MR TAPCON 250 - Incorrect measured values

11 Fault elimination
Maschinenfabrik Reinhausen GmbH 2022 1758595028/00 EN TAPCON
®
250
Web browser
Characteristics/details Cause Remedy
Connection to the visualization
cannot be established.
Connection cable defective. Check connection cable.
SSL encryption active. Accept SSL certificate in browser.
Call up IP address using https://.
Deactivate SSL encryption.
PC not in same subnet as visual-
ization.
Check the setting of IP addresses of the device
and PC and correct if necessary.
Incorrect display of visualization
in the web browser.
Access to the visualization using
a web browser after a software
update.
Delete the web browser's cache.
Table52: Web browser
11.5 Incorrect measured values
Characteristics/details Cause Remedy
Measured voltage
▪ No measured value available.
Connection has no contact in the
plug terminal.
Check the wiring and plug terminal.
Insulation trapped.
Wire is not inserted far enough.
Miniature circuit breaker has
tripped.
Check the fuse.
Connection faulty. Check wiring.
Connect as shown in the connection diagram.
Measured voltage
▪ Measured value too low
Voltage drop on the measuring
line.
Check the measured voltage.
Measured voltage
▪ Measured value fluctuates
Possible sources of interference:
▪ Cables laid in parallel.
▪ Tap-change operations.
Check the measured voltage.
Increase the distance from the source of inter-
ference.
Install a filter if necessary.
Measured current
▪ No measured value
Line to the current transformer in-
terrupted.
Check wiring.
Short-circuiting jumper in current
transformer is not removed.
Remove the short-circuiting jumper.
Measured current
▪ Measured value too high
▪ Measured value too low
Current transformer not correctly
parameterized.
Correct parameterization.
Table53: Incorrect measured values