Měřící Energetické Aparáty
12
When the item
Outlet
is selected, all three voltages, three currents and three phases or
active powers are displayed simultaneously, or the total active power of the outlet.
By selecting the item
Interval
you can select the repeat interval to display new values
in seven steps from 0.2 sec to 12.8 sec. By selecting the item
Method
, you can select the
display in absolute units or in % of the rated value.
After you select the items
Voltage measurement parameters
and
Current measurement
parameters
for the first time, the item
Password
appears to prevent from unauthorized
intervention into the setting or displaying of parameters of the voltage and current
measuring chain.
The password is four-digit and is set in the form of 3355. Each of the password digits can
be selected separately using the buttons
↑
and
↓
and is confirmed by the button
Select
.
After entering all of the four password digits, complete the entry by pressing the button
End
. The password can be changed and read by the PC program. Even if the password
is not entered correctly, you can browse parameters of the current and voltage chain but
possible changes are not realized after you press the button
Select
.
By selecting the item
Voltage measurement parameters
, you display the items
Level
,
Voltage
and
U
nom
. To select the line with the required item, use the buttons
↑
and
↓
.
After selecting the item
Level
you can use the buttons
↑
and
↓
to set the
LV
,
MV
,
MVL
and
HV
level. After you press the button
Level
selection, the instrument made for the
rated voltage 57.7 V will accept MV, MVL or HV levels and the instrument made for the
rated voltage of 230 V will accept only the LV level. By selecting the item
Voltage
you can
set and select the display of phase or delta voltages. By selecting the item
U
nom
you can set
only the value of 230 V for the LV level, delta voltages of 3 kV, 6 kV, 10 kV, 20 kVA, 22 kV
and 35 kV for the MV level and delta voltages of 110 kV, 220 kV and 400 kV for the HV
level. The non-standard MV voltage 20 kV can be substituted by any other non-standard
real value by changing the program.
By selecting the item
Current measurement parameters
you display the items
I
prim
and
I
sec
. In the item
I
prim
you can set one of the standard values of primary currents
of the measuring current transformers: 1 A, 5 A, 10 A, 12,5 A, 15 A, 20 A, 25 A, 30 A,
40 A, 50 A, 60 A, 75 A, 100 A, 125 A, 150 A, 200 A, 250 A, 300 A, 400 A, 500 A, 600 A,
750 A, 1000 A, 1250 A, 1500 A, 2000 A, 2500 A. You can also set a non-standard value
of the primary current of the current transformer
User
. The item
I
sec
displays the size of
secondary input of the measuring current transformer, for which input current circuits
of MEg40
+
are prepared. The default values are 1 A or 5 A. When a measuring current
split core transformer PTD is used and current inputs of the instrument MEg40
+
/S1 are
connected in the corresponding way, the character
S1
is displayed. The designation
S3
is
for the use of flexible sensors AMOSm. When S1 is selected, rated primary currents of
transformers PTD can be set at 100 A, 200 A, 300 A, 400 A, 500 A, 600 A a 900 A. When
S3 is selected, rated primary currents of sensors AMOSm can be set at 250 A, 500 A,
1000 A a 2000 A.
Summary of Contents for MEg40+
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