Request a Quote
Home > Ring Main Units (RMU) > Air-Insulated Ring Main Units > XGN66 Series Air-Insulated Ring Main Units

XGN66 Series Air-Insulated Ring Main Units

Air-insulated medium-voltage ring main units with fixed metal-enclosed construction, using vacuum circuit breakers for switching, protection and power distribution.

XGN66 Series provides a fixed-cabinet arrangement for feeder, bus-section, voltage measurement and metering configurations, supporting flexible project-specific power distribution requirements.

Key Ratings

  • Available Rated Voltages

    7.2 / 12 / 17.5 / 24 / 36 / 40.5 kV

  • Typical System Voltages

    6 / 6.6 / 10 / 11 / 13.8 / 15 / 20 / 22 / 30 / 33 / 34.5 / 35 kV

  • Rated Current

    630 / 1250 A

  • Rated Short-Time Withstand Current

    Up to 31.5 kA

  • Insulation Medium

    Air

Available Configurations

  • 01

    Vacuum Circuit Breaker Unit

    Incoming, outgoing and bus-section applications using vacuum circuit breakers for switching and protection.
  • 02

    Voltage Transformer Unit

    Voltage measurement, protection and monitoring according to project requirements.
  • 03

    Metering Panel

    Instrument transformer arrangements for project metering and measurement requirements.

Technical Specifications

Parameter 7.2 kV 12 kV 17.5 kV 24 kV 36 kV 40.5 kV
Typical System Voltages 6 / 6.6 kV 10 / 11 kV 13.8 / 15 kV 20 / 22 kV 30 / 33 kV 34.5 / 35 kV
Rated Frequency 50 / 60 Hz 50 / 60 Hz 50 / 60 Hz 50 / 60 Hz 50 / 60 Hz 50 / 60 Hz
Rated Current 630 / 1250 A 630 / 1250 A 630 / 1250 A 630 / 1250 A 630 / 1250 A 630 / 1250 A
Rated Short-Time Withstand Current Up to 31.5 kA Up to 31.5 kA Up to 31.5 kA Up to 31.5 kA Up to 31.5 kA Up to 31.5 kA
Rated Short-Circuit Breaking Current Up to 31.5 kA Up to 31.5 kA Up to 31.5 kA Up to 31.5 kA Up to 31.5 kA Up to 31.5 kA
Power-Frequency Withstand Voltage 20 / 23 kV 28 / 32 kV 38 / 45 kV 50 / 60 kV 70 / 80 kV 80 / 90 kV
Lightning Impulse Withstand Voltage 60 / 70 kV 75 / 85 kV 95 / 110 kV 125 / 145 kV 170 / 195 kV 185 / 215 kV
Insulation Medium Air
Installation Indoor
Applicable Standards IEC 62271-1 / IEC 62271-200

Note: The first value refers to phase-to-earth and between phases; the second value refers to across isolating distance.

Standards, Testing & Documentation

IEC-Oriented Design

IEC-Oriented Design

Designed with reference to applicable IEC requirements and project specifications.

Factory Routine Testing

Factory Routine Testing

Routine tests are carried out before shipment according to product configuration.

Project Documentation

Project Documentation

Technical datasheets, drawings and test records can be provided for project review.

Download Product Catalogue

Discuss Your XGN66 RMU Requirements

Share your system voltage, feeder arrangement, protection requirements and project specifications with our engineering team.

Request a Quote Talk to Our Engineers

COMPANY

PRODUCTS

INDUSTRIES

© 2026 TOONICE. All rights reserved.

Manufactured by Toonice Electric Power Technology Co., Ltd.

Exported by Wenzhou Naisite Electric Co., Ltd.

return-top

    Need a quote for your project?

    Share your requirements and our team will typically respond within 1 business day.

    Fields marked with an * are required.

    Full Name *

    Email Address *

    Company Name

    Country / Region *

    WhatsApp / Mobile

    Project Requirements / Message *

    WeChat

    WeChat QR Code

    Scan to Chat

    Open WeChat and scan to connect

    WhatsApp Email Us