3UG4.1 line monitoring relay
6.6 3UG4615 / 3UG4616 line monitoring relays
3UG4 / 3RR2 monitoring relays
148 Manual, 05/2016, NEB927043002000/RS-AC/004
Meaning of the information on the display
Note
Indications in the event of a fault
The symbols on the display flash to indicate an error.
The following statuses and line faults are indicated as a diagnostics message with flashing
symbols:
200V Measured voltage is displayed
Lx Flashing: Phase failure detected
Flashing: Incorrect phase sequence detected
Monitoring for voltage overshoot
②
Monitoring for voltage undershoot
②
Range monitoring (monitoring for voltage overshoot and undershoot)
Voltage is in correct range
A voltage overshoot has occurred
A voltage undershoot has occurred
U▼
• Not flashing: Relay contact 11/12 open, relay contact 11/14 closed
• Flashing: Delay time (tripping delay) is running
• Masked out: Relay contact 11/12 closed, relay contact 11/14 open
③
U▲
• Not flashing: Relay contact 21/22 open, relay contact 21/24 closed
• Flashing: Delay time (tripping delay) is running
• Masked out: Relay contact 21/22 closed, relay contact 21/24 open
Note
On phase failure or phase sequence error, both CO contacts respond.
Note
If the monitoring relays are used downstream of a frequency converter, it is necessary to
obtain a waveform without additional
zero crossings of the voltage. This can be achieved
-wave filter.
You will find more information about the switching behavior of the output relays in Chapter
"Functions (Page 143)".
To Next Page
Loading...
