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Oil & Winding Temperature Indicators
Oil & Winding Temperature Indicators
Perfect Controls offers Oil & Winding Temperature Indicators, Model PC 252. Liquid in Metal Expansion type Oil & Winding Temperature Indicators are used for protection of Power and Distribution Transformers in various models and versions for different transformers and manufacturers.
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- Specially designed to protect medium & large power transformers
- Self powered operation
- Liquid in Metal expansion type
- Ergonomically designed 60 deg dial for optimum viewing
- Complete Ambient temperature & Head compensation
- IP55 weather proof ventilated case, can be directly mounted on transformer
- Various Measuring ranges: 0-150°C, 20-140°C, 30-150°C, 0-120°C
- Measuring accuracy of 1.5% fsd.
- Stainless steel armour sheathed capillary of 5m, 6m, 10m, 12m can be provided
- Winding Temperature is measured using a special Thermal Imaging device which is specially designed for each transformer manufacturer
- Thermal imaging device accurately simulates the winding temperature gradient as a function of CT secondary current
- Since the time constant of the thermal imaging device is same as oil immersed transformer winding, the winding temperature is accurately tracked with respect to time.
- Up to four Microswitches or Mercury switches are provided for Alarm, trip, cooler fan/pump operation
- Mercury switches have 5A, 250V ac/dc rating
- All Micro switches in PC252 have 15A, 250V ac rating
- For higher dc rating Model PC171 with MBO microswitches can be used
- All circuits to earth are tested at 2500V, 50Hz for 1 minute