Voltage Transformer Ratio - janitza Prophi Operating Instructions Manual

Reactive Power Controller

Voltage transformer ratio

If the measurement and operating voltage for Prophi is
taken from a voltage transformer, the voltage trans-
former ratio can be set. This ratio is build by number 1
and number 2 .
Voltage transformer ratio =
The setting ranges for the numbers 1 and 2 are:
number 1 : 1 - 9.999k
number 2 : 1, 10, 100, 110, 200, 230, 400
In this example, the
presettings are indi-
cated with
number 1 = 1 and
number 2 = 1.
Example: Programming voltage transformer ratio
A voltage transformer has a primary of 20000V and a
secondary of 100V.
The result is a ratio of
20000V
= 200
100V
The measurement and supply voltage mentioned on type
plate of Prophi must be 100V.
To set the ratio of 200, several combinations of number
1 and number 2 are possible.
e.g. number 1
=
number 2
or number 1
=
number 2
Attention! If a wrong voltage transformer ratio is set,
all voltage as power is indicated incorrectly.
= Key 1
number 1
number 2
V
Prog
Number 1
V
Prog
Number 2
200
= 200
1
2000
= 200
10
= Key 2 = Key 3
Programming number 1
Leaf to number 1 for voltage transformer ratio in ex-
panded programming using key 3. Confirm with key 1.
In this example,
number 1 = 1.
Select the digit to be
changed by pressing
key 2. The selected digit is flashing.
Change the selected digit using key 3.
With key 1 you can leave programming mode and with
key 3 you continue expanded programming.
Number 1 is indicated with a decimal point automati-
cally, when the value gets bigger than 1000.
Example: Voltage transformer ratio = 1200
1200 = 1.200k
Indication "1.200kV"
Programming number 2
Leaf to number 1 for voltage transformer ratio in ex-
panded programming using key 3. Change to number 2
with key 2. In this ex-
ample a value of 1 is
indicated for number 2.
Confirm selection with
key 1.
The value flashes.
With key 2 and key 3
the needed value can
be selected for number
2 from a list of values
(1, 10, 100, 110, 200,
230, 400).
Confirm selection with key 1. The selected value does
not flash anymore.
Continue expanded programming with key 3.
V
Prog
kV
Prog
V
Prog
V
Prog
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