Power Cable Fire Detection & Temperature Monitoring

DTS full-line temperature monitoring + DAS underground gallery intrusion warning — two defenses on one fiber base.

Challenges

Four pain points of urban cable safety

Joints & manholes overheat

Cable joints, terminations and manholes are overheating hotspots — scattered and numerous, hard to cover with point sensors, and fires brew silently.

Fire = loss already

Overload and aging cause a gradual temperature rise; smoke detectors only alarm after ignition, missing the best response window.

Underground gallery intrusion

Underground power galleries face illegal intrusion and third-party construction threats — any cable damage causes wide-area blackouts.

Manual patrol is inefficient

Manholes and galleries are scattered and harsh; patrol cycles are long with many blind spots, and continuous watch is impossible.

Solution Architecture

Architecture: temperature + intrusion dual defense

Two sensing layers share one fiber base — fire prevention and intrusion warning in a single platform.

Defense 1 · Temperature

DTS full-line fire early warning

DTS is laid continuously along urban trunk lines, distribution channels, manholes and joints, delivering ±0.5 °C accuracy, 0.1 °C resolution, 0.8 m spatial resolution and 50 °C/min response sensitivity — one temperature point per meter, alarming and localizing temperature rise before a fire starts.

Defense 2 · Intrusion

DAS gallery intrusion warning

DAS monitors vibration and acoustic signatures along underground power galleries in real time, identifying illegal intrusion and third-party construction with meter-level localization — sharing one host and fiber base with cable temperature monitoring.

Proven Strength

Core capability metrics

±0.5℃

DTS accuracy (industry avg ±1 ℃)

0.8m

Spatial resolution (industry avg 1 m)

50℃/min

Response sensitivity (industry avg 30–40)

30km

Single-mode range (industry avg 25 km)

Why DTS beats point temperature sensing

Distributed fiber sensing covers the whole line continuously at 0.8 m resolution — no blind zones, no power, no networking, immune to EMI — with far lower lifecycle cost than a point-sensor scheme. View the DTS product

FAQ

Frequently Asked Questions

Distributed fiber temperature sensing beats conventional heat-sensing cable in monitoring density, installation cost, maintenance cost and interference immunity. DTS delivers one measurement point per meter at 0.8 m resolution, gap-free, maintenance-free, ±0.5 °C accuracy.

Mostly not. The sensing cable can be laid along cable trays without affecting cable operation; the exact process is confirmed after a site survey.

DTS monitors the gradual temperature rise, not the fire itself: it alarms when the joint or core temperature exceeds a threshold or the rise rate is abnormal (50 °C/min response), with 0.8 m localization — typically days to weeks earlier than smoke detectors.

No. DAS uses a spare core of the existing communication cable, physically isolated from live traffic; sensing-communication fusion even allows one core for both.

Get a power cable safety solution & quote

Tell us your cable corridors and manholes — we'll design the DTS + DAS architecture.

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