Carlo Gavazzi WM5-96 - Manual (Page 15)

Programming WM5 96
This function allows the user to select the type of electrical system
choosing among:
1- single phase 2 wires (1-PHASE 2-WIRE),
2- dual phase 3 wires (2-PHASE 3-WIRE),
3- three phase 3 wires and 1 CT balanced load (3-PH 3W+1CT BAL.),
4- three phase 3 wires unbalanced load (3-PH 3W UNBAL.),
5- three phase 4 wires unbalanced load (3-PH 4W UNBAL.).
Choose by means of the “ ” key the SYSTEM function (1) , press
the “S” key to confirm, then select by means of the “ ” keys the
desired system (2) and confirm the selection with the “S” key.
This function allows the user to select the value of the CT ratio (pri-
mary/secondary ratio of the current transformer being used). Example:
if the CT primary (current transformer) has a current of 300A and the
secondary a current of 5A, the CT ratio corresponds to 60 (obtained
using the following calculation: 300/5). Choose the CT RATIO function
(1) by means of the “ ” keys and confirm the selection with the
“S” key. Then select the desired value by means of the “ ” keys
(2) and confirm the value with “S”.
The instrument displays the maximum and the minimum value
available for the CT ratio.
This function allows you to select the value of the VT-PT ratio (pri-
mary/secondary ratio of the voltage transformer being used).
Example: if the primary of the connected VT (voltage transformer) is
20kV and the secondary is 100V, then the VT-PT ratio corresponds to
200 (obtained carrying out the following calculation: 20000/100).
Choose the VT-PT RATIO function
(1) by means of the “ ” key and
confirm the selection with “S”. Then select by means of the “ ”
key the desired value (2) and confirm the value with the “S” key.
The instrument displays the maximum and minimum value avail-
able for the VT-PT ratio. a
a
System
CT ratio
VT ratio
13
WM5-96 Instruction Manual
********** MMAAIINN MMEENNUU **********
RREEVV.. 11..44..22..66 ((AAVV55))
CHANGE PASSWORD
MODULES
SYSTEM
CT RATIO
********** MMAAIINN MMEENNUU **********
RREEVV.. 11..44..22..66 ((AAVV55))
CHANGE PASSWORD
MODULES
SYSTEMA
CT RATIO TA
1-PHASE 2-WIRE
2-PHASE 3-WIRE
3-PH 3W+1CT BAL.
3-PH 3W UNBAL
1
2
******MMAAIINN MMEENNUU******
RREEVV.. 11..44..22..66 ((AAVV55))
CHANGE PASSWORD
MODULES
SYSTEM
CT RATIO
******MMAAIINN MMEENNUU******
RREEVV.. 11..44..22..66 ((AAVV55))
CHANGE PASSWORD
MODULES
SYSTEMA
CT RATIOORTO TA
RAPP. TA ? 1 .000
min 0.100
max 6000
123...
a
1
2
******MMAAIINN MMEENNUU******
RREEVV.. 11..44..22..66 ((AAVV55))
MODULES
SYSTEM
CT RATIO
VT-PT RATIO
******MMAAIINN MMEENNUU******
RREEVV.. 11..44..22..66 ((AAVV55))
MODULES
SYSTEM
CT RATIO ORTO TA
VT-PT RATIOORTO TA
VT RATIO ? 1 .000
min 1.000
max 6000
123...
a
1
2
> 2s
> 2s
> 2s
Measure
> 2s
> 2s
Measure
> 2s
Go back
Go back
Confirm
Confirm
Measure
Go back
Confirm