W-PD7 Winding Hot Spot Monitoring System
W-PD7 transformer winding temperature monitoring system is designed for optical fiber the high voltage transformer application and design. It and early products like the stability, the calibration of the optical fiber sensor can, with long life LED light source of, so as to improve the reliability of system, reduce the maintenance.
W-PD7 are modular instrument, can install in architecture type or NEMA-4 cabinet combination two forms supply, provide 1 to 12 with independent output and display the measurement channels. The system includes: built-in since diagnosis function, each channel independent programmable alarm and relay output setting, and to provide comprehensive surge protection.
Since the temperature sensor calibration by stability, high temperature resistant fluorescent materials directly in optical fibers and even one end to form. When a instrument LED by the light pulse, through the optical fiber to contact and winding sensor of a light pulse, the incentive of the sensor fluorescent material, so as to produce wavelength long fluorescent. According to return to the fluorescence attenuation time, through calculation and according to the table of access storage temperature correction, and measure the sensor place temperature, then through the CPU temperature and show the system parameter, and can also will information through the analog output transmission to distant stations.
W-PD7 system provides direct measurement of winding temperature means. While the traditional winding temperature indicator is a built in transformer hot model based on the measurement method of directly. The simulation hot the accuracy of measurement depends on hot the precision of the model, and by the oil temperature around the serious influence. Because the traditional temperature measurement of the temperature is based on the instructions of transformer oil temperature change of the average tank, so it is difficult to reflect the winding or inter-circle oil temperature rapid change way. In addition, the traditional winding temperature, the temperature of the instructions still depends on the surface the position of the Chinese tank thermocouple. For an emergency to add load decision, transformer winding real temperature is the key factor.
• No long-term drift
• No correction and regular maintenance
• The probe independent of instruments
• The probe can be placed in advance
• The probe and equipment can mix match
• Long service life solid LED light source
| Measurement Accuracy |
+/- 2 C |
| Analog Output |
0-1 mA or 4-20mA |
| Number of Control Relays |
6 |
| System Status Relay |
yes |
| Digital Interface |
RS-232 (optional RS-485, Modbus) |
| Relay Type |
Form C ( A,B optional) |
| Power Supply |
Continuous (110-240 AC/DC) |
| Display |
Large LED screen (1 inch per channel) |
| Alarms |
programmable |
| Alarm Lights |
yes |
| Surge Protection |
C37.90.1 IEEE standard |
| Mounting Options |
Panel, Rack or NEMA |
| Terminal Connections |
Phoenix ring type of connection |
| Memory Storage |
Storage 1 year data (1 / points) |
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