• Product
  • Suppliers
  • Manufacturers
  • Solutions
  • Free tools
  • Knowledges
  • Experts
  • Communities
Search


MENU

Three-Phase Dry-Type Excitation Generator Transformer 6.3kV 7.2kV 10.5kV

Wenzhou Rockwill Electric Co., Ltd.
17yrs 700++ staff 108000m²+m² US$150000000+ China
  • Three-Phase Dry-Type Excitation Generator Transformer 6.3kV 7.2kV 10.5kV
  • Three-Phase Dry-Type Excitation Generator Transformer 6.3kV 7.2kV 10.5kV

Key attributes

Brand ROCKWILL
Model NO. Three-Phase Dry-Type Excitation Generator Transformer 6.3kV 7.2kV 10.5kV
Rated voltage 6.3kV
Rated normal current 630A
Rated frequency 50/60Hz
Series ZLC

Product descriptions from the supplier

Description

 Product Introduction

The excitation transformer is a device specially designed to provide three-phase AC excitation power for the generator excitation system. The excitation system converts three-phase power into DC power for the generator rotor via silicon-controlled rectifiers (SCRs), forming the generator excitation magnetic field. By adjusting the firing angle of the SCRs in the excitation system, the generator terminal voltage and reactive power can be regulated.
It is usually connected to the generator outlet. Since the voltage at the generator outlet is relatively high while the rated voltage of the excitation system is low, an excitation transformer is required to step down the voltage.

Product Features

  • The load of the excitation transformer is an inductive load after rectification, and the secondary current contains a large number of high-order harmonic components.Meanwhile, overvoltage impacts also exist. Therefore, the manufacturing requirements for generator excitation transformers are more stringent.
  • By reducing magnetic flux density and current density, strengthening inter-turn insulation, adopting advanced casting transformer partial discharge control technology and internal stress control process, the internal insulation of the excitation transformer is optimized, thus ensuring the key performance of the transformer.
  • A shielding grounding screen installed between the high-voltage and low-voltage windings effectively shields the parasitic capacitance between windings and suppresses the influence of harmonics on the excitation system.
  • The product features strong overload capacity, low loss, low noise, maintenance-free operation and energy saving. It is moisture-proof, mildew-proof, salt-spray resistant, with excellent heat dissipation, and adapts to high-altitude, high-temperature and harsh environments.

 Product Performance Parameters

Operation Mode Continuous operation
Voltage Regulation Range ±2×2.5%
Phase Number 3-phase
Connection Group Y,d11
Polarity Subtractive polarity
Insulation Class Class H
Cooling Method AN/AF
Voltage Regulation Mode Off-circuit voltage regulation
Service Conditions
a. Altitude: Not exceeding 1000 m
b. Ambient temperature:
  • Ambient air temperature: -30 ℃ ～ +40 ℃
  • Daily average temperature: +30 ℃
  • Annual average temperature: +20 ℃

c. Atmospheric relative humidity:

  • Daily average: ≤ 95%
  • Monthly average: ≤ 90%

d. Equipped with a sound grounding grid

e. Power supply frequency: 50 /60Hz

Know your supplier
ROCKWILL
Online store
On-time delivery rate
Response time
100.0%
≤4h
Company overview
Workplace: 108000m²m² Total staff: 700+ Highest Annual Export(usD): 150000000
Workplace: 108000m²m²
Total staff: 700+
Highest Annual Export(usD): 150000000
Services
Business Type: Design/Manufacture/Sales
Main Categories: High Voltage Electrical Apparatus/Electric transformer
Whole life care manager
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.
Negotiable
Pricing calculator
Model
Warranty by
Whole life care manager
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.

