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Technical specifications
Description
Dissolved gas analysis (DGA) of transformer oil is a recognized detection method for incipient
transformer faults. The CoreSense complements off-line lab DGA by providing real-time continuous
monitoring of hydrogen and moisture levels in transformer oil.
The CoreSense can also monitor additional parameters provided by external sensors connected to
optional analog inputs. The CoreSense provides a simple local indicator based on three LEDs that allow
the condition of transformers to be determined at a glance, e.g., if the three LEDs are green everything
is normal. All of the readings made by the CoreSense are also available on the built-in web interface and
published through analog outputs and through digital protocols such as Modbus, DNP3 and IEC61850.
Measurement specifications
Hydrogen
technology
Solid state electrochemical palladium-based sensor
hydrogen measurement range
0 to 5000 with a detection limit of 25 μl/l (ppm)
hydrogen measurement accuracy
±25 ppm or ±20%, whichever is higher
hydrogen measurement repeatability h
2
±15 ppm or ±10%, whichever is higher
hydrogen response time
t90 (typical): 30 minutes
t90 (max): 60 minutes
Moisture (optional)
technology
thin-film capacitive type sensor immersed in mineral insulating oil
Moisture measurement range
0 to 1 aw (configurable in aw, Rh%, and ppm)
Moisture measurement accuracy
±0.02 aw
temperature measurement accuracy
±0.2 °C
Mechanical specifications
Dimensions
392 × 264 × 158 mm (14.43 × 10.39 × 6.2 in)
Weight
8 kg (18 lbs)
Interface to transformer
1.5 Npt, male thread
Enclosure
Ip67/NEMa 4x enclosure
Содержание CoreSense
Страница 1: ... USER GUIDE CoreSense Hydrogen and Moisture Sensor ...
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Страница 37: ... Configuring the sensor head 33 Figure 17 Settings tab Help Provides access to system information ...
Страница 43: ... Configuring the sensor head 39 About dialog box Figure 23 About dialog box ...
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