The WOODWARD SEG XI1I1 is a digital microprocessor-based protection relay designed for selective overload and short-circuit protection in radial or meshed electrical networks. It features a versatile 1A current input and supports multiple time-overcurrent characteristics, including Definite Time (DMT) and three Inverse Definite Minimum Time (IDMT) curves, allowing for precise coordination with upstream and downstream protective devices.

Product Q&A

Q: What is the main application of the XI1I1 module in a power system? A: It is primarily used as a universal time overcurrent protection relay for electrical machines, feeders, and transformers. It serves as both primary protection for overload/short-circuit conditions and as a back-up for differential or distance protection relays.

Q: How are the tripping parameters configured on this module? A: Settings are adjusted using high-precision DIP-switches and potentiometers located on the front plate. Users can select the specific tripping characteristic (e.g., Normal Inverse or Definite Time) and set current/time multipliers for both low-set (I>) and high-set (I>>) elements.

Q: Does the XI1I1 require a specific auxiliary power source? A: The module is equipped with a universal wide-range power supply that accepts a vast range of voltages from 19V to 390V DC or 36V to 275V AC, making it compatible with almost any industrial control battery or AC supply.

Recommended Stock: Alternative Brands & Models

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