2021.10Busan · Ulsan Headquarters
Real-time remote monitoring of substation GIS gas valve open/close status — only a self-powered sensor unit added to existing valves, displayed on a DC receiver LED panel
Power Safety Platforms
GIS Substation Power Safety Platform
A system that mounts self-powered sensors on gas valves to show GIS valve open/close status on an LCD panel and sends the status to SCADA to prevent mis-operation
01Why it is needed
If gas is mistakenly recovered from a gas valve of an energized GIS (gas-insulated switchgear), insulation breaks down and a wide-area blackout occurs.
GIS gas valve mis-operation accidents occur twice a year on average, with average recovery costs of approx. KRW 200 million. In December 2023, mistaken gas recovery from a live section caused a large-scale blackout in the Ulsan area.
The causes are the absence of remote valve monitoring and the difficulty of checking open / closed status by eye.
- Real-time OPEN / CLOSE information of GIS valves displayed on an LCD panel
- Live-equipment door opening alarms and fire detection alarms during outage work on PLC panels
- Up to 999 sensors registered, unique IDs with no radio interference
- Real-time monitoring of wireless sensor status in SCADA via a dedicated monitoring panel (IED, IEC 61850)
02System configuration
GIS valve sensorOpen / closed
Door sensorPanel opening
Temperature sensor80 ℃ alarm100 m
RepeaterMWSR2-9001 km
Dedicated monitoring panel(built-in LCD panel / Signal Monitor)IEC 61850
SCADAControl room monitoringRanges are based on open field with no obstacles. Each added repeater extends the range by approx. 1 km.
03Products · specifications
Gas Valve Open/Close Detection Sensor
Model MWSG-100
| Size | W73 × D47 × H84 mm |
|---|---|
| Frequency | 920.700 MHz (FSK) |
| Transmission range | approx. 100 m (open field) |
| Power | Self-powered (no battery) |
| Dust · water protection | IP57 |
| Application | Gas valve |
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 |
LCD touch panel
Model —
| LCD panel | 12.1-inch, 1024 × 768 industrial |
|---|---|
| Display | MAP image screen, icons, valve open/closed display |
| Operation | Resistive touch panel |
| Protocol | RS485 |
| Screen switch | LCD screen ON/OFF (power-saving mode) |
Digital dedicated monitoring panel
Model —
| Size | W600 × D2,000 × H600 mm |
|---|---|
| Data collection unit | Built-in Signal Monitor |
| Data processing unit | IED (IEC 61850) |
| DC supply voltage | DC 125 V |
| AC supply voltage | AC 220 – 380 V (60 Hz) |
| Network | GOOSE Optical communication (100 Mbps) |
04Case studies
2024.09Daegu Headquarters, 1 BAY
On-site supervisor LCD monitoring when a valve operates + control room SCADA monitoring via RS-485 relay contacts — a dual monitoring system
2026.06Installation completed on all 154 kV sections, Daegu Headquarters
Digital monitoring system for 3 types of equipment vulnerable to on-site management (GIS valves · PNL doors · PNL temperature) — LCD (on site) and Web SCADA (control room)
Installed quantity
300GIS valve sensors
100PNL door sensors
100PNL temperature sensors
Field installation photos8
It can be expanded to around 80 substations of the national power utility (some 500 gas valves), regional gas corporations and power plants, and in-house power generation facilities at medium and large factories.
05Benefits
01Benefits
Dual monitoring of GIS valve open/close status across all sections via on-site LCD and control room SCADA
02Benefits
PNL door alarm — alarms if a live equipment panel is opened while the outage work switch is ON, preventing erroneous tests caused by confusing dead and live circuits
03Benefits
Alarms when the temperature inside a PNL exceeds 80 ℃, allowing response before a panel fire
04Benefits
Lower installation costs by simply adding a sensor unit to existing GIS valves
CONTACT MPIA
GIS Substation Power Safety Platform
A system that mounts self-powered sensors on gas valves to show GIS valve open/close status on an LCD panel and sends the status to SCADA to prevent mis-operation