A Potential Transformer (PT) is a type of instrument transformer used to step down high voltage to a lower, standardized voltage suitable for measurement, protection, and control equipment. PTs provide accurate voltage readings while isolating the connected devices from the high-voltage system for safety.
| Feature | Details |
|---|---|
| Voltage Rating | Available from 3.3 kV to 400 kV for various system requirements |
| Accuracy Class | 0.2, 0.5, 1.0 for metering; 3P, 5P for protection purposes |
| Frequency Range | 50 Hz or 60 Hz for compatibility with different regions |
| Insulation Medium | Resin-cast, oil-filled, or gas-insulated (SF6) for durability |
| Primary Voltage | Direct connection to the high-voltage system |
| Secondary Voltage Output | Typically 110V or 120V for control, protection, and metering |
| Burden Capacity | Varies from 10 VA to 500 VA depending on the application |
| Phase Configuration | Available in single-phase and three-phase models |
| Protection Features | Integrated surge protection to handle transient overvoltages |
| Operating Temperature | Suitable for -40°C to +70°C environmental conditions |
| Compliance Standards | Meets IEC 61869-3, ANSI C93.1, and IS standards for voltage transformers |
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