6 Commissioning
Maschinenfabrik Reinhausen 201446 222/08 ENTAPCON® 240
21. Set delay time T1 [► 70] and delay time T2 [► 71] 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 % [► 80].
3. Set the absolute limit values parameter to Off [► 78].
4. Set the U< blocking parameter to On [► 81].
5. Set desired value 1 such that the measured voltage is below the under-
voltage U< [%] limit value [► 67].
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.
8. Reset the operating values for desired value 1 and undervoltage U<
[%] to the desired operating values.
ð The function test for undervoltage blocking is complete.
Checking overvoltage blocking U>
1. Press to select manual mode.
6.3.2
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