Pre-fabricated Metal-Enclosed Ring Main Unit
ZTHWX-12
The 12kV pre-fabricated metal-enclosed ring main unit is a high-voltage device designed for power distribution systems, specifically tailored for 12kV electrical systems. It is used for the distribution, control, and protection of electrical energy. Its metal-enclosed structure and pre-fabricated design ensure high reliability, safety, and convenience, making it widely used in urban power grids, industrial power supply, and commercial buildings.
Main functions and characteristics

1) Ring Network Power Supply: Achieve flexible distribution of electrical energy through a ring network structure, ensuring reliable power supply.

2) Multiple Circuit Outputs: Support multiple output circuits to meet the needs of different loads.

3) Switch Operation: Equipped with load switches and circuit breakers for connecting, disconnecting, and switching circuits.

4) Remote Control: Support remote operation for convenient automated management.

5) Overload and Short-Circuit Protection: Prevent equipment damage from overload and short circuits through circuit breakers or fuses.

6) Current and Voltage Monitoring: Real-time monitoring of current, voltage, and other parameters, with integrated energy metering functions for energy management.

7) Metal Enclosure: Provides mechanical protection and electromagnetic shielding with a metal casing.

8) High Protection Rating: Suitable for various environmental conditions, such as humidity and dust, and can operate stably over a wide temperature range.

9) Easy Maintenance: Designed for easy daily maintenance and troubleshooting, with high-quality materials and craftsmanship to ensure long-term reliable operation.

Technical parameter
  • 1. Rated Voltage (kV)
    12
  • 2. Rated Current (A)
    630, 1250, etc. (Customizable according to requirements)
  • 3. 1-minute Power Frequency Withstand Voltage (Phase-to-Phase and Phase-to-Ground) (kV)
    42
  • 4. 1-minute Power Frequency Withstand Voltage (Isolating Distance) (kV)
    48
  • 5. Lightning Impulse Withstand Voltage (Phase-to-Phase and Phase-to-Ground) (kV)
    75
  • 6. Rated Short-Circuit Breaking Current (kA)
    20
  • 7. Rated Short-Circuit Making Current (kA)
    50
  • 8. Rated Peak Withstand Current (kA)
    50
  • 9. 4S Short-Time Withstand Current (kA)
    20
  • 10. Protection Class
    IP44
  • 11. Operation Method
    Manual or Electric (Support Remote Control)
  • 12. Enclosure Material
    High-quality galvanized steel or stainless steel
  • 13. Ambient Temperature
    -40℃ - +70℃
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