111
Checking grid monitoring parameters
A
GEN
MNT
ERR
GRD
DCT
SET
ITEM
STATE
B
Fig. 81
1.
Remove cover
A
.
2.
On programming unit
B
, use in
ITEM
to select
the required display (
81
to
8c
).
In displays
81
to
8c
, the set value and the
response time are shown alternately.
For an explanation of the displays: See the follow-
ing table.
Note
The Vitovalor has grid and system protection integra-
ted in the fuel cell module. The specified response
times consist of the settings for the protection relay
and the disconnection time of the coupling switch.
ITEM
Meaning
Set value
Response time
81
AC undervoltage stage
184 V
2.5 s
83
AC overvoltage stage 1
262.2 V
1.0 s
84
AC overvoltage stage 2
237.7 V
0.5 s
85
Frequency drop stage 1
47.5 Hz
20.0 s
86
Frequency drop stage 2
47 Hz
0.5 s
87
Frequency rise
52 Hz
0.5 s
8a
Islanding operation
1.0 Hz/s
0.0 s
8b
Nominal voltage
230 V
—
8c
Nominal current
3.26 A
—
Removing the SD card
The SD card is delivered already in place. Data stor-
age for the fuel cell module begins as soon the
Vitovalor PT2 is commissioned.
Diagnosis and service checks
Fuel cell module
(cont.)
5853335
Diagnosis
