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251/02 en
5 Commissioning
5.3
Easy setting of operating modes with Normset
Prior to commissioning, be sure to check the entire circuity
and the measuring and operating voltage. To assess the
working mode of the voltage regulator, the use of a regis-
tering device to record the regulator voltage (actual voltage
level) is highly recommended.
The related transformer should be subject to normal load.
a)
Select the MANUAL operating mode at TAPCON
®
230 VC
b)
Select the NORMSET function as indicated under 4.1
c)
Set the Desired Voltage Level 1 as indicated under 4.2.
If you do not require a voltage display of the primary voltage
in kV you may now proceed to initiate the regulator by
operating the AUTO function key.
If you do require a voltage display in kV, however, please
proceed as follows:
d) Set the rated transformer voltage and the rated
transformer current as indicated under 4.8.
If you wish to configure the TAPCON
®
230 VC voltage regu-
lator to suit your specific requirements, please proceed as
indicated under 5.4.
5.4
Function tests; operational settings
Prior to commissioning, be sure to check the entire circuity
and the measuring and operating voltage. To assess the
working mode of the voltage regulator, the use of a
registering device to record the regulator voltage (actual
voltage level) is highly recommended. The related transfor-
mer should be subject to normal load.
a) Select the MANUAL operating mode at TAPCON
®
230 VC
b) Set the transformation ratios of the transformers as
specified under paragraph 4.8, as well as the measuring
circuit.
c) Let the measured actual voltage (= voltage from the
voltage transformer) be indicated on the display of the
voltage regulator.
d) Let the current, power, and phase angle values be
indicated on the display and compare these values with
those from possibly existing service measuring
instruments. If wrong signs are indicated, reverse the
polarity of the current or voltage transformer.
e) Set the desired voltage level. By manual control of the
motor-drive, bring the on-load tap-changer to the service
position so that the desired voltage level is obtained
(see paragraph 5.5).
f)
Set the VOLTAGE LEVEL to this value.
g) Set the bandwidth "
Δ
U max“ to 1.0 %. In most cases the
voltage regulator is now in a balanced state (no presignal
LED lamp lights up). Otherwise change the desired voltage
level in steps of 0.5 V until a balanced state is reached.
h) Set the bandwidth „
Δ
U max“ dependently of the step
voltage (see paragraph 4.3).
i)
Set the delay time T1 to 20 s lin. as per paragraph 4.4;
by manual control, move the on-load tap-changer
towards "Raise"
(arrow in the display right "–>")
by one
step, the presignal LED lamp for "Lower“
(arrow in the
display left "–>")
must come on. Set the mode of opera-
tion to "AUTO"; 20 s after the presignal lamp lights up,
the voltage regulator must control the on-load tap-
changer back to its previous service position. The pre-
signal LED lamp goes out. Set the mode of operation to
"MANUAL". Repeat the control procedure towards
"Lower".
Set the operating delay time T2 to 10 s. Set the mode of
operation to "MANUAL". By manual control, move the
on-load tap-changer towards "Raise" by two steps, the
pre-signal LED lamp for "Lower" must come on.
Set the mode of operation to "AUTO", then 20 s after the
presignal lamp has come on, the voltage regulator must
automatically control the on-load tap-changer back to
its previous service position by one step and after further
10 s by another step.
Set the delay times T1 and T2 to the desired value. If T2 is
not utilized, the "OFF" setting will be required.
When putting the transformer into service, it is recom-
mended to set the delay time T1 provisionally to 100 s.
Depending on the existing operating conditions, you may
want to determine the definitive setting only after some
time of observation. For this purpose it is recommended
to register the variation of the actual voltage and the
number of tap change operations on a day-to-day basis.
If an inverse response of the voltage regulator is desired,
set an integral time response for the delay time 1. In this
case the delay time is automatically shortened inversely
proportional to the deviation.
j) a