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  • 66kV Three Phase Oil-Immersed Earthing Transformer
66kV Three Phase Oil-Immersed Earthing Transformer
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Model
JDS-350KVA-66KV
Basic info Product Detail Supplier
Basic info
Brand ROCKWILL
Model NO. 66kV Three Phase Oil-Immersed Earthing Transformer
Rated voltage 66kV
Phases Three-phase
Series JDS
Product Detail

Product Overview
Rockwill delivers reliable and high-performance earthing transformers designed for 66kV power systems. Our oil-immersed transformers are engineered to provide stable neutral grounding solutions while ensuring operational safety and system protection. Manufactured in compliance with international standards including IEC and GB, these transformers incorporate premium materials and rigorous quality control throughout production.

Basic Info.

Key Features

  • Voltage Class: 66kV system voltage (200 BIL)

  • Capacity Range: Standard units from 100kVA to 10,000kVA

  • Winding Configuration: Optimized zigzag (ZNyn) design

  • Cooling System: ONAN/OFAF cooling options

  • Insulation: Mineral oil or synthetic ester fluid

  • Construction:

    • Corrugated tank or radiator cooling

    • Hermetically sealed or conservator tank options

    • CRGO silicon steel core

    • Copper/aluminum windings

Technical Advantages

  • Enhanced Safety: Built-in Buchholz relay and pressure relief device

  • Low Impedance: Zero-sequence impedance <15&Omega; for effective fault current management

  • Durability: Corrosion-resistant paint system for outdoor installations

  • Efficiency: Reduced no-load losses through optimized core design

  • Flexibility: Off-circuit tap changer (&plusmn;5% in 2.5% steps)

Typical Applications

Utility Networks:

  • Neutral grounding for 66kV transmission systems

  • Arc suppression coil connections

  • Resistance grounding systems

 Industrial Plants:

  • Petrochemical facilities

  • Mining operations

  • Steel manufacturing plants

Renewable Energy:

  • Wind farm collector stations

  • Solar PV substations

  • Hydroelectric plants

Performance Specifications

  • Temperature Range: -30&deg;C to +40&deg;C ambient

  • Humidity: &le;95% monthly average

  • Altitude: Up to 2000m ASL

  • Sound Level: &le;75dB at 1m

  • Efficiency: &ge;99.2% at full load

Testing Protocol
All units undergo comprehensive testing including:

  • Zero sequence impedance measurement

  • Induced overvoltage test (260Hz)

  • Lightning impulse test (350kV)

  • Temperature rise test (65K max.)

  • Oil dielectric strength test (&ge;50kV)

Service Conditions

  • Suitable for indoor/outdoor installation

  • Wind resistant up to 35m/s

  • Non-explosive environments

  • Seismic capability: 0.3g horizontal acceleration

Know your supplier
ROCKWILL
Rockwill Electric Group Global Manufacturer of High voltage and medium-voltage power equipment and smart grid solutions. Headquartered in Wenzhou, China. Serving 100+ countries with quality, innovation, and trust. What We Offer: • HV-MV switchgear (VCB, SF₆ circuit breakers, RMU, GIS) • Distribution transformers and substations • Smart grid and monitoring systems • Solar, wind, EV charging, and energy storage solutions • EPC turnkey power projects Certified: ISO 9001 / ISO 14001 / ISO 45001
Main Categories
High Voltage Electrical Apparatus
Business Type
Design/Manufacture/Sales
Highest Annual Export (USD)
$150,000,000
Professional Experience
16 years
Workplace
108000m²m²
占位
占位
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