Related Products

More

Related Knowledges

More
  • Main Transformer Accidents and Light Gas Operation Issues
    Main Transformer Accidents and Light Gas Operation Issues
    1. Accident Record (March 19, 2019)At 16:13 on March 19, 2019, the monitoring background reported a light gas action of No. 3 main transformer. In accordance with the Code for Operation of Power Transformers (DL/T572-2010), operation and maintenance (O&M) personnel inspected the on-site condition of No. 3 main transformer.On-site confirmation: The WBH non-electrical protection panel of No. 3 main transformer reported a Phase B light gas action of the transformer body, and the reset was ineff
    Leon
    02/05/2026
  • Faults and Handling of Single-phase Grounding in 10kV Distribution Lines
    Faults and Handling of Single-phase Grounding in 10kV Distribution Lines
    Characteristics and Detection Devices for Single-Phase Ground Faults1. Characteristics of Single-Phase Ground FaultsCentral Alarm Signals:The warning bell rings, and the indicator lamp labeled “Ground Fault on [X] kV Bus Section [Y]” illuminates. In systems with a Petersen coil (arc suppression coil) grounding the neutral point, the “Petersen Coil Operated” indicator also lights up.Insulation Monitoring Voltmeter Indications:The voltage of the faulted phase decreases (in
    Rockwill
    01/30/2026
  • Neutral point grounding operation mode for 110kV～220kV power grid transformers
    Neutral point grounding operation mode for 110kV～220kV power grid transformers
    The arrangement of neutral point grounding operation modes for 110kV～220kV power grid transformers shall meet the insulation withstand requirements of transformer neutral points, and shall also strive to keep the zero-sequence impedance of substations basically unchanged, while ensuring that the zero-sequence comprehensive impedance at any short-circuit point in the system does not exceed three times the positive-sequence comprehensive impedance.For 220kV and 110kV transformers in new constructi
    Vziman
    01/29/2026
  • Why Do Substations Use Stones, Gravel, Pebbles, and Crushed Rock?
    Why Do Substations Use Stones, Gravel, Pebbles, and Crushed Rock?
    Why Do Substations Use Stones, Gravel, Pebbles, and Crushed Rock?In substations, equipment such as power and distribution transformers, transmission lines, voltage transformers, current transformers, and disconnect switches all require grounding. Beyond grounding, we will now explore in depth why gravel and crushed stone are commonly used in substations. Though they appear ordinary, these stones play a critical safety and functional role.In substation grounding design—especially when multiple gr
    Echo
    01/29/2026
  • Why Must a Transformer Core Be Grounded at Only One Point? Isn't Multi-Point Grounding More Reliable?
    Why Must a Transformer Core Be Grounded at Only One Point? Isn't Multi-Point Grounding More Reliable?
    Why Does the Transformer Core Need to Be Grounded?During operation, the transformer core, along with the metal structures, parts, and components that fix the core and windings, are all situated in a strong electric field. Under the influence of this electric field, they acquire a relatively high potential with respect to ground. If the core is not grounded, a potential difference will exist between the core and the grounded clamping structures and tank, which may lead to intermittent discharge.I
    Vziman
    01/29/2026
  • Understanding Transformer Neutral Grounding
    Understanding Transformer Neutral Grounding
    I. What is a Neutral Point?In transformers and generators, the neutral point is a specific point in the winding where the absolute voltage between this point and each external terminal is equal. In the diagram below, pointOrepresents the neutral point.II. Why Does the Neutral Point Need Grounding?The electrical connection method between the neutral point and earth in a three-phase AC power system is called theneutral grounding method. This grounding method directly affects:The safety, reliabilit
    Vziman
    01/29/2026

Related Solutions

More
  • Dry-Type Transformer Solution: Dedicated System for Demanding Industrial Environments (Anti-Corrosion / High Overload Dry-Type System)
    Dry-Type Transformer Solution: Dedicated System for Demanding Industrial Environments (Anti-Corrosion / High Overload Dry-Type System)
    Dry-Type Transformer Solution: Dedicated System for Demanding Industrial Environments (Anti-Corrosion / High Overload Dry-Type System)1. Challenges Addressed Industries: Chemical, Metallurgy, Shipbuilding, Coastal Energy Facilities, etc. Environmental Threats: Extreme High Humidity: Constant or long-term ambient relative humidity > 90%. Corrosive Attack: Presence of highly corrosive media including salt spray, acidic/alkaline gases (pH range 2-12), chemical vapors. Operational Stress: Pro
    Rockwill
    07/04/2025
  • Digital Twin-Driven Smart Manufacturing: Next-Gen Intelligent Solutions for Dry-Type Transformers
    Digital Twin-Driven Smart Manufacturing: Next-Gen Intelligent Solutions for Dry-Type Transformers
    Digital Twin-Driven Smart Manufacturing: Next-Gen Intelligent Solutions for Dry-Type TransformersAmidst the dual waves of energy transition and smart manufacturing, Dry-Type Transformers are rapidly evolving towards digitization and intelligence. Our proposed "Digital Twin Dry-Transformer Ecosystem" integrates cutting-edge technologies to establish an intelligent, closed-loop management system covering the entire equipment lifecycle, propelling the industry into a new era of future smart manufac
    Rockwill
    07/04/2025
  • Technical Solution: RW Series Vacuum Pressure Impregnation (VPI) Dry-Type Transformers
    Technical Solution: RW Series Vacuum Pressure Impregnation (VPI) Dry-Type Transformers
    Technical Solution: RW Series Vacuum Pressure Impregnation (VPI) Dry-Type TransformersI. Core Technological Innovations Defect-Free Insulation System Utilizes Vacuum Pressure Impregnation (VPI) process to cast high-density epoxy resin, achieving void-free solidified insulation. Partial discharge levels stably controlled at <10 pC (IEC 60076-11 standard). Insulation thermal class reaches Class H (180&deg;C), with insulation performance degradation rate &le;5% throughout the lifespa
    Rockwill
    07/04/2025
Haven't found the right supplier yet? Let matching verified suppliers find you. Get Quotation Now
Haven't found the right supplier yet? Let matching verified suppliers find you.
Get Quotation Now
Send inquiry
+86
Click to upload file
Download
Get the IEE Business Application
Use the IEE-Business app to find equipment, obtain solutions, connect with experts, and participate in industry collaboration anytime, anywhere—fully supporting the development of your power projects and business.
Google Play App Store HUAWEI XIAOMI VIVO OPPO Palm Store
DownloadQr