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Smart Manufacturing
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Project
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10kV Micro Tunnel Substation
Hengxuan Electric is committed to providing customers with research and development, production, sales, and installation (repair, testing) of complete electrical equipment and comprehensive supporting services.
Keywords: High and Low Voltage Complete Sets | Box-type Substation | Power Transformer
- Description
- Technical Specifications
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Specifically designed for narrow spaces such as tunnels and underground utility corridors, using non-standard slender structures and modular integration technology, breaking through the limitations of traditional box transformer layouts to adapt to the limited installation space inside tunnels. The product achieves high reliability, low maintenance costs, and long service life through three-phase balance optimization design, fully sealed gas-filled high-voltage ring main unit, and innovative low-voltage distribution modules, meeting the stringent environmental requirements of tunnel projects.
Product Features:
Customized slender structure, improved space adaptability
Compact size: Overall dimensions optimized to L*W*H=4800mm*590mm*980mm (customizable on demand), width only 60% of traditional pin-type transformers, perfectly fitting tunnel sidewall installation.
Weight control: Total weight ≤4000kg (traditional box transformers about 5500kg), reducing load requirements on tunnel foundations.
Passability optimization: Supports segmented transportation + on-site rapid assembly, adapting to tunnel construction passage restrictions (minimum turning radius <8m).
High-voltage ring main unit: Fully sealed gas-filled design
Insulating medium: Uses SF6/N2 mixed gas (pressure 0.04MPa), insulation performance improved by 30%, power frequency withstand voltage 42kV for 1 minute, lightning impulse withstand voltage 75kV.
Protection level: Gas box protection level IP67, resistant to tunnel humidity = 95% RH, dust concentration >5mg/m3 environment.
Maintenance-free design: Gas box annual leakage rate <0.1%, no gas replenishment needed during lifecycle, reducing operation and maintenance costs by 50%.
Low-voltage distribution system: Modular integration technology
No traditional low-voltage cabinet design: Uses plug-in busway + intelligent circuit breaker modules, space occupation reduced by 40%, installation efficiency increased by 70% (installation time ≤4 hours).
Protection and heat dissipation: Independent air duct design for low-voltage compartment, protection level IP54, temperature rise control <55K (traditional design about 65K).
Flexible expansion: Supports modular expansion for current levels from 400A to 2500A, adapting to segmented power supply needs of tunnels.
Three-phase transformer customized design
Energy efficiency level: Complies with GB20052-2020 Level 1 energy efficiency, no-load loss ≤800W, load loss <6500W (15% lower than national standard limits).
Harmonic resistance: THD (Total Harmonic Distortion) ≤3%, suitable for nonlinear loads such as frequency converters and LED lighting inside tunnels.
Overload capacity: Allows short-term 150% load for 2 hours, ensuring power supply continuity under emergency conditions.
Intelligent monitoring system
Multi-parameter monitoring: Real-time collection of temperature (±1℃ accuracy), humidity, gas pressure, partial discharge data, supports RS485/4G/fiber optic communication.
Remote operation and maintenance: Connected to tunnel integrated management platform, fault location response time <30 seconds, supports remote switching via APP/PC.
Early warning mechanism: Built-in AI algorithm, predictive maintenance accuracy 95%, reducing unplanned downtime risks.
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Project Unit Parameter Industry Comparative Advantage Rated Capacity kVA Below 500 Covers Mainstream Tunnel Power Demand Overall Dimensions mm 6000×1200×2200mm Width Reduced by 40% Total Weight kg ≤4000kg Lightweight Design Protection Level High Voltage Compartment IP67 / Low Voltage Compartment IP54 Exceeds National Standard IP44 Requirement Temperature Rise Control K ≤55K (Full Load) Cooling Efficiency Increased by 20% Annual Failure Rate <0.5 times/year Industry Average 1.2 times/year
Application Industries
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