Woodward highprotec MRI4, User Manual

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Revision History
SelfSupervision
Device-internal messages (in particular error messages) are now accessible under the menu [Operation / Self
Supervision / Messages].
All messages that can potentially appear here are described in a separate document, the “HighPROTEC
Troubleshooting Guide” (
DOK-HB-TS
).
Supervision
The MRI4 supervises the phase sequence and compares it with the setting that has been made at [Field Para /
General Settings]
»Phase Sequence« (i. e. „ACB“ or „ABC“).
Under the menu [Operation / Status Display / Supervision / Phase Sequence], there is a specific signal for each CT
and VT, which is set active if the check of the respective CT / VT finds that the actual phase sequence is different
from the setting under [Field Para].
LEDs
There is a new automatic acknowledgment mode for all LEDs: The latching of all LEDs is acknowledged (reset) in
case of an alarm (from any protection module).
The automatic acknowledgment must be activated by setting: [Device Para / LEDs / LEDs group A / LED 1...n]
»Latched« = “active, ack. by alarm”
Manual Acknowledgment
It is possible to acknowledge LEDs, SCADA, binary output relays and / or a pending trip command by pressing the
»C« key at the panel. After it has been configured which items shall be be assigned to the
»Ack via »C« key«,
these are acknowledged by simply pressing the »C« key (for ca. 1 second).
Notice: If there is the need to be able to acknowledge without entering any password set an empty password for the
level »Prot-Lv1«.
714 MRI4 DOK-HB-MRI4-2E