Switchgear temperature monitoring system with WTMS wireless sensors
Application areas
The WTMS temperature monitoring system is designed for continuous temperature measurement of current-carrying elements, contact systems and other elements of indoor switchgears in the voltage range of 0.4-40.5 kV.
The WTMS kit consists of a terminal (1 pc), a signal receiver (1 pc) and wireless sensors (from 3 to 60 pcs):
Three types of wireless sensors can be used in the WTMS system: 100, 200 and 400 series.
The WTMS kit consists of a terminal (1 pc), a signal receiver (1 pc) and wireless sensors (from 3 to 60 pcs):
- The temperature sensor is installed directly on the current-carrying element or at any point where temperature monitoring is required, and is connected to the receiver via a wireless radio signal.
- The signal receiver, in turn, is installed on the terminal and is equipped with a remote antenna to increase the range. In addition to temperature indication, when the set temperature is exceeded and the monitored point overheats, the terminal outputs a signal via two digital outputs, which can be used in RPA systems.
Three types of wireless sensors can be used in the WTMS system: 100, 200 and 400 series.
Oil and dry types
Switchgears and cabinets up to 1000V AC and DC
7.2(12), 24, 40.5 kV with air, combined, solid and gas insulation
Relay protection, process control
up to 1000V and 7.2(12), 24, 40.5 kV
Data centers
System architecture principle
Upper level
ACS, SCADA
Middle level
WTMS terminal / Temperature monitoring cabinet
Lower level
Wireless temperature sensors
Communication protocol with the upper level – Modbus-RTU
Sensors per terminal – up to 60
Sensors per terminal – up to 60
Wireless temperature sensors
Sensor series
-
– 100 –Suitable for DC systems -
– 200 –Suitable for DC systems -
– 400 –Powered by current circuits
Key characteristics
- Accuracy
±1°C - Range
150 m - Temperature range
-50...+125°C - Frequency
470 MHz
Mounting options:
-
On busbar
Any type
-
Bolted
Secure
-
Strap
Flexible
100 and 200 series sensors
Battery powered
- 470 MHzData transmission frequency
- 150 mCommunication distance
- 25 secSampling frequency
- 25 sec - 5 minTransmission frequency
- -50...+125°CTemperature range
- ±1°CMeasurement accuracy
- Strap / BoltInstallation
Battery type – ER2450 3.6V, 8mA
Battery life – not less than 5 years
Battery life – not less than 5 years
400 series sensors
Without additional power supply
- 470 MHzData transmission frequency
- 150 mCommunication distance
- 15 secSampling frequency
- 15 secTransmission frequency
- -50...+125°CTemperature range
- ±1°CMeasurement accuracy
- Power sourceAC current circuits, actuation at current >8A
- No battery replacement required!
Key advantage – Autonomous power supply
Maintenance – Maintenance-free
Maintenance – Maintenance-free
WTMS terminal
Central node
- 80-270 VAC power supply
- 100-300 VDC power supply
- 50 HzFrequency
- 1200-19200 bpsTransmission rate
- -10...+55°COperating temperature
- up to 95%Humidity
- ±1°CError
- IP 55 / IP 20Protection
-
Modbus-RTU
Communication protocol
-
100/200/400
Compatibility
-
2 W
Consumption
-
50,000 hours
Mean time between failures
-
up to 240
Sensors per transceiver
-
2 (AC 250V/5A, DC 30V/5A)
Relay output
Sensor installation examples
Real applications
Predictive protection and automation
System advantages
- 1 – Early detectionTriggers at an early stage in case of an abnormal situation
- 2 – IndependenceIndependent of RPA settings
- 3 – FlexibilityCan work without RPA devices and together with them
- 4 – Damage preventionProtects MV switchgears, LV switchgears, power transformers
Monitoring and diagnostics
System advantages
- 1 – Personnel safetyRemote monitoring without risk to maintenance personnel
- 2 – Equipment protectionPrevention of accidents and damages
- 3 – Cost reductionOperating savings: 50-80%
- 4 – Network reliabilityIncreasing observability and reliability of the power grid
Innovative solutions for reliability
The temperature monitoring system provides continuous temperature monitoring of critical electrical equipment nodes, preventing accidents and reducing operating costs
Accuracy ±1°C
Range 150 m
50,000 hours
Savings 50-80%
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