional supervision for unloading, oil level inspection, and initial setup guidance. For large substation projects, we support consolidated multi-unit shipments and scheduled deliveries to minimize on-site storage requirements and streamline installation schedules. This meticulous packing and shipping process guarantees that every step voltage regulator arrives in optimal condition, ready for immediate substation integration.
We offer flexible and secure shipping solutions tailored to customer project timelines. Sea freight using 20ft or 40ft containers with professional lashing and blocking ensures safe and cost-effective international delivery, usually taking 25–50 days. For urgent requirements, air freight services are available with delivery in 5–12 days. Domestic and regional shipments are handled by specialized heavy transport vehicles equipped with hydraulic cranes and GPS tracking.
Comprehensive export documentation is prepared in advance, including commercial invoices, detailed packing lists, certificates of origin, factory test reports, and installation guidelines to ensure smooth customs clearance. We follow environmentally responsible practices by using recyclable materials and optimizing load configurations to reduce carbon emissions. Customers receive a dedicated tracking portal with real-time updates and proactive communication from our logistics team.
Upon arrival, we provide optional professional supervision for unloading, oil level inspection, and initial setup guidance. For large substation projects, we support consolidated multi-unit shipments and scheduled deliveries to minimize on-site storage requirements and streamline installation schedules. This meticulous packing and shipping process guarantees that every step voltage regulator arrives in optimal condition, ready for immediate substation integration.
32
32 years of industry experience
Manufacturer Test
Single Phase Step Voltage Regulator for Substation
Progress Test
Manufacturing progress testing for the Single Phase Step Voltage Regulator begins with core material validation using Epstein frame testing to verify low-loss characteristics of the silicon steel. Copper winding resistance, insulation resistance, and turn-to-turn withstand voltage tests are conducted before assembly. The on-load tap changer mechanism undergoes rigorous mechanical endurance cycling (minimum 15,000 operations) to ensure smooth and reliable switching. Tank fabrication and welding quality are inspected using helium leak detection and ultrasonic testing. Initial control board calibration verifies voltage sensing accuracy, protection settings, and communication module functionality. These early-stage tests, supported by digital traceability records, establish a solid foundation for precision voltage regulation performance. Oil processing and vacuum filling are strictly monitored for moisture content and dielectric strength. The automatic control logic is simulated under varying input voltages and load conditions to confirm regulation accuracy and response time.
Design Tests
All transformer will be test after finished the production, test items as below:
♦ Insulation Power Factor
♦ Ratio, Polarity, and Phase Relation
♦ Winding Resistance
♦ Impulse Tests
♦ On load Loss Test
♦ No Load Loss Test
♦ Transformer Turns Ratio/TTR (All Tap Voltages)
♦ Impedance Voltage & Load Loss (Rated Voltage)
♦ Polarity, 1-Ph / Phase Relation, 3-Ph (Rated Voltage)
♦ Excitation & No-Load Loss (Rated Voltage)
♦ Applied Voltage
♦ Induced Voltage
♦ Lightning Impulse
♦ Insulation Resistance (Rated Voltage)
♦ Temperature Rise
♦ Dielectric Withstand (Hipot)
Factory Acceptance Test
Advanced FAT includes extended heat-run testing at 100% and 150% rated load to verify temperature rise and cooling effectiveness. On-load tap changer endurance cycling under load confirms long-term mechanical and electrical reliability. Harmonic distortion, power factor, and regulation response time are measured under different load types. Noise level measurement, sealing integrity, and auxiliary device functionality (gauges, relays, heaters) are verified according to standards. Final comprehensive inspection covers paint quality, nameplate information, accessories, and overall workmanship. Complete test reports with calibration certificates, oscillographic records, and customer witness signatures (if required) are provided, fully certifying the regulator’s high precision and readiness for substation deployment. No-load loss and excitation current measurements confirm core efficiency. Full-range automatic regulation tests verify output voltage stability and step precision under zero to full load conditions.
Routine Test - Insulation Power Factor
Purpose of Testing
The purpose of testing the insulation power factor is to evaluate the dielectric loss of the insulation system in electrical equipment, and to determine whether issues such as moisture ingress, aging, or contamination are present. A high power factor value usually indicates insulation deterioration.
Testing Equipment
Insulation power factor tester (e.g., brands like Doble, Megger) Voltage source (typically 1 kV, 2.5 kV, or 10 kV or as the customer request standard) Temperature and humidity meter (for recording environmental conditions)
Pre-Test Preparation
De-energize tap changer the equipment and ensure it has been properly grounded and discharged. Make sure the bushings and terminal connections to prevent surface contamination from affecting test results. Perform the test under suitable environmental conditions: relative humidity below 75% and no rain (recommended temperature: 20–30°C). Calibrate and inspect the test instruments to ensure they are in good working condition.
Test Progress
Connect the Test Instrument: Connect the test equipment to the bushings or terminals of the equipment under test and ensure proper grounding. Apply Test Voltage: Select the appropriate test voltage according to the rated voltage of the equipment (e.g., 25 kV for high-voltage windings or as the request of the pad mounted transformer).
Measure and Record
Start the test and record the following parameters: Capacitive current (IC) Power current (IW) Power factor (PF) or dissipation factor (Tanδ) Capacitance Ambient temperature and humidity at the time of testing
Temperature Correction
Correct the measured power factor to the reference temperature (typically 20°C) for accurate evaluation.
Repeat Testing (if necessary)
Measure different windings (high-voltage, medium-voltage, low-voltage) and bushings separately for comparative analysis.
Evaluation Criteria (Reference)
Insulation power factor ≤ 0.5% (Excellent) 0.5% < Power factor ≤ 1% (Good) 1% (Further inspection or corrective action required) Test standard:IEEE C57.12.00 & IEEE C57.12.90 (Liquid-Immersed)
*These comprehensive tests ensure that each transformer meets performance standards and operates
reliably under various conditions.
Application
Ideal for medium-voltage distribution substations in urban and suburban areas, automatically maintaining stable voltage for residential feeders despite daily load fluctuations.
Technical Advantages
● 30+ years of manufacturing experience
● ISO and UL certified production
● Customized cable and transformer solutions
Product Packaging
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What is a Transformer?A transformer is an electrical device used to change the voltage of alternating current (AC). It works on the principle of electromagnetic induction, converting high-voltage current into low-voltage current or low-voltage current into high-voltage current. Transformers are widely used in power transmission, distribution systems, and various electronic devices.
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What are the main uses of a transformer?The main use of a transformer is voltage conversion. Transformers are used in power transmission systems to help transfer electricity from power plants to consumers. In addition, transformers are also used in electronic devices such as chargers, televisions, power adapters, etc., to adjust the voltage to meet the requirements of different devices.
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Do you have UL listed?Yes, our transformer has UL listed. We have exported to America many pad mounted transformer,substation transformer and HV.
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