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Oil & Winding Temperature Indicators
Oil & Winding Temperature Indicators
Perfect Controls offers Oil & Winding Temperature Indicators, Model PC 414. 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.
- Round Dial model for distribution transformers
- Self powered operation
- Liquid in Metal expansion type
- Ergonomically designed 240 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 3m provided as standard
- 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.
- Switch and circuit testing facility provided from outside the case
- Maximum Temperature indicating pointer is provided
- All components are made of brass and non ferrous materials for reliable long-term performance
- No periodic site adjustments
- On Model PC414, Two Microswitches or Two Mercury switches are provided as standard
- For more number of switches, Model PC252 can be used
- Mercury switches have 2A, 250V ac/dc rating
- Microswitches have better vibration resistance
- Microswitches are not sensitive to deviation from vertical mounting
- Also, use of mercury is banned in many countries
- All Micro switches in PC414 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
Model PC 414
Liquid in Metal Expansion type Oil Winding Temperature Indicators
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