MR TAPCON 250 - Voltage Monitoring

9 Operation
Maschinenfabrik Reinhausen GmbH 2022 1238595028/00 EN TAPCON
®
250
▪ The voltage transformer VT is connected to the phase conductors L1 and
L2.
▪ The current transformer CT is looped into the phase conductor L1.
▪ The current I
L1
lags behind voltage U
L1
-U
L2
by 30°. This corresponds to a
phase shift of +30° and a correction value of -30°.
▪ The voltage drop on a phase conductor is determined by the current I
L1
.
If you use this circuit, set the device as follows:
Parameter Option
Voltage-transformer circuit 3Ph differential voltage
Current-transformer circuit 3 Ph phase current
Phase angle correction -30°
Table34: Circuit 1-F
9.2.2 Voltage monitoring
In order to monitor the transformer's current output voltage, you can set
4limit values:
▪ Undervoltage U<<: Lower limit2
▪ Undervoltage U<: Lower limit1
▪ Overvoltage U>: Upper limit1
▪ Overvoltage U>>: Upper limit2
If the measured value is higher than the upper limit (> or >>) or lower than
the lower limit (< or <<), the device transmits an event message.
U>>
U<
U
t
U>
U<<
t
V
t
E
H
Figure65: Example of voltage monitoring with the limit value Overvoltage U> being exceeded
U>> Overvoltage U>> U> Overvoltage U>
U< Undervoltage U< U<< Undervoltage U<<