Areva/ABB/Siemens relays are having IRIG-B input terminals along with Modbus or DNP 3.0 protocol support. Generally time is set from laptop or front panel of the relay in case of less quantity of relays used in application. But if large quantity of relays used and time stamp accuracy is required IRIG-B is good option.

How to implement IRIG-B time synchronization in Areva protection relays? Anybody have experience on this kind of application? Please give me details of hardware used for it and configuration details.

 

IRIG-B time sync requires some form of external device to act as a signal generator. This is usually a GPS clock with IRIG-B outputs. Some
manufacturers out there are Arbiter (http://www.arbiter.com), Tekron
(http://www.tekroninternational.com) and Ziv (http://www.zivusa.com). A quick internet
search will reveal many more manufacturers.

The IRIG-B signal is simplex, can be installed in a bus or star topology, and comes in two physical formats - modulated (on a 1kHz signal) and unmodulated (usually TTL or RS232 voltage levels). Different relays will have different formats - from memory, I think that the majority of Areva
relays require a modulated input. Check the manuals.

If you're really interested, IRIG-B is fully described at
http://www.jcte.jcs.mil/RCC/manuals/200-04/TT-45.pdf

Regards

Dugald Bell
Western Power
Perth WA Australia