Tunnel Solutions
Smart tunnels for a smarter, safer transportation future
Tunnels are critical national assets that demand uninterrupted power, real-time environmental monitoring and fail-safe emergency response. AEPL delivers complete turnkey Electrical, Instrumentation and SCADA packages for road, highway, railway and metro tunnels in compliance with IRC and NFPA 502 guidelines.
Proven on landmark projects such as the 2.5 Km twin-tube Churhat Bypass Tunnel (Rewa–Sidhi on NH 75E), our integrated architecture brings lighting, jet-fan ventilation, linear heat detection, traffic signalling, SOS communication and dual-grid HT/LT power distribution onto a single redundant SCADA command console.
Four pillars of tunnel safety and control
Control management
CIE curve photometer-based adaptive portal lighting, jet-fan ventilation, CO / NO2 / visibility (K-value) control and drainage pumping.
Electrical distribution
33kV/11kV HT substations, VCB panels, dry-type transformers, PCC/MCC, AMF auto-changeover and dual-grid + DG + UPS emergency power.
Safety system integration
Linear Heat Detection (LHD), fire hydrant booster automation, IP CCTV with Automatic Incident Detection (AID), SOS call boxes and cross-passage evacuation.
User information & traffic
Variable Message Signs (VMS), lane control signals, traffic radar counters and emergency voice radio / PA break-in systems.
From portal survey to final commissioning
- 1
Site survey
Detailed assessment of tunnel geometry, portal ambient lux profiles, electromechanical loads and safety zones.
- 2
Solution design
Redundant HT/LT single-line diagrams, CIE lighting curves, ventilation CFD logic and fiber-optic ring topology.
- 3
Proposal & engineering
Inspector-ready AutoCAD layouts, cable schedules, PLC/SCADA architecture and statutory compliance submittals.
- 4
In-house manufacturing & FAT
Fabrication of HT/LT, VFD, PLC and RIO panels in AEPL's 2,00,000 sq.ft+ facility with 100% loop simulation.
- 5
Installation & handover
Fire-survival cabling, field sensor calibration, integrated emergency drill testing and operator training.
Automated response when seconds matter
Our hot-standby PLC and SCADA platform continuously samples air quality, visibility and thermal sensors across every tunnel zone to protect commuters and assets.
- Photometer-driven threshold, transition and interior zone dimming prevents the daytime 'black hole' effect
- Automatic jet-fan speed and reversible thrust control based on real-time CO, NO2, visibility and anemometer inputs
- Fire mode interlocks instantly trigger directional smoke extraction, switch lane signals to red and broadcast PA evacuation alerts
- Dual-redundant fiber-optic Ethernet ring and centralized online UPS ensure zero blind spots during grid failure
Electrical & automation deliverables
End-to-end hardware and software supplied, installed and commissioned by AEPL.
| Subsystem | AEPL Scope of Supply |
|---|---|
| HT & LT Power | 11kV / 33kV VCB panels, cast-resin dry transformers, PCC, MCC, APFC, AMF, PDB, LDB and online UPS |
| Cabling & Earthing | HT/LT XLPE cables, fire-survival (FS) instrumentation cables, perforated/ladder cable trays and chemical earthing |
| Tunnel Lighting | High-efficacy highway tunnel LED luminaires, emergency luminaires and portal luminance photometers |
| Ventilation & Pumping | Jet fans with VFD / soft-starter panels, CO / NO2 / visibility sensors, anemometers and sump pump automation |
| SCADA & Telemetry | Redundant SCADA servers, operator workstation desks, video wall, hot-standby PLCs and 15+ Remote I/O (RIO) panels |
| Traffic & Life Safety | Linear Heat Detection (LHD), CCTV + AID cameras, Variable Message Signs (VMS), lane signals, SOS booths and PA system |
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