Woodward HighPROTEC MRU4-2 G Series, Manual

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2.3 G99-Specific LoM Protection Settings
For Loss of Mains (ROCOF, Intertripping), the G99-type-tested variant of the MRU4
features the following settings:
• Intertripping is enabled by default, as it is expected for the Type D , but can be
disabled.
• »df/dt« (ROCOF) is enabled by default in the [Device planning] menu, as it is
expected for the Types A, B and C , but can be disabled.
The threshold and delay times are fixed according to the EREC G99‑1‑6
requirements.
2.3.1 Intertripping
Intertripping . Mode [Device planning]
use Intertripping Module, general operation mode:
This is enabled by default, but can be disabled.
For the password-protection (of access level
“S.3”), see the “Security” chapter in the generic
MRU4 User Manual.
S.3
Intertripping . Function [Protection Para / Set 1…4 / Intercon-Prot / Mains
Decouplg / Intertripping]
• Set 1: inactive
• Set 2: inactive
• Set 3: inactive
• Set 4: inactive
Permanent activation or deactivation of Intertripping:
This module is inactive by default, because the factory-
preset enables the
Types A, B and C HV protection, and
Intertripping is expected only for Type D .
For a Type D application, set this to active.
For the password-protection (of access level “P.2”), see
the “Security” chapter in the generic MRU4 User
Manual.
P.2
21 MRU4 MRU4-3.6-EN-G99
2 G99-Specific Protection Settings
2.3 G99-Specific LoM Protection Settings