Cable joint pilot at S Transportation Corp.
Pilot units are installed at 1 – 2 joints 1 km away and monitored remotely via Web monitoring.
Power Safety Platforms
Cable Joint Power Safety Platform
A disaster prevention system that remotely monitors fire detection sensor data from cable joints
01Why it is needed
At joints inside concrete troughs and Pascon troughs, temperature rises lead to fire disasters.
Power cable insulation begins to deteriorate at around 130 ℃ and ignites above 250 ℃. A contact sensor gives warning first, at around 80 ℃.
- Cable joint fire detection sensor data displayed on screen
- Up to 999 sensors registered, unique IDs with no radio interference
- Text message service is optional after monitoring is installed
- Protocol matching with existing solutions via the Signal Monitor's RS485
02System configuration
Temperature sensor80 ℃ alarm100 m
RepeaterMWSR2-9001 km
Signal MonitorMWSM-700RS485
PC monitoringSensor location · detection history
Text alertsManager's mobile phoneRanges are based on open field with no obstacles. Each added repeater extends the range by approx. 1 km.
Installation considerations
- Calculation and monitoring of joints based on a remote distance of 1 km
- Relay range is 1 km in open field; dust- and waterproof cases added for installation inside or outside tunnels
- Door opening/closing and displacement detection for Pascon troughs (door sensors), on-site emergency bells
- Extendable up to 5 – 10 km in open field with additional relays
- Dedicated program available — mapping configured separately, text notification possible
03Products · specifications
Fixed-temperature Fire Detection Sensor — SMA standard type
Model MWSF-100
| Size | W77 × D56 × H47.7 mm |
|---|---|
| Weight | 82 g |
| Frequency | 920.700 MHz (FSK) |
| Transmission range | approx. 100 m (open field) |
| Operating temperature | approx. 75 – 85 ℃ or above |
| Power | Self-powered (no battery) |
| Dust · water protection | IP57 |
Repeater
Model MWSR2-900
| Size | W115 × D115 × H30 mm |
|---|---|
| Weight | 167 g |
| Frequency | 920.7 / 447.9 MHz (FSK) |
| Antenna | External antenna × 2 |
| Tx/Rx range | approx. 1 km (open field) |
| Range extension | +approx. 1 km (open field) |
| Display | FND 3-digit, LED (Rx · Tx · Power) |
| Power | DC 12 V 1 A adapter |
Signal Monitor
Model MWSM-700
| Size | W258 × D107 × H34 mm |
|---|---|
| Weight | 497 g |
| Frequency | 920.7 / 447.9 MHz (FSK) |
| Antenna | External antenna × 2 |
| Reception range | approx. 1 km (open field) |
| ID registration | max. 999 |
| Signal storage | Up to 10 overlapping signals |
| Display | FND 5-digit LED |
| External terminals | RS-485, beacon light, speaker, power |
| Power | DC 12 V 1 A adapter |
PC monitoring program
Model —
| Operating environment | Runs on an on-site PC |
|---|---|
| Map | MAP layout (sensor location check) |
| Sensor display | Icon for each self-powered sensor |
| History management | Detection history saved |
| Protocol | RS485 |
| Port | RS485 to USB cable |
04Case studies
Installation sites
- S Transportation Corp. (pilot in progress)
Field installation photos4
05Benefits
01Benefits
Early detection of temperature rises at joints inside troughs where wiring is difficult
02Benefits
Remote monitoring of locations 1 km or more away
03Benefits
Door · displacement detection and emergency bells configured together
CONTACT MPIA
Cable Joint Power Safety Platform
A disaster prevention system that remotely monitors fire detection sensor data from cable joints