RED670 1MRK004810-KG Line differential protection

Disturbance recording and fault locator are available to allow independent post-fault analysis after primary disturbances. The Disturbance recorder will also show remote station currents, as received to this IED, time compensated with measure communication time.
Out of Step function is available to separate power system sections close to electrical centre at occurring out of step.
The IED can be used in applications with IEC 61850-9-2LE process bus with up to six merging units (MU) depending on other functionality included in the IED.
Each MU has eight analogue channels, normally four currents and four voltages. Conventional and Merging Unit channels can be mixed freely in the application.
The logic is prepared with a graphical tool. The advanced logic capability allows special applications such as automatic opening of disconnectors in multi-breaker arrangements, closing of breaker rings, load transfer logics etc. The graphical configuration tool ensures simple and fast testing and commissioning.
A loop testing function allows complete testing including remote end IED when local IED is set in test mode. Communication via optical connections ensures immunity against disturbances.

RED670