PQRM5300 33 Ux Ix xx xx (PS)
20201120-V1
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7.3.1.2. Voltage Transformers (VT) and Current
Transformers (CT) ratio settings
Function
In the 7.1.2. Transformations menu can you set the ratio of
Voltage and Currents transformers
The voltage inputs of the instrument may connect directly to
the power network (Vin < 250 Vrms [nominal]), or through
voltage transformers (Vin > 250 Vrms [nominal]).
When you connect the inputs directly you should set VT=1.
When you connect the inputs through voltage transformers
you should set the VT ratio of the applied transformers, so
the instrument able to calculate with the primary voltage.
(e.g. 1000/100 V/V, VT=10)
[VT Factory default: 1.]
The current input of the instrument may connect directly to
the power network (Iin < 5 Arms [nominal]), or through a
current transformer (Iin > 5 Arms [nominal]).
When you connect the input directly you should set CT=1.
When you connect the input through a current transformer
you should set the CT ratio of the applied transformer, so
the instrument able to compute with the primary current.
(e.g. 100/5 A/A, CT=20)
[CT Factory default: 1.]
Sequence of operations
1. Log in the 7. Configurations menu
2. Choose the 7.1. Measure settings menu of the
7. Configurations menu with
/
buttons, and press
the ENTE switch.
3. Choose the 7.1.2. Transformation menu of the
7.1 Measure settings menu with
/
buttons, and
press the ENTE switch
4. Select the the VT or CT transform with
switch, and
then Press the EDIT switch.
5. Please type the VT/CT value with help
, - , +
switches, and press the OK switch to accept the value.
6. Repeat please the 4. step and 5. step with other CT/VT
transformers.
7. Press the OK switch to save and to exit from 7.1.2.
Transformations submenu
