AQ-T257 Transformer Protection IED
AQ-T257 transformer protection IED with differential protection function and an integrated automatic voltage regulator function.
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The relay provides complete current-based and voltage-based protection functions as well as full measurements. You can add up to nine (9) I/O or communication cards into the device for extensive monitoring and control applications. AQ-T257 communicates using various protocols, including the IEC 61850 substation communication standard.
- A large I/O capacity
- Automatic/manual voltage regulating (AVR)
- Complete transformer protection
- 2nd and 5th harmonic blocking
- Automatic verification of a connection group and nominal value settings
- Overloading and through fault statistics for preventive maintenance
- Power and energy measurement class of 0.2S
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