9 Visualization
Maschinenfabrik Reinhausen GmbH 2020230 4453918/14 ENETOS
®
TD
The device also shows the differences in contact wear for different contacts.
Figure165: Contact wear
► Go to Information > On-load tap-changer > Contact wear.
9.25.6 Configuring OLTC PreCheck
The OLTC PreCheck function is used to prevent damage on the on-load tap-
changer by on-load tap-changer operations under unauthorized operating
conditions. OLTC PreCheck monitors compliance with the following limit val-
ues for this purpose:
▪ Overcurrent I>>
▪ Oil level OLTC >> and oil level OLTC << (optional)
▪ Oil temperature >> (optional)
If a measured value is greater than the limit value, the OLTC PreCheck pre-
vents an on-load tap-changer operation from taking place. OLTC PreCheck
blocks both manual tap position commands (S3 control switch, digital inputs,
SCADA) and automatic voltage regulation. The status of OLTC-PreCheck is
displayed in the "Information > Drive [►Section 9.12, Page 135]" display.
You can set the following parameters for the OLTC PreCheck:
▪ Activate OLTC PreCheck
▪ Limit values
– Oil level (optional)
– Oil temperature (optional)
– Overcurrent I>>
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