2.2
G99-Specific Frequency Protection Settings
The MRU4 features six instances of the frequency protection module.
• »f[1]« is configured and fixed as under-frequency stage 1.
• »f[2]« is configured and fixed as under-frequency stage 2.
• »f[3]« is configured and fixed as over-frequency stage 1.
• »f[4]«, »f[5]«, »f[6]« are not enabled by default, but may be enabled and adapted to
the application if necessary. (See the Reference Manual of the generic MRU4 variant
for available settings.)
2.2.1
f[1]: Underfrequency Protection Settings
f[1] . Mode
[Device planning]
f<
Frequency protection instance number 1:
Configured as underfrequency protection.
This setting is fixed according to the G99
requirements and cannot be modified.
Fixed
setting!
f[1] . f<
[Protection Para / Set 1…4 / f-Prot / f[1]]
• Set 1: 47.50 Hz
• Set 2: 47.50 Hz
• Set 3: 47.50 Hz
• Set 4: 47.50 Hz
Pickup value for underfrequency.
This setting is fixed according to the G99
requirements and cannot be modified.
Fixed
value!
f[1] . t
[Protection Para / Set 1…4 / f-Prot / f[1]]
• Set 1: 20.00 s
• Set 2: 20.00 s
• Set 3: 20.00 s
• Set 4: 20.00 s
Tripping delay
This setting is fixed according to the G99
requirements and cannot be modified.
Fixed
value!
18
MRU4
MRU4-3.6-EN-G99
2 G99-Specific Protection Settings
2.2 G99-Specific Frequency Protection Settings
