5 Commissioning
Maschinenfabrik Reinhausen 201444 2374092/04 ENTAPCON® 260
19. Press to select auto mode.
ð After 20 seconds, the device lowers the on-load tap-changer one
step and after another 10 seconds another step.
20. Press to select manual mode.
21. Set delay time T1 [► 66] and delay time T2 [► 68] to the desired
value.
We recommend a temporary setting of 100 seconds for delay time T1 when
commissioning the transformer. Depending on the operating conditions, you
can also specify the delay time following a longer observation period. In this
regard, it is useful to register how the actual voltage progresses and the
number of tap-change operations per day.
Checking additional functions
This section describes how you can check the following additional functions:
▪ Undervoltage blocking
▪ Overvoltage blocking
▪ Activation of desired values 2 and 3
▪ Line drop compensation
▪ Z compensation
Proceed as follows:
Checking undervoltage blocking U<
1. Press to select manual mode.
2. Set undervoltage U < [%] to 85 % [► 70].
3. Set the absolute limit values parameter to Off [► 69].
4. Set the U< blocking parameter to On [► 71].
5. Set desired value 1 such that the measured voltage is below the under-
voltage U< [%] limit value [► 65].
Measured voltage = 100 V
Desired value 1 = Set to 120 V (greater than 100 V/0.85 = 117 V).
ð The Undervoltage U< LED will light up.
ð After around 10 seconds the Undervoltage message appears in the
display and the relevant signaling relay is activated.
6. Press to select auto mode.
ð The device blocks and does not issue any control commands.
7. Press to select manual mode.
5.3.2
To Next Page
Loading...